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improve md3::Q3 shader::cull keyword support 

only use nonstandard winding order with `cull back`; might be excess too, since engine doesn't support this
pull/3847/head
Garux 2021-04-30 22:59:05 +03:00
parent 0b7ebef497
commit 55abc49d6d
1 changed files with 5 additions and 5 deletions
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10
code/AssetLib/MD3/MD3Loader.cpp
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@ -196,11 +196,11 @@ bool Q3Shader::LoadShader(ShaderData &fill, const std::string &pFile, IOSystem *
// 'cull' specifies culling behaviour for the model
else if (TokenMatchI(buff, "cull", 4)) {
SkipSpaces(&buff);
if (!ASSIMP_strincmp(buff, "back", 4)) {
if (!ASSIMP_strincmp(buff, "back", 4)) { // render face's backside, does not function in Q3 engine (bug)
curData->cull = Q3Shader::CULL_CCW;
} else if (!ASSIMP_strincmp(buff, "front", 5)) {
} else if (!ASSIMP_strincmp(buff, "front", 5)) { // is not valid keyword in Q3, but occurs in shaders
curData->cull = Q3Shader::CULL_CW;
} else if (!ASSIMP_strincmp(buff, "none", 4) || !ASSIMP_strincmp(buff, "disable", 7)) {
} else if (!ASSIMP_strincmp(buff, "none", 4) || !ASSIMP_strincmp(buff, "twosided", 8) || !ASSIMP_strincmp(buff, "disable", 7)) {
curData->cull = Q3Shader::CULL_NONE;
} else {
ASSIMP_LOG_ERROR("Q3Shader: Unrecognized cull mode");
@ -986,8 +986,8 @@ void MD3Importer::InternReadFile(const std::string &pFile, aiScene *pScene, IOSy
pcMesh->mTextureCoords[0][iCurrent].x = pcUVs[index].U;
pcMesh->mTextureCoords[0][iCurrent].y = 1.0f - pcUVs[index].V;
}
// Flip face order if necessary
if (!shader || shader->cull == Q3Shader::CULL_CW) {
// Flip face order normally, unless shader is backfacing
if (!(shader && shader->cull == Q3Shader::CULL_CCW)) {
std::swap(pcMesh->mFaces[i].mIndices[2], pcMesh->mFaces[i].mIndices[1]);
}
++pcTriangles;