Hey guys, I'm trying to do some very simple programmatic texture fading. But, regardless of what alpha I give my color coordinates, I cannot get the texture to fade at all. Here's some snippets of code

I do set :
gl.glTexEnvx(GL10.GL_TEXTURE_ENV, GL10.GL_TEXTURE_ENV_MODE, GL10.GL_MODULATE);

I also use GLUtils to load the texture:
GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, bitmap, 0);

My drawing is as straightforward as it gets. I'm not even using VBO's. I create a quad, map a color buffer using the given array (obviously along with a texture and vert buffer)


and do a basic draw:


The texture appears on the screen, but without any of the alpha as I wanted it. It looks just I drew it using using drawTexture or something.

Is there something I'm missing here? Could this possibly be my issue http://groups.google.com/group/android- ... 3e63f82fca

Any help would be much appreciated. Thanks.

Ok, I partially solved this. I needed to make my color array consist entirely of the alpha, a la, glColor4f().




Unfortunately, I can't seem to get a "gradient" fade to work. The alpha always seems to be an average of the alphas of the verts

It wasn't clear from your code snippet, are you setting the blend mode?
E.g.:

glEnable(GL_BLEND)
glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA)

Yes, I am setting blend mode and blend function as above.