i tried to combine two textures in one pass, it worked, but the second texture wasnt lighted, only the first one. i did the same effect like glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL); with the combiner extension like this: glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_EXT); glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB_EXT, GL_INTERPOLATE_EXT); glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB_EXT, GL_TEXTURE); glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_RGB_EXT, GL_PREVIOUS_EXT); glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_RGB_EXT, GL_TEXTURE); glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB_EXT, GL_SRC_COLOR); glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_RGB_EXT, GL_SRC_COLOR); glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_RGB_EXT, GL_SRC_ALPHA); the effect is the same, but i thought that with that the second texture is lighted like the underlaying first. by doing that with GL_DECAL it is documented that the second one isnt lighted. how can i get the second one lighted??? without doing it in two passes. i tried the NV extension texture_env_combine4 like this: glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE4_NV); glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB_EXT, GL_ADD); glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB_EXT, GL_TEXTURE1_ARB); glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_RGB_EXT, GL_TEXTURE1_ARB); glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_RGB_EXT, GL_TEXTURE0_ARB); glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE3_RGB_NV, GL_TEXTURE1_ARB); glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB_EXT, GL_SRC_COLOR); glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_RGB_EXT, GL_SRC_ALPHA); glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_RGB_EXT, GL_SRC_COLOR); glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND3_RGB_NV, GL_ONE_MINUS_SRC_ALPHA); but now both textures arent lighted... ?????? does anyone know how to do this? in the extension specs isnt anything sayed about that. Christoph

Have you included glext.h?

"Finger to spiritual emptiness underlying everything." -- How a C manual referred to a "pointer to void." --Things People Said

http://druidgames.cjb.net/

yes, glext.h is included, and the combining works fine, but the lighting is the problem...

@ zed

the combinig can be done in 2passes with

test.setactive(0);
test.LockArrays();
glTranslatef(-4.0f,0.0f,0.0f);
test.texture.UseTexture(1);
glEnable(GL_TEXTURE_2D);
glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);//GL_REFLECTION_MAP_NV);
glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);//GL_REFLECTION_MAP_NV);

glEnable(GL_TEXTURE_GEN_S);
glEnable(GL_TEXTURE_GEN_T);
test.Draw();

glDisable(GL_TEXTURE_GEN_S);
glDisable(GL_TEXTURE_GEN_T);

glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);
glEnable(GL_BLEND);
test.texture.UseTexture(0);
test.Draw();
glDisable(GL_BLEND);
glDisable(GL_TEXTURE_2D);
test.deactive();
test.UnlockArrays();

with normal blending. but i want to do it in one pass with multitextureing. the second texture (texture(o)) has a alpha channel, which is used to blend. it can be done with glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL); <--------
but now the prob with the lighting. and with the combiner the same prob. and with the nvidia tex_combine4 another prob, there is no lighting on both textures.

www.nvidia.com

in the developer corner

cu