1 e2713e92 2004-04-24 devnull #include <u.h>
2 e2713e92 2004-04-24 devnull #include <libc.h>
3 e2713e92 2004-04-24 devnull #include <ctype.h>
4 e2713e92 2004-04-24 devnull #include <draw.h>
5 e2713e92 2004-04-24 devnull #include <event.h>
6 e2713e92 2004-04-24 devnull #include <cursor.h>
7 e2713e92 2004-04-24 devnull #include <stdio.h>
9 e2713e92 2004-04-24 devnull #define Never 0xffffffff /* Maximum ulong */
10 e2713e92 2004-04-24 devnull #define LOG2 0.301029995664
11 e2713e92 2004-04-24 devnull #define Button_bit(b) (1 << ((b)-1))
14 e2713e92 2004-04-24 devnull But1 = Button_bit(1),/* mouse buttons for events */
15 e2713e92 2004-04-24 devnull But2 = Button_bit(2),
16 e2713e92 2004-04-24 devnull But3 = Button_bit(3),
18 e2713e92 2004-04-24 devnull int cantmv = 1; /* disallow rotate and move? 0..1 */
19 e2713e92 2004-04-24 devnull int top_border, bot_border, lft_border, rt_border;
20 e2713e92 2004-04-24 devnull int lft_border0; /* lft_border for y-axis labels >0 */
21 e2713e92 2004-04-24 devnull int top_left, top_right; /* edges of top line free space */
22 e2713e92 2004-04-24 devnull int Mv_delay = 400; /* msec for button click vs. button hold down */
23 e2713e92 2004-04-24 devnull int Dotrad = 2; /* dot radius in pixels */
24 e2713e92 2004-04-24 devnull int framewd=1; /* line thickness for frame (pixels) */
25 e2713e92 2004-04-24 devnull int framesep=1; /* distance between frame and surrounding text */
26 e2713e92 2004-04-24 devnull int outersep=1; /* distance: surrounding text to screen edge */
27 e2713e92 2004-04-24 devnull Point sdigit; /* size of a digit in the font */
28 e2713e92 2004-04-24 devnull Point smaxch; /* assume any character in font fits in this */
29 e2713e92 2004-04-24 devnull double underscan = .05; /* fraction of frame initially unused per side */
30 e2713e92 2004-04-24 devnull double fuzz = 6; /* selection tolerance in pixels */
31 e2713e92 2004-04-24 devnull int tick_len = 15; /* length of axis label tick mark in pixels */
32 e2713e92 2004-04-24 devnull FILE* logfil = 0; /* dump selected points here if nonzero */
34 e2713e92 2004-04-24 devnull #define labdigs 3 /* allow this many sig digits in axis labels */
35 e2713e92 2004-04-24 devnull #define digs10pow 1000 /* pow(10,labdigs) */
36 e2713e92 2004-04-24 devnull #define axis_color clr_im(DLtblue)
41 e2713e92 2004-04-24 devnull /********************************* Utilities *********************************/
43 e2713e92 2004-04-24 devnull /* Prepend string s to null-terminated string in n-byte buffer buf[], truncating if
44 e2713e92 2004-04-24 devnull necessary and using a space to separate s from the rest of buf[].
46 e2713e92 2004-04-24 devnull char* str_insert(char* buf, char* s, int n)
48 e2713e92 2004-04-24 devnull int blen, slen = strlen(s) + 1;
49 e2713e92 2004-04-24 devnull if (slen >= n)
50 e2713e92 2004-04-24 devnull {strncpy(buf,s,n); buf[n-1]='\0'; return buf;}
51 e2713e92 2004-04-24 devnull blen = strlen(buf);
52 e2713e92 2004-04-24 devnull if (blen >= n-slen)
53 e2713e92 2004-04-24 devnull buf[blen=n-slen-1] = '\0';
54 e2713e92 2004-04-24 devnull memmove(buf+slen, buf, slen+blen+1);
55 e2713e92 2004-04-24 devnull memcpy(buf, s, slen-1);
56 e2713e92 2004-04-24 devnull buf[slen-1] = ' ';
57 e2713e92 2004-04-24 devnull return buf;
60 e2713e92 2004-04-24 devnull /* Alter string smain (without lengthening it) so as to remove the first occurrence of
61 e2713e92 2004-04-24 devnull ssub, assuming ssub is ASCII. Return nonzero (true) if string smain had to be changed.
62 e2713e92 2004-04-24 devnull In spite of the ASCII-centric appearance, I think this can handle UTF in smain.
64 e2713e92 2004-04-24 devnull int remove_substr(char* smain, char* ssub)
66 e2713e92 2004-04-24 devnull char *ss, *s = strstr(smain, ssub);
67 e2713e92 2004-04-24 devnull int n = strlen(ssub);
68 e2713e92 2004-04-24 devnull if (s==0)
69 e2713e92 2004-04-24 devnull return 0;
70 e2713e92 2004-04-24 devnull if (islower(s[n]))
71 e2713e92 2004-04-24 devnull s[0] ^= 32; /* probably tolower(s[0]) or toupper(s[0]) */
73 e2713e92 2004-04-24 devnull for (ss=s+n; *ss!=0; s++, ss++)
74 e2713e92 2004-04-24 devnull *s = *ss;
75 e2713e92 2004-04-24 devnull *s = '\0';
77 e2713e92 2004-04-24 devnull return 1;
80 e2713e92 2004-04-24 devnull void adjust_border(Font* f)
82 e2713e92 2004-04-24 devnull int sep = framesep + outersep;
83 e2713e92 2004-04-24 devnull sdigit = stringsize(f, "8");
84 e2713e92 2004-04-24 devnull smaxch = stringsize(f, "MMMg");
85 e2713e92 2004-04-24 devnull smaxch.x = (smaxch.x + 3)/4;
86 e2713e92 2004-04-24 devnull lft_border0 = (1+labdigs)*sdigit.x + framewd + sep;
87 e2713e92 2004-04-24 devnull rt_border = (lft_border0 - sep)/2 + outersep;
88 e2713e92 2004-04-24 devnull bot_border = sdigit.y + framewd + sep;
89 e2713e92 2004-04-24 devnull top_border = smaxch.y + framewd + sep;
90 e2713e92 2004-04-24 devnull lft_border = lft_border0; /* this gets reset later */
94 e2713e92 2004-04-24 devnull int is_off_screen(Point p)
96 e2713e92 2004-04-24 devnull const Rectangle* r = &(screen->r);
97 e2713e92 2004-04-24 devnull return p.x-r->min.x<lft_border || r->max.x-p.x<rt_border
98 e2713e92 2004-04-24 devnull || p.y-r->min.y<=top_border || r->max.y-p.y<=bot_border;
102 e2713e92 2004-04-24 devnull Cursor bullseye =
104 e2713e92 2004-04-24 devnull {-7, -7},
106 e2713e92 2004-04-24 devnull 0x1F, 0xF8, 0x3F, 0xFC, 0x7F, 0xFE, 0xFB, 0xDF,
107 e2713e92 2004-04-24 devnull 0xF3, 0xCF, 0xE3, 0xC7, 0xFF, 0xFF, 0xFF, 0xFF,
108 e2713e92 2004-04-24 devnull 0xFF, 0xFF, 0xFF, 0xFF, 0xE3, 0xC7, 0xF3, 0xCF,
109 e2713e92 2004-04-24 devnull 0x7B, 0xDF, 0x7F, 0xFE, 0x3F, 0xFC, 0x1F, 0xF8,
112 e2713e92 2004-04-24 devnull 0x00, 0x00, 0x0F, 0xF0, 0x31, 0x8C, 0x21, 0x84,
113 e2713e92 2004-04-24 devnull 0x41, 0x82, 0x41, 0x82, 0x41, 0x82, 0x7F, 0xFE,
114 e2713e92 2004-04-24 devnull 0x7F, 0xFE, 0x41, 0x82, 0x41, 0x82, 0x41, 0x82,
115 e2713e92 2004-04-24 devnull 0x21, 0x84, 0x31, 0x8C, 0x0F, 0xF0, 0x00, 0x00,
119 e2713e92 2004-04-24 devnull int get_1click(int but, Mouse* m, Cursor* curs)
121 e2713e92 2004-04-24 devnull if (curs)
122 e2713e92 2004-04-24 devnull esetcursor(curs);
123 e2713e92 2004-04-24 devnull while (m->buttons==0)
124 e2713e92 2004-04-24 devnull *m = emouse();
125 e2713e92 2004-04-24 devnull if (curs)
126 e2713e92 2004-04-24 devnull esetcursor(0);
127 e2713e92 2004-04-24 devnull return (m->buttons==Button_bit(but));
131 e2713e92 2004-04-24 devnull /* Wait until but goes up or until a mouse event's msec passes tlimit.
132 e2713e92 2004-04-24 devnull Return a boolean result that tells whether the button went up.
134 e2713e92 2004-04-24 devnull int lift_button(int but, Mouse* m, int tlimit)
136 e2713e92 2004-04-24 devnull do { *m = emouse();
137 e2713e92 2004-04-24 devnull if (m->msec >= tlimit)
138 e2713e92 2004-04-24 devnull return 0;
139 e2713e92 2004-04-24 devnull } while (m->buttons & Button_bit(but));
140 e2713e92 2004-04-24 devnull return 1;
144 e2713e92 2004-04-24 devnull /* Set *m to the last pending mouse event, or the first one where but is up.
145 e2713e92 2004-04-24 devnull If no mouse events are pending, wait for the next one.
147 e2713e92 2004-04-24 devnull void latest_mouse(int but, Mouse* m)
149 e2713e92 2004-04-24 devnull int bbit = Button_bit(but);
150 e2713e92 2004-04-24 devnull do { *m = emouse();
151 e2713e92 2004-04-24 devnull } while ((m->buttons & bbit) && ecanmouse());
156 e2713e92 2004-04-24 devnull /*********************************** Colors ***********************************/
158 e2713e92 2004-04-24 devnull enum { DOrange=0xffaa00FF, Dgray=0xbbbbbbFF, DDkgreen=0x009900FF,
159 e2713e92 2004-04-24 devnull DDkred=0xcc0000FF, DViolet=0x990099FF, DDkyellow=0xaaaa00FF,
160 e2713e92 2004-04-24 devnull DLtblue=0xaaaaffFF, DPink=0xffaaaaFF,
161 e2713e92 2004-04-24 devnull /* ndraw.h sets DBlack, DBlue, DRed, DYellow, DGreen,
162 e2713e92 2004-04-24 devnull DCyan, DMagenta, DWhite */
165 e2713e92 2004-04-24 devnull typedef struct color_ref {
166 e2713e92 2004-04-24 devnull ulong c; /* RGBA pixel color */
167 e2713e92 2004-04-24 devnull char* nam; /* ASCII name (matched to input, used in output)*/
168 e2713e92 2004-04-24 devnull Image* im; /* replicated solid-color image */
169 e2713e92 2004-04-24 devnull } color_ref;
171 e2713e92 2004-04-24 devnull color_ref clrtab[] = {
172 e2713e92 2004-04-24 devnull DRed, "Red", 0,
173 e2713e92 2004-04-24 devnull DPink, "Pink", 0,
174 e2713e92 2004-04-24 devnull DDkred, "Dkred", 0,
175 e2713e92 2004-04-24 devnull DOrange, "Orange", 0,
176 e2713e92 2004-04-24 devnull DYellow, "Yellow", 0,
177 e2713e92 2004-04-24 devnull DDkyellow, "Dkyellow", 0,
178 e2713e92 2004-04-24 devnull DGreen, "Green", 0,
179 e2713e92 2004-04-24 devnull DDkgreen, "Dkgreen", 0,
180 e2713e92 2004-04-24 devnull DCyan, "Cyan", 0,
181 e2713e92 2004-04-24 devnull DBlue, "Blue", 0,
182 e2713e92 2004-04-24 devnull DLtblue, "Ltblue", 0,
183 e2713e92 2004-04-24 devnull DMagenta, "Magenta", 0,
184 e2713e92 2004-04-24 devnull DViolet, "Violet", 0,
185 e2713e92 2004-04-24 devnull Dgray, "Gray", 0,
186 e2713e92 2004-04-24 devnull DBlack, "Black", 0,
187 e2713e92 2004-04-24 devnull DWhite, "White", 0,
188 e2713e92 2004-04-24 devnull DNofill, 0, 0 /* DNofill means "end of data" */
192 e2713e92 2004-04-24 devnull void init_clrtab(void)
195 e2713e92 2004-04-24 devnull Rectangle r = Rect(0,0,1,1);
196 e2713e92 2004-04-24 devnull for (i=0; clrtab[i].c!=DNofill; i++)
197 e2713e92 2004-04-24 devnull clrtab[i].im = allocimage(display, r, CMAP8, 1, clrtab[i].c);
198 e2713e92 2004-04-24 devnull /* should check for 0 result? */
202 e2713e92 2004-04-24 devnull int clrim_id(Image* clr)
205 e2713e92 2004-04-24 devnull for (i=0; clrtab[i].im!=clr; i++)
206 e2713e92 2004-04-24 devnull if (clrtab[i].c==DNofill)
207 e2713e92 2004-04-24 devnull exits("bad image color");
208 e2713e92 2004-04-24 devnull return i;
211 e2713e92 2004-04-24 devnull int clr_id(int clr)
214 e2713e92 2004-04-24 devnull for (i=0; clrtab[i].c!=clr; i++)
215 e2713e92 2004-04-24 devnull if (clrtab[i].c==DNofill)
216 e2713e92 2004-04-24 devnull exits("bad color");
217 e2713e92 2004-04-24 devnull return i;
220 e2713e92 2004-04-24 devnull #define clr_im(clr) clrtab[clr_id(clr)].im
223 e2713e92 2004-04-24 devnull /* This decides what color to use for a polyline based on the label it has in the
224 e2713e92 2004-04-24 devnull input file. Whichever color name comes first is the winner, otherwise return black.
226 e2713e92 2004-04-24 devnull Image* nam2clr(const char* nam, int *idxdest)
228 e2713e92 2004-04-24 devnull char *c, *cbest=(char*)nam;
229 e2713e92 2004-04-24 devnull int i, ibest=-1;
230 e2713e92 2004-04-24 devnull if (*nam!=0)
231 e2713e92 2004-04-24 devnull for (i=0; clrtab[i].nam!=0; i++) {
232 e2713e92 2004-04-24 devnull c = strstr(nam,clrtab[i].nam);
233 e2713e92 2004-04-24 devnull if (c!=0 && (ibest<0 || c<cbest))
234 e2713e92 2004-04-24 devnull {ibest=i; cbest=c;}
236 e2713e92 2004-04-24 devnull if (idxdest!=0)
237 e2713e92 2004-04-24 devnull *idxdest = (ibest<0) ? clr_id(DBlack) : ibest;
238 e2713e92 2004-04-24 devnull return (ibest<0) ? clr_im(DBlack) : clrtab[ibest].im;
241 e2713e92 2004-04-24 devnull /* A polyline is initial drawn in thick mode iff its label in the file contains "Thick" */
242 e2713e92 2004-04-24 devnull int nam2thick(const char* nam)
244 e2713e92 2004-04-24 devnull return strstr(nam,"Thick")==0 ? 0 : 1;
248 e2713e92 2004-04-24 devnull /* Alter string nam so that nam2thick() and nam2clr() agree with th and clr, using
249 e2713e92 2004-04-24 devnull buf[] (a buffer of length bufn) to store the result if it differs from nam.
250 e2713e92 2004-04-24 devnull We go to great pains to perform this alteration in a manner that will seem natural
251 e2713e92 2004-04-24 devnull to the user, i.e., we try removing a suitably isolated color name before inserting
252 e2713e92 2004-04-24 devnull a new one.
254 e2713e92 2004-04-24 devnull char* nam_with_thclr(char* nam, int th, Image* clr, char* buf, int bufn)
256 e2713e92 2004-04-24 devnull int clr0i, th0=nam2thick(nam);
257 e2713e92 2004-04-24 devnull Image* clr0 = nam2clr(nam, &clr0i);
258 e2713e92 2004-04-24 devnull char *clr0s;
259 e2713e92 2004-04-24 devnull if (th0==th && clr0==clr)
260 e2713e92 2004-04-24 devnull return nam;
261 e2713e92 2004-04-24 devnull clr0s = clrtab[clr0i].nam;
262 e2713e92 2004-04-24 devnull if (strlen(nam)<bufn) strcpy(buf,nam);
263 e2713e92 2004-04-24 devnull else {strncpy(buf,nam,bufn); buf[bufn-1]='\0';}
264 e2713e92 2004-04-24 devnull if (clr0 != clr)
265 e2713e92 2004-04-24 devnull remove_substr(buf, clr0s);
266 e2713e92 2004-04-24 devnull if (th0 > th)
267 e2713e92 2004-04-24 devnull while (remove_substr(buf, "Thick"))
268 e2713e92 2004-04-24 devnull /* do nothing */;
269 e2713e92 2004-04-24 devnull if (nam2clr(buf,0) != clr)
270 e2713e92 2004-04-24 devnull str_insert(buf, clrtab[clrim_id(clr)].nam, bufn);
271 e2713e92 2004-04-24 devnull if (th0 < th)
272 e2713e92 2004-04-24 devnull str_insert(buf, "Thick", bufn);
273 e2713e92 2004-04-24 devnull return buf;
278 e2713e92 2004-04-24 devnull /****************************** Data structures ******************************/
280 e2713e92 2004-04-24 devnull Image* mv_bkgd; /* Background image (usually 0) */
282 e2713e92 2004-04-24 devnull typedef struct fpoint {
283 e2713e92 2004-04-24 devnull double x, y;
284 e2713e92 2004-04-24 devnull } fpoint;
286 e2713e92 2004-04-24 devnull typedef struct frectangle {
287 e2713e92 2004-04-24 devnull fpoint min, max;
288 e2713e92 2004-04-24 devnull } frectangle;
290 e2713e92 2004-04-24 devnull frectangle empty_frect = {1e30, 1e30, -1e30, -1e30};
293 e2713e92 2004-04-24 devnull /* When *r2 is transformed by y=y-x*slant, might it intersect *r1 ?
295 e2713e92 2004-04-24 devnull int fintersects(const frectangle* r1, const frectangle* r2, double slant)
297 e2713e92 2004-04-24 devnull double x2min=r2->min.x, x2max=r2->max.x;
298 e2713e92 2004-04-24 devnull if (r1->max.x <= x2min || x2max <= r1->min.x)
299 e2713e92 2004-04-24 devnull return 0;
300 e2713e92 2004-04-24 devnull if (slant >=0)
301 e2713e92 2004-04-24 devnull {x2min*=slant; x2max*=slant;}
302 e2713e92 2004-04-24 devnull else {double t=x2min*slant; x2min=x2max*slant; x2max=t;}
303 e2713e92 2004-04-24 devnull return r1->max.y > r2->min.y-x2max && r2->max.y-x2min > r1->min.y;
306 e2713e92 2004-04-24 devnull int fcontains(const frectangle* r, fpoint p)
308 e2713e92 2004-04-24 devnull return r->min.x <=p.x && p.x<= r->max.x && r->min.y <=p.y && p.y<= r->max.y;
312 e2713e92 2004-04-24 devnull void grow_bb(frectangle* dest, const frectangle* r)
314 e2713e92 2004-04-24 devnull if (r->min.x < dest->min.x) dest->min.x=r->min.x;
315 e2713e92 2004-04-24 devnull if (r->min.y < dest->min.y) dest->min.y=r->min.y;
316 e2713e92 2004-04-24 devnull if (r->max.x > dest->max.x) dest->max.x=r->max.x;
317 e2713e92 2004-04-24 devnull if (r->max.y > dest->max.y) dest->max.y=r->max.y;
321 e2713e92 2004-04-24 devnull void slant_frect(frectangle *r, double sl)
323 e2713e92 2004-04-24 devnull r->min.y += sl*r->min.x;
324 e2713e92 2004-04-24 devnull r->max.y += sl*r->max.x;
328 e2713e92 2004-04-24 devnull fpoint fcenter(const frectangle* r)
330 e2713e92 2004-04-24 devnull fpoint c;
331 e2713e92 2004-04-24 devnull c.x = .5*(r->max.x + r->min.x);
332 e2713e92 2004-04-24 devnull c.y = .5*(r->max.y + r->min.y);
333 e2713e92 2004-04-24 devnull return c;
337 e2713e92 2004-04-24 devnull typedef struct fpolygon {
338 e2713e92 2004-04-24 devnull fpoint* p; /* a malloc'ed array */
339 e2713e92 2004-04-24 devnull int n; /* p[] has n elements: p[0..n] */
340 e2713e92 2004-04-24 devnull frectangle bb; /* bounding box */
341 e2713e92 2004-04-24 devnull char* nam; /* name of this polygon (malloc'ed) */
342 e2713e92 2004-04-24 devnull int thick; /* use 1+2*thick pixel wide lines */
343 e2713e92 2004-04-24 devnull Image* clr; /* Color to use when drawing this */
344 e2713e92 2004-04-24 devnull struct fpolygon* link;
345 e2713e92 2004-04-24 devnull } fpolygon;
347 e2713e92 2004-04-24 devnull typedef struct fpolygons {
348 e2713e92 2004-04-24 devnull fpolygon* p; /* the head of a linked list */
349 e2713e92 2004-04-24 devnull frectangle bb; /* overall bounding box */
350 e2713e92 2004-04-24 devnull frectangle disp; /* part being mapped onto screen->r */
351 e2713e92 2004-04-24 devnull double slant_ht; /* controls how disp is slanted */
352 e2713e92 2004-04-24 devnull } fpolygons;
355 e2713e92 2004-04-24 devnull fpolygons univ = { /* everything there is to display */
357 e2713e92 2004-04-24 devnull 1e30, 1e30, -1e30, -1e30,
358 e2713e92 2004-04-24 devnull 0, 0, 0, 0,
363 e2713e92 2004-04-24 devnull void set_default_clrs(fpolygons* fps, fpolygon* fpstop)
365 e2713e92 2004-04-24 devnull fpolygon* fp;
366 e2713e92 2004-04-24 devnull for (fp=fps->p; fp!=0 && fp!=fpstop; fp=fp->link) {
367 e2713e92 2004-04-24 devnull fp->clr = nam2clr(fp->nam,0);
368 e2713e92 2004-04-24 devnull fp->thick = nam2thick(fp->nam);
373 e2713e92 2004-04-24 devnull void fps_invert(fpolygons* fps)
375 e2713e92 2004-04-24 devnull fpolygon *p, *r=0;
376 e2713e92 2004-04-24 devnull for (p=fps->p; p!=0;) {
377 e2713e92 2004-04-24 devnull fpolygon* q = p;
378 e2713e92 2004-04-24 devnull p = p->link;
379 e2713e92 2004-04-24 devnull q->link = r;
382 e2713e92 2004-04-24 devnull fps->p = r;
386 e2713e92 2004-04-24 devnull void fp_remove(fpolygons* fps, fpolygon* fp)
388 e2713e92 2004-04-24 devnull fpolygon *q, **p = &fps->p;
389 e2713e92 2004-04-24 devnull while (*p!=fp)
390 e2713e92 2004-04-24 devnull if (*p==0)
392 e2713e92 2004-04-24 devnull else p = &(*p)->link;
393 e2713e92 2004-04-24 devnull *p = fp->link;
394 e2713e92 2004-04-24 devnull fps->bb = empty_frect;
395 e2713e92 2004-04-24 devnull for (q=fps->p; q!=0; q=q->link)
396 e2713e92 2004-04-24 devnull grow_bb(&fps->bb, &q->bb);
400 e2713e92 2004-04-24 devnull /* The transform maps abstract fpoint coordinates (the ones used in the input)
401 e2713e92 2004-04-24 devnull to the current screen coordinates. The do_untransform() macros reverses this.
402 e2713e92 2004-04-24 devnull If univ.slant_ht is not the height of univ.disp, the actual region in the
403 e2713e92 2004-04-24 devnull abstract coordinates is a parallelogram inscribed in univ.disp with two
404 e2713e92 2004-04-24 devnull vertical edges and two slanted slanted edges: slant_ht>0 means that the
405 e2713e92 2004-04-24 devnull vertical edges have height slant_ht and the parallelogram touches the lower
406 e2713e92 2004-04-24 devnull left and upper right corners of univ.disp; slant_ht<0 refers to a parallelogram
407 e2713e92 2004-04-24 devnull of height -slant_ht that touches the other two corners of univ.disp.
408 e2713e92 2004-04-24 devnull NOTE: the ytransform macro assumes that tr->sl times the x coordinate has
409 e2713e92 2004-04-24 devnull already been subtracted from yy.
411 e2713e92 2004-04-24 devnull typedef struct transform {
412 e2713e92 2004-04-24 devnull double sl;
413 e2713e92 2004-04-24 devnull fpoint o, sc; /* (x,y):->(o.x+sc.x*x, o.y+sc.y*y+sl*x) */
414 e2713e92 2004-04-24 devnull } transform;
416 e2713e92 2004-04-24 devnull #define do_transform(d,tr,s) ((d)->x = (tr)->o.x + (tr)->sc.x*(s)->x, \
417 e2713e92 2004-04-24 devnull (d)->y = (tr)->o.y + (tr)->sc.y*(s)->y \
418 e2713e92 2004-04-24 devnull + (tr)->sl*(s)->x)
419 e2713e92 2004-04-24 devnull #define do_untransform(d,tr,s) ((d)->x = (.5+(s)->x-(tr)->o.x)/(tr)->sc.x, \
420 e2713e92 2004-04-24 devnull (d)->y = (.5+(s)->y-(tr)->sl*(d)->x-(tr)->o.y) \
421 e2713e92 2004-04-24 devnull /(tr)->sc.y)
422 e2713e92 2004-04-24 devnull #define xtransform(tr,xx) ((tr)->o.x + (tr)->sc.x*(xx))
423 e2713e92 2004-04-24 devnull #define ytransform(tr,yy) ((tr)->o.y + (tr)->sc.y*(yy))
424 e2713e92 2004-04-24 devnull #define dxuntransform(tr,xx) ((xx)/(tr)->sc.x)
425 e2713e92 2004-04-24 devnull #define dyuntransform(tr,yy) ((yy)/(tr)->sc.y)
428 e2713e92 2004-04-24 devnull transform cur_trans(void)
430 e2713e92 2004-04-24 devnull transform t;
431 e2713e92 2004-04-24 devnull Rectangle d = screen->r;
432 e2713e92 2004-04-24 devnull const frectangle* s = &univ.disp;
433 e2713e92 2004-04-24 devnull double sh = univ.slant_ht;
434 e2713e92 2004-04-24 devnull d.min.x += lft_border;
435 e2713e92 2004-04-24 devnull d.min.y += top_border;
436 e2713e92 2004-04-24 devnull d.max.x -= rt_border;
437 e2713e92 2004-04-24 devnull d.max.y -= bot_border;
438 e2713e92 2004-04-24 devnull t.sc.x = (d.max.x - d.min.x)/(s->max.x - s->min.x);
439 e2713e92 2004-04-24 devnull t.sc.y = -(d.max.y - d.min.y)/fabs(sh);
440 e2713e92 2004-04-24 devnull if (sh > 0) {
441 e2713e92 2004-04-24 devnull t.sl = -t.sc.y*(s->max.y-s->min.y-sh)/(s->max.x - s->min.x);
442 e2713e92 2004-04-24 devnull t.o.y = d.min.y - t.sc.y*s->max.y - t.sl*s->max.x;
443 e2713e92 2004-04-24 devnull } else {
444 e2713e92 2004-04-24 devnull t.sl = t.sc.y*(s->max.y-s->min.y+sh)/(s->max.x - s->min.x);
445 e2713e92 2004-04-24 devnull t.o.y = d.min.y - t.sc.y*s->max.y - t.sl*s->min.x;
447 e2713e92 2004-04-24 devnull t.o.x = d.min.x - t.sc.x*s->min.x;
448 e2713e92 2004-04-24 devnull return t;
452 e2713e92 2004-04-24 devnull double u_slant_amt(fpolygons *u)
454 e2713e92 2004-04-24 devnull double sh=u->slant_ht, dy=u->disp.max.y - u->disp.min.y;
455 e2713e92 2004-04-24 devnull double dx = u->disp.max.x - u->disp.min.x;
456 e2713e92 2004-04-24 devnull return (sh>0) ? (dy-sh)/dx : -(dy+sh)/dx;
460 e2713e92 2004-04-24 devnull /* Set *y0 and *y1 to the lower and upper bounds of the set of y-sl*x values that
461 e2713e92 2004-04-24 devnull *u says to display, where sl is the amount of slant.
463 e2713e92 2004-04-24 devnull double set_unslanted_y(fpolygons *u, double *y0, double *y1)
465 e2713e92 2004-04-24 devnull double yy1, sl=u_slant_amt(u);
466 e2713e92 2004-04-24 devnull if (u->slant_ht > 0) {
467 e2713e92 2004-04-24 devnull *y0 = u->disp.min.y - sl*u->disp.min.x;
468 e2713e92 2004-04-24 devnull yy1 = *y0 + u->slant_ht;
469 e2713e92 2004-04-24 devnull } else {
470 e2713e92 2004-04-24 devnull yy1 = u->disp.max.y - sl*u->disp.min.x;
471 e2713e92 2004-04-24 devnull *y0 = yy1 + u->slant_ht;
473 e2713e92 2004-04-24 devnull if (y1 != 0)
474 e2713e92 2004-04-24 devnull *y1 = yy1;
475 e2713e92 2004-04-24 devnull return sl;
481 e2713e92 2004-04-24 devnull /*************************** The region to display ****************************/
483 e2713e92 2004-04-24 devnull void nontrivial_interval(double *lo, double *hi)
485 e2713e92 2004-04-24 devnull if (*lo >= *hi) {
486 e2713e92 2004-04-24 devnull double mid = .5*(*lo + *hi);
487 e2713e92 2004-04-24 devnull double tweak = 1e-6 + 1e-6*fabs(mid);
488 e2713e92 2004-04-24 devnull *lo = mid - tweak;
489 e2713e92 2004-04-24 devnull *hi = mid + tweak;
494 e2713e92 2004-04-24 devnull void init_disp(void)
496 e2713e92 2004-04-24 devnull double dw = (univ.bb.max.x - univ.bb.min.x)*underscan;
497 e2713e92 2004-04-24 devnull double dh = (univ.bb.max.y - univ.bb.min.y)*underscan;
498 e2713e92 2004-04-24 devnull univ.disp.min.x = univ.bb.min.x - dw;
499 e2713e92 2004-04-24 devnull univ.disp.min.y = univ.bb.min.y - dh;
500 e2713e92 2004-04-24 devnull univ.disp.max.x = univ.bb.max.x + dw;
501 e2713e92 2004-04-24 devnull univ.disp.max.y = univ.bb.max.y + dh;
502 e2713e92 2004-04-24 devnull nontrivial_interval(&univ.disp.min.x, &univ.disp.max.x);
503 e2713e92 2004-04-24 devnull nontrivial_interval(&univ.disp.min.y, &univ.disp.max.y);
504 e2713e92 2004-04-24 devnull univ.slant_ht = univ.disp.max.y - univ.disp.min.y; /* means no slant */
508 e2713e92 2004-04-24 devnull void recenter_disp(Point c)
510 e2713e92 2004-04-24 devnull transform tr = cur_trans();
511 e2713e92 2004-04-24 devnull fpoint cc, off;
512 e2713e92 2004-04-24 devnull do_untransform(&cc, &tr, &c);
513 e2713e92 2004-04-24 devnull off.x = cc.x - .5*(univ.disp.min.x + univ.disp.max.x);
514 e2713e92 2004-04-24 devnull off.y = cc.y - .5*(univ.disp.min.y + univ.disp.max.y);
515 e2713e92 2004-04-24 devnull univ.disp.min.x += off.x;
516 e2713e92 2004-04-24 devnull univ.disp.min.y += off.y;
517 e2713e92 2004-04-24 devnull univ.disp.max.x += off.x;
518 e2713e92 2004-04-24 devnull univ.disp.max.y += off.y;
522 e2713e92 2004-04-24 devnull /* Find the upper-left and lower-right corners of the bounding box of the
523 e2713e92 2004-04-24 devnull parallelogram formed by untransforming the rectangle rminx, rminy, ... (given
524 e2713e92 2004-04-24 devnull in screen coordinates), and return the height of the parallelogram (negated
525 e2713e92 2004-04-24 devnull if it slopes downward).
527 e2713e92 2004-04-24 devnull double untransform_corners(double rminx, double rminy, double rmaxx, double rmaxy,
528 e2713e92 2004-04-24 devnull fpoint *ul, fpoint *lr)
530 e2713e92 2004-04-24 devnull fpoint r_ur, r_ul, r_ll, r_lr; /* corners of the given recangle */
531 e2713e92 2004-04-24 devnull fpoint ur, ll; /* untransformed versions of r_ur, r_ll */
532 e2713e92 2004-04-24 devnull transform tr = cur_trans();
533 e2713e92 2004-04-24 devnull double ht;
534 e2713e92 2004-04-24 devnull r_ur.x=rmaxx; r_ur.y=rminy;
535 e2713e92 2004-04-24 devnull r_ul.x=rminx; r_ul.y=rminy;
536 e2713e92 2004-04-24 devnull r_ll.x=rminx; r_ll.y=rmaxy;
537 e2713e92 2004-04-24 devnull r_lr.x=rmaxx; r_lr.y=rmaxy;
538 e2713e92 2004-04-24 devnull do_untransform(ul, &tr, &r_ul);
539 e2713e92 2004-04-24 devnull do_untransform(lr, &tr, &r_lr);
540 e2713e92 2004-04-24 devnull do_untransform(&ur, &tr, &r_ur);
541 e2713e92 2004-04-24 devnull do_untransform(&ll, &tr, &r_ll);
542 e2713e92 2004-04-24 devnull ht = ur.y - lr->y;
543 e2713e92 2004-04-24 devnull if (ll.x < ul->x)
544 e2713e92 2004-04-24 devnull ul->x = ll.x;
545 e2713e92 2004-04-24 devnull if (ur.y > ul->y)
546 e2713e92 2004-04-24 devnull ul->y = ur.y;
547 e2713e92 2004-04-24 devnull else ht = -ht;
548 e2713e92 2004-04-24 devnull if (ur.x > lr->x)
549 e2713e92 2004-04-24 devnull lr->x = ur.x;
550 e2713e92 2004-04-24 devnull if (ll.y < lr->y)
551 e2713e92 2004-04-24 devnull lr->y = ll.y;
552 e2713e92 2004-04-24 devnull return ht;
556 e2713e92 2004-04-24 devnull void disp_dozoom(double rminx, double rminy, double rmaxx, double rmaxy)
558 e2713e92 2004-04-24 devnull fpoint ul, lr;
559 e2713e92 2004-04-24 devnull double sh = untransform_corners(rminx, rminy, rmaxx, rmaxy, &ul, &lr);
560 e2713e92 2004-04-24 devnull if (ul.x==lr.x || ul.y==lr.y)
562 e2713e92 2004-04-24 devnull univ.slant_ht = sh;
563 e2713e92 2004-04-24 devnull univ.disp.min.x = ul.x;
564 e2713e92 2004-04-24 devnull univ.disp.max.y = ul.y;
565 e2713e92 2004-04-24 devnull univ.disp.max.x = lr.x;
566 e2713e92 2004-04-24 devnull univ.disp.min.y = lr.y;
567 e2713e92 2004-04-24 devnull nontrivial_interval(&univ.disp.min.x, &univ.disp.max.x);
568 e2713e92 2004-04-24 devnull nontrivial_interval(&univ.disp.min.y, &univ.disp.max.y);
572 e2713e92 2004-04-24 devnull void disp_zoomin(Rectangle r)
574 e2713e92 2004-04-24 devnull disp_dozoom(r.min.x, r.min.y, r.max.x, r.max.y);
578 e2713e92 2004-04-24 devnull void disp_zoomout(Rectangle r)
580 e2713e92 2004-04-24 devnull double qminx, qminy, qmaxx, qmaxy;
581 e2713e92 2004-04-24 devnull double scx, scy;
582 e2713e92 2004-04-24 devnull Rectangle s = screen->r;
583 e2713e92 2004-04-24 devnull if (r.min.x==r.max.x || r.min.y==r.max.y)
585 e2713e92 2004-04-24 devnull s.min.x += lft_border;
586 e2713e92 2004-04-24 devnull s.min.y += top_border;
587 e2713e92 2004-04-24 devnull s.max.x -= rt_border;
588 e2713e92 2004-04-24 devnull s.max.y -= bot_border;
589 e2713e92 2004-04-24 devnull scx = (s.max.x - s.min.x)/(r.max.x - r.min.x);
590 e2713e92 2004-04-24 devnull scy = (s.max.y - s.min.y)/(r.max.y - r.min.y);
591 e2713e92 2004-04-24 devnull qminx = s.min.x + scx*(s.min.x - r.min.x);
592 e2713e92 2004-04-24 devnull qmaxx = s.max.x + scx*(s.max.x - r.max.x);
593 e2713e92 2004-04-24 devnull qminy = s.min.y + scy*(s.min.y - r.min.y);
594 e2713e92 2004-04-24 devnull qmaxy = s.max.y + scy*(s.max.y - r.max.y);
595 e2713e92 2004-04-24 devnull disp_dozoom(qminx, qminy, qmaxx, qmaxy);
599 e2713e92 2004-04-24 devnull void expand2(double* a, double* b, double f)
601 e2713e92 2004-04-24 devnull double mid = .5*(*a + *b);
602 e2713e92 2004-04-24 devnull *a = mid + f*(*a - mid);
603 e2713e92 2004-04-24 devnull *b = mid + f*(*b - mid);
606 e2713e92 2004-04-24 devnull void disp_squareup(void)
608 e2713e92 2004-04-24 devnull double dx = univ.disp.max.x - univ.disp.min.x;
609 e2713e92 2004-04-24 devnull double dy = univ.disp.max.y - univ.disp.min.y;
610 e2713e92 2004-04-24 devnull dx /= screen->r.max.x - lft_border - screen->r.min.x - rt_border;
611 e2713e92 2004-04-24 devnull dy /= screen->r.max.y - bot_border - screen->r.min.y - top_border;
612 e2713e92 2004-04-24 devnull if (dx > dy)
613 e2713e92 2004-04-24 devnull expand2(&univ.disp.min.y, &univ.disp.max.y, dx/dy);
614 e2713e92 2004-04-24 devnull else expand2(&univ.disp.min.x, &univ.disp.max.x, dy/dx);
615 e2713e92 2004-04-24 devnull univ.slant_ht = univ.disp.max.y - univ.disp.min.y;
619 e2713e92 2004-04-24 devnull /* Slant so that p and q appear at the same height on the screen and the
620 e2713e92 2004-04-24 devnull screen contains the smallest possible superset of what its previous contents.
622 e2713e92 2004-04-24 devnull void slant_disp(fpoint p, fpoint q)
624 e2713e92 2004-04-24 devnull double yll, ylr, yul, yur; /* corner y coords of displayed parallelogram */
625 e2713e92 2004-04-24 devnull double sh, dy;
626 e2713e92 2004-04-24 devnull if (p.x == q.x)
628 e2713e92 2004-04-24 devnull sh = univ.slant_ht;
629 e2713e92 2004-04-24 devnull if (sh > 0) {
630 e2713e92 2004-04-24 devnull yll=yul=univ.disp.min.y; yul+=sh;
631 e2713e92 2004-04-24 devnull ylr=yur=univ.disp.max.y; ylr-=sh;
632 e2713e92 2004-04-24 devnull } else {
633 e2713e92 2004-04-24 devnull yll=yul=univ.disp.max.y; yll+=sh;
634 e2713e92 2004-04-24 devnull ylr=yur=univ.disp.min.y; yur-=sh;
636 e2713e92 2004-04-24 devnull dy = (univ.disp.max.x-univ.disp.min.x)*(q.y - p.y)/(q.x - p.x);
637 e2713e92 2004-04-24 devnull dy -= ylr - yll;
638 e2713e92 2004-04-24 devnull if (dy > 0)
639 e2713e92 2004-04-24 devnull {yll-=dy; yur+=dy;}
640 e2713e92 2004-04-24 devnull else {yul-=dy; ylr+=dy;}
641 e2713e92 2004-04-24 devnull if (ylr > yll) {
642 e2713e92 2004-04-24 devnull univ.disp.min.y = yll;
643 e2713e92 2004-04-24 devnull univ.disp.max.y = yur;
644 e2713e92 2004-04-24 devnull univ.slant_ht = yur - ylr;
645 e2713e92 2004-04-24 devnull } else {
646 e2713e92 2004-04-24 devnull univ.disp.max.y = yul;
647 e2713e92 2004-04-24 devnull univ.disp.min.y = ylr;
648 e2713e92 2004-04-24 devnull univ.slant_ht = ylr - yur;
655 e2713e92 2004-04-24 devnull /******************************** Ascii input ********************************/
657 e2713e92 2004-04-24 devnull void set_fbb(fpolygon* fp)
659 e2713e92 2004-04-24 devnull fpoint lo=fp->p[0], hi=fp->p[0];
660 e2713e92 2004-04-24 devnull const fpoint *q, *qtop;
661 e2713e92 2004-04-24 devnull for (qtop=(q=fp->p)+fp->n; ++q<=qtop;) {
662 e2713e92 2004-04-24 devnull if (q->x < lo.x) lo.x=q->x;
663 e2713e92 2004-04-24 devnull if (q->y < lo.y) lo.y=q->y;
664 e2713e92 2004-04-24 devnull if (q->x > hi.x) hi.x=q->x;
665 e2713e92 2004-04-24 devnull if (q->y > hi.y) hi.y=q->y;
667 e2713e92 2004-04-24 devnull fp->bb.min = lo;
668 e2713e92 2004-04-24 devnull fp->bb.max = hi;
671 e2713e92 2004-04-24 devnull char* mystrdup(char* s)
673 e2713e92 2004-04-24 devnull char *r, *t = strrchr(s,'"');
674 e2713e92 2004-04-24 devnull if (t==0) {
675 e2713e92 2004-04-24 devnull t = s + strlen(s);
676 e2713e92 2004-04-24 devnull while (t>s && (t[-1]=='\n' || t[-1]=='\r'))
679 e2713e92 2004-04-24 devnull r = malloc(1+(t-s));
680 e2713e92 2004-04-24 devnull memcpy(r, s, t-s);
681 e2713e92 2004-04-24 devnull r[t-s] = 0;
682 e2713e92 2004-04-24 devnull return r;
685 e2713e92 2004-04-24 devnull int is_valid_label(char* lab)
687 e2713e92 2004-04-24 devnull char* t;
688 e2713e92 2004-04-24 devnull if (lab[0]=='"')
689 e2713e92 2004-04-24 devnull return (t=strrchr(lab,'"'))!=0 && t!=lab && strspn(t+1," \t\r\n")==strlen(t+1);
690 e2713e92 2004-04-24 devnull return strcspn(lab," \t")==strlen(lab);
693 e2713e92 2004-04-24 devnull /* Read a polyline and update the number of lines read. A zero result indicates bad
694 e2713e92 2004-04-24 devnull syntax if *lineno increases; otherwise it indicates end of file.
696 e2713e92 2004-04-24 devnull fpolygon* rd_fpoly(FILE* fin, int *lineno)
698 e2713e92 2004-04-24 devnull char buf[256], junk[2];
699 e2713e92 2004-04-24 devnull fpoint q;
700 e2713e92 2004-04-24 devnull fpolygon* fp;
701 e2713e92 2004-04-24 devnull int allocn;
702 e2713e92 2004-04-24 devnull if (!fgets(buf,256,fin))
703 e2713e92 2004-04-24 devnull return 0;
704 e2713e92 2004-04-24 devnull (*lineno)++;
705 e2713e92 2004-04-24 devnull if (sscanf(buf,"%lg%lg%1s",&q.x,&q.y,junk) != 2)
706 e2713e92 2004-04-24 devnull return 0;
707 e2713e92 2004-04-24 devnull fp = malloc(sizeof(fpolygon));
708 e2713e92 2004-04-24 devnull allocn = 16;
709 e2713e92 2004-04-24 devnull fp->p = malloc(allocn*sizeof(fpoint));
710 e2713e92 2004-04-24 devnull fp->p[0] = q;
711 e2713e92 2004-04-24 devnull fp->n = 0;
712 e2713e92 2004-04-24 devnull fp->nam = "";
713 e2713e92 2004-04-24 devnull fp->thick = 0;
714 e2713e92 2004-04-24 devnull fp->clr = clr_im(DBlack);
715 e2713e92 2004-04-24 devnull while (fgets(buf,256,fin)) {
716 e2713e92 2004-04-24 devnull (*lineno)++;
717 e2713e92 2004-04-24 devnull if (sscanf(buf,"%lg%lg%1s",&q.x,&q.y,junk) != 2) {
718 e2713e92 2004-04-24 devnull if (!is_valid_label(buf))
719 e2713e92 2004-04-24 devnull {free(fp->p); free(fp); return 0;}
720 e2713e92 2004-04-24 devnull fp->nam = (buf[0]=='"') ? buf+1 : buf;
723 e2713e92 2004-04-24 devnull if (++(fp->n) == allocn)
724 e2713e92 2004-04-24 devnull fp->p = realloc(fp->p, (allocn<<=1)*sizeof(fpoint));
725 e2713e92 2004-04-24 devnull fp->p[fp->n] = q;
727 e2713e92 2004-04-24 devnull fp->nam = mystrdup(fp->nam);
728 e2713e92 2004-04-24 devnull set_fbb(fp);
729 e2713e92 2004-04-24 devnull fp->link = 0;
730 e2713e92 2004-04-24 devnull return fp;
734 e2713e92 2004-04-24 devnull /* Read input into *fps and return 0 or a line number where there's a syntax error */
735 e2713e92 2004-04-24 devnull int rd_fpolys(FILE* fin, fpolygons* fps)
737 e2713e92 2004-04-24 devnull fpolygon *fp, *fp0=fps->p;
738 e2713e92 2004-04-24 devnull int lineno=0, ok_upto=0;
739 e2713e92 2004-04-24 devnull while ((fp=rd_fpoly(fin,&lineno)) != 0) {
740 e2713e92 2004-04-24 devnull ok_upto = lineno;
741 e2713e92 2004-04-24 devnull fp->link = fps->p;
742 e2713e92 2004-04-24 devnull fps->p = fp;
743 e2713e92 2004-04-24 devnull grow_bb(&fps->bb, &fp->bb);
745 e2713e92 2004-04-24 devnull set_default_clrs(fps, fp0);
746 e2713e92 2004-04-24 devnull return (ok_upto==lineno) ? 0 : lineno;
750 e2713e92 2004-04-24 devnull /* Read input from file fnam and return an error line no., -1 for "can't open"
751 e2713e92 2004-04-24 devnull or 0 for success.
753 e2713e92 2004-04-24 devnull int doinput(char* fnam)
755 e2713e92 2004-04-24 devnull FILE* fin = strcmp(fnam,"-")==0 ? stdin : fopen(fnam, "r");
756 e2713e92 2004-04-24 devnull int errline_or0;
757 e2713e92 2004-04-24 devnull if (fin==0)
758 e2713e92 2004-04-24 devnull return -1;
759 e2713e92 2004-04-24 devnull errline_or0 = rd_fpolys(fin, &univ);
760 e2713e92 2004-04-24 devnull fclose(fin);
761 e2713e92 2004-04-24 devnull return errline_or0;
766 e2713e92 2004-04-24 devnull /******************************** Ascii output ********************************/
768 e2713e92 2004-04-24 devnull fpolygon* fp_reverse(fpolygon* fp)
770 e2713e92 2004-04-24 devnull fpolygon* r = 0;
771 e2713e92 2004-04-24 devnull while (fp!=0) {
772 e2713e92 2004-04-24 devnull fpolygon* q = fp->link;
773 e2713e92 2004-04-24 devnull fp->link = r;
777 e2713e92 2004-04-24 devnull return r;
780 e2713e92 2004-04-24 devnull void wr_fpoly(FILE* fout, const fpolygon* fp)
782 e2713e92 2004-04-24 devnull char buf[256];
784 e2713e92 2004-04-24 devnull for (i=0; i<=fp->n; i++)
785 e2713e92 2004-04-24 devnull fprintf(fout,"%.12g\t%.12g\n", fp->p[i].x, fp->p[i].y);
786 e2713e92 2004-04-24 devnull fprintf(fout,"\"%s\"\n", nam_with_thclr(fp->nam, fp->thick, fp->clr, buf, 256));
789 e2713e92 2004-04-24 devnull void wr_fpolys(FILE* fout, fpolygons* fps)
791 e2713e92 2004-04-24 devnull fpolygon* fp;
792 e2713e92 2004-04-24 devnull fps->p = fp_reverse(fps->p);
793 e2713e92 2004-04-24 devnull for (fp=fps->p; fp!=0; fp=fp->link)
794 e2713e92 2004-04-24 devnull wr_fpoly(fout, fp);
795 e2713e92 2004-04-24 devnull fps->p = fp_reverse(fps->p);
799 e2713e92 2004-04-24 devnull int dooutput(char* fnam)
801 e2713e92 2004-04-24 devnull FILE* fout = fopen(fnam, "w");
802 e2713e92 2004-04-24 devnull if (fout==0)
803 e2713e92 2004-04-24 devnull return 0;
804 e2713e92 2004-04-24 devnull wr_fpolys(fout, &univ);
805 e2713e92 2004-04-24 devnull fclose(fout);
806 e2713e92 2004-04-24 devnull return 1;
812 e2713e92 2004-04-24 devnull /************************ Clipping to screen rectangle ************************/
814 e2713e92 2004-04-24 devnull /* Find the t values, 0<=t<=1 for which x0+t*(x1-x0) is between xlo and xhi,
815 e2713e92 2004-04-24 devnull or return 0 to indicate no such t values exist. If returning 1, set *t0 and
816 e2713e92 2004-04-24 devnull *t1 to delimit the t interval.
818 e2713e92 2004-04-24 devnull int do_xory(double x0, double x1, double xlo, double xhi, double* t0, double* t1)
820 e2713e92 2004-04-24 devnull *t1 = 1.0;
821 e2713e92 2004-04-24 devnull if (x0<xlo) {
822 e2713e92 2004-04-24 devnull if (x1<xlo) return 0;
823 e2713e92 2004-04-24 devnull *t0 = (xlo-x0)/(x1-x0);
824 e2713e92 2004-04-24 devnull if (x1>xhi) *t1 = (xhi-x0)/(x1-x0);
825 e2713e92 2004-04-24 devnull } else if (x0>xhi) {
826 e2713e92 2004-04-24 devnull if (x1>xhi) return 0;
827 e2713e92 2004-04-24 devnull *t0 = (xhi-x0)/(x1-x0);
828 e2713e92 2004-04-24 devnull if (x1<xlo) *t1 = (xlo-x0)/(x1-x0);
829 e2713e92 2004-04-24 devnull } else {
830 e2713e92 2004-04-24 devnull *t0 = 0.0;
831 e2713e92 2004-04-24 devnull if (x1>xhi) *t1 = (xhi-x0)/(x1-x0);
832 e2713e92 2004-04-24 devnull else if (x1<xlo) *t1 = (xlo-x0)/(x1-x0);
833 e2713e92 2004-04-24 devnull else *t1 = 1.0;
835 e2713e92 2004-04-24 devnull return 1;
839 e2713e92 2004-04-24 devnull /* After mapping y to y-slope*x, what initial fraction of the *p to *q edge is
840 e2713e92 2004-04-24 devnull outside of *r? Note that the edge could start outside *r, pass through *r,
841 e2713e92 2004-04-24 devnull and wind up outside again.
843 e2713e92 2004-04-24 devnull double frac_outside(const fpoint* p, const fpoint* q, const frectangle* r,
844 e2713e92 2004-04-24 devnull double slope)
846 e2713e92 2004-04-24 devnull double t0, t1, tt0, tt1;
847 e2713e92 2004-04-24 devnull double px=p->x, qx=q->x;
848 e2713e92 2004-04-24 devnull if (!do_xory(px, qx, r->min.x, r->max.x, &t0, &t1))
849 e2713e92 2004-04-24 devnull return 1;
850 e2713e92 2004-04-24 devnull if (!do_xory(p->y-slope*px, q->y-slope*qx, r->min.y, r->max.y, &tt0, &tt1))
851 e2713e92 2004-04-24 devnull return 1;
852 e2713e92 2004-04-24 devnull if (tt0 > t0)
853 e2713e92 2004-04-24 devnull t0 = tt0;
854 e2713e92 2004-04-24 devnull if (t1<=t0 || tt1<=t0)
855 e2713e92 2004-04-24 devnull return 1;
856 e2713e92 2004-04-24 devnull return t0;
860 e2713e92 2004-04-24 devnull /* Think of p0..pn as piecewise-linear function F(t) for t=0..pn-p0, and find
861 e2713e92 2004-04-24 devnull the maximum tt such that F(0..tt) is all inside of r, assuming p0 is inside.
862 e2713e92 2004-04-24 devnull Coordinates are transformed by y=y-x*slope before testing against r.
864 e2713e92 2004-04-24 devnull double in_length(const fpoint* p0, const fpoint* pn, frectangle r, double slope)
866 e2713e92 2004-04-24 devnull const fpoint* p = p0;
867 e2713e92 2004-04-24 devnull double px, py;
868 e2713e92 2004-04-24 devnull do if (++p > pn)
869 e2713e92 2004-04-24 devnull return pn - p0;
870 e2713e92 2004-04-24 devnull while (r.min.x<=(px=p->x) && px<=r.max.x
871 e2713e92 2004-04-24 devnull && r.min.y<=(py=p->y-slope*px) && py<=r.max.y);
872 e2713e92 2004-04-24 devnull return (p - p0) - frac_outside(p, p-1, &r, slope);
876 e2713e92 2004-04-24 devnull /* Think of p0..pn as piecewise-linear function F(t) for t=0..pn-p0, and find
877 e2713e92 2004-04-24 devnull the maximum tt such that F(0..tt) is all outside of *r. Coordinates are
878 e2713e92 2004-04-24 devnull transformed by y=y-x*slope before testing against r.
880 e2713e92 2004-04-24 devnull double out_length(const fpoint* p0, const fpoint* pn, frectangle r, double slope)
882 e2713e92 2004-04-24 devnull const fpoint* p = p0;
883 e2713e92 2004-04-24 devnull double fr;
884 e2713e92 2004-04-24 devnull do { if (p->x < r.min.x)
885 e2713e92 2004-04-24 devnull do if (++p>pn) return pn-p0;
886 e2713e92 2004-04-24 devnull while (p->x <= r.min.x);
887 e2713e92 2004-04-24 devnull else if (p->x > r.max.x)
888 e2713e92 2004-04-24 devnull do if (++p>pn) return pn-p0;
889 e2713e92 2004-04-24 devnull while (p->x >= r.max.x);
890 e2713e92 2004-04-24 devnull else if (p->y-slope*p->x < r.min.y)
891 e2713e92 2004-04-24 devnull do if (++p>pn) return pn-p0;
892 e2713e92 2004-04-24 devnull while (p->y-slope*p->x <= r.min.y);
893 e2713e92 2004-04-24 devnull else if (p->y-slope*p->x > r.max.y)
894 e2713e92 2004-04-24 devnull do if (++p>pn) return pn-p0;
895 e2713e92 2004-04-24 devnull while (p->y-slope*p->x >= r.max.y);
896 e2713e92 2004-04-24 devnull else return p - p0;
897 e2713e92 2004-04-24 devnull } while ((fr=frac_outside(p-1,p,&r,slope)) == 1);
898 e2713e92 2004-04-24 devnull return (p - p0) + fr-1;
903 e2713e92 2004-04-24 devnull /*********************** Drawing frame and axis labels ***********************/
905 e2713e92 2004-04-24 devnull #define Nthous 7
906 e2713e92 2004-04-24 devnull #define Len_thous 30 /* bound on strlen(thous_nam[i]) */
907 e2713e92 2004-04-24 devnull char* thous_nam[Nthous] = {
908 e2713e92 2004-04-24 devnull "one", "thousand", "million", "billion",
909 e2713e92 2004-04-24 devnull "trillion", "quadrillion", "quintillion",
913 e2713e92 2004-04-24 devnull typedef struct lab_interval {
914 e2713e92 2004-04-24 devnull double sep; /* separation between tick marks */
915 e2713e92 2004-04-24 devnull double unit; /* power of 1000 divisor */
916 e2713e92 2004-04-24 devnull int logunit; /* log base 1000 of of this divisor */
917 e2713e92 2004-04-24 devnull double off; /* offset to subtract before dividing */
918 e2713e92 2004-04-24 devnull } lab_interval;
921 e2713e92 2004-04-24 devnull char* abbrev_num(double x, const lab_interval* iv)
923 e2713e92 2004-04-24 devnull static char buf[16];
924 e2713e92 2004-04-24 devnull double dx = x - iv->off;
925 e2713e92 2004-04-24 devnull dx = iv->sep * floor(dx/iv->sep + .5);
926 e2713e92 2004-04-24 devnull sprintf(buf,"%g", dx/iv->unit);
927 e2713e92 2004-04-24 devnull return buf;
931 e2713e92 2004-04-24 devnull double lead_digits(double n, double r) /* n truncated to power of 10 above r */
933 e2713e92 2004-04-24 devnull double rr = pow(10, ceil(log10(r)));
934 e2713e92 2004-04-24 devnull double nn = (n<rr) ? 0.0 : rr*floor(n/rr);
935 e2713e92 2004-04-24 devnull if (n+r-nn >= digs10pow) {
936 e2713e92 2004-04-24 devnull rr /= 10;
937 e2713e92 2004-04-24 devnull nn = (n<rr) ? 0.0 : rr*floor(n/rr);
939 e2713e92 2004-04-24 devnull return nn;
943 e2713e92 2004-04-24 devnull lab_interval next_larger(double s0, double xlo, double xhi)
945 e2713e92 2004-04-24 devnull double nlo, nhi;
946 e2713e92 2004-04-24 devnull lab_interval r;
947 e2713e92 2004-04-24 devnull r.logunit = (int) floor(log10(s0) + LOG2);
948 e2713e92 2004-04-24 devnull r.unit = pow(10, r.logunit);
949 e2713e92 2004-04-24 devnull nlo = xlo/r.unit;
950 e2713e92 2004-04-24 devnull nhi = xhi/r.unit;
951 e2713e92 2004-04-24 devnull if (nhi >= digs10pow)
952 e2713e92 2004-04-24 devnull r.off = r.unit*lead_digits(nlo, nhi-nlo);
953 e2713e92 2004-04-24 devnull else if (nlo <= -digs10pow)
954 e2713e92 2004-04-24 devnull r.off = -r.unit*lead_digits(-nhi, nhi-nlo);
955 e2713e92 2004-04-24 devnull else r.off = 0;
956 e2713e92 2004-04-24 devnull r.sep = (s0<=r.unit) ? r.unit : (s0<2*r.unit ? 2*r.unit : 5*r.unit);
957 e2713e92 2004-04-24 devnull switch (r.logunit%3) {
958 e2713e92 2004-04-24 devnull case 1: r.unit*=.1; r.logunit--;
960 e2713e92 2004-04-24 devnull case -1: case 2:
961 e2713e92 2004-04-24 devnull r.unit*=10; r.logunit++;
963 e2713e92 2004-04-24 devnull case -2: r.unit*=100; r.logunit+=2;
965 e2713e92 2004-04-24 devnull r.logunit /= 3;
966 e2713e92 2004-04-24 devnull return r;
970 e2713e92 2004-04-24 devnull double min_hsep(const transform* tr)
972 e2713e92 2004-04-24 devnull double s = (2+labdigs)*sdigit.x;
973 e2713e92 2004-04-24 devnull double ss = (univ.disp.min.x<0) ? s+sdigit.x : s;
974 e2713e92 2004-04-24 devnull return dxuntransform(tr, ss);
978 e2713e92 2004-04-24 devnull lab_interval mark_x_axis(const transform* tr)
980 e2713e92 2004-04-24 devnull fpoint p = univ.disp.min;
981 e2713e92 2004-04-24 devnull Point q, qtop, qbot, tmp;
982 e2713e92 2004-04-24 devnull double x0=univ.disp.min.x, x1=univ.disp.max.x;
983 e2713e92 2004-04-24 devnull double seps0, nseps, seps;
984 e2713e92 2004-04-24 devnull lab_interval iv = next_larger(min_hsep(tr), x0, x1);
985 e2713e92 2004-04-24 devnull set_unslanted_y(&univ, &p.y, 0);
986 e2713e92 2004-04-24 devnull q.y = ytransform(tr, p.y) + .5;
987 e2713e92 2004-04-24 devnull qtop.y = q.y - tick_len;
988 e2713e92 2004-04-24 devnull qbot.y = q.y + framewd + framesep;
989 e2713e92 2004-04-24 devnull seps0 = ceil(x0/iv.sep);
990 e2713e92 2004-04-24 devnull for (seps=0, nseps=floor(x1/iv.sep)-seps0; seps<=nseps; seps+=1) {
991 e2713e92 2004-04-24 devnull char* num = abbrev_num((p.x=iv.sep*(seps0+seps)), &iv);
992 e2713e92 2004-04-24 devnull Font* f = display->defaultfont;
993 e2713e92 2004-04-24 devnull q.x = qtop.x = qbot.x = xtransform(tr, p.x);
994 e2713e92 2004-04-24 devnull line(screen, qtop, q, Enddisc, Enddisc, 0, axis_color, q);
995 e2713e92 2004-04-24 devnull tmp = stringsize(f, num);
996 e2713e92 2004-04-24 devnull qbot.x -= tmp.x/2;
997 e2713e92 2004-04-24 devnull string(screen, qbot, display->black, qbot, f, num);
999 e2713e92 2004-04-24 devnull return iv;
1003 e2713e92 2004-04-24 devnull lab_interval mark_y_axis(const transform* tr)
1005 e2713e92 2004-04-24 devnull Font* f = display->defaultfont;
1006 e2713e92 2004-04-24 devnull fpoint p = univ.disp.min;
1007 e2713e92 2004-04-24 devnull Point q, qrt, qlft;
1008 e2713e92 2004-04-24 devnull double y0, y1, seps0, nseps, seps;
1009 e2713e92 2004-04-24 devnull lab_interval iv;
1010 e2713e92 2004-04-24 devnull set_unslanted_y(&univ, &y0, &y1);
1011 e2713e92 2004-04-24 devnull iv = next_larger(dyuntransform(tr,-f->height), y0, y1);
1012 e2713e92 2004-04-24 devnull q.x = xtransform(tr, p.x) - .5;
1013 e2713e92 2004-04-24 devnull qrt.x = q.x + tick_len;
1014 e2713e92 2004-04-24 devnull qlft.x = q.x - (framewd + framesep);
1015 e2713e92 2004-04-24 devnull seps0 = ceil(y0/iv.sep);
1016 e2713e92 2004-04-24 devnull for (seps=0, nseps=floor(y1/iv.sep)-seps0; seps<=nseps; seps+=1) {
1017 e2713e92 2004-04-24 devnull char* num = abbrev_num((p.y=iv.sep*(seps0+seps)), &iv);
1018 e2713e92 2004-04-24 devnull Point qq = stringsize(f, num);
1019 e2713e92 2004-04-24 devnull q.y = qrt.y = qlft.y = ytransform(tr, p.y);
1020 e2713e92 2004-04-24 devnull line(screen, qrt, q, Enddisc, Enddisc, 0, axis_color, q);
1021 e2713e92 2004-04-24 devnull qq.x = qlft.x - qq.x;
1022 e2713e92 2004-04-24 devnull qq.y = qlft.y - qq.y/2;
1023 e2713e92 2004-04-24 devnull string(screen, qq, display->black, qq, f, num);
1025 e2713e92 2004-04-24 devnull return iv;
1029 e2713e92 2004-04-24 devnull void lab_iv_info(const lab_interval *iv, double slant, char* buf, int *n)
1031 e2713e92 2004-04-24 devnull if (iv->off > 0)
1032 e2713e92 2004-04-24 devnull (*n) += sprintf(buf+*n,"-%.12g",iv->off);
1033 e2713e92 2004-04-24 devnull else if (iv->off < 0)
1034 e2713e92 2004-04-24 devnull (*n) += sprintf(buf+*n,"+%.12g",-iv->off);
1035 e2713e92 2004-04-24 devnull if (slant>0)
1036 e2713e92 2004-04-24 devnull (*n) += sprintf(buf+*n,"-%.6gx", slant);
1037 e2713e92 2004-04-24 devnull else if (slant<0)
1038 e2713e92 2004-04-24 devnull (*n) += sprintf(buf+*n,"+%.6gx", -slant);
1039 e2713e92 2004-04-24 devnull if (abs(iv->logunit) >= Nthous)
1040 e2713e92 2004-04-24 devnull (*n) += sprintf(buf+*n," in 1e%d units", 3*iv->logunit);
1041 e2713e92 2004-04-24 devnull else if (iv->logunit > 0)
1042 e2713e92 2004-04-24 devnull (*n) += sprintf(buf+*n," in %ss", thous_nam[iv->logunit]);
1043 e2713e92 2004-04-24 devnull else if (iv->logunit < 0)
1044 e2713e92 2004-04-24 devnull (*n) += sprintf(buf+*n," in %sths", thous_nam[-iv->logunit]);
1048 e2713e92 2004-04-24 devnull void draw_xy_ranges(const lab_interval *xiv, const lab_interval *yiv)
1050 e2713e92 2004-04-24 devnull Point p;
1051 e2713e92 2004-04-24 devnull char buf[2*(19+Len_thous+8)+50];
1052 e2713e92 2004-04-24 devnull int bufn = 0;
1053 e2713e92 2004-04-24 devnull buf[bufn++] = 'x';
1054 e2713e92 2004-04-24 devnull lab_iv_info(xiv, 0, buf, &bufn);
1055 e2713e92 2004-04-24 devnull bufn += sprintf(buf+bufn, "; y");
1056 e2713e92 2004-04-24 devnull lab_iv_info(yiv, u_slant_amt(&univ), buf, &bufn);
1057 e2713e92 2004-04-24 devnull buf[bufn] = '\0';
1058 e2713e92 2004-04-24 devnull p = stringsize(display->defaultfont, buf);
1059 e2713e92 2004-04-24 devnull top_left = screen->r.min.x + lft_border;
1060 e2713e92 2004-04-24 devnull p.x = top_right = screen->r.max.x - rt_border - p.x;
1061 e2713e92 2004-04-24 devnull p.y = screen->r.min.y + outersep;
1062 e2713e92 2004-04-24 devnull string(screen, p, display->black, p, display->defaultfont, buf);
1066 e2713e92 2004-04-24 devnull transform draw_frame(void)
1068 e2713e92 2004-04-24 devnull lab_interval x_iv, y_iv;
1069 e2713e92 2004-04-24 devnull transform tr;
1070 e2713e92 2004-04-24 devnull Rectangle r = screen->r;
1071 e2713e92 2004-04-24 devnull lft_border = (univ.disp.min.y<0) ? lft_border0+sdigit.x : lft_border0;
1072 e2713e92 2004-04-24 devnull tr = cur_trans();
1073 e2713e92 2004-04-24 devnull r.min.x += lft_border;
1074 e2713e92 2004-04-24 devnull r.min.y += top_border;
1075 e2713e92 2004-04-24 devnull r.max.x -= rt_border;
1076 e2713e92 2004-04-24 devnull r.max.y -= bot_border;
1077 e2713e92 2004-04-24 devnull border(screen, r, -framewd, axis_color, r.min);
1078 e2713e92 2004-04-24 devnull x_iv = mark_x_axis(&tr);
1079 e2713e92 2004-04-24 devnull y_iv = mark_y_axis(&tr);
1080 e2713e92 2004-04-24 devnull draw_xy_ranges(&x_iv, &y_iv);
1081 e2713e92 2004-04-24 devnull return tr;
1086 e2713e92 2004-04-24 devnull /*************************** Finding the selection ***************************/
1088 e2713e92 2004-04-24 devnull typedef struct pt_on_fpoly {
1089 e2713e92 2004-04-24 devnull fpoint p; /* the point */
1090 e2713e92 2004-04-24 devnull fpolygon* fp; /* the fpolygon it lies on */
1091 e2713e92 2004-04-24 devnull double t; /* how many knots from the beginning */
1092 e2713e92 2004-04-24 devnull } pt_on_fpoly;
1095 e2713e92 2004-04-24 devnull static double myx, myy;
1096 e2713e92 2004-04-24 devnull #define mydist(p,o,sl,xwt,ywt) (myx=(p).x-(o).x, myy=(p).y-sl*(p).x-(o).y, \
1097 e2713e92 2004-04-24 devnull xwt*myx*myx + ywt*myy*myy)
1099 e2713e92 2004-04-24 devnull /* At what fraction of the way from p0[0] to p0[1] is mydist(p,ctr,slant,xwt,ywt)
1100 e2713e92 2004-04-24 devnull minimized?
1102 e2713e92 2004-04-24 devnull double closest_time(const fpoint* p0, const fpoint* ctr, double slant,
1103 e2713e92 2004-04-24 devnull double xwt, double ywt)
1105 e2713e92 2004-04-24 devnull double p00y=p0[0].y-slant*p0[0].x, p01y=p0[1].y-slant*p0[1].x;
1106 e2713e92 2004-04-24 devnull double dx=p0[1].x-p0[0].x, dy=p01y-p00y;
1107 e2713e92 2004-04-24 devnull double x0=p0[0].x-ctr->x, y0=p00y-ctr->y;
1108 e2713e92 2004-04-24 devnull double bot = xwt*dx*dx + ywt*dy*dy;
1109 e2713e92 2004-04-24 devnull if (bot==0)
1110 e2713e92 2004-04-24 devnull return 0;
1111 e2713e92 2004-04-24 devnull return -(xwt*x0*dx + ywt*y0*dy)/bot;
1115 e2713e92 2004-04-24 devnull /* Scan the polygonal path of length len knots starting at p0, and find the
1116 e2713e92 2004-04-24 devnull point that the transformation y=y-x*slant makes closest to the center of *r,
1117 e2713e92 2004-04-24 devnull where *r itself defines the distance metric. Knots get higher priority than
1118 e2713e92 2004-04-24 devnull points between knots. If psel->t is negative, always update *psel; otherwise
1119 e2713e92 2004-04-24 devnull update *psel only if the scan can improve it. Return a boolean that says
1120 e2713e92 2004-04-24 devnull whether *psel was updated.
1121 e2713e92 2004-04-24 devnull Note that *r is a very tiny rectangle (tiny when converted screen pixels)
1122 e2713e92 2004-04-24 devnull such that anything in *r is considered close enough to match the mouse click.
1123 e2713e92 2004-04-24 devnull The purpose of this routine is to be careful in case there is a lot of hidden
1124 e2713e92 2004-04-24 devnull detail in the tiny rectangle *r.
1126 e2713e92 2004-04-24 devnull int improve_pt(fpoint* p0, double len, const frectangle* r, double slant,
1127 e2713e92 2004-04-24 devnull pt_on_fpoly* psel)
1129 e2713e92 2004-04-24 devnull fpoint ctr = fcenter(r);
1130 e2713e92 2004-04-24 devnull double x_wt=2/(r->max.x-r->min.x), y_wt=2/(r->max.y-r->min.y);
1131 e2713e92 2004-04-24 devnull double xwt=x_wt*x_wt, ywt=y_wt*y_wt;
1132 e2713e92 2004-04-24 devnull double d, dbest = (psel->t <0) ? 1e30 : mydist(psel->p,ctr,slant,xwt,ywt);
1133 e2713e92 2004-04-24 devnull double tt, dbest0 = dbest;
1134 e2713e92 2004-04-24 devnull fpoint pp;
1135 e2713e92 2004-04-24 devnull int ilen = (int) len;
1136 e2713e92 2004-04-24 devnull if (len==0 || ilen>0) {
1138 e2713e92 2004-04-24 devnull for (i=(len==0 ? 0 : 1); i<=ilen; i++) {
1139 e2713e92 2004-04-24 devnull d = mydist(p0[i], ctr, slant, xwt, ywt);
1140 e2713e92 2004-04-24 devnull if (d < dbest)
1141 e2713e92 2004-04-24 devnull {psel->p=p0[i]; psel->t=i; dbest=d;}
1143 e2713e92 2004-04-24 devnull return (dbest < dbest0);
1145 e2713e92 2004-04-24 devnull tt = closest_time(p0, &ctr, slant, xwt, ywt);
1146 e2713e92 2004-04-24 devnull if (tt > len)
1147 e2713e92 2004-04-24 devnull tt = len;
1148 e2713e92 2004-04-24 devnull pp.x = p0[0].x + tt*(p0[1].x - p0[0].x);
1149 e2713e92 2004-04-24 devnull pp.y = p0[0].y + tt*(p0[1].y - p0[0].y);
1150 e2713e92 2004-04-24 devnull if (mydist(pp, ctr, slant, xwt, ywt) < dbest) {
1151 e2713e92 2004-04-24 devnull psel->p = pp;
1152 e2713e92 2004-04-24 devnull psel->t = tt;
1153 e2713e92 2004-04-24 devnull return 1;
1155 e2713e92 2004-04-24 devnull return 0;
1159 e2713e92 2004-04-24 devnull /* Test *fp against *r after transforming by y=y-x*slope, and set *psel accordingly.
1161 e2713e92 2004-04-24 devnull void select_in_fpoly(fpolygon* fp, const frectangle* r, double slant,
1162 e2713e92 2004-04-24 devnull pt_on_fpoly* psel)
1164 e2713e92 2004-04-24 devnull fpoint *p0=fp->p, *pn=fp->p+fp->n;
1165 e2713e92 2004-04-24 devnull double l1, l2;
1166 e2713e92 2004-04-24 devnull if (p0==pn)
1167 e2713e92 2004-04-24 devnull {improve_pt(p0, 0, r, slant, psel); psel->fp=fp; return;}
1168 e2713e92 2004-04-24 devnull while ((l1=out_length(p0,pn,*r,slant)) < pn-p0) {
1169 e2713e92 2004-04-24 devnull fpoint p0sav;
1170 e2713e92 2004-04-24 devnull int i1 = (int) l1;
1171 e2713e92 2004-04-24 devnull p0+=i1; l1-=i1;
1172 e2713e92 2004-04-24 devnull p0sav = *p0;
1173 e2713e92 2004-04-24 devnull p0[0].x += l1*(p0[1].x - p0[0].x);
1174 e2713e92 2004-04-24 devnull p0[0].y += l1*(p0[1].y - p0[0].y);
1175 e2713e92 2004-04-24 devnull l2 = in_length(p0, pn, *r, slant);
1176 e2713e92 2004-04-24 devnull if (improve_pt(p0, l2, r, slant, psel)) {
1177 e2713e92 2004-04-24 devnull if (l1==0 && psel->t!=((int) psel->t)) {
1178 e2713e92 2004-04-24 devnull psel->t = 0;
1179 e2713e92 2004-04-24 devnull psel->p = *p0;
1180 e2713e92 2004-04-24 devnull } else if (psel->t < 1)
1181 e2713e92 2004-04-24 devnull psel->t += l1*(1 - psel->t);
1182 e2713e92 2004-04-24 devnull psel->t += p0 - fp->p;
1183 e2713e92 2004-04-24 devnull psel->fp = fp;
1185 e2713e92 2004-04-24 devnull *p0 = p0sav;
1186 e2713e92 2004-04-24 devnull p0 += (l2>0) ? ((int) ceil(l2)) : 1;
1191 e2713e92 2004-04-24 devnull /* Test all the fpolygons against *r after transforming by y=y-x*slope, and return
1192 e2713e92 2004-04-24 devnull the resulting selection, if any.
1194 e2713e92 2004-04-24 devnull pt_on_fpoly* select_in_univ(const frectangle* r, double slant)
1196 e2713e92 2004-04-24 devnull static pt_on_fpoly answ;
1197 e2713e92 2004-04-24 devnull fpolygon* fp;
1198 e2713e92 2004-04-24 devnull answ.t = -1;
1199 e2713e92 2004-04-24 devnull for (fp=univ.p; fp!=0; fp=fp->link)
1200 e2713e92 2004-04-24 devnull if (fintersects(r, &fp->bb, slant))
1201 e2713e92 2004-04-24 devnull select_in_fpoly(fp, r, slant, &answ);
1202 e2713e92 2004-04-24 devnull if (answ.t < 0)
1203 e2713e92 2004-04-24 devnull return 0;
1204 e2713e92 2004-04-24 devnull return &answ;
1209 e2713e92 2004-04-24 devnull /**************************** Using the selection ****************************/
1211 e2713e92 2004-04-24 devnull pt_on_fpoly cur_sel; /* current selection if cur_sel.t>=0 */
1212 e2713e92 2004-04-24 devnull pt_on_fpoly prev_sel; /* previous selection if prev_sel.t>=0 (for slant) */
1213 e2713e92 2004-04-24 devnull Image* sel_bkg = 0; /* what's behind the red dot */
1216 e2713e92 2004-04-24 devnull void clear_txt(void)
1218 e2713e92 2004-04-24 devnull Rectangle r;
1219 e2713e92 2004-04-24 devnull r.min = screen->r.min;
1220 e2713e92 2004-04-24 devnull r.min.x += lft_border;
1221 e2713e92 2004-04-24 devnull r.min.y += outersep;
1222 e2713e92 2004-04-24 devnull r.max.x = top_left;
1223 e2713e92 2004-04-24 devnull r.max.y = r.min.y + smaxch.y;
1224 e2713e92 2004-04-24 devnull draw(screen, r, display->white, display->opaque, r.min);
1225 e2713e92 2004-04-24 devnull top_left = r.min.x;
1229 e2713e92 2004-04-24 devnull Rectangle sel_dot_box(const transform* tr)
1231 e2713e92 2004-04-24 devnull Point ctr;
1232 e2713e92 2004-04-24 devnull Rectangle r;
1233 e2713e92 2004-04-24 devnull if (tr==0)
1234 e2713e92 2004-04-24 devnull ctr.x = ctr.y = Dotrad;
1235 e2713e92 2004-04-24 devnull else do_transform(&ctr, tr, &cur_sel.p);
1236 e2713e92 2004-04-24 devnull r.min.x=ctr.x-Dotrad; r.max.x=ctr.x+Dotrad+1;
1237 e2713e92 2004-04-24 devnull r.min.y=ctr.y-Dotrad; r.max.y=ctr.y+Dotrad+1;
1238 e2713e92 2004-04-24 devnull return r;
1242 e2713e92 2004-04-24 devnull void unselect(const transform* tr)
1244 e2713e92 2004-04-24 devnull transform tra;
1245 e2713e92 2004-04-24 devnull if (sel_bkg==0)
1246 e2713e92 2004-04-24 devnull sel_bkg = allocimage(display, sel_dot_box(0), CMAP8, 0, DWhite);
1247 e2713e92 2004-04-24 devnull clear_txt();
1248 e2713e92 2004-04-24 devnull if (cur_sel.t < 0)
1249 e2713e92 2004-04-24 devnull return;
1250 e2713e92 2004-04-24 devnull prev_sel = cur_sel;
1251 e2713e92 2004-04-24 devnull if (tr==0)
1252 e2713e92 2004-04-24 devnull {tra=cur_trans(); tr=&tra;}
1253 e2713e92 2004-04-24 devnull draw(screen, sel_dot_box(tr), sel_bkg, display->opaque, ZP);
1254 e2713e92 2004-04-24 devnull cur_sel.t = -1;
1258 e2713e92 2004-04-24 devnull /* Text at top right is written first and this low-level routine clobbers it if
1259 e2713e92 2004-04-24 devnull the new top-left text would overwrite it. However, users of this routine should
1260 e2713e92 2004-04-24 devnull try to keep the new text short enough to avoid this.
1262 e2713e92 2004-04-24 devnull void show_mytext(char* msg)
1264 e2713e92 2004-04-24 devnull Point tmp, pt = screen->r.min;
1265 e2713e92 2004-04-24 devnull int siz;
1266 e2713e92 2004-04-24 devnull tmp = stringsize(display->defaultfont, msg);
1267 e2713e92 2004-04-24 devnull siz = tmp.x;
1268 e2713e92 2004-04-24 devnull pt.x=top_left; pt.y+=outersep;
1269 e2713e92 2004-04-24 devnull if (top_left+siz > top_right) {
1270 e2713e92 2004-04-24 devnull Rectangle r;
1271 e2713e92 2004-04-24 devnull r.min.y = pt.y;
1272 e2713e92 2004-04-24 devnull r.min.x = top_right;
1273 e2713e92 2004-04-24 devnull r.max.y = r.min.y + smaxch.y;
1274 e2713e92 2004-04-24 devnull r.max.x = top_left+siz;
1275 e2713e92 2004-04-24 devnull draw(screen, r, display->white, display->opaque, r.min);
1276 e2713e92 2004-04-24 devnull top_right = top_left+siz;
1278 e2713e92 2004-04-24 devnull string(screen, pt, display->black, ZP, display->defaultfont, msg);
1279 e2713e92 2004-04-24 devnull top_left += siz;
1283 e2713e92 2004-04-24 devnull double rnd(double x, double tol) /* round to enough digits for accuracy tol */
1285 e2713e92 2004-04-24 devnull double t = pow(10, floor(log10(tol)));
1286 e2713e92 2004-04-24 devnull return t * floor(x/t + .5);
1289 e2713e92 2004-04-24 devnull double t_tol(double xtol, double ytol)
1291 e2713e92 2004-04-24 devnull int t = (int) floor(cur_sel.t);
1292 e2713e92 2004-04-24 devnull fpoint* p = cur_sel.fp->p;
1293 e2713e92 2004-04-24 devnull double dx, dy;
1294 e2713e92 2004-04-24 devnull if (t==cur_sel.t)
1295 e2713e92 2004-04-24 devnull return 1;
1296 e2713e92 2004-04-24 devnull dx = fabs(p[t+1].x - p[t].x);
1297 e2713e92 2004-04-24 devnull dy = fabs(p[t+1].y - p[t].y);
1298 e2713e92 2004-04-24 devnull xtol /= (xtol>dx) ? xtol : dx;
1299 e2713e92 2004-04-24 devnull ytol /= (ytol>dy) ? ytol : dy;
1300 e2713e92 2004-04-24 devnull return (xtol<ytol) ? xtol : ytol;
1303 e2713e92 2004-04-24 devnull void say_where(const transform* tr)
1305 e2713e92 2004-04-24 devnull double xtol=dxuntransform(tr,1), ytol=dyuntransform(tr,-1);
1306 e2713e92 2004-04-24 devnull char buf[100];
1307 e2713e92 2004-04-24 devnull int n, nmax = (top_right - top_left)/smaxch.x;
1308 e2713e92 2004-04-24 devnull if (nmax >= 100)
1309 e2713e92 2004-04-24 devnull nmax = 100-1;
1310 e2713e92 2004-04-24 devnull n = sprintf(buf,"(%.14g,%.14g) at t=%.14g",
1311 e2713e92 2004-04-24 devnull rnd(cur_sel.p.x,xtol), rnd(cur_sel.p.y,ytol),
1312 e2713e92 2004-04-24 devnull rnd(cur_sel.t, t_tol(xtol,ytol)));
1313 e2713e92 2004-04-24 devnull if (cur_sel.fp->nam[0] != 0)
1314 e2713e92 2004-04-24 devnull sprintf(buf+n," %.*s", nmax-n-1, cur_sel.fp->nam);
1315 e2713e92 2004-04-24 devnull show_mytext(buf);
1319 e2713e92 2004-04-24 devnull void reselect(const transform* tr) /* uselect(); set cur_sel; call this */
1321 e2713e92 2004-04-24 devnull Point pt2, pt3;
1322 e2713e92 2004-04-24 devnull fpoint p2;
1323 e2713e92 2004-04-24 devnull transform tra;
1324 e2713e92 2004-04-24 devnull if (cur_sel.t < 0)
1325 e2713e92 2004-04-24 devnull return;
1326 e2713e92 2004-04-24 devnull if (tr==0)
1327 e2713e92 2004-04-24 devnull {tra=cur_trans(); tr=&tra;}
1328 e2713e92 2004-04-24 devnull do_transform(&p2, tr, &cur_sel.p);
1329 e2713e92 2004-04-24 devnull if (fabs(p2.x)+fabs(p2.y)>1e8 || (pt2.x=p2.x, pt2.y=p2.y, is_off_screen(pt2)))
1330 e2713e92 2004-04-24 devnull {cur_sel.t= -1; return;}
1331 e2713e92 2004-04-24 devnull pt3.x=pt2.x-Dotrad; pt3.y=pt2.y-Dotrad;
1332 e2713e92 2004-04-24 devnull draw(sel_bkg, sel_dot_box(0), screen, display->opaque, pt3);
1333 e2713e92 2004-04-24 devnull fillellipse(screen, pt2, Dotrad, Dotrad, clr_im(DRed), pt2);
1334 e2713e92 2004-04-24 devnull say_where(tr);
1338 e2713e92 2004-04-24 devnull void do_select(Point pt)
1340 e2713e92 2004-04-24 devnull transform tr = cur_trans();
1341 e2713e92 2004-04-24 devnull fpoint pt1, pt2, ctr;
1342 e2713e92 2004-04-24 devnull frectangle r;
1343 e2713e92 2004-04-24 devnull double slant;
1344 e2713e92 2004-04-24 devnull pt_on_fpoly* psel;
1345 e2713e92 2004-04-24 devnull unselect(&tr);
1346 e2713e92 2004-04-24 devnull do_untransform(&ctr, &tr, &pt);
1347 e2713e92 2004-04-24 devnull pt1.x=pt.x-fuzz; pt1.y=pt.y+fuzz;
1348 e2713e92 2004-04-24 devnull pt2.x=pt.x+fuzz; pt2.y=pt.y-fuzz;
1349 e2713e92 2004-04-24 devnull do_untransform(&r.min, &tr, &pt1);
1350 e2713e92 2004-04-24 devnull do_untransform(&r.max, &tr, &pt2);
1351 e2713e92 2004-04-24 devnull slant = u_slant_amt(&univ);
1352 e2713e92 2004-04-24 devnull slant_frect(&r, -slant);
1353 e2713e92 2004-04-24 devnull psel = select_in_univ(&r, slant);
1354 e2713e92 2004-04-24 devnull if (psel==0)
1355 e2713e92 2004-04-24 devnull return;
1356 e2713e92 2004-04-24 devnull if (logfil!=0) {
1357 e2713e92 2004-04-24 devnull fprintf(logfil,"%.14g\t%.14g\n", psel->p.x, psel->p.y);
1358 e2713e92 2004-04-24 devnull fflush(logfil);
1360 e2713e92 2004-04-24 devnull cur_sel = *psel;
1361 e2713e92 2004-04-24 devnull reselect(&tr);
1365 e2713e92 2004-04-24 devnull /***************************** Prompting for text *****************************/
1367 e2713e92 2004-04-24 devnull void unshow_mytext(char* msg)
1369 e2713e92 2004-04-24 devnull Rectangle r;
1370 e2713e92 2004-04-24 devnull Point siz = stringsize(display->defaultfont, msg);
1371 e2713e92 2004-04-24 devnull top_left -= siz.x;
1372 e2713e92 2004-04-24 devnull r.min.y = screen->r.min.y + outersep;
1373 e2713e92 2004-04-24 devnull r.min.x = top_left;
1374 e2713e92 2004-04-24 devnull r.max.y = r.min.y + siz.y;
1375 e2713e92 2004-04-24 devnull r.max.x = r.min.x + siz.x;
1376 e2713e92 2004-04-24 devnull draw(screen, r, display->white, display->opaque, r.min);
1380 e2713e92 2004-04-24 devnull /* Show the given prompt and read a line of user input. The text appears at the
1381 e2713e92 2004-04-24 devnull top left. If it runs into the top right text, we stop echoing but let the user
1382 e2713e92 2004-04-24 devnull continue typing blind if he wants to.
1384 e2713e92 2004-04-24 devnull char* prompt_text(char* prompt)
1386 e2713e92 2004-04-24 devnull static char buf[200];
1387 e2713e92 2004-04-24 devnull int n0, n=0, nshown=0;
1388 e2713e92 2004-04-24 devnull Rune c;
1389 e2713e92 2004-04-24 devnull unselect(0);
1390 e2713e92 2004-04-24 devnull show_mytext(prompt);
1391 e2713e92 2004-04-24 devnull while (n<200-1-UTFmax && (c=ekbd())!='\n') {
1392 e2713e92 2004-04-24 devnull if (c=='\b') {
1393 e2713e92 2004-04-24 devnull buf[n] = 0;
1394 e2713e92 2004-04-24 devnull if (n > 0)
1395 e2713e92 2004-04-24 devnull do n--;
1396 e2713e92 2004-04-24 devnull while (n>0 && (buf[n-1]&0xc0)==0x80);
1397 e2713e92 2004-04-24 devnull if (n < nshown)
1398 e2713e92 2004-04-24 devnull {unshow_mytext(buf+n); nshown=n;}
1399 e2713e92 2004-04-24 devnull } else {
1400 e2713e92 2004-04-24 devnull n0 = n;
1401 e2713e92 2004-04-24 devnull n += runetochar(buf+n, &c);
1402 e2713e92 2004-04-24 devnull buf[n] = 0;
1403 e2713e92 2004-04-24 devnull if (nshown==n0 && top_right-top_left >= smaxch.x)
1404 e2713e92 2004-04-24 devnull {show_mytext(buf+n0); nshown=n;}
1407 e2713e92 2004-04-24 devnull buf[n] = 0;
1408 e2713e92 2004-04-24 devnull while (ecanmouse())
1409 e2713e92 2004-04-24 devnull emouse();
1410 e2713e92 2004-04-24 devnull return buf;
1414 e2713e92 2004-04-24 devnull /**************************** Redrawing the screen ****************************/
1416 e2713e92 2004-04-24 devnull /* Let p0 and its successors define a piecewise-linear function of a paramter t,
1417 e2713e92 2004-04-24 devnull and draw the 0<=t<=n1 portion using transform *tr.
1419 e2713e92 2004-04-24 devnull void draw_fpts(const fpoint* p0, double n1, const transform* tr, int thick,
1420 e2713e92 2004-04-24 devnull Image* clr)
1422 e2713e92 2004-04-24 devnull int n = (int) n1;
1423 e2713e92 2004-04-24 devnull const fpoint* p = p0 + n;
1424 e2713e92 2004-04-24 devnull fpoint pp;
1425 e2713e92 2004-04-24 devnull Point qq, q;
1426 e2713e92 2004-04-24 devnull if (n1 > n) {
1427 e2713e92 2004-04-24 devnull pp.x = p[0].x + (n1-n)*(p[1].x - p[0].x);
1428 e2713e92 2004-04-24 devnull pp.y = p[0].y + (n1-n)*(p[1].y - p[0].y);
1429 e2713e92 2004-04-24 devnull } else pp = *p--;
1430 e2713e92 2004-04-24 devnull do_transform(&qq, tr, &pp);
1431 e2713e92 2004-04-24 devnull if (n1==0)
1432 e2713e92 2004-04-24 devnull fillellipse(screen, qq, 1+thick, 1+thick, clr, qq);
1433 e2713e92 2004-04-24 devnull for (; p>=p0; p--) {
1434 e2713e92 2004-04-24 devnull do_transform(&q, tr, p);
1435 e2713e92 2004-04-24 devnull line(screen, qq, q, Enddisc, Enddisc, thick, clr, qq);
1436 e2713e92 2004-04-24 devnull qq = q;
1440 e2713e92 2004-04-24 devnull void draw_1fpoly(const fpolygon* fp, const transform* tr, Image* clr,
1441 e2713e92 2004-04-24 devnull const frectangle *udisp, double slant)
1443 e2713e92 2004-04-24 devnull fpoint *p0=fp->p, *pn=fp->p+fp->n;
1444 e2713e92 2004-04-24 devnull double l1, l2;
1445 e2713e92 2004-04-24 devnull if (p0==pn && fcontains(udisp,*p0))
1446 e2713e92 2004-04-24 devnull {draw_fpts(p0, 0, tr, fp->thick, clr); return;}
1447 e2713e92 2004-04-24 devnull while ((l1=out_length(p0,pn,*udisp,slant)) < pn-p0) {
1448 e2713e92 2004-04-24 devnull fpoint p0sav;
1449 e2713e92 2004-04-24 devnull int i1 = (int) l1;
1450 e2713e92 2004-04-24 devnull p0+=i1; l1-=i1;
1451 e2713e92 2004-04-24 devnull p0sav = *p0;
1452 e2713e92 2004-04-24 devnull p0[0].x += l1*(p0[1].x - p0[0].x);
1453 e2713e92 2004-04-24 devnull p0[0].y += l1*(p0[1].y - p0[0].y);
1454 e2713e92 2004-04-24 devnull l2 = in_length(p0, pn, *udisp, slant);
1455 e2713e92 2004-04-24 devnull draw_fpts(p0, l2, tr, fp->thick, clr);
1456 e2713e92 2004-04-24 devnull *p0 = p0sav;
1457 e2713e92 2004-04-24 devnull p0 += (l2>0) ? ((int) ceil(l2)) : 1;
1462 e2713e92 2004-04-24 devnull double get_clip_data(const fpolygons *u, frectangle *r)
1464 e2713e92 2004-04-24 devnull double slant = set_unslanted_y((fpolygons*)u, &r->min.y, &r->max.y);
1465 e2713e92 2004-04-24 devnull r->min.x = u->disp.min.x;
1466 e2713e92 2004-04-24 devnull r->max.x = u->disp.max.x;
1467 e2713e92 2004-04-24 devnull return slant;
1471 e2713e92 2004-04-24 devnull void draw_fpoly(const fpolygon* fp, const transform* tr, Image* clr)
1473 e2713e92 2004-04-24 devnull frectangle r;
1474 e2713e92 2004-04-24 devnull double slant = get_clip_data(&univ, &r);
1475 e2713e92 2004-04-24 devnull draw_1fpoly(fp, tr, clr, &r, slant);
1479 e2713e92 2004-04-24 devnull void eresized(int new)
1481 e2713e92 2004-04-24 devnull transform tr;
1482 e2713e92 2004-04-24 devnull fpolygon* fp;
1483 e2713e92 2004-04-24 devnull frectangle clipr;
1484 e2713e92 2004-04-24 devnull double slant;
1485 e2713e92 2004-04-24 devnull if(new && getwindow(display, Refmesg) < 0) {
1486 e2713e92 2004-04-24 devnull fprintf(stderr,"can't reattach to window\n");
1487 e2713e92 2004-04-24 devnull exits("reshap");
1489 e2713e92 2004-04-24 devnull draw(screen, screen->r, display->white, display->opaque, screen->r.min);
1490 e2713e92 2004-04-24 devnull tr = draw_frame();
1491 e2713e92 2004-04-24 devnull slant = get_clip_data(&univ, &clipr);
1492 e2713e92 2004-04-24 devnull for (fp=univ.p; fp!=0; fp=fp->link)
1493 e2713e92 2004-04-24 devnull if (fintersects(&clipr, &fp->bb, slant))
1494 e2713e92 2004-04-24 devnull draw_1fpoly(fp, &tr, fp->clr, &clipr, slant);
1495 e2713e92 2004-04-24 devnull reselect(0);
1496 e2713e92 2004-04-24 devnull if (mv_bkgd!=0 && mv_bkgd->repl==0) {
1497 e2713e92 2004-04-24 devnull freeimage(mv_bkgd);
1498 e2713e92 2004-04-24 devnull mv_bkgd = display->white;
1500 e2713e92 2004-04-24 devnull flushimage(display, 1);
1506 e2713e92 2004-04-24 devnull /********************************* Recoloring *********************************/
1508 e2713e92 2004-04-24 devnull int draw_palette(int n) /* n is number of colors; returns patch dy */
1510 e2713e92 2004-04-24 devnull int y0 = screen->r.min.y + top_border;
1511 e2713e92 2004-04-24 devnull int dy = (screen->r.max.y - bot_border - y0)/n;
1512 e2713e92 2004-04-24 devnull Rectangle r;
1514 e2713e92 2004-04-24 devnull r.min.y = y0;
1515 e2713e92 2004-04-24 devnull r.min.x = screen->r.max.x - rt_border + framewd;
1516 e2713e92 2004-04-24 devnull r.max.y = y0 + dy;
1517 e2713e92 2004-04-24 devnull r.max.x = screen->r.max.x;
1518 e2713e92 2004-04-24 devnull for (i=0; i<n; i++) {
1519 e2713e92 2004-04-24 devnull draw(screen, r, clrtab[i].im, display->opaque, r.min);
1520 e2713e92 2004-04-24 devnull r.min.y = r.max.y;
1521 e2713e92 2004-04-24 devnull r.max.y += dy;
1523 e2713e92 2004-04-24 devnull return dy;
1527 e2713e92 2004-04-24 devnull Image* palette_color(Point pt, int dy, int n)
1528 e2713e92 2004-04-24 devnull { /* mouse at pt, patch size dy, n colors */
1529 e2713e92 2004-04-24 devnull int yy;
1530 e2713e92 2004-04-24 devnull if (screen->r.max.x - pt.x > rt_border - framewd)
1531 e2713e92 2004-04-24 devnull return 0;
1532 e2713e92 2004-04-24 devnull yy = pt.y - (screen->r.min.y + top_border);
1533 e2713e92 2004-04-24 devnull if (yy<0 || yy>=n*dy)
1534 e2713e92 2004-04-24 devnull return 0;
1535 e2713e92 2004-04-24 devnull return clrtab[yy/dy].im;
1539 e2713e92 2004-04-24 devnull void all_set_clr(fpolygons* fps, Image* clr)
1541 e2713e92 2004-04-24 devnull fpolygon* p;
1542 e2713e92 2004-04-24 devnull for (p=fps->p; p!=0; p=p->link)
1543 e2713e92 2004-04-24 devnull p->clr = clr;
1547 e2713e92 2004-04-24 devnull void do_recolor(int but, Mouse* m, int alluniv)
1549 e2713e92 2004-04-24 devnull int nclr = clr_id(DWhite);
1550 e2713e92 2004-04-24 devnull int dy = draw_palette(nclr);
1551 e2713e92 2004-04-24 devnull Image* clr;
1552 e2713e92 2004-04-24 devnull if (!get_1click(but, m, 0)) {
1553 e2713e92 2004-04-24 devnull eresized(0);
1554 e2713e92 2004-04-24 devnull return;
1556 e2713e92 2004-04-24 devnull clr = palette_color(m->xy, dy, nclr);
1557 e2713e92 2004-04-24 devnull if (clr != 0) {
1558 e2713e92 2004-04-24 devnull if (alluniv)
1559 e2713e92 2004-04-24 devnull all_set_clr(&univ, clr);
1560 e2713e92 2004-04-24 devnull else cur_sel.fp->clr = clr;
1562 e2713e92 2004-04-24 devnull eresized(0);
1563 e2713e92 2004-04-24 devnull lift_button(but, m, Never);
1567 e2713e92 2004-04-24 devnull /****************************** Move and rotate ******************************/
1569 e2713e92 2004-04-24 devnull void prepare_mv(const fpolygon* fp)
1571 e2713e92 2004-04-24 devnull Rectangle r = screen->r;
1572 e2713e92 2004-04-24 devnull Image* scr0;
1573 e2713e92 2004-04-24 devnull int dt = 1 + fp->thick;
1574 e2713e92 2004-04-24 devnull r.min.x+=lft_border-dt; r.min.y+=top_border-dt;
1575 e2713e92 2004-04-24 devnull r.max.x-=rt_border-dt; r.max.y-=bot_border-dt;
1576 e2713e92 2004-04-24 devnull if (mv_bkgd!=0 && mv_bkgd->repl==0)
1577 e2713e92 2004-04-24 devnull freeimage(mv_bkgd);
1578 e2713e92 2004-04-24 devnull mv_bkgd = allocimage(display, r, CMAP8, 0, DNofill);
1579 e2713e92 2004-04-24 devnull if (mv_bkgd==0)
1580 e2713e92 2004-04-24 devnull mv_bkgd = display->white;
1581 e2713e92 2004-04-24 devnull else { transform tr = cur_trans();
1582 e2713e92 2004-04-24 devnull draw(mv_bkgd, r, screen, display->opaque, r.min);
1583 e2713e92 2004-04-24 devnull draw(mv_bkgd, sel_dot_box(&tr), sel_bkg, display->opaque, ZP);
1584 e2713e92 2004-04-24 devnull scr0 = screen;
1585 e2713e92 2004-04-24 devnull screen = mv_bkgd;
1586 e2713e92 2004-04-24 devnull draw_fpoly(fp, &tr, display->white);
1587 e2713e92 2004-04-24 devnull screen = scr0;
1592 e2713e92 2004-04-24 devnull void move_fp(fpolygon* fp, double dx, double dy)
1594 e2713e92 2004-04-24 devnull fpoint *p, *pn=fp->p+fp->n;
1595 e2713e92 2004-04-24 devnull for (p=fp->p; p<=pn; p++) {
1596 e2713e92 2004-04-24 devnull (p->x) += dx;
1597 e2713e92 2004-04-24 devnull (p->y) += dy;
1599 e2713e92 2004-04-24 devnull (fp->bb.min.x)+=dx; (fp->bb.min.y)+=dy;
1600 e2713e92 2004-04-24 devnull (fp->bb.max.x)+=dx; (fp->bb.max.y)+=dy;
1604 e2713e92 2004-04-24 devnull void rotate_fp(fpolygon* fp, fpoint o, double theta)
1606 e2713e92 2004-04-24 devnull double s=sin(theta), c=cos(theta);
1607 e2713e92 2004-04-24 devnull fpoint *p, *pn=fp->p+fp->n;
1608 e2713e92 2004-04-24 devnull for (p=fp->p; p<=pn; p++) {
1609 e2713e92 2004-04-24 devnull double x=p->x-o.x, y=p->y-o.y;
1610 e2713e92 2004-04-24 devnull (p->x) = o.x + c*x - s*y;
1611 e2713e92 2004-04-24 devnull (p->y) = o.y + s*x + c*y;
1613 e2713e92 2004-04-24 devnull set_fbb(fp);
1617 e2713e92 2004-04-24 devnull /* Move the selected fpolygon so the selected point tracks the mouse, and return
1618 e2713e92 2004-04-24 devnull the total amount of movement. Button but has already been held down for at
1619 e2713e92 2004-04-24 devnull least Mv_delay milliseconds and the mouse might have moved some distance.
1621 e2713e92 2004-04-24 devnull fpoint do_move(int but, Mouse* m)
1623 e2713e92 2004-04-24 devnull transform tr = cur_trans();
1624 e2713e92 2004-04-24 devnull int bbit = Button_bit(but);
1625 e2713e92 2004-04-24 devnull fpolygon* fp = cur_sel.fp;
1626 e2713e92 2004-04-24 devnull fpoint loc, loc0=cur_sel.p;
1627 e2713e92 2004-04-24 devnull double tsav = cur_sel.t;
1628 e2713e92 2004-04-24 devnull unselect(&tr);
1629 e2713e92 2004-04-24 devnull do { latest_mouse(but, m);
1630 e2713e92 2004-04-24 devnull (fp->thick)++; /* line() DISAGREES WITH ITSELF */
1631 e2713e92 2004-04-24 devnull draw_fpoly(fp, &tr, mv_bkgd);
1632 e2713e92 2004-04-24 devnull (fp->thick)--;
1633 e2713e92 2004-04-24 devnull do_untransform(&loc, &tr, &m->xy);
1634 e2713e92 2004-04-24 devnull move_fp(fp, loc.x-cur_sel.p.x, loc.y-cur_sel.p.y);
1635 e2713e92 2004-04-24 devnull cur_sel.p = loc;
1636 e2713e92 2004-04-24 devnull draw_fpoly(fp, &tr, fp->clr);
1637 e2713e92 2004-04-24 devnull } while (m->buttons & bbit);
1638 e2713e92 2004-04-24 devnull cur_sel.t = tsav;
1639 e2713e92 2004-04-24 devnull reselect(&tr);
1640 e2713e92 2004-04-24 devnull loc.x -= loc0.x;
1641 e2713e92 2004-04-24 devnull loc.y -= loc0.y;
1642 e2713e92 2004-04-24 devnull return loc;
1646 e2713e92 2004-04-24 devnull double dir_angle(const Point* pt, const transform* tr)
1648 e2713e92 2004-04-24 devnull fpoint p;
1649 e2713e92 2004-04-24 devnull double dy, dx;
1650 e2713e92 2004-04-24 devnull do_untransform(&p, tr, pt);
1651 e2713e92 2004-04-24 devnull dy=p.y-cur_sel.p.y; dx=p.x-cur_sel.p.x;
1652 e2713e92 2004-04-24 devnull return (dx==0 && dy==0) ? 0.0 : atan2(dy, dx);
1656 e2713e92 2004-04-24 devnull /* Rotate the selected fpolygon around the selection point so as to track the
1657 e2713e92 2004-04-24 devnull direction angle from the selected point to m->xy. Stop when button but goes
1658 e2713e92 2004-04-24 devnull up and return the total amount of rotation in radians.
1660 e2713e92 2004-04-24 devnull double do_rotate(int but, Mouse* m)
1662 e2713e92 2004-04-24 devnull transform tr = cur_trans();
1663 e2713e92 2004-04-24 devnull int bbit = Button_bit(but);
1664 e2713e92 2004-04-24 devnull fpolygon* fp = cur_sel.fp;
1665 e2713e92 2004-04-24 devnull double theta0 = dir_angle(&m->xy, &tr);
1666 e2713e92 2004-04-24 devnull double th, theta = theta0;
1667 e2713e92 2004-04-24 devnull do { latest_mouse(but, m);
1668 e2713e92 2004-04-24 devnull (fp->thick)++; /* line() DISAGREES WITH ITSELF */
1669 e2713e92 2004-04-24 devnull draw_fpoly(fp, &tr, mv_bkgd);
1670 e2713e92 2004-04-24 devnull (fp->thick)--;
1671 e2713e92 2004-04-24 devnull th = dir_angle(&m->xy, &tr);
1672 e2713e92 2004-04-24 devnull rotate_fp(fp, cur_sel.p, th-theta);
1673 e2713e92 2004-04-24 devnull theta = th;
1674 e2713e92 2004-04-24 devnull draw_fpoly(fp, &tr, fp->clr);
1675 e2713e92 2004-04-24 devnull } while (m->buttons & bbit);
1676 e2713e92 2004-04-24 devnull unselect(&tr);
1677 e2713e92 2004-04-24 devnull cur_sel = prev_sel;
1678 e2713e92 2004-04-24 devnull reselect(&tr);
1679 e2713e92 2004-04-24 devnull return theta - theta0;
1684 e2713e92 2004-04-24 devnull /********************************* Edit menu *********************************/
1686 e2713e92 2004-04-24 devnull typedef enum e_index {
1687 e2713e92 2004-04-24 devnull Erecolor, Ethick, Edelete, Eundo, Erotate, Eoptions,
1689 e2713e92 2004-04-24 devnull } e_index;
1691 e2713e92 2004-04-24 devnull char* e_items[Eoptions+1];
1693 e2713e92 2004-04-24 devnull Menu e_menu = {e_items, 0, 0};
1696 e2713e92 2004-04-24 devnull typedef struct e_action {
1697 e2713e92 2004-04-24 devnull e_index typ; /* What type of action */
1698 e2713e92 2004-04-24 devnull fpolygon* fp; /* fpolygon the action applies to */
1699 e2713e92 2004-04-24 devnull Image* clr; /* color to use if typ==Erecolor */
1700 e2713e92 2004-04-24 devnull double amt; /* rotation angle or line thickness */
1701 e2713e92 2004-04-24 devnull fpoint pt; /* movement vector or rotation center */
1702 e2713e92 2004-04-24 devnull struct e_action* link; /* next in a stack */
1703 e2713e92 2004-04-24 devnull } e_action;
1705 e2713e92 2004-04-24 devnull e_action* unact = 0; /* heads a linked list of actions */
1706 e2713e92 2004-04-24 devnull e_action* do_undo(e_action*); /* pop off an e_action and (un)do it */
1707 e2713e92 2004-04-24 devnull e_action* save_act(e_action*,e_index); /* append new e_action for status quo */
1710 e2713e92 2004-04-24 devnull void save_mv(fpoint movement)
1712 e2713e92 2004-04-24 devnull unact = save_act(unact, Emove);
1713 e2713e92 2004-04-24 devnull unact->pt = movement;
1717 e2713e92 2004-04-24 devnull void init_e_menu(void)
1719 e2713e92 2004-04-24 devnull char* u = "can't undo";
1720 e2713e92 2004-04-24 devnull e_items[Erecolor] = "recolor";
1721 e2713e92 2004-04-24 devnull e_items[Edelete] = "delete";
1722 e2713e92 2004-04-24 devnull e_items[Erotate] = "rotate";
1723 e2713e92 2004-04-24 devnull e_items[Eoptions-cantmv] = 0;
1724 e2713e92 2004-04-24 devnull e_items[Ethick] = (cur_sel.fp->thick >0) ? "thin" : "thick";
1725 e2713e92 2004-04-24 devnull if (unact!=0)
1726 e2713e92 2004-04-24 devnull switch (unact->typ) {
1727 e2713e92 2004-04-24 devnull case Erecolor: u="uncolor"; break;
1728 e2713e92 2004-04-24 devnull case Ethick: u=(unact->fp->thick==0) ? "unthin" : "unthicken";
1730 e2713e92 2004-04-24 devnull case Edelete: u="undelete"; break;
1731 e2713e92 2004-04-24 devnull case Emove: u="unmove"; break;
1732 e2713e92 2004-04-24 devnull case Erotate: u="unrotate"; break;
1734 e2713e92 2004-04-24 devnull e_items[Eundo] = u;
1738 e2713e92 2004-04-24 devnull void do_emenu(int but, Mouse* m)
1741 e2713e92 2004-04-24 devnull if (cur_sel.t < 0)
1742 e2713e92 2004-04-24 devnull return;
1743 e2713e92 2004-04-24 devnull init_e_menu();
1744 e2713e92 2004-04-24 devnull h = emenuhit(but, m, &e_menu);
1745 e2713e92 2004-04-24 devnull switch(h) {
1746 e2713e92 2004-04-24 devnull case Ethick: unact = save_act(unact, h);
1747 e2713e92 2004-04-24 devnull cur_sel.fp->thick ^= 1;
1748 e2713e92 2004-04-24 devnull eresized(0);
1750 e2713e92 2004-04-24 devnull case Edelete: unact = save_act(unact, h);
1751 e2713e92 2004-04-24 devnull fp_remove(&univ, cur_sel.fp);
1752 e2713e92 2004-04-24 devnull unselect(0);
1753 e2713e92 2004-04-24 devnull eresized(0);
1755 e2713e92 2004-04-24 devnull case Erecolor: unact = save_act(unact, h);
1756 e2713e92 2004-04-24 devnull do_recolor(but, m, 0);
1758 e2713e92 2004-04-24 devnull case Erotate: unact = save_act(unact, h);
1759 e2713e92 2004-04-24 devnull prepare_mv(cur_sel.fp);
1760 e2713e92 2004-04-24 devnull if (get_1click(but, m, 0)) {
1761 e2713e92 2004-04-24 devnull unact->pt = cur_sel.p;
1762 e2713e92 2004-04-24 devnull unact->amt = do_rotate(but, m);
1765 e2713e92 2004-04-24 devnull case Eundo: unact = do_undo(unact);
1772 e2713e92 2004-04-24 devnull /******************************* Undoing edits *******************************/
1774 e2713e92 2004-04-24 devnull e_action* save_act(e_action* a0, e_index typ)
1775 e2713e92 2004-04-24 devnull { /* append new e_action for status quo */
1776 e2713e92 2004-04-24 devnull e_action* a = malloc(sizeof(e_action));
1777 e2713e92 2004-04-24 devnull a->link = a0;
1778 e2713e92 2004-04-24 devnull a->pt.x = a->pt.y = 0.0;
1779 e2713e92 2004-04-24 devnull a->amt = cur_sel.fp->thick;
1780 e2713e92 2004-04-24 devnull a->clr = cur_sel.fp->clr;
1781 e2713e92 2004-04-24 devnull a->fp = cur_sel.fp;
1782 e2713e92 2004-04-24 devnull a->typ = typ;
1783 e2713e92 2004-04-24 devnull return a;
1787 e2713e92 2004-04-24 devnull /* This would be trivial except it's nice to preserve the selection in order to make
1788 e2713e92 2004-04-24 devnull it easy to undo a series of moves. (There's no do_unrotate() because it's harder
1789 e2713e92 2004-04-24 devnull and less important to preserve the selection in that case.)
1791 e2713e92 2004-04-24 devnull void do_unmove(e_action* a)
1793 e2713e92 2004-04-24 devnull double tsav = cur_sel.t;
1794 e2713e92 2004-04-24 devnull unselect(0);
1795 e2713e92 2004-04-24 devnull move_fp(a->fp, -a->pt.x, -a->pt.y);
1796 e2713e92 2004-04-24 devnull if (a->fp == cur_sel.fp) {
1797 e2713e92 2004-04-24 devnull cur_sel.p.x -= a->pt.x;
1798 e2713e92 2004-04-24 devnull cur_sel.p.y -= a->pt.y;
1800 e2713e92 2004-04-24 devnull cur_sel.t = tsav;
1801 e2713e92 2004-04-24 devnull reselect(0);
1805 e2713e92 2004-04-24 devnull e_action* do_undo(e_action* a0) /* pop off an e_action and (un)do it */
1807 e2713e92 2004-04-24 devnull e_action* a = a0;
1808 e2713e92 2004-04-24 devnull if (a==0)
1809 e2713e92 2004-04-24 devnull return 0;
1810 e2713e92 2004-04-24 devnull switch(a->typ) {
1811 e2713e92 2004-04-24 devnull case Ethick: a->fp->thick = a->amt;
1812 e2713e92 2004-04-24 devnull eresized(0);
1814 e2713e92 2004-04-24 devnull case Erecolor: a->fp->clr = a->clr;
1815 e2713e92 2004-04-24 devnull eresized(0);
1817 e2713e92 2004-04-24 devnull case Edelete:
1818 e2713e92 2004-04-24 devnull a->fp->link = univ.p;
1819 e2713e92 2004-04-24 devnull univ.p = a->fp;
1820 e2713e92 2004-04-24 devnull grow_bb(&univ.bb, &a->fp->bb);
1821 e2713e92 2004-04-24 devnull eresized(0);
1823 e2713e92 2004-04-24 devnull case Emove:
1824 e2713e92 2004-04-24 devnull do_unmove(a);
1825 e2713e92 2004-04-24 devnull eresized(0);
1827 e2713e92 2004-04-24 devnull case Erotate:
1828 e2713e92 2004-04-24 devnull unselect(0);
1829 e2713e92 2004-04-24 devnull rotate_fp(a->fp, a->pt, -a->amt);
1830 e2713e92 2004-04-24 devnull eresized(0);
1833 e2713e92 2004-04-24 devnull a0 = a->link;
1834 e2713e92 2004-04-24 devnull free(a);
1835 e2713e92 2004-04-24 devnull return a0;
1840 e2713e92 2004-04-24 devnull /********************************* Main menu *********************************/
1842 e2713e92 2004-04-24 devnull enum m_index { Mzoom_in, Mzoom_out, Munzoom, Mslant, Munslant,
1843 e2713e92 2004-04-24 devnull Msquare_up, Mrecenter, Mrecolor, Mrestack, Mread,
1844 e2713e92 2004-04-24 devnull Mwrite, Mexit};
1845 e2713e92 2004-04-24 devnull char* m_items[] = {"zoom in", "zoom out", "unzoom", "slant", "unslant",
1846 e2713e92 2004-04-24 devnull "square up", "recenter", "recolor", "restack", "read",
1847 e2713e92 2004-04-24 devnull "write", "exit", 0};
1849 e2713e92 2004-04-24 devnull Menu m_menu = {m_items, 0, 0};
1852 e2713e92 2004-04-24 devnull void do_mmenu(int but, Mouse* m)
1854 e2713e92 2004-04-24 devnull int e, h = emenuhit(but, m, &m_menu);
1855 e2713e92 2004-04-24 devnull switch (h) {
1856 e2713e92 2004-04-24 devnull case Mzoom_in:
1857 e2713e92 2004-04-24 devnull disp_zoomin(egetrect(but,m));
1858 e2713e92 2004-04-24 devnull eresized(0);
1860 e2713e92 2004-04-24 devnull case Mzoom_out:
1861 e2713e92 2004-04-24 devnull disp_zoomout(egetrect(but,m));
1862 e2713e92 2004-04-24 devnull eresized(0);
1864 e2713e92 2004-04-24 devnull case Msquare_up:
1865 e2713e92 2004-04-24 devnull disp_squareup();
1866 e2713e92 2004-04-24 devnull eresized(0);
1868 e2713e92 2004-04-24 devnull case Munzoom:
1869 e2713e92 2004-04-24 devnull init_disp();
1870 e2713e92 2004-04-24 devnull eresized(0);
1872 e2713e92 2004-04-24 devnull case Mrecenter:
1873 e2713e92 2004-04-24 devnull if (get_1click(but, m, &bullseye)) {
1874 e2713e92 2004-04-24 devnull recenter_disp(m->xy);
1875 e2713e92 2004-04-24 devnull eresized(0);
1876 e2713e92 2004-04-24 devnull lift_button(but, m, Never);
1879 e2713e92 2004-04-24 devnull case Mslant:
1880 e2713e92 2004-04-24 devnull if (cur_sel.t>=0 && prev_sel.t>=0) {
1881 e2713e92 2004-04-24 devnull slant_disp(prev_sel.p, cur_sel.p);
1882 e2713e92 2004-04-24 devnull eresized(0);
1885 e2713e92 2004-04-24 devnull case Munslant:
1886 e2713e92 2004-04-24 devnull univ.slant_ht = univ.disp.max.y - univ.disp.min.y;
1887 e2713e92 2004-04-24 devnull eresized(0);
1889 e2713e92 2004-04-24 devnull case Mrecolor:
1890 e2713e92 2004-04-24 devnull do_recolor(but, m, 1);
1892 e2713e92 2004-04-24 devnull case Mrestack:
1893 e2713e92 2004-04-24 devnull fps_invert(&univ);
1894 e2713e92 2004-04-24 devnull eresized(0);
1896 e2713e92 2004-04-24 devnull case Mread:
1897 e2713e92 2004-04-24 devnull e = doinput(prompt_text("File:"));
1898 e2713e92 2004-04-24 devnull if (e==0)
1899 e2713e92 2004-04-24 devnull eresized(0);
1900 e2713e92 2004-04-24 devnull else if (e<0)
1901 e2713e92 2004-04-24 devnull show_mytext(" - can't read");
1903 e2713e92 2004-04-24 devnull char ebuf[80];
1904 e2713e92 2004-04-24 devnull snprintf(ebuf, 80, " - error line %d", e);
1905 e2713e92 2004-04-24 devnull show_mytext(ebuf);
1908 e2713e92 2004-04-24 devnull case Mwrite:
1909 e2713e92 2004-04-24 devnull if (!dooutput(prompt_text("File:")))
1910 e2713e92 2004-04-24 devnull show_mytext(" - can't write");
1912 e2713e92 2004-04-24 devnull case Mexit:
1913 e2713e92 2004-04-24 devnull exits("");
1919 e2713e92 2004-04-24 devnull /****************************** Handling events ******************************/
1921 e2713e92 2004-04-24 devnull void doevent(void)
1923 e2713e92 2004-04-24 devnull ulong etype;
1924 e2713e92 2004-04-24 devnull int mobile;
1925 e2713e92 2004-04-24 devnull ulong mvtime;
1926 e2713e92 2004-04-24 devnull Event ev;
1928 e2713e92 2004-04-24 devnull etype = eread(Emouse|Ekeyboard, &ev);
1929 e2713e92 2004-04-24 devnull if(etype & Emouse) {
1930 e2713e92 2004-04-24 devnull if (ev.mouse.buttons & But1) {
1931 e2713e92 2004-04-24 devnull do_select(ev.mouse.xy);
1932 e2713e92 2004-04-24 devnull mvtime = Never;
1933 e2713e92 2004-04-24 devnull mobile = !cantmv && cur_sel.t>=0;
1934 e2713e92 2004-04-24 devnull if (mobile) {
1935 e2713e92 2004-04-24 devnull mvtime = ev.mouse.msec + Mv_delay;
1936 e2713e92 2004-04-24 devnull prepare_mv(cur_sel.fp);
1937 b1455f33 2004-04-30 devnull if (!lift_button(1, &ev.mouse, mvtime))
1938 b1455f33 2004-04-30 devnull save_mv(do_move(1, &ev.mouse));
1940 e2713e92 2004-04-24 devnull } else if (ev.mouse.buttons & But2)
1941 e2713e92 2004-04-24 devnull do_emenu(2, &ev.mouse);
1942 e2713e92 2004-04-24 devnull else if (ev.mouse.buttons & But3)
1943 e2713e92 2004-04-24 devnull do_mmenu(3, &ev.mouse);
1945 e2713e92 2004-04-24 devnull /* no need to check (etype & Ekeyboard)--there are no keyboard commands */
1950 e2713e92 2004-04-24 devnull /******************************** Main program ********************************/
1952 e2713e92 2004-04-24 devnull extern char* argv0;
1954 e2713e92 2004-04-24 devnull void usage(void)
1957 e2713e92 2004-04-24 devnull fprintf(stderr,"Usage %s [options] [infile]\n", argv0);
1958 e2713e92 2004-04-24 devnull fprintf(stderr,
1959 be36ff68 2004-04-29 devnull "option ::= -W winsize | -l logfile | -m\n"
1961 e2713e92 2004-04-24 devnull "Read a polygonal line graph in an ASCII format (one x y pair per line, delimited\n"
1962 e2713e92 2004-04-24 devnull "by spaces with a label after each polyline), and view it interactively. Use\n"
1963 e2713e92 2004-04-24 devnull "standard input if no infile is specified.\n"
1964 e2713e92 2004-04-24 devnull "Option -l specifies a file in which to log the coordinates of each point selected.\n"
1965 e2713e92 2004-04-24 devnull "(Clicking a point with button one selects it and displays its coordinates and\n"
1966 e2713e92 2004-04-24 devnull "the label of its polylone.) Option -m allows polylines to be moved and rotated.\n"
1967 e2713e92 2004-04-24 devnull "The polyline labels can use the following color names:"
1969 e2713e92 2004-04-24 devnull for (i=0; clrtab[i].c!=DNofill; i++)
1970 e2713e92 2004-04-24 devnull fprintf(stderr,"%s%8s", (i%8==0 ? "\n" : " "), clrtab[i].nam);
1971 e2713e92 2004-04-24 devnull fputc('\n', stderr);
1972 e2713e92 2004-04-24 devnull exits("usage");
1975 e2713e92 2004-04-24 devnull void main(int argc, char *argv[])
1979 e2713e92 2004-04-24 devnull ARGBEGIN {
1980 e2713e92 2004-04-24 devnull case 'm': cantmv=0;
1982 e2713e92 2004-04-24 devnull case 'l': logfil = fopen(ARGF(),"w");
1984 be36ff68 2004-04-29 devnull case 'W':
1985 be36ff68 2004-04-29 devnull winsize = EARGF(usage());
1987 e2713e92 2004-04-24 devnull default: usage();
1988 e2713e92 2004-04-24 devnull } ARGEND
1990 e2713e92 2004-04-24 devnull if(initdraw(0, 0, "gview") < 0)
1991 e2713e92 2004-04-24 devnull exits("initdraw");
1992 e2713e92 2004-04-24 devnull einit(Emouse|Ekeyboard);
1994 e2713e92 2004-04-24 devnull e = doinput(*argv ? *argv : "-");
1995 e2713e92 2004-04-24 devnull if (e < 0) {
1996 e2713e92 2004-04-24 devnull fprintf(stderr,"Cannot read input file %s\n", *argv);
1997 e2713e92 2004-04-24 devnull exits("no valid input file");
1998 e2713e92 2004-04-24 devnull } else if (e > 0) {
1999 e2713e92 2004-04-24 devnull fprintf(stderr,"Bad syntax at line %d in input file\n", e);
2000 e2713e92 2004-04-24 devnull exits("bad syntax in input");
2002 e2713e92 2004-04-24 devnull init_disp();
2003 e2713e92 2004-04-24 devnull init_clrtab();
2004 e2713e92 2004-04-24 devnull set_default_clrs(&univ, 0);
2005 e2713e92 2004-04-24 devnull adjust_border(display->defaultfont);
2006 e2713e92 2004-04-24 devnull cur_sel.t = prev_sel.t = -1;
2007 e2713e92 2004-04-24 devnull eresized(0);
2008 e2713e92 2004-04-24 devnull for(;;)
2009 e2713e92 2004-04-24 devnull doevent();
