frame.c (496B)
1 #include "mplot.h" 2 void frame(double xs, double ys, double xf, double yf){ 3 register double osidex, osidey; 4 osidex = e1->sidex; 5 osidey = e1->sidey; 6 e1->left = e0->left + xs * e0->sidex; 7 e1->bottom = e0->bottom + ys * e0->sidey; 8 e1->sidex = (xf-xs)*e0->sidex; 9 e1->sidey = (yf-ys)*e0->sidey; 10 e1->scalex *= (e1->sidex / osidex); 11 e1->scaley *= (e1->sidey / osidey); 12 e1->quantum=e0->quantum/sqrt(e1->scalex*e1->scalex + 13 e1->scaley*e1->scaley); 14 if(e1->quantum < .01) 15 e1->quantum = .01; 16 }