add getUnscaledMeshExtents to FBXGeometry

libraries/fbx/src/FBXReader.cpp

@@ -80,6 +80,19 @@ bool FBXGeometry::hasBlendedMeshes() const {
     return false;
 }
 
+Extents FBXGeometry::getUnscaledMeshExtents() const {
+    const Extents& extents = meshExtents;
+
+    // even though our caller asked for "unscaled" we need to include any fst scaling, translation, and rotation, which
+    // is captured in the offset matrix
+    glm::vec3 minimum = glm::vec3(offset * glm::vec4(extents.minimum, 1.0f));
+    glm::vec3 maximum = glm::vec3(offset * glm::vec4(extents.maximum, 1.0f));
+    Extents scaledExtents = { minimum, maximum };
+        
+    return scaledExtents;
+}
+
+
 static int fbxGeometryMetaTypeId = qRegisterMetaType<FBXGeometry>();
 static int fbxAnimationFrameMetaTypeId = qRegisterMetaType<FBXAnimationFrame>();
 static int fbxAnimationFrameVectorMetaTypeId = qRegisterMetaType<QVector<FBXAnimationFrame> >();

libraries/fbx/src/FBXReader.h

@@ -234,6 +234,9 @@ public:
     QStringList getJointNames() const;
     
     bool hasBlendedMeshes() const;
+
+    /// Returns the unscaled extents of the model's mesh
+    Extents getUnscaledMeshExtents() const;
 };
 
 Q_DECLARE_METATYPE(FBXGeometry)