Added transparency to custom pass.

phi-lira · Aug 10, 2018 · d918685 · d918685
1 parent 85028a4
commit d918685
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Showing 2 changed files with 26 additions and 17 deletions.
diff --git a/Assets/Shaders/CustomBlit.shader b/Assets/Shaders/CustomBlit.shader
@@ -3,6 +3,7 @@
 	Properties
 	{
 		_BlitTex("BlitTexture", 2D) = "white" {}
+        _Alpha("Alpha", Float) = 0.5
 	}
 	SubShader
 	{
@@ -19,14 +20,15 @@
 
 			TEXTURE2D(_BlitTex);
 			SAMPLER(sampler_BlitTex);
+            half _Alpha;
 
 			struct VertexOutput
 			{
 			    float4 positionCS : SV_POSITION;
-			    float3 uv0 : TEXCOORD0;
+			    float2 uv0 : TEXCOORD0;
 			};
 
-			VertexOutput vert (float4 positionOS : POSITION, float uv0 : TEXCOORD0)
+			VertexOutput vert (float4 positionOS : POSITION, float2 uv0 : TEXCOORD0)
 			{
 			    VertexOutput OUT;
 				OUT.positionCS = TransformObjectToHClip(positionOS.xyz);
@@ -37,7 +39,7 @@
 			half4 frag (VertexOutput IN) : SV_Target
 			{
 			    half3 color = SAMPLE_TEXTURE2D(_BlitTex, sampler_BlitTex, IN.uv0).rgb;
-			    return half4(color, 0.5);
+			    return half4(color, _Alpha);
 			}
 			ENDHLSL
 		}

diff --git a/Assets/_Completed/CustomPassGetter.cs b/Assets/_Completed/CustomPassGetter.cs
@@ -2,52 +2,59 @@
 
 namespace UnityEngine.Experimental.Rendering.LightweightPipeline
 {
+    [ExecuteInEditMode]
 	public class CustomPassGetter : MonoBehaviour, IAfterOpaquePass
 	{
 		public Texture2D m_OverlayTexture;
-		private CustomPass pass = new CustomPass();
+	    public float m_Alpha = 0.5f;
+	    private CustomPass m_Pass;
+
+	    public void OnEnable()
+	    {
+	        Material material = CoreUtils.CreateEngineMaterial(Shader.Find("Hidden/SIGGRAPH Studio/CustomBlit"));
+	        m_Pass = new CustomPass(material);
+	    }
 
 		public ScriptableRenderPass GetPassToEnqueue(RenderTextureDescriptor baseDescriptor,
 			RenderTargetHandle colorAttachmentHandle,
 			RenderTargetHandle depthAttachmentHandle)
 		{
-			pass.Setup(colorAttachmentHandle, m_OverlayTexture);
-			return pass;
+		    m_Pass.Setup(colorAttachmentHandle, m_OverlayTexture, m_Alpha);
+			return m_Pass;
 		}
 	}
 
 
 	public class CustomPass : ScriptableRenderPass
 	{
+	    public CustomPass(Material material)
+	    {
+	        m_Material = material;
+	    }
+
 		public override void Execute(ScriptableRenderer renderer, ref ScriptableRenderContext context,
 			ref CullResults cullResults,
 			ref RenderingData renderingData)
 		{
-			if (m_Material == null)
-				m_Material = CoreUtils.CreateEngineMaterial(Shader.Find("Hidden/SIGGRAPH Studio/CustomBlit"));
 			m_Material.SetTexture("_BlitTex", m_OverlayTexture);
+		    m_Material.SetFloat("_Alpha", m_Alpha);
 
-			if (m_OverlayTexture != null)
-			{
-				MaterialPropertyBlock props = new MaterialPropertyBlock();
-				props.SetTexture("_BlitTex", m_OverlayTexture);
-			}
-
 			CommandBuffer cmd = CommandBufferPool.Get("Render Overlay");
 			cmd.Blit(m_OverlayTexture, colorAttachment.Identifier(), m_Material);
 			context.ExecuteCommandBuffer(cmd);
 			CommandBufferPool.Release(cmd);
 		}
 
-		public void Setup(RenderTargetHandle colorAttachmentHandle, Texture2D overlayTexture)
+		public void Setup(RenderTargetHandle colorAttachmentHandle, Texture2D overlayTexture, float alpha)
 		{
 			colorAttachment = colorAttachmentHandle;
 			m_OverlayTexture = overlayTexture;
+		    m_Alpha = alpha;
 		}
 
-		private Material m_Material = null;
+        private Material m_Material = null;
 		private RenderTargetHandle colorAttachment;
 		private Texture2D m_OverlayTexture;
-
+	    private float m_Alpha;
 	}
 }