1 #include "mplot.h" sbox(double xx0,double yy0,double xx1,double yy1)2void sbox(double xx0, double yy0, double xx1, double yy1){ 3 int x0=SCX(xx0), y0=SCY(yy0), x1=SCX(xx1), y1=SCY(yy1); 4 int t; 5 if(x1<x0){ t=x0; x0=x1; x1=t; } 6 if(y1<y0){ t=y0; y0=y1; y1=t; } 7 if(x0<clipminx) x0=clipminx; 8 if(y0<clipminy) y0=clipminy; 9 if(x1>clipmaxx) x1=clipmaxx; 10 if(y1>clipmaxy) y1=clipmaxy; 11 if(x1<x0 || y1<y0) return; 12 m_clrwin(x0, y0, x1, y1, e1->backgr); 13 } 14