Specular calculations for deferred lighting in progress

Have integrated the position of the directional light in the scene graph (imported from fbx) with the forward renderer and deferred lighting renderer's directional light angle

--HG--
extra : convert_revision : svn%3A7752d6cf-9f14-4ad2-affc-04f1e67b81a5/trunk%4048

KREngine/KREngine/Classes/KRCamera.h

@@ -35,6 +35,7 @@
 #import "KREngine-common.h"
 
 #import "KRMat4.h"
+#import "KRVector2.h"
 
 class KRCamera {
 public:
@@ -42,6 +43,8 @@ public:
     ~KRCamera();
     
     KRMat4 getProjectionMatrix();
+    const KRVector2 &getViewportSize();
+    void setViewportSize(const KRVector2 &size);
     
     bool bEnablePerPixel;
     bool bEnableDiffuseMap;
@@ -77,6 +80,8 @@ public:
     bool bEnableVignette;
     double vignette_radius;
     double vignette_falloff;
+    
+    KRVector2 m_viewportSize;
 };
 
 #endif