Adds shadow pass support for standard shader

com.microsoft.mrtk.graphicstools.unity/Runtime/Shaders/GraphicsToolsLighting.hlsl

@@ -17,7 +17,7 @@ struct GTMainLight
 GTMainLight GTGetMainLight()
 {
     GTMainLight light;
-#if defined(_DIRECTIONAL_LIGHT) || defined(_DISTANT_LIGHT)
+#if defined(_DIRECTIONAL_LIGHT) || defined(_DISTANT_LIGHT) || defined(_SHADOW_PASS)
 #if defined(_DISTANT_LIGHT)
     light.direction = _DistantLightData[0].xyz;
     light.color = _DistantLightData[1].xyz;

com.microsoft.mrtk.graphicstools.unity/Runtime/Shaders/GraphicsToolsStandard.shader

@@ -189,6 +189,30 @@ Shader "Graphics Tools/Standard"
             ENDHLSL
         }
 
+        Pass
+        {
+            Name "ShadowCaster"
+            Tags{"LightMode" = "ShadowCaster"}
+
+            ZWrite On
+            ZTest LEqual
+            ColorMask 0
+            Cull[_CullMode]
+
+            HLSLPROGRAM
+
+            #define _URP
+            #define _SHADOW_PASS
+
+            #pragma multi_compile_instancing
+
+            #pragma shader_feature_local_fragment _CLIPPING_BORDER
+
+            #include_with_pragmas "GraphicsToolsStandardProgram.hlsl"
+
+            ENDHLSL
+        }
+
         // Extracts information for lightmapping, GI (emission, albedo, ...)
         // This pass it not used during regular rendering.
         Pass

com.microsoft.mrtk.graphicstools.unity/Runtime/Shaders/GraphicsToolsStandardProgram.hlsl

@@ -8,45 +8,49 @@
 #pragma fragment PixelStage
 
 // Comment in to help with RenderDoc debugging.
-//#pragma enable_d3d11_debug_symbols
+#pragma enable_d3d11_debug_symbols
 
 /// <summary>
 /// Features.
 /// </summary>
 
 #pragma multi_compile_local _ _CLIPPING_PLANE _CLIPPING_SPHERE _CLIPPING_BOX
 
-#pragma shader_feature_local _ _ALPHATEST_ON _ALPHABLEND_ON _ALPHABLEND_TRANS_ON _ADDITIVE_ON
+#pragma shader_feature_local _ _ALPHATEST_ON
 #pragma shader_feature_local _DISABLE_ALBEDO_MAP
 #pragma shader_feature_local_fragment _ _METALLIC_TEXTURE_ALBEDO_CHANNEL_A _SMOOTHNESS_TEXTURE_ALBEDO_CHANNEL_A
 #pragma shader_feature_local _CHANNEL_MAP
+#pragma shader_feature_local _ _DIRECTIONAL_LIGHT _DISTANT_LIGHT
+#pragma shader_feature_local _VERTEX_COLORS
+#pragma shader_feature_local _VERTEX_EXTRUSION
+#pragma shader_feature_local_vertex _VERTEX_EXTRUSION_SMOOTH_NORMALS
+#pragma shader_feature_local_vertex _VERTEX_EXTRUSION_CONSTANT_WIDTH
+#pragma shader_feature_local _NEAR_PLANE_FADE
+#pragma shader_feature_local_vertex _NEAR_LIGHT_FADE
+#pragma shader_feature_local _ROUND_CORNERS
+#pragma shader_feature_local_fragment _INDEPENDENT_CORNERS
+#pragma shader_feature_local_fragment _ROUND_CORNERS_HIDE_INTERIOR
+#pragma shader_feature_local_fragment _ _EDGE_SMOOTHING_AUTOMATIC
+#pragma shader_feature_local _USE_WORLD_SCALE
+
+#if !defined(_SHADOW_PASS)
+#pragma shader_feature_local _ _ALPHABLEND_ON _ALPHABLEND_TRANS_ON _ADDITIVE_ON
 #pragma shader_feature_local _NORMAL_MAP
 #pragma shader_feature_local _EMISSION
 #pragma shader_feature_local _TRIPLANAR_MAPPING
 #pragma shader_feature_local _LOCAL_SPACE_TRIPLANAR_MAPPING
 #pragma shader_feature_local_fragment _USE_SSAA
-#pragma shader_feature_local _ _DIRECTIONAL_LIGHT _DISTANT_LIGHT
 #pragma shader_feature_local _NON_PHOTOREALISTIC
 #pragma shader_feature_local_fragment _SPECULAR_HIGHLIGHTS
 #pragma shader_feature_local _SPHERICAL_HARMONICS
 #pragma shader_feature_local _REFLECTIONS
 #pragma shader_feature_local _RIM_LIGHT
-#pragma shader_feature_local _VERTEX_COLORS
-#pragma shader_feature_local _VERTEX_EXTRUSION
-#pragma shader_feature_local_vertex _VERTEX_EXTRUSION_SMOOTH_NORMALS
-#pragma shader_feature_local_vertex _VERTEX_EXTRUSION_CONSTANT_WIDTH
-#pragma shader_feature_local _NEAR_PLANE_FADE
-#pragma shader_feature_local_vertex _NEAR_LIGHT_FADE
 #pragma shader_feature_local _HOVER_LIGHT
 #pragma shader_feature_local_fragment _HOVER_COLOR_OVERRIDE
 #pragma shader_feature_local _PROXIMITY_LIGHT
 #pragma shader_feature_local_fragment _PROXIMITY_LIGHT_COLOR_OVERRIDE
 #pragma shader_feature_local_fragment _PROXIMITY_LIGHT_SUBTRACTIVE
 #pragma shader_feature_local _PROXIMITY_LIGHT_TWO_SIDED
-#pragma shader_feature_local _ROUND_CORNERS
-#pragma shader_feature_local_fragment _INDEPENDENT_CORNERS
-#pragma shader_feature_local_fragment _ROUND_CORNERS_HIDE_INTERIOR
-#pragma shader_feature_local_fragment _ _EDGE_SMOOTHING_AUTOMATIC
 #pragma shader_feature_local _BORDER_LIGHT
 #pragma shader_feature_local_fragment _ _BORDER_LIGHT_USES_HOVER_COLOR _BORDER_LIGHT_USES_COLOR _BORDER_LIGHT_USES_GRADIENT
 #pragma shader_feature_local_fragment _BORDER_LIGHT_REPLACES_ALBEDO
@@ -55,7 +59,7 @@
 #pragma shader_feature_local _ _IRIDESCENCE _GRADIENT_FOUR_POINT _GRADIENT_LINEAR
 #pragma shader_feature_local _ENVIRONMENT_COLORING
 #pragma shader_feature_local _ _BLUR_TEXTURE _BLUR_TEXTURE_2 _BLUR_TEXTURE_PREBAKED_BACKGROUND
-#pragma shader_feature_local _USE_WORLD_SCALE
+#endif
 
 /// <summary>
 ///  Defines and includes.
@@ -169,7 +173,7 @@ Varyings VertexStage(Attributes input)
 #endif
 #endif
 #endif
-
+    
     half3 localNormal = input.normal;
 
 #if defined(_NORMAL) || defined(_VERTEX_EXTRUSION)
@@ -244,28 +248,21 @@ Varyings VertexStage(Attributes input)
 
 #if defined(_BORDER_LIGHT) || defined(_ROUND_CORNERS)
     output.uv = input.uv;
-
-#if defined(_USE_WORLD_SCALE)
-    output.scale.z = canvasScale;
- #else
-    float minScale = min(min(output.scale.x, output.scale.y), output.scale.z);
-#endif
-
+
     if (abs(localNormal.x) == 1.0) // Y,Z plane.
     {
         output.scale.x = output.scale.z;
-        output.scale.y = output.scale.y;
     }
     else if (abs(localNormal.y) == 1.0) // X,Z plane.
     {
-        output.scale.x = output.scale.x;
         output.scale.y = output.scale.z;
-    }
-    // Else X,Y plane.
-
-#if !defined(_USE_WORLD_SCALE)
-    output.scale.z = minScale;
-#endif
+    } // Else X,Y plane.
+
+    #if defined(_USE_WORLD_SCALE)
+        output.scale.z = canvasScale;
+    #else
+        output.scale.z = min(min(output.scale.x, output.scale.y), output.scale.z);
+    #endif
 
 #elif defined(_UV)
     output.uv = TRANSFORM_TEX(input.uv, _MainTex);
@@ -516,7 +513,7 @@ half4 PixelStage(Varyings input, bool facing : SV_IsFrontFace) : SV_Target
     _RoundCornersRadius = clamp(_RoundCornersRadius, 0.0h, 0.5h);
 #endif
     currentCornerRadius = GTFindCornerRadius(input.uv.xy, _RoundCornersRadius);
-#else 
+#else
     currentCornerRadius = _RoundCornerRadius;
 #endif
 #else
@@ -763,6 +760,11 @@ half4 PixelStage(Varyings input, bool facing : SV_IsFrontFace) : SV_Target
     albedo.a = 1.0;
 #endif
 
+#if defined(_SHADOW_PASS)
+	// Return early to avoid unnecessary calculations for shadow pass.
+    return 0;
+#endif
+
     // Final lighting mix.
     half4 output = albedo;