path: root/src/bin/lineplot.c

#include <stdio.h>
#include <string.h>
#define WIDTH 39
#define HEIGHT 24
char buff[WIDTH*HEIGHT*4];
void draw_line(x1,y1,x2,y2) {
 buff[(y1*WIDTH*2)+x1]='+';
 buff[(((y1+y2)/2) * WIDTH *2)+((x1+x2)/2)]=
 (x1==x2)?'|':(y1==y2)?'-':((x1<x2&&y1>y2)||(x1>x2&&y1<y2))?'/':'\\';
 buff[(y2*WIDTH*2)+x2]='+';
}
int main(int argc,char *argv[]) {
 int x1,y1,x2,y2,y;
 memset(buff,' ',WIDTH*HEIGHT*4);
 while(scanf("%d %d %d %d",&x1,&y1,&x2,&y2) == 4)
  draw_line((x1+8)*2,(y1+8)*2,(x2+8)*2,(y2+8)*2);
 for(y=0;y<HEIGHT*2;y++,write(1,"\n",1)) write(1,buff+(y*WIDTH*2),WIDTH*2);
}