opengl es - GL_COLOR_MATERIAL with lighting on Android -

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it appears glcolormaterial() absent opengl es. according this post (for iphone), may still enable gl_color_material in opengl es 1.x, you're stuck default settings of gl_front_and_back , gl_ambient_and_diffuse otherwise set glcolormaterial(). ok this, diffuse lighting not working correctly.

i set scene , tested 1 light, setting glmaterialfv() gl_ambient , gl_diffuse once in initialization. normals have been set correctly, , lighting works way it's supposed to. see gouraud shading.

with gl_lighting disabled, flat colors have set glcolor4f() appear on various objects in scene. functions expected. however, when glenable(gl_color_material) called, flat colors remain. expect see lighting effects.

glcolormaterial() mentioned on anddev.org, i'm not sure if information there accurate.

i'm testing on android 2.1 handset (motorola droid).

edit: works on 1.6 handset (adp1). i've filed issue 8015. not work emulator android 1.6 or 2.1.

here minimal testcase reproduce problem.

screenshot on android 1.6 (adp1):

alt text

screenshot of same code running on android 2.1 (motorola droid):

alt text

screenshot on android 1.6 (emulator):

alt text

this silly mistake on part. given 32-bit integer android color, had forgotten scale color components floats in range [0, 1]:

    gl.glcolor4f(color.red(color), color.green(color), color.blue(color), color.alpha(color));

it should have bee this:

    gl.glcolor4f(color.red(color)/(float) 0xff, color.green(color)/(float) 0xff, color.blue(color)/(float) 0xff, color.alpha(color)/(float) 0xff);

i'm not sure why first way still worked on g1.


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