Add _FrustumParams to UnityPerView

ScriptableRenderPipeline/HDRenderPipeline/HDRP/Camera/HDCamera.cs

         public uint      taaFrameIndex;
         public Vector2   taaFrameRotation;
         public Vector4   depthBufferParams;
+        public Vector4   frustumParams;
 
         public PostProcessRenderContext postprocessRenderContext;
 
                 depthBufferParams = new Vector4(1 - f/n, f/n, 1/f - 1/n, 1/n);
             }
 
+            float orthoHeight = camera.orthographic ? 2 * camera.orthographicSize : 0;
+            float orthoWidth  = orthoHeight * camera.aspect;
+            frustumParams     = new Vector4(n, f, orthoWidth, orthoHeight);
+
             frustum = Frustum.Create(viewProjMatrix, depth_0_1, reverseZ);
 
             // Left, right, top, bottom, near, far.
             cmd.SetGlobalVector(HDShaderIDs._ScreenSize,                screenSize);
             cmd.SetGlobalVector(HDShaderIDs._ScreenToTargetScale,       scaleBias);
             cmd.SetGlobalVector(HDShaderIDs._DepthBufferParams,         depthBufferParams);
-            cmd.SetGlobalVector(HDShaderIDs._InvProjParam,              invProjParam);
+            cmd.SetGlobalVector(HDShaderIDs._FrustumParams,             frustumParams);
             cmd.SetGlobalVector(HDShaderIDs._TaaFrameRotation,          taaFrameRotation);
             cmd.SetGlobalVectorArray(HDShaderIDs._FrustumPlanes,        frustumPlaneEquations);
         }

ScriptableRenderPipeline/HDRenderPipeline/HDRP/HDStringConstants.cs

         public static readonly int _InvViewProjMatrix = Shader.PropertyToID("_InvViewProjMatrix");
         public static readonly int _DetViewMatrix = Shader.PropertyToID("_DetViewMatrix");
         public static readonly int _DepthBufferParams = Shader.PropertyToID("_DepthBufferParams");
+        public static readonly int _FrustumParams = Shader.PropertyToID("_FrustumParams");
         public static readonly int _InvProjParam = Shader.PropertyToID("_InvProjParam");
         public static readonly int _ScreenSize = Shader.PropertyToID("_ScreenSize");
         public static readonly int _ScreenToTargetScale = Shader.PropertyToID("_ScreenToTargetScale");

ScriptableRenderPipeline/HDRenderPipeline/HDRP/ShaderVariables.hlsl

     // w = 1/f
     float4 _DepthBufferParams;
 
+    // x = near plane
+    // y = far plane
+    // z = orthographic camera's width  (0 if perspective)
+    // w = orthographic camera's height (0 if perspective)
+    float4 _FrustumParams;
+
     // TAA Frame Index ranges from 0 to 7. This gives you two rotations per cycle.
     float4 _TaaFrameRotation;     // { sin(taaFrame * PI/2), cos(taaFrame * PI/2), 0, 0 }