I run my OpenGL program on side-by-side PCs on my desk. When I draw lines with GL_LINES or GL_LINE_LOOP, they are positioned differently on my 2 different PCs. The lines are sometimes offset by one pixel down, and one left. Quads seem to be positioned the same.
Both machines have GeForce video, XP, and current drivers.
What might be causing this?
I’m developing a multi-player game, so I run the same program (same executable) on both machines and immediately see the slight differences in line drawing.
My opengl32.dll has a slightly different date on each PC, but the file-size is exactly the same.
Would seeing a sample image help?