Fix URP shader compiler warnings and update occlusion macros

Summary:
Shaders throw several warning as of Unity 6.3.10. This diff addresses these warnings.
Guard REQUIRES_WORLD_SPACE_POS_INTERPOLATOR macro redefinition with #ifndef
Zero-initialize v2f struct to suppress uninitialized variable warnings
Pass .xyz to META_DEPTH_INITIALIZE_VERTEX_OUTPUT to avoid implicit float4-to-float3 truncation
Replace deprecated META_DEPTH_OCCLUDE_OUTPUT_PREMULTIPLY_WORLDPOS_NAME with META_DEPTH_OCCLUDE_OUTPUT_PREMULTIPLY_WORLDPOS

Reviewed By: kyrylokuzyk-m

Differential Revision: D95209385

fbshipit-source-id: 97f31b699fce3a7cd8405d7a4f1ad1edc1875956

Author: TudorJude

DepthAPI-URP/Assets/DepthAPISample/Shaders/DepthUnlit.shader

@@ -84,7 +84,7 @@ Shader "Depth/Unlit"
 
                 // 5. World position is required to calculate the occlusions.
                 //    This macro will calculate and set world position value in the output Varyings structure.
-                META_DEPTH_INITIALIZE_VERTEX_OUTPUT(output, input.vertex);
+                META_DEPTH_INITIALIZE_VERTEX_OUTPUT(output, input.vertex.xyz);
 
                 // 6. Passes stereo information to frag shader
                 UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(output);

Packages/com.meta.xr.depthapi.urp/Shaders/OcclusionCutoutURP.shader

@@ -71,14 +71,14 @@ Shader "Meta/EnvironmentDepth/URP/OcclusionCutoutURP"
             float _EnvironmentDepthBias;
 
             v2f vert (appdata v) {
-                v2f o;
+                v2f o = (v2f)0;
 
                 UNITY_SETUP_INSTANCE_ID(v);
                 UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(o);
                 o.uv = TRANSFORM_TEX(v.uv, _MainTex);
                 o.vertex = TransformObjectToHClip(v.vertex.xyz);
 
-                META_DEPTH_INITIALIZE_VERTEX_OUTPUT(o, v.vertex);
+                META_DEPTH_INITIALIZE_VERTEX_OUTPUT(o, v.vertex.xyz);
 
                 return o;
             }

Packages/com.meta.xr.depthapi.urp/Shaders/StandardShaders/BakedLitForwardPass.hlsl

@@ -175,7 +175,7 @@ void BakedLitForwardPassFragment(
     finalColor.a = OutputAlpha(finalColor.a, _Surface);
 
 #if defined(HARD_OCCLUSION) || defined(SOFT_OCCLUSION)
-    META_DEPTH_OCCLUDE_OUTPUT_PREMULTIPLY_WORLDPOS_NAME(input, positionWS, finalColor, _EnvironmentDepthBias);
+    META_DEPTH_OCCLUDE_OUTPUT_PREMULTIPLY_WORLDPOS(input.positionWS, finalColor, _EnvironmentDepthBias);
 #endif
 
     outColor = finalColor;

Packages/com.meta.xr.depthapi.urp/Shaders/StandardShaders/LitForwardPass.hlsl

@@ -7,7 +7,9 @@
 #endif
 
 #if defined(HARD_OCCLUSION) || defined(SOFT_OCCLUSION)
-#define REQUIRES_WORLD_SPACE_POS_INTERPOLATOR 1
+  #ifndef REQUIRES_WORLD_SPACE_POS_INTERPOLATOR
+    #define REQUIRES_WORLD_SPACE_POS_INTERPOLATOR 1
+  #endif
 #endif
 
 #include "Packages/com.meta.xr.sdk.core/Shaders/EnvironmentDepth/URP/EnvironmentOcclusionURP.hlsl"

Packages/com.meta.xr.depthapi.urp/Shaders/StandardShaders/ParticlesUnlitForwardPass.hlsl

@@ -152,7 +152,7 @@ half4 fragParticleUnlit(VaryingsParticle input) : SV_Target
     finalColor.rgb = MixFog(finalColor.rgb, inputData.fogCoord);
     finalColor.a = OutputAlpha(finalColor.a, IsSurfaceTypeTransparent(_Surface));
 
-    META_DEPTH_OCCLUDE_OUTPUT_PREMULTIPLY_WORLDPOS_NAME(input, positionWS, finalColor, _EnvironmentDepthBias);
+    META_DEPTH_OCCLUDE_OUTPUT_PREMULTIPLY_WORLDPOS(input.positionWS, finalColor, _EnvironmentDepthBias);
 
     return finalColor;
 }

Packages/com.meta.xr.depthapi.urp/Shaders/StandardShaders/UnlitForwardPass.hlsl

@@ -162,7 +162,7 @@ void UnlitPassFragment(
     finalColor.a = OutputAlpha(finalColor.a, IsSurfaceTypeTransparent(_Surface));
 
  #if defined(HARD_OCCLUSION) || defined(SOFT_OCCLUSION)
-    META_DEPTH_OCCLUDE_OUTPUT_PREMULTIPLY_WORLDPOS_NAME(input, positionWS, finalColor, _EnvironmentDepthBias);
+    META_DEPTH_OCCLUDE_OUTPUT_PREMULTIPLY_WORLDPOS(input.positionWS, finalColor, _EnvironmentDepthBias);
 #endif
 
 

Packages/com.meta.xr.depthapi.urp/package.json

@@ -2,7 +2,7 @@
   "name": "com.meta.xr.depthapi.urp",
   "displayName": "Depth API URP support",
   "description": "Package with URP specific details",
-  "version": "77.0.0",
+  "version": "85.0.0",
   "unity": "2022.3",
   "unityRelease": "1f1"
 }

Packages/com.meta.xr.depthapi/CHANGELOG.md

@@ -1,3 +1,6 @@
+# 85.0.0
+* Fix shader compilation warnings in Unity 6000.x
+
 # 77.0.0
 * Add support for Unity 6.1's URP 17.1
 

Packages/com.meta.xr.depthapi/package.json

@@ -2,7 +2,7 @@
   "name": "com.meta.xr.depthapi",
   "displayName": "Depth API",
   "description": "This project gives useful tools to use with Depth API",
-  "version": "77.0.0",
+  "version": "85.0.0",
   "unity": "2022.3",
   "unityRelease": "1f1"
 }