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From: echidna@ecr.mu.oz.au (Eric H. Echidna)
Newsgroups: comp.sys.sgi
Subject: What's with the polymode call.....
Keywords: does it work?
Message-ID: <1991Jun7.055225.3382@mulga.cs.mu.OZ.AU>
Date: 7 Jun 91 05:52:25 GMT
Sender: news@cs.mu.OZ.AU
Organization: Comp Sci, University of Melbourne, Australia
Lines: 64


	We recently had some code that made use of the 'polymode' call
to change the way various polygons were being filled. It didn't have
ant effect at all. This is on a PI 4D25. Here is an example that doesn't
work....what's up?

#include <gl.h>
#include <device.h>

main()
{
	short	val;

	prefsize(700, 700);
	winopen("test1");

	unqdevice(INPUTCHANGE);
	qdevice(KEYBD);

	viewport(0, 600, 0, 500);
	ortho2(0.0, 600.0, 0.0, 500.0);

	color(CYAN);
	clear();

	color(RED);
	/*
	 * manual says that rectf is effected by polymode - it don't work
	 */
	polymode(PYM_LINE);
	rectf(100.0, 100.0, 400.0, 400.0);

	(void)qread(&val);

	color(CYAN);
	clear();

	color(GREEN);
	/*
	 * manual says that pmv/pdr/pclos is effected by polymode -
	 * it don't work
	 */
	polymode(PYM_LINE);
	pmv2(100.0, 100.0);
	pdr2(100.0, 400.0);
	pdr2(400.0, 400.0);
	pdr2(400.0, 100.0);
	pclos();

	(void)qread(&val);

	color(CYAN);
	clear();

	color(GREEN);
	polymode(PYM_POINT);
	pmv2(100.0, 100.0);
	pdr2(100.0, 400.0);
	pdr2(400.0, 400.0);
	pdr2(400.0, 100.0);
	pclos();

	(void)qread(&val);
}