render stencil portals (transparent)

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);
+        }
+    }
+}