From b82da95b5181ac8bbae38efb13e950d5e88a4caa Mon Sep 17 00:00:00 2001
From: chai <chaifix@163.com>
Date: Fri, 23 Oct 2020 13:08:43 +0800
Subject: =?UTF-8?q?*=E7=A7=BB=E5=8A=A8amplify=20shader=20editor=E5=88=B0th?=
 =?UTF-8?q?ird=20party=E7=9B=AE=E5=BD=95?=
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---
 .../Nodes/HelperFuncs/ComputeScreenPosHlpNode.cs   | 76 ++++++++++++++++++++++
 1 file changed, 76 insertions(+)
 create mode 100644 Assets/ThirdParty/AmplifyShaderEditor/Plugins/Editor/Nodes/HelperFuncs/ComputeScreenPosHlpNode.cs

(limited to 'Assets/ThirdParty/AmplifyShaderEditor/Plugins/Editor/Nodes/HelperFuncs/ComputeScreenPosHlpNode.cs')

diff --git a/Assets/ThirdParty/AmplifyShaderEditor/Plugins/Editor/Nodes/HelperFuncs/ComputeScreenPosHlpNode.cs b/Assets/ThirdParty/AmplifyShaderEditor/Plugins/Editor/Nodes/HelperFuncs/ComputeScreenPosHlpNode.cs
new file mode 100644
index 00000000..883009b9
--- /dev/null
+++ b/Assets/ThirdParty/AmplifyShaderEditor/Plugins/Editor/Nodes/HelperFuncs/ComputeScreenPosHlpNode.cs
@@ -0,0 +1,76 @@
+// Amplify Shader Editor - Visual Shader Editing Tool
+// Copyright (c) Amplify Creations, Lda <info@amplify.pt>
+using UnityEngine;
+using System;
+namespace AmplifyShaderEditor
+{
+	[Serializable]
+	[NodeAttributes( "Compute Screen Pos", "Camera And Screen", "Computes texture coordinate for doing a screenspace-mapped texture sample. Input is clip space position" )]
+	public sealed class ComputeScreenPosHlpNode : HelperParentNode
+	{
+		[SerializeField]
+		private bool m_normalize = false;
+		private string NormalizeStr = "Normalize";
+		private readonly string[] NormalizeOps =
+		{	"{0} = {0} / {0}.w;",
+			"{0}.z = ( UNITY_NEAR_CLIP_VALUE >= 0 ) ? {0}.z : {0}.z* 0.5 + 0.5;"
+		};
+
+		protected override void CommonInit( int uniqueId )
+		{
+			base.CommonInit( uniqueId );
+			m_funcType = "ComputeScreenPos";
+			m_funcHDFormatOverride = "ComputeScreenPos( {0} , _ProjectionParams.x )";
+			m_inputPorts[ 0 ].ChangeType( WirePortDataType.FLOAT4, false );
+			m_outputPorts[ 0 ].ChangeType( WirePortDataType.FLOAT4, false );
+			m_outputPorts[ 0 ].Name = "XYZW";
+			m_autoWrapProperties = true;
+			m_previewShaderGUID = "97bd4895d847d764eb21d2bf7aa13671";
+		}
+
+		public override void SetPreviewInputs()
+		{
+			base.SetPreviewInputs();
+			m_previewMaterialPassId = m_normalize ? 1 : 0;
+		}
+
+		protected override void OnUniqueIDAssigned()
+		{
+			base.OnUniqueIDAssigned();
+			m_localVarName = "computeScreenPos" + OutputId;
+		}
+
+		public override void DrawProperties()
+		{
+			base.DrawProperties();
+			m_normalize = EditorGUILayoutToggle( NormalizeStr, m_normalize );
+		}
+
+		public override string GenerateShaderForOutput( int outputId, ref MasterNodeDataCollector dataCollector, bool ignoreLocalvar )
+		{
+			string result = base.GenerateShaderForOutput( outputId, ref dataCollector, ignoreLocalvar );
+			if( m_normalize )
+			{
+				dataCollector.AddLocalVariable( UniqueId, string.Format( NormalizeOps[ 0 ], m_localVarName ) );
+				dataCollector.AddLocalVariable( UniqueId, string.Format( NormalizeOps[ 1 ], m_localVarName ) );
+			}
+			return result;
+		}
+		
+		public override void WriteToString( ref string nodeInfo, ref string connectionsInfo )
+		{
+			base.WriteToString( ref nodeInfo, ref connectionsInfo );
+			IOUtils.AddFieldValueToString( ref nodeInfo, m_normalize );
+		}
+
+		public override void ReadFromString( ref string[] nodeParams )
+		{
+			base.ReadFromString( ref nodeParams );
+			if( UIUtils.CurrentShaderVersion() > 15404 )
+			{
+				m_normalize = Convert.ToBoolean( GetCurrentParam( ref nodeParams ) );
+			}
+		}
+
+	}
+}
-- 
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