Fixed export of transparent materials

Readme.md

@@ -281,6 +281,10 @@ I consider this plugin to be in *beta* stage, use it at your own risk :)
         * do not export standard materials (lambert, phong, etc), only GLTF PBR materials.
         * by default standard materials are converted
             * but just the color and transparency is copied for now.
+
+    * `-excludeUnusedTexcoord (-eut)` *(optional)* 
+    	* exclude texture coordinates when the mesh primitive doesn't have textures? 
+        * by default texture coordinates are always exported
 	
     * `-defaultMaterial (-dm)` *(optional)* 
         * always generates a glTF PBR material, even if no material is assigned to a mesh in Maya

maya/scripts/maya2glTF_UI.mel

@@ -1,4 +1,4 @@
-proc string _quoted(string $text)
+proc string _quoted(string $text)
 {
 	string $quote = "\"";
 	return $quote+$text+$quote;
@@ -251,7 +251,7 @@ global proc maya2glTF_UI()
 	global string $gMainProgressBar;  
 
     // This is auto-updated by msbuild 
-	string $maya2glTF_version = "v0.9.6-beta 49a2d6f";
+	string $maya2glTF_version = "v0.9.6-beta 951aac1";
 
 	if (`window -exists maya2glTF_exporter_window`)
 		deleteUI maya2glTF_exporter_window;

src/ExportableAsset.cpp

@@ -139,7 +139,7 @@ void ExportableAsset::save()
 	const auto outputFolder = path(args.outputFolder.asChar());
 	create_directories(outputFolder);
 
-	const auto outputFilename = std::string(args.sceneName.asChar()) + (args.glb ? ".glb" : ".glTF");
+	const auto outputFilename = std::string(args.sceneName.asChar()) + (args.glb ? ".glb" : ".gltf");
 	const auto outputPath = outputFolder / outputFilename;
 
 	cout << prefix << "Writing glTF file to '" << outputPath << "'" << endl;

src/ExportableMaterial.cpp

@@ -47,6 +47,11 @@ bool ExportableMaterial::getScalar(const MObject& obj, const char* attributeName
 	return DagHelper::getPlugValue(obj, attributeName, scalar);
 }
 
+bool ExportableMaterial::getString(const MObject& obj, const char* attributeName, MString& string)
+{
+	return DagHelper::getPlugValue(obj, attributeName, string);
+}
+
 bool ExportableMaterial::getColor(const MObject& obj, const char* attributeName, Float4& color)
 {
 	MColor c;
@@ -177,17 +182,21 @@ void ExportableMaterialPBR::loadPBR(ExportableResources& resources, const MFnDep
 
 	Float4 customBaseColor = m_glBaseColorFactor;
 	float customBaseAlpha = m_glBaseColorFactor[3];
-	if (getColor(shaderObject, "u_BaseColorFactorRGB", customBaseColor) ||
-		getScalar(shaderObject, "u_BaseColorFactorA", customBaseAlpha))
+	MString technique = "solid";
+
+	const auto hasCustomColor = getColor(shaderObject, "u_BaseColorFactorRGB", customBaseColor);
+	const auto hasCustomAlpha = getScalar(shaderObject, "u_BaseColorFactorA", customBaseAlpha);
+	const auto hasTechnique = getString(shaderObject, "technique", technique);
+
+	if (hasCustomColor | hasCustomAlpha)
 	{
 		customBaseColor[3] = customBaseAlpha;
 		m_glBaseColorFactor = customBaseColor;
 		m_glMetallicRoughness.baseColorFactor = &m_glBaseColorFactor[0];
 		m_glMaterial.metallicRoughness = &m_glMetallicRoughness;
 	}
 
-	// TODO: Add transparency texture to our shader!
-	if (m_glBaseColorFactor[3] != 1)
+	if (hasTechnique && technique.toLowerCase() == "transparent")
 	{
 		m_glMaterial.alphaMode = "BLEND";
 	}

src/ExportableMaterial.h

@@ -24,6 +24,7 @@ class ExportableMaterial
 
 	static bool getScalar(const MObject& shaderObject, const char* attributeName, float& scalar);
 	static bool getColor(const MObject& shaderObject, const char* attributeName, Float4& color);
+	static bool getString(const MObject& shaderObject, const char* attributeName, MString& string);
 
 private:
 	DISALLOW_COPY_MOVE_ASSIGN(ExportableMaterial);

src/version.cpp

@@ -1,3 +1,3 @@
 #include "externals.h"
 
-const char* version = "v0.9.6-beta 49a2d6f";
+const char* version = "v0.9.6-beta 951aac1";