Added Dohya

Assets/Plugins/VolumetricLightBeam/Shaders/ShaderSpecificHDRP.hlsl

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+// The following comment prevents Unity from auto upgrading the shader. Please keep it to keep backward compatibility.
+// UNITY_SHADER_NO_UPGRADE
+
+#ifndef _VLB_SHADER_SPECIFIC_INCLUDED_
+#define _VLB_SHADER_SPECIFIC_INCLUDED_
+
+/////////////////////////////////////////////////////
+// Redefine missing functions from legacy pipeline
+/////////////////////////////////////////////////////
+inline float4 ComputeNonStereoScreenPos(float4 pos)
+{
+    float4 o = pos * 0.5f;
+    o.xy = float2(o.x, o.y * _ProjectionParams.x) + o.w;
+    o.zw = pos.zw;
+    return o;
+}
+
+#define TransformStereoScreenSpaceTex(uv, w) uv
+
+inline float4 ComputeScreenPos(float4 pos)
+{
+    float4 o = ComputeNonStereoScreenPos(pos);
+#if defined(UNITY_SINGLE_PASS_STEREO)
+    o.xy = TransformStereoScreenSpaceTex(o.xy, pos.w);
+#endif
+    return o;
+}
+/////////////////////////////////////////////////////
+
+// POSITION TRANSFORM
+inline float4 VLBObjectToClipPos(in float3 pos)     { return mul(UNITY_MATRIX_VP, mul(UNITY_MATRIX_M, float4(pos.xyz, 1.0))); }
+
+// Don't use UNITY_MATRIX_M directly here, because ApplyCameraTranslationToMatrix has been applied to it to substract the camera position.
+// But we can't use GetRawUnityObjectToWorld neither, since it doesn't work on Unity 2018.4.19 and HDRP 4.10.0 with GPUInstancing.
+// So we counter the effect of ApplyCameraTranslationToMatrix by adding the _WorldSpaceCameraPos back.
+inline float4 VLBObjectToWorldPos(in float4 pos)
+{
+    float4x4 modelMatrix = UNITY_MATRIX_M;
+
+#if (SHADEROPTIONS_CAMERA_RELATIVE_RENDERING != 0)
+    modelMatrix._m03_m13_m23 += _WorldSpaceCameraPos;
+#endif
+
+    return mul(modelMatrix, pos);
+}
+
+#define VLBObjectToViewPos(pos)                     (mul(UNITY_MATRIX_V, mul(UNITY_MATRIX_M, float4(pos.xyz, 1.0))).xyz)
+
+// FRUSTUM PLANES
+#define VLBFrustumPlanes _FrustumPlanes
+
+// CAMERA
+inline float3 __VLBWorldToObjectPos(in float3 pos) { return mul(UNITY_MATRIX_I_M, float4(pos, 1.0)).xyz; }
+inline float3 VLBGetCameraPositionObjectSpace(float3 scaleObjectSpace)
+{
+    // getting access directly to _WorldSpaceCameraPos gives wrong values
+    return __VLBWorldToObjectPos(GetCurrentViewPosition()) * scaleObjectSpace;
+}
+
+// DEPTH
+#define VLBSampleDepthTexture(/*float4*/uv) (SampleCameraDepth((uv.xy) / (uv.w)))
+#define VLBLinearEyeDepth(depth) LinearEyeDepth((depth), _ZBufferParams)
+
+#endif // _VLB_SHADER_SPECIFIC_INCLUDED_
+