I tested that code, but it doesnt work... the wall texture works, but i only see white in the transparent areas, the pipe texture isnt there at all, code:
void render(){ glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT ); glMatrixMode( GL_MODELVIEW ); glLoadIdentity(); glTranslatef( 0.0f, 0.0f, g_fDistance ); glRotatef( -g_fSpinY, 1.0f, 0.0f, 0.0f ); glRotatef( -g_fSpinX, 0.0f, 1.0f, 0.0f ); glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); glEnable(GL_BLEND); glActiveTextureARB(GL_TEXTURE0); glEnable(GL_TEXTURE_2D); glBindTexture(GL_TEXTURE_2D, g_textureID_0); glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL); //------------------------ glActiveTextureARB(GL_TEXTURE1); glEnable(GL_TEXTURE_2D); glBindTexture(GL_TEXTURE_2D, g_textureID_1); glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE); glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB, GL_INTERPOLATE); //Interpolate RGB with RGB glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB, GL_PREVIOUS); glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_RGB, GL_TEXTURE); glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_RGB, GL_PREVIOUS); glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB, GL_SRC_COLOR); glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_RGB, GL_SRC_COLOR); glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_RGB, GL_SRC_ALPHA); //------------------------ glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA, GL_INTERPOLATE); //Interpolate ALPHA with ALPHA glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA, GL_PREVIOUS); glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_ALPHA, GL_TEXTURE); glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_ALPHA, GL_PREVIOUS); glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA, GL_SRC_ALPHA); glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_ALPHA, GL_SRC_ALPHA); glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_ALPHA, GL_SRC_ALPHA); glColor4f(1, 1, 1, 1); glBegin(GL_QUADS); glMultiTexCoord2fARB( GL_TEXTURE0_ARB, 0.0f, 0.0f ); glMultiTexCoord2fARB( GL_TEXTURE1_ARB, 0.0f, 0.0f ); glVertex3f( -1.0f, -1.0f, 0.0f ); glMultiTexCoord2fARB( GL_TEXTURE0_ARB, 0.0f, 1.0f ); glMultiTexCoord2fARB( GL_TEXTURE1_ARB, 0.0f, 1.0f ); glVertex3f( -1.0f, 1.0f, 0.0f ); glMultiTexCoord2fARB( GL_TEXTURE0_ARB, 1.0f, 1.0f ); glMultiTexCoord2fARB( GL_TEXTURE1_ARB, 1.0f, 1.0f ); glVertex3f( 1.0f, 1.0f, 0.0f ); glMultiTexCoord2fARB( GL_TEXTURE0_ARB, 1.0f, 0.0f ); glMultiTexCoord2fARB( GL_TEXTURE1_ARB, 1.0f, 0.0f ); glVertex3f( 1.0f, -1.0f, 0.0f ); glEnd(); glActiveTextureARB(GL_TEXTURE0_ARB); glDisable(GL_TEXTURE_2D); glActiveTextureARB(GL_TEXTURE1_ARB); glDisable(GL_TEXTURE_2D); SwapBuffers( g_hDC );}
any ideas?
i know for sure that textures are loaded properly, i tested without multitexturing and the alpha is there etc.
Edit: if i put color to glColor4f(1, 1, 1, 0.5f); then i can see the pipe texture 50% and wall 50% ... doesnt make any sense. how i can make both textures show there with full opacity, just like the example image i made?
if i switch g_textureID_1 and g_textureID_0, then i see pipe texture but not wall texture at all.
Blue color means 100% transparent pixels.
I found some multitexture examples for something similar, but i wasnt able to modify it to my purposes, could someone give good guide for these glTexEnvf() parameters, because they makes no sense to me :E it should be simple but this code below is nothing like simple...
Or give me the correct parameters to these functions to do the trick, if you feel like that :P
