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- #include "mplot.h"
- void frame(double xs, double ys, double xf, double yf){
- register double osidex, osidey;
- osidex = e1->sidex;
- osidey = e1->sidey;
- e1->left = e0->left + xs * e0->sidex;
- e1->bottom = e0->bottom + ys * e0->sidey;
- e1->sidex = (xf-xs)*e0->sidex;
- e1->sidey = (yf-ys)*e0->sidey;
- e1->scalex *= (e1->sidex / osidex);
- e1->scaley *= (e1->sidey / osidey);
- e1->quantum=e0->quantum/sqrt(e1->scalex*e1->scalex +
- e1->scaley*e1->scaley);
- if(e1->quantum < .01)
- e1->quantum = .01;
- }
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