Adding basic CBT Terrain implementation

res/shaders/lib/Common.slang

@@ -6,12 +6,17 @@ static const uint32_t MESH_GROUP_SIZE = 32;
 
 struct ViewParameter
 {
+    Frustum viewFrustum;
     float4x4 viewMatrix;
     float4x4 inverseViewMatrix;
     float4x4 projectionMatrix;
     float4x4 inverseProjection;
-    float4 cameraPos_WS;
+    float4 cameraPosition_WS;
+    float4 cameraForward_WS;
     float2 screenDimensions;
+    float2 invScreenDimensions;
+    uint frameIndex;
+    float time;
 };
 layout(set = 0)
 ParameterBlock<ViewParameter> pViewParams;

res/shaders/lib/MaterialParameter.slang

@@ -51,7 +51,7 @@ struct FragmentParameter
 		float3x3 tbn = float3x3(normalize(tangent_WS), normalize(biTangent_WS), normalize(normal_WS));
 		result.tbn = tbn;
         result.position_TS = mul(tbn, position_WS);
-        result.viewDir_TS = mul(tbn, normalize(pViewParams.cameraPos_WS.xyz - position_WS));
+        result.viewDir_TS = mul(tbn, normalize(pViewParams.cameraPosition_WS.xyz - position_WS));
         result.normal_TS = mul(tbn, normal_WS);
 		return result;
 	}