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glTF2: export materials' normal maps

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This commit is contained in:
jamesgk
2017-07-26 14:42:22 -07:00
parent b7b17b03ec
commit c91e9a94da
4 changed files with 44 additions and 28 deletions
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code/glTF2Exporter.cpp
+28 -23
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@@ -240,10 +240,10 @@ namespace {
}
}
void glTF2Exporter::GetTexSampler(const aiMaterial* mat, TexProperty& prop)
void glTF2Exporter::GetTexSampler(const aiMaterial* mat, Ref<Texture> texture)
{
std::string samplerId = mAsset->FindUniqueID("", "sampler");
prop.texture->sampler = mAsset->samplers.Create(samplerId);
texture->sampler = mAsset->samplers.Create(samplerId);
aiTextureMapMode mapU, mapV;
aiGetMaterialInteger(mat,AI_MATKEY_MAPPINGMODE_U_DIFFUSE(0),(int*)&mapU);
@@ -251,45 +251,44 @@ void glTF2Exporter::GetTexSampler(const aiMaterial* mat, TexProperty& prop)
switch (mapU) {
case aiTextureMapMode_Wrap:
prop.texture->sampler->wrapS = SamplerWrap_Repeat;
texture->sampler->wrapS = SamplerWrap_Repeat;
break;
case aiTextureMapMode_Clamp:
prop.texture->sampler->wrapS = SamplerWrap_Clamp_To_Edge;
texture->sampler->wrapS = SamplerWrap_Clamp_To_Edge;
break;
case aiTextureMapMode_Mirror:
prop.texture->sampler->wrapS = SamplerWrap_Mirrored_Repeat;
texture->sampler->wrapS = SamplerWrap_Mirrored_Repeat;
break;
case aiTextureMapMode_Decal:
default:
prop.texture->sampler->wrapS = SamplerWrap_Repeat;
texture->sampler->wrapS = SamplerWrap_Repeat;
break;
};
switch (mapV) {
case aiTextureMapMode_Wrap:
prop.texture->sampler->wrapT = SamplerWrap_Repeat;
texture->sampler->wrapT = SamplerWrap_Repeat;
break;
case aiTextureMapMode_Clamp:
prop.texture->sampler->wrapT = SamplerWrap_Clamp_To_Edge;
texture->sampler->wrapT = SamplerWrap_Clamp_To_Edge;
break;
case aiTextureMapMode_Mirror:
prop.texture->sampler->wrapT = SamplerWrap_Mirrored_Repeat;
texture->sampler->wrapT = SamplerWrap_Mirrored_Repeat;
break;
case aiTextureMapMode_Decal:
default:
prop.texture->sampler->wrapT = SamplerWrap_Repeat;
texture->sampler->wrapT = SamplerWrap_Repeat;
break;
};
// Hard coded Texture filtering options because I do not know where to find them in the aiMaterial.
prop.texture->sampler->magFilter = SamplerMagFilter_Linear;
prop.texture->sampler->minFilter = SamplerMinFilter_Linear;
texture->sampler->magFilter = SamplerMagFilter_Linear;
texture->sampler->minFilter = SamplerMinFilter_Linear;
}
void glTF2Exporter::GetMatColorOrTex(const aiMaterial* mat, TexProperty& prop, const char* propName, int type, int idx, aiTextureType tt)
void glTF2Exporter::GetMatTex(const aiMaterial* mat, Ref<Texture>& texture, aiTextureType tt)
{
aiString tex;
aiColor4D col;
if (mat->GetTextureCount(tt) > 0) {
if (mat->Get(AI_MATKEY_TEXTURE(tt, 0), tex) == AI_SUCCESS) {
std::string path = tex.C_Str();
@@ -298,43 +297,48 @@ void glTF2Exporter::GetMatColorOrTex(const aiMaterial* mat, TexProperty& prop, c
if (path[0] != '*') {
std::map<std::string, unsigned int>::iterator it = mTexturesByPath.find(path);
if (it != mTexturesByPath.end()) {
prop.texture = mAsset->textures.Get(it->second);
texture = mAsset->textures.Get(it->second);
}
}
if (!prop.texture) {
if (!texture) {
std::string texId = mAsset->FindUniqueID("", "texture");
prop.texture = mAsset->textures.Create(texId);
mTexturesByPath[path] = prop.texture.GetIndex();
texture = mAsset->textures.Create(texId);
mTexturesByPath[path] = texture.GetIndex();
std::string imgId = mAsset->FindUniqueID("", "image");
prop.texture->source = mAsset->images.Create(imgId);
texture->source = mAsset->images.Create(imgId);
if (path[0] == '*') { // embedded
aiTexture* tex = mScene->mTextures[atoi(&path[1])];
uint8_t* data = reinterpret_cast<uint8_t*>(tex->pcData);
prop.texture->source->SetData(data, tex->mWidth, *mAsset);
texture->source->SetData(data, tex->mWidth, *mAsset);
if (tex->achFormatHint[0]) {
std::string mimeType = "image/";
mimeType += (memcmp(tex->achFormatHint, "jpg", 3) == 0) ? "jpeg" : tex->achFormatHint;
prop.texture->source->mimeType = mimeType;
texture->source->mimeType = mimeType;
}
}
else {
prop.texture->source->uri = path;
texture->source->uri = path;
}
GetTexSampler(mat, prop);
GetTexSampler(mat, texture);
}
}
}
}
}
void glTF2Exporter::GetMatColorOrTex(const aiMaterial* mat, TexProperty& prop, const char* propName, int type, int idx, aiTextureType tt)
{
aiColor4D col;
if (mat->Get(propName, type, idx, col) == AI_SUCCESS) {
prop.color[0] = col.r; prop.color[1] = col.g; prop.color[2] = col.b; prop.color[3] = col.a;
}
GetMatTex(mat, prop.texture, tt);
}
@@ -357,6 +361,7 @@ void glTF2Exporter::ExportMaterials()
GetMatColorOrTex(mat, m->diffuse, AI_MATKEY_COLOR_DIFFUSE, aiTextureType_DIFFUSE);
GetMatColorOrTex(mat, m->specular, AI_MATKEY_COLOR_SPECULAR, aiTextureType_SPECULAR);
GetMatColorOrTex(mat, m->emission, AI_MATKEY_COLOR_EMISSIVE, aiTextureType_EMISSIVE);
GetMatTex(mat, m->normal, aiTextureType_NORMALS);
m->transparent = mat->Get(AI_MATKEY_OPACITY, m->transparency) == aiReturn_SUCCESS && m->transparency != 1.0;