minor update

ScriptableRenderPipeline/HDRenderPipeline/HDCustomSamplerId.cs

         ForwardTransparentDepthPrepass,
         RenderForwardError,
         TransparentDepthPostPass,
-        Velocity,
+        ObjectsVelocity,
+        CameraVelocity,
         GaussianPyramidColor,
         PyramidDepth,
         PostProcessing,

ScriptableRenderPipeline/HDRenderPipeline/HDRenderPipeline.cs

             }
         }
 
-        void RenderObjectsVelocity(CullResults cullResults, HDCamera hdcam, ScriptableRenderContext renderContext, CommandBuffer cmd)
+        void RenderObjectsVelocity(CullResults cullResults, HDCamera hdcamera, ScriptableRenderContext renderContext, CommandBuffer cmd)
-            using (new ProfilingSample(cmd, "Velocity", GetSampler(CustomSamplerId.Velocity)))
+            using (new ProfilingSample(cmd, "Objects Velocity", GetSampler(CustomSamplerId.ObjectsVelocity)))
-                hdcam.camera.depthTextureMode |= DepthTextureMode.MotionVectors | DepthTextureMode.Depth;
-
-                int w = (int)hdcam.screenSize.x;
-                int h = (int)hdcam.screenSize.y;
+                hdcamera.camera.depthTextureMode |= DepthTextureMode.MotionVectors | DepthTextureMode.Depth;
-                RenderOpaqueRenderList(cullResults, hdcam.camera, renderContext, cmd, HDShaderPassNames.s_MotionVectorsName, RendererConfiguration.PerObjectMotionVectors);
+                RenderOpaqueRenderList(cullResults, hdcamera.camera, renderContext, cmd, HDShaderPassNames.s_MotionVectorsName, RendererConfiguration.PerObjectMotionVectors);
-        void RenderCameraVelocity(CullResults cullResults, HDCamera hdcam, ScriptableRenderContext renderContext, CommandBuffer cmd)
+        void RenderCameraVelocity(CullResults cullResults, HDCamera hdcamera, ScriptableRenderContext renderContext, CommandBuffer cmd)
-            using (new ProfilingSample(cmd, "Velocity", GetSampler(CustomSamplerId.Velocity)))
+            using (new ProfilingSample(cmd, "Camera Velocity", GetSampler(CustomSamplerId.CameraVelocity)))
-                hdcam.camera.depthTextureMode |= DepthTextureMode.MotionVectors | DepthTextureMode.Depth;
+                hdcamera.camera.depthTextureMode |= DepthTextureMode.MotionVectors | DepthTextureMode.Depth;
-                int w = (int)hdcam.screenSize.x;
-                int h = (int)hdcam.screenSize.y;
+                // TODO: This is not safe ? as we don't use cmd buffer we can have a delay no ?
+                m_CameraMotionVectorsMaterial.SetVector(HDShaderIDs._CameraPosDiff, hdcamera.prevCameraPos - hdcamera.cameraPos);
-                // TODO: This is not safe ? as we don't use cmd buffer we can have a dealy no ?
-                m_CameraMotionVectorsMaterial.SetVector(HDShaderIDs._CameraPosDiff, hdcam.prevCameraPos - hdcam.cameraPos);
+                // Setup stencil buffer
+                CoreUtils.DrawFullScreen(cmd, m_CameraMotionVectorsMaterial, m_VelocityBufferRT, m_CameraDepthStencilBufferRT, null, 0);
-                cmd.ReleaseTemporaryRT(m_VelocityBuffer);
-                cmd.GetTemporaryRT(m_VelocityBuffer, w, h, 0, FilterMode.Point, Builtin.GetVelocityBufferFormat(), Builtin.GetVelocityBufferReadWrite());
-                CoreUtils.DrawFullScreen(cmd, m_CameraMotionVectorsMaterial, m_VelocityBufferRT, null, 0);
-
-                PushFullScreenDebugTexture(cmd, m_VelocityBuffer, hdcam.camera, renderContext, FullScreenDebugMode.MotionVectors);
+                PushFullScreenDebugTexture(cmd, m_VelocityBuffer, hdcamera.camera, renderContext, FullScreenDebugMode.MotionVectors);
             }
         }