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zDepth

Started by BloodLust666 Aug 29, 2006 at 2:37 PM 0 replies 700+ views

Original Post

Aug 29, 2006 at 2:37 PM

in my engine, i render all the sprites first, (quads), with lighting enabled; then my drawing components (lines, rectangles, etc), without lighting. I'm drawing a sprite at Z of -1 and a rectangle with Z -5, but when the scene is drawn, the transparent red background (the drawing component quad), is being draw in front of the sprite. here's the code


// loop
glEnable(GL_TEXTURE_2D);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glDepthMask(false);
glEnable(GL_LIGHTING);

EntityManager.Render(m_fTimeElapsed);
ParticleManager.Render(m_fTimeElapsed);

// Disable textures
glDisable(GL_TEXTURE_2D);
glDepthMask(true);
glDisable(GL_LIGHTING);

DrawingManager.Render();
// end loop

jmaupay

Aug 30, 2006 at 5:14 AM

What arrives if you do glDepthMask(true); instead of
glDepthMask(false); for your sprites ?

If I understand well, you want to blend sprites and quads, but if you suppress the depth writing [glDepthMask(false)] for the sprites, then when you draw quads, they never find any sprite to blend with, because nothing was written in the depth buffer.

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