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handle same texture for color and transparency

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This commit is contained in:
David Rose 2003-04-16 00:03:52 +00:00
parent 75695f44fc
commit 55fa8d18a6
1 changed files with 28 additions and 10 deletions
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36
pandatool/src/mayaegg/mayaToEggConverter.cxx
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@ -1860,12 +1860,6 @@ set_shader_attributes(EggPrimitive &primitive, const MayaShader &shader) {
<< " has contradictory wrap modes on color and texture.\n";
}
filename = Filename::from_os_specific(trans_def._texture);
fullpath = _path_replace->match_path(filename, get_texture_path());
tex.set_alpha_filename(_path_replace->store_path(fullpath));
tex.set_alpha_fullpath(fullpath);
tex.set_format(EggTexture::F_rgba);
if (!compare_texture_properties(tex, trans_def)) {
// Only report each broken shader once.
static pset<string> bad_shaders;
@ -1875,11 +1869,35 @@ set_shader_attributes(EggPrimitive &primitive, const MayaShader &shader) {
<< shader.get_name() << "\n";
}
}
tex.set_format(EggTexture::F_rgba);
// We should try to be smarter about whether the transparency
// value is connected to the texture's alpha channel or to its
// grayscale channel. However, I'm not sure how to detect
// this at the moment; rather than spending days trying to
// figure out, for now I'll just assume that if the same
// texture image is used for both color and transparency, then
// the artist meant to use the alpha channel for transparency.
if (trans_def._texture == color_def._texture) {
// That means that we don't need to do anything special: use
// all the channels of the texture.
} else {
// Otherwise, pull the alpha channel from the other image
// file. Ideally, we should figure out which channel from
// the other image supplies alpha (and specify this via
// set_alpha_file_channel()), but for now we assume it comes
// from the grayscale data.
filename = Filename::from_os_specific(trans_def._texture);
fullpath = _path_replace->match_path(filename, get_texture_path());
tex.set_alpha_filename(_path_replace->store_path(fullpath));
tex.set_alpha_fullpath(fullpath);
}
} else {
// Otherwise, we don't have any transparency, so tell the egg
// format to ignore any alpha channel that might be on the
// color texture.
// If there is no transparency texture specified, we don't
// have any transparency, so tell the egg format to ignore any
// alpha channel that might be on the color texture.
tex.set_format(EggTexture::F_rgb);
}