1 4314729d 2004-04-14 devnull #include "mplot.h"
 2 4314729d 2004-04-14 devnull void frame(double xs, double ys, double xf, double yf){
 3 4314729d 2004-04-14 devnull 	register double	osidex, osidey;
 4 4314729d 2004-04-14 devnull 	osidex = e1->sidex;
 5 4314729d 2004-04-14 devnull 	osidey = e1->sidey;
 6 4314729d 2004-04-14 devnull 	e1->left = e0->left + xs * e0->sidex;
 7 4314729d 2004-04-14 devnull 	e1->bottom = e0->bottom + ys * e0->sidey;
 8 4314729d 2004-04-14 devnull 	e1->sidex = (xf-xs)*e0->sidex;
 9 4314729d 2004-04-14 devnull 	e1->sidey = (yf-ys)*e0->sidey;
10 4314729d 2004-04-14 devnull 	e1->scalex *= (e1->sidex / osidex);
11 4314729d 2004-04-14 devnull 	e1->scaley *= (e1->sidey / osidey);
12 4314729d 2004-04-14 devnull 	e1->quantum=e0->quantum/sqrt(e1->scalex*e1->scalex +
13 4314729d 2004-04-14 devnull 		e1->scaley*e1->scaley);
14 4314729d 2004-04-14 devnull 	if(e1->quantum < .01)
15 4314729d 2004-04-14 devnull 		e1->quantum = .01;
16 4314729d 2004-04-14 devnull }