updated MVPMatrix struct

inc/hgl/graph/SceneInfo.h

@@ -1,4 +1,4 @@
-#ifndef HGL_GRAPH_SCENE_INFO_INCLUDE
+#ifndef HGL_GRAPH_SCENE_INFO_INCLUDE
 #define HGL_GRAPH_SCENE_INFO_INCLUDE
 
 #include<hgl/math/Matrix.h>
@@ -8,25 +8,25 @@ namespace hgl
     namespace graph
     {
         /** 
-         * MVP<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
+         * MVP矩阵
          */
         struct MVPMatrix
         {
             Matrix4f l2w;                   ///< Local to World
-            Matrix4f inverse_l2w;
+                                            //Matrix4f normal;                ///<transpose(inverse(mat3(l2w)));
+            Matrix3x4f normal;              ///<这里用3x4，在Shader中是3x3(但实际它是3x4保存)
 
+            Matrix4f mv;                    ///< view * local_to_world
             Matrix4f mvp;                   ///< projection * view * local_to_world
-            Matrix4f inverse_mvp;
 
         public:
 
-            void Set(const Matrix4f &w,const Matrix4f &vp)
+            void Set(const Matrix4f &w,const Matrix4f &vp,const Matrix4f &v)
             {
                 l2w=w;
-                inverse_l2w=inverse(l2w);
-
+                normal=transpose(inverse(l2w));
+                mv=v*l2w;
                 mvp=vp*l2w;
-                inverse_mvp=inverse(mvp);
             }
 
             CompOperatorMemcmp(const MVPMatrix &);