git: 9front

ref: 1656d16bea8cb893b47ac0fe29eabf3777d5a3e3
dir: /sys/src/cmd/plot/libplot/range.c/

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#include "mplot.h"
void range(double x0, double y0, double x1, double y1){
	e1->xmin = x0;
	e1->ymin = y0;
	e1->scalex = e1->sidex / (x1 - x0 );
	e1->scaley = e1->sidey / (y1 - y0 );
	e1->quantum=e0->quantum/sqrt(e1->scalex*e1->scalex +
		e1->scaley*e1->scaley);
	if(e1->quantum < .01)
		e1->quantum = .01;
}