weird colors ?
Author
When I load a image using the :
glTexImage2D() function my colors fuc* up...
So that the color 255,255,255 aint white anymore but some kind of light blue/green color.
When i remove the call to glTexImage2D() i get normal colors again.
Anyone got any ideas ?
OpenGL is a state machine. When you enable texturing it remains enabled until you disable it. When you specify a texture coordinate it applies to all subsequent vertices until you change it. So:
is actually equivalent to:
So your coloured quad is actually textured with a single texel from your texture.
The solution, as stated by Trienco above, is to disable texturing for any objects you don''t want textured.
glEnable(GL_TEXTURE_2D);// try to draw textured quadglColor3f(1, 1, 1);glBegin(GL_QUADS); glTexCoord2f(0, 0); glVertex2f(0, 0); glTexCoord2f(1, 0); glVertex2f(1, 0); glTexCoord2f(1, 1); glVertex2f(1, 1); glTexCoord2f(0, 1); glVertex2f(0, 1);glEnd();// try to draw coloured quadglColor3f(1, 0, 0);glBegin(GL_QUADS); glVertex2f(2, 0); glVertex2f(3, 0); glVertex2f(3, 1); glVertex2f(2, 1);glEnd();is actually equivalent to:
glEnable(GL_TEXTURE_2D);// try to draw textured quadglColor3f(1, 1, 1);glBegin(GL_QUADS); glTexCoord2f(0, 0); glVertex2f(0, 0); glTexCoord2f(1, 0); glVertex2f(1, 0); glTexCoord2f(1, 1); glVertex2f(1, 1); glTexCoord2f(0, 1); glVertex2f(0, 1);glEnd();// try to draw coloured quadglEnable(GL_TEXTURE_2D); // texturing still enabledglColor3f(1, 0, 0);glBegin(GL_QUADS); glTexCoord2f(0, 1); // last texture coord repeated glVertex2f(2, 0); glTexCoord2f(0, 1); // last texture coord repeated glVertex2f(3, 0); glTexCoord2f(0, 1); // last texture coord repeated glVertex2f(3, 1); glTexCoord2f(0, 1); // last texture coord repeated glVertex2f(2, 1);glEnd();So your coloured quad is actually textured with a single texel from your texture.
The solution, as stated by Trienco above, is to disable texturing for any objects you don''t want textured.
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