code: plan9front

ref: 5622b0bbd878dbc34045cc6fd37cffa64461eabe
dir: /sys/src/cmd/plot/libplot/box.c/

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#include "mplot.h"
void box(double x0, double y0, double x1, double y1){
	move(x0, y0);
	vec(x0, y1);
	vec(x1, y1);
	vec(x1, y0);
	vec(x0, y0);
}