update headers

ios/include/filament/RenderableManager.h

@@ -40,7 +40,6 @@ namespace filament {
 class BufferObject;
 class Engine;
 class IndexBuffer;
-class Material;
 class MaterialInstance;
 class Renderer;
 class SkinningBuffer;
@@ -161,10 +160,17 @@ public:
         /**
          * Binds a material instance to the specified primitive.
          *
-         * If no material is specified for a given primitive, Filament will fall back to a basic default material.
+         * If no material is specified for a given primitive, Filament will fall back to a basic
+         * default material.
          *
-         * @param index zero-based index of the primitive, must be less than the count passed to Builder constructor
+         * The MaterialInstance's material must have a feature level equal or lower to the engine's
+         * selected feature level.
+         *
+         * @param index zero-based index of the primitive, must be less than the count passed to
+         * Builder constructor
          * @param materialInstance the material to bind
+         *
+         * @see Engine::setActiveFeatureLevel
          */
         Builder& material(size_t index, MaterialInstance const* materialInstance) noexcept;
 
@@ -560,6 +566,11 @@ public:
     inline void setMorphTargetBufferAt(Instance instance, uint8_t level, size_t primitiveIndex,
             MorphTargetBuffer* morphTargetBuffer);
 
+    /**
+     * Get a MorphTargetBuffer to the given primitive or null if it doesn't exist.
+     */
+    MorphTargetBuffer* getMorphTargetBufferAt(Instance instance, uint8_t level, size_t primitiveIndex) const noexcept;
+
     /**
      * Gets the number of morphing in the given entity.
      */
@@ -590,10 +601,17 @@ public:
     /**
      * Changes the material instance binding for the given primitive.
      *
-     * \see Builder::material()
+     * The MaterialInstance's material must have a feature level equal or lower to the engine's
+     * selected feature level.
+     *
+     * @exception utils::PreConditionPanic if the engine doesn't support the material's
+     *                                     feature level.
+     *
+     * @see Builder::material()
+     * @see Engine::setActiveFeatureLevel
      */
     void setMaterialInstanceAt(Instance instance,
-            size_t primitiveIndex, MaterialInstance const* materialInstance) noexcept;
+            size_t primitiveIndex, MaterialInstance const* materialInstance);
 
     /**
      * Retrieves the material instance that is bound to the given primitive.