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iliak

OpenGL Sprite fliping (texture ) in OpenGL

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Hi In my 2D engine (C#, OpenGL via TaoFramework) I set texture matrix to match 1:1 on my texture. So if a texture is 256 x 256, I access each texel by its coordinate : texel(0,0) is up left, texel(255, 255) is down right. So far, so good. Now I want to flip vertically or horizontaly the texture to allow my sprite to go left, and go right (up or down) only by flipping the texture coordinate. I tried this :
Gl.GlMatrixMode( GL_TEXTURE )
Gl.GlPushMatrix();

// Verticaly flip the sprite
Gl.GlScaleF(1.0f, -1.0f, 0.0f)


// blah blah


Gl.GlPopMatrix();

Nothing happen... Where am I wrong ??

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Uhm, could it be the filter mode on the texture? I assume you're using fixed functionality so forgetting to multiply with the texture matrix in a shader isn't the issue.

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