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GL3.2 for AIX: Graphics Library (GL) Technical Reference
zoing.c Example C Language Program
/*
zoing.c
Make a spiral out of circles.
Paul Haeberli - 1984
*/
#include <gl/device.h>
#include <gl/gl.h>
main()
{
short dev,val;
keepaspect(1,1);
prefposition(XMAXSCREEN/4,XMAXSCREEN*3/4,YMAXSCREEN/4,
YMAXSCREEN*3/4);
winopen("zoing");
qdevice(ESCKEY);
drawit();
while(1) {
if((dev = qread(&val)) == REDRAW)
drawit();
else if (dev == ESCKEY) {
gexit();
exit();
}
}
}
drawit()
{
register int i;
reshapeviewport();
color(7);
clear();
ortho2(-1.0,1.0,-1.0,1.0);
color(0);
translate(-0.1,0.0,0.0);
pushmatrix();
for(i=0; i<200; i++) {
rotate(170,'z');
scale(0.96,0.96,0.0);
pushmatrix();
translate(0.10,0.0,0.0);
circ(0.0,0.0,1.0);
popmatrix();
}
popmatrix();
}
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