Merge pull request #415 from Unity-Technologies/Branch_FixDepthPassNormal

Fixed Vertex Normal usage in vertex shaders when needed by the Wind.

ScriptableRenderPipeline/HDRenderPipeline/Material/Lit/ShaderPass/LitDepthPass.hlsl

 // This first set of define allow to say which attributes will be use by the mesh in the vertex and domain shader (for tesselation)
 
 // Tesselation require normal
-#if defined(TESSELLATION_ON) || REQUIRE_TANGENT_TO_WORLD
+#if defined(TESSELLATION_ON) || REQUIRE_TANGENT_TO_WORLD || defined(_VERTEX_WIND)
 #define ATTRIBUTES_NEED_NORMAL
 #endif
 #if REQUIRE_TANGENT_TO_WORLD

ScriptableRenderPipeline/HDRenderPipeline/Material/Lit/ShaderPass/LitDistortionPass.hlsl

 // This first set of define allow to say which attributes will be use by the mesh in the vertex and domain shader (for tesselation)
 
 // Tesselation require normal
-#if defined(TESSELLATION_ON) || REQUIRE_TANGENT_TO_WORLD
+#if defined(TESSELLATION_ON) || REQUIRE_TANGENT_TO_WORLD || defined(_VERTEX_WIND)
 #define ATTRIBUTES_NEED_NORMAL
 #endif
 #if REQUIRE_TANGENT_TO_WORLD

ScriptableRenderPipeline/HDRenderPipeline/Material/Lit/ShaderPass/LitMetaPass.hlsl

-#ifndef SHADERPASS
+#ifndef SHADERPASS
 #error Undefine_SHADERPASS
 #endif
 
 
 #ifdef _VERTEX_WIND
 #define ATTRIBUTES_NEED_COLOR
+#define ATTRIBUTES_NEED_NORMAL
 #endif
 
 #if defined(LAYERED_LIT_SHADER) && (defined(_LAYER_MASK_VERTEX_COLOR_MUL) || defined(_LAYER_MASK_VERTEX_COLOR_ADD))

ScriptableRenderPipeline/HDRenderPipeline/Material/Lit/ShaderPass/LitVelocityPass.hlsl

 #define REQUIRE_TANGENT_TO_WORLD 0 /* (defined(_HEIGHTMAP) && defined(_PER_PIXEL_DISPLACEMENT)) */
 
 // This first set of define allow to say which attributes will be use by the mesh in the vertex and domain shader (for tesselation)
-
-#if defined(TESSELLATION_ON) || REQUIRE_TANGENT_TO_WORLD
+#if defined(TESSELLATION_ON) || REQUIRE_TANGENT_TO_WORLD || defined(_VERTEX_WIND)
 // #define ATTRIBUTES_NEED_NORMAL - When reenable, think to also enable code in VertMesh.hlsl
 #endif
 #if REQUIRE_TANGENT_TO_WORLD

ScriptableRenderPipeline/HDRenderPipeline/ShaderPass/VertMesh.hlsl

     VaryingsMeshType output;
 
     float3 positionWS = TransformObjectToWorld(input.positionOS);
-    float3 normalWS = float3(0.0, 0.0, 0.0);
+#if defined(ATTRIBUTES_NEED_NORMAL)
+    float3 normalWS = TransformObjectToWorldNormal(input.normalOS);
+#endif
-
-#if (defined(VARYINGS_NEED_TANGENT_TO_WORLD) || defined(TESSELLATION_ON)) && (SHADERPASS != SHADERPASS_VELOCITY)
-    normalWS = TransformObjectToWorldNormal(input.normalOS);
-#endif
 
 #if defined(VARYINGS_NEED_TANGENT_TO_WORLD) || defined(VARYINGS_DS_NEED_TANGENT)
     tangentWS = float4(TransformObjectToWorldDir(input.tangentOS.xyz), input.tangentOS.w);