From 51c868fd28bff8a7673307a5b1e1ecd681c22b31 Mon Sep 17 00:00:00 2001
From: Andrzej Kapolka <drzej.k@gmail.com>
Date: Thu, 3 Oct 2013 18:12:58 -0700
Subject: [PATCH] Apply (some) FBX material properties to rendered meshes.

---
 interface/src/avatar/BlendFace.cpp   | 16 +++++----
 interface/src/renderer/FBXReader.cpp | 50 +++++++++++++++++++++++++++-
 interface/src/renderer/FBXReader.h   |  5 +++
 3 files changed, 63 insertions(+), 8 deletions(-)

diff --git a/interface/src/avatar/BlendFace.cpp b/interface/src/avatar/BlendFace.cpp
index 321019b4a0..c88221c25b 100644
--- a/interface/src/avatar/BlendFace.cpp
+++ b/interface/src/avatar/BlendFace.cpp
@@ -88,8 +88,7 @@ bool BlendFace::render(float alpha) {
     // enable normalization under the expectation that the GPU can do it faster
     glEnable(GL_NORMALIZE); 
     glEnable(GL_TEXTURE_2D);
-    
-    glColor4f(_owningHead->getSkinColor().r, _owningHead->getSkinColor().g, _owningHead->getSkinColor().b, alpha);
+    glDisable(GL_COLOR_MATERIAL);
     
     for (int i = 0; i < networkMeshes.size(); i++) {
         const NetworkMesh& networkMesh = networkMeshes.at(i);
@@ -118,12 +117,12 @@ bool BlendFace::render(float alpha) {
             }
         }
         
-        glMultMatrixf((const GLfloat*)&mesh.transform);
+        // apply material properties
+        glMaterialfv(GL_FRONT, GL_DIFFUSE, (const float*)&mesh.diffuseColor);
+        glMaterialfv(GL_FRONT, GL_SPECULAR, (const float*)&mesh.specularColor);
+        glMaterialf(GL_FRONT, GL_SHININESS, mesh.shininess);
         
-        // all meshes after the first are white
-        if (i == 1) {
-            glColor4f(1.0f, 1.0f, 1.0f, alpha);
-        }
+        glMultMatrixf((const GLfloat*)&mesh.transform);
         
         glBindTexture(GL_TEXTURE_2D, texture == NULL ? 0 : texture->getID());
         
@@ -191,6 +190,9 @@ bool BlendFace::render(float alpha) {
     
     glPopMatrix();
 
+    // restore all the default material settings
+    Application::getInstance()->setupWorldLight(*Application::getInstance()->getCamera());
+
     return true;
 }
 
diff --git a/interface/src/renderer/FBXReader.cpp b/interface/src/renderer/FBXReader.cpp
index 24644866cd..2a048b4d3b 100644
--- a/interface/src/renderer/FBXReader.cpp
+++ b/interface/src/renderer/FBXReader.cpp
@@ -346,6 +346,14 @@ void printNode(const FBXNode& node, int indent) {
     }
 }
 
+class Material {
+public:
+    glm::vec4 ambient;
+    glm::vec4 diffuse;
+    glm::vec4 specular;
+    float shininess;
+};
+
 FBXGeometry extractFBXGeometry(const FBXNode& node, const QVariantHash& mapping) {
     QHash<qint64, FBXMesh> meshes;
     QVector<ExtractedBlendshape> blendshapes;
@@ -354,6 +362,7 @@ FBXGeometry extractFBXGeometry(const FBXNode& node, const QVariantHash& mapping)
     QHash<qint64, Transform> localTransforms;
     QHash<qint64, glm::mat4> transformLinkMatrices;
     QHash<qint64, QByteArray> textureFilenames;
+    QHash<qint64, Material> materials;
     QHash<qint64, qint64> diffuseTextures;
     QHash<qint64, qint64> bumpTextures;
     
@@ -578,6 +587,37 @@ FBXGeometry extractFBXGeometry(const FBXNode& node, const QVariantHash& mapping)
                             textureFilenames.insert(object.properties.at(0).value<qint64>(), filename);
                         }
                     }
+                } else if (object.name == "Material") {
+                    Material material = { glm::vec4(1.0f, 1.0f, 1.0f, 1.0f), glm::vec4(1.0f, 1.0f, 1.0f, 1.0f),
+                        glm::vec4(1.0f, 1.0f, 1.0f, 1.0f), 96.0f };
+                    foreach (const FBXNode& subobject, object.children) {
+                        if (subobject.name == "Properties70") {        
+                            foreach (const FBXNode& property, subobject.children) {
+                                if (property.name == "P") {
+                                    if (property.properties.at(0) == "AmbientColor") {
+                                        material.ambient = glm::vec4(property.properties.at(4).value<double>(),
+                                            property.properties.at(5).value<double>(),
+                                            property.properties.at(6).value<double>(), 1.0f);
+                                        
+                                    } else if (property.properties.at(0) == "DiffuseColor") {
+                                        material.diffuse = glm::vec4(property.properties.at(4).value<double>(),
+                                            property.properties.at(5).value<double>(),
+                                            property.properties.at(6).value<double>(), 1.0f);
+                                        
+                                    } else if (property.properties.at(0) == "SpecularColor") {
+                                        material.specular = glm::vec4(property.properties.at(4).value<double>(),
+                                            property.properties.at(5).value<double>(),
+                                            property.properties.at(6).value<double>(), 1.0f);
+                                    
+                                    } else if (property.properties.at(0) == "Shininess") {
+                                        material.shininess = property.properties.at(4).value<double>();
+                                    }
+                                }
+                            }
+                        }
+                    }
+                    materials.insert(object.properties.at(0).value<qint64>(), material);
+                    
                 } else if (object.name == "Deformer") {
                     if (object.properties.at(2) == "Cluster") {
                         foreach (const FBXNode& subobject, object.children) {
@@ -641,8 +681,16 @@ FBXGeometry extractFBXGeometry(const FBXNode& node, const QVariantHash& mapping)
         qint64 modelID = parentMap.value(it.key());
         glm::mat4 modelTransform = getGlobalTransform(parentMap, localTransforms, modelID);
         
-        // look for textures
+        // look for textures, material properties
         foreach (qint64 childID, childMap.values(modelID)) {
+            if (!materials.contains(childID)) {
+                continue;
+            }
+            Material material = materials.value(childID);
+            mesh.ambientColor = material.ambient;
+            mesh.diffuseColor = material.diffuse;
+            mesh.specularColor = material.specular;
+            mesh.shininess = material.shininess;
             qint64 diffuseTextureID = diffuseTextures.value(childID);
             if (diffuseTextureID != 0) {
                 mesh.diffuseFilename = textureFilenames.value(diffuseTextureID);
diff --git a/interface/src/renderer/FBXReader.h b/interface/src/renderer/FBXReader.h
index f84a06468e..77568072c4 100644
--- a/interface/src/renderer/FBXReader.h
+++ b/interface/src/renderer/FBXReader.h
@@ -51,6 +51,11 @@ public:
     
     bool isEye;
     
+    glm::vec4 ambientColor;
+    glm::vec4 diffuseColor;
+    glm::vec4 specularColor;
+    float shininess;
+    
     QByteArray diffuseFilename;
     QByteArray normalFilename;