render stencil portals (transparent)

Assets/Portal/Assets/Materials/PortalDepth.mat

@@ -0,0 +1,30 @@
+%YAML 1.1
+%TAG !u! tag:unity3d.com,2011:
+--- !u!21 &2100000
+Material:
+  serializedVersion: 8
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_Name: PortalDepth
+  m_Shader: {fileID: 4800000, guid: 9c438221637f2c0439e5af0dadf1f829, type: 3}
+  m_Parent: {fileID: 0}
+  m_ModifiedSerializedProperties: 0
+  m_ValidKeywords: []
+  m_InvalidKeywords: []
+  m_LightmapFlags: 4
+  m_EnableInstancingVariants: 0
+  m_DoubleSidedGI: 0
+  m_CustomRenderQueue: -1
+  stringTagMap: {}
+  disabledShaderPasses: []
+  m_LockedProperties: 
+  m_SavedProperties:
+    serializedVersion: 3
+    m_TexEnvs: []
+    m_Ints: []
+    m_Floats:
+    - _PortalNumber: 0
+    m_Colors: []
+  m_BuildTextureStacks: []

Assets/Portal/Assets/Materials/PortalDepth.mat.meta

@@ -0,0 +1,8 @@
+fileFormatVersion: 2
+guid: b788aaf4ec13aab459f370617052b5c1
+NativeFormatImporter:
+  externalObjects: {}
+  mainObjectFileID: 2100000
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Portal/Assets/Materials/PortalDepth.shader

@@ -0,0 +1,12 @@
+Shader "Escape Room Engine/PortalDepth" {
+    SubShader {
+        Pass {
+            ColorMask 0
+
+            Stencil {
+                Ref 1
+                Comp LEqual
+            }
+        }
+    }
+}

Assets/Portal/Assets/Materials/PortalDepth.shader.meta

@@ -0,0 +1,9 @@
+fileFormatVersion: 2
+guid: 9c438221637f2c0439e5af0dadf1f829
+ShaderImporter:
+  externalObjects: {}
+  defaultTextures: []
+  nonModifiableTextures: []
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Portal/Assets/Prefabs/Portal.prefab

@@ -12,7 +12,7 @@ GameObject:
   - component: {fileID: 8547629936759508216}
   - component: {fileID: 5871497001431693362}
   m_Layer: 7
-  m_Name: Portal Screen
+  m_Name: Screen
   m_TagString: Untagged
   m_Icon: {fileID: 0}
   m_NavMeshLayer: 0
@@ -25,14 +25,14 @@ Transform:
   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 5366957160841664999}
-  m_LocalRotation: {x: 0.7071068, y: 0, z: 0, w: 0.7071067}
+  m_LocalRotation: {x: 0.7071068, y: 0, z: 0, w: 0.7071068}
   m_LocalPosition: {x: 0, y: 0, z: 0}
   m_LocalScale: {x: 1, y: 1, z: 1}
   m_ConstrainProportionsScale: 0
   m_Children: []
   m_Father: {fileID: 2246995198243242195}
   m_RootOrder: 0
-  m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
+  m_LocalEulerAnglesHint: {x: 90, y: 0, z: 0}
 --- !u!33 &8547629936759508216
 MeshFilter:
   m_ObjectHideFlags: 0
@@ -134,7 +134,6 @@ MonoBehaviour:
   linkedPortal: {fileID: 0}
   minNearClipPlane: 0.0001
   screen: {fileID: 5871497001431693362}
-  cameraTransform: {fileID: 0}
   portalTransform: {fileID: 2246995198243242195}
 --- !u!65 &7604291350124895408
 BoxCollider:
@@ -182,14 +181,14 @@ Transform:
   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 8470391359842711396}
-  m_LocalRotation: {x: 0.7071068, y: 0, z: 0, w: 0.7071067}
+  m_LocalRotation: {x: 0.7071068, y: 0, z: 0, w: 0.7071068}
   m_LocalPosition: {x: 0, y: 0, z: 0}
   m_LocalScale: {x: 1, y: 1, z: 1}
   m_ConstrainProportionsScale: 0
   m_Children: []
   m_Father: {fileID: 2246995198243242195}
   m_RootOrder: 1
-  m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
+  m_LocalEulerAnglesHint: {x: 90, y: 0, z: 0}
 --- !u!33 &5289736326143877755
 MeshFilter:
   m_ObjectHideFlags: 0

Assets/Portal/Runtime/FullScreenDepth.cs

@@ -0,0 +1,55 @@
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.Rendering;
+using UnityEngine.Rendering.Universal;
+
+namespace EscapeRoomEngine.Portal.Runtime
+{
+    public class FullScreenDepth : ScriptableRendererFeature
+    {
+        private class RenderPass : ScriptableRenderPass
+        {
+            private RenderStateBlock _renderStateBlock;
+
+            private readonly LayerMask _layer;
+
+            public RenderPass(LayerMask layer, RenderPassEvent renderPassEvent)
+            {
+                _layer = layer;
+                
+                this.renderPassEvent = renderPassEvent;
+                _renderStateBlock = new RenderStateBlock(RenderStateMask.Nothing);
+            }
+
+            public override void Execute(ScriptableRenderContext context, ref RenderingData renderingData)
+            {
+                var sortingCriteria = renderingData.cameraData.defaultOpaqueSortFlags;
+                var drawingSettings =
+                    CreateDrawingSettings(
+                        new List<ShaderTagId>
+                        {
+                            new("SRPDefaultUnlit"), new("UniversalForward"), new("UniversalForwardOnly")
+                        },
+                        ref renderingData, sortingCriteria);
+
+                var filteringSettings = new FilteringSettings(RenderQueueRange.opaque, _layer);
+                context.DrawRenderers(renderingData.cullResults, ref drawingSettings, ref filteringSettings, ref _renderStateBlock);
+            }
+        }
+
+        private RenderPass _renderPass;
+
+        public LayerMask layer;
+        public RenderPassEvent renderPassEvent = RenderPassEvent.AfterRenderingOpaques;
+
+        public override void Create()
+        {
+            _renderPass = new RenderPass(layer, renderPassEvent);
+        }
+
+        public override void AddRenderPasses(ScriptableRenderer renderer, ref RenderingData renderingData)
+        {
+            renderer.EnqueuePass(_renderPass);
+        }
+    }
+}

Assets/Portal/Runtime/FullScreenDepth.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 7ace2de170db48acb344b9e43cb6524e
+timeCreated: 1682972259

Assets/Portal/Runtime/Portal.cs

@@ -26,9 +26,10 @@ namespace EscapeRoomEngine.Portal.Runtime
         /// </summary>
         public float minNearClipPlane = 0.0001f;
         /// <summary>
-        /// The mesh where the portal will be drawn.
+        /// The meshes where the portal will draw its stencil and depth.
         /// </summary>
-        [BoxGroup("Internal")] public MeshRenderer screen;
+        [BoxGroup("Internal")] [SerializeField]
+        private MeshRenderer screen;
         /// <summary>
         /// The transform marking the edge of the portal plane.
         /// </summary>

Assets/Portal/Runtime/RenderPortalCameras.cs

@@ -32,7 +32,7 @@ namespace EscapeRoomEngine.Portal.Runtime
                 _layers = layers;
                 _passType = passType;
 
-                renderPassEvent = RenderPassEvent.AfterRenderingOpaques;
+                renderPassEvent = passType == PassType.Opaque ? RenderPassEvent.AfterRenderingOpaques : RenderPassEvent.BeforeRenderingTransparents;
                 _renderStateBlock = new RenderStateBlock(RenderStateMask.Nothing);
 
                 // set stencil
@@ -107,7 +107,7 @@ namespace EscapeRoomEngine.Portal.Runtime
         public override void AddRenderPasses(ScriptableRenderer renderer, ref RenderingData renderingData)
         {
             renderer.EnqueuePass(_opaquePass);
-            // renderer.EnqueuePass(_transparentPass); TODO: enable
+            renderer.EnqueuePass(_transparentPass);
         }
     }
 }

Assets/Portal/Runtime/RenderPortals.cs

@@ -7,17 +7,19 @@ namespace EscapeRoomEngine.Portal.Runtime
 {
     public class RenderPortals : ScriptableRendererFeature
     {
-        private class PortalRenderPass : ScriptableRenderPass
+        private class RenderPass : ScriptableRenderPass
         {
             private RenderStateBlock _renderStateBlock;
 
-            private readonly LayerMask _layers;
+            private readonly LayerMask _layer;
+            private readonly Material _overwriteMaterial;
 
-            public PortalRenderPass(LayerMask layers)
+            public RenderPass(LayerMask layer, Material overwriteMaterial, RenderPassEvent renderPassEvent)
             {
-                _layers = layers;
+                _layer = layer;
+                _overwriteMaterial = overwriteMaterial;
                 
-                renderPassEvent = RenderPassEvent.AfterRenderingOpaques;
+                this.renderPassEvent = renderPassEvent;
                 _renderStateBlock = new RenderStateBlock(RenderStateMask.Nothing);
             }
 
@@ -31,24 +33,30 @@ namespace EscapeRoomEngine.Portal.Runtime
                             new("SRPDefaultUnlit"), new("UniversalForward"), new("UniversalForwardOnly")
                         },
                         ref renderingData, sortingCriteria);
+                if (_overwriteMaterial)
+                {
+                    drawingSettings.overrideMaterial = _overwriteMaterial;
+                }
 
-                var filteringSettings = new FilteringSettings(RenderQueueRange.opaque, _layers);
+                var filteringSettings = new FilteringSettings(RenderQueueRange.opaque, _layer);
                 context.DrawRenderers(renderingData.cullResults, ref drawingSettings, ref filteringSettings, ref _renderStateBlock);
             }
         }
 
-        private PortalRenderPass _portalPass;
+        private RenderPass _renderPass;
 
-        public LayerMask layers;
+        public LayerMask layer;
+        public Material overwriteMaterial;
+        public RenderPassEvent renderPassEvent = RenderPassEvent.AfterRenderingOpaques;
 
         public override void Create()
         {
-            _portalPass = new PortalRenderPass(layers);
+            _renderPass = new RenderPass(layer, overwriteMaterial, renderPassEvent);
         }
 
         public override void AddRenderPasses(ScriptableRenderer renderer, ref RenderingData renderingData)
         {
-            renderer.EnqueuePass(_portalPass);
+            renderer.EnqueuePass(_renderPass);
         }
     }
 }