DrawPoly & SetOrigin

When I use drawpoly with setorigin offscreen an ofscreen point (or points) of the poly often moves to the wrong place.

Has anyone else experienced this? I don't know how to fix it - but it's causing my project serious distress.

It occurs without using setorigin and using opengl to try and move the view as well.

This little program illustrates the problem. It's so simple, I'm fairly sure it's not my fault - I'm filing it in the bugs forum.

I recognize this is not a convex poly - but since they seem to be allowed with some origin settings - they should be consistently allowed or disallowed either way.

Global xy:Float[] = [0.0, 0.0, 100.0, 0.0, 40.0, 40.0, 0.0, 100.0]

Global x#, y#

Graphics 800, 600, 0

While Not(KeyHit(key_escape))
	
	If KeyDown(key_w) Then y:-2
	If KeyDown(key_s) Then y:+2
	If KeyDown(key_a) Then x:-2
	If KeyDown(key_d) Then x:+2
	
	SetOrigin(-x, -y)
	DrawPoly(xy)
	
	Flip; Cls
	
Wend

Bug reported there:

http://blitzmax.com/Community/posts.php?topic=74601

that little program works fine for me. It might be your graphics card or drivers. what operating system are you using? have you tried it on another computer?

I : WinXP SP2 1GB RAM GeForce fx5200 128MB

Try it under OpenGL perhaps? Were you using D3d?

I experience the problem on a MacBook.

Be sure to move the top left corner of the screen into the poly.

with:

SetGraphicsDriver GLMax2DDriver()

works no problem.

Interesting, anyone else tried it, post result and computer?

Not seeing any problem here...

XP, ATI X1650XT

i never had problems with offscreen problems like that. must be a video card issue.