55 lines
1.8 KiB
C#
55 lines
1.8 KiB
C#
// Amplify Shader Editor - Visual Shader Editing Tool
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// Copyright (c) Amplify Creations, Lda <info@amplify.pt>
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using System;
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namespace AmplifyShaderEditor
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{
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[Serializable]
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[NodeAttributes( "Compute Grab Screen Pos", "Camera And Screen", "Computes texture coordinate for doing a screenspace-mapped texture sample. Input is clip space position" )]
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public sealed class ComputeGrabScreenPosHlpNode : HelperParentNode
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{
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private readonly string[] ComputeGrabScreenPosFunction =
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{
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"inline float4 ComputeGrabScreenPos( float4 pos )\n",
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"{\n",
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"#if UNITY_UV_STARTS_AT_TOP\n",
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"\tfloat scale = -1.0;\n",
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"#else\n",
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"\tfloat scale = 1.0;\n",
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"#endif\n",
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"\tfloat4 o = pos * 0.5f;\n",
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"\to.xy = float2( o.x, o.y*scale ) + o.w;\n",
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"#ifdef UNITY_SINGLE_PASS_STEREO\n",
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"\to.xy = TransformStereoScreenSpaceTex ( o.xy, pos.w );\n",
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"#endif\n",
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"\to.zw = pos.zw;\n",
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"\treturn o;\n",
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"}\n"
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};
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protected override void CommonInit( int uniqueId )
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{
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base.CommonInit( uniqueId );
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m_funcType = "ComputeGrabScreenPos";
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m_inputPorts[ 0 ].ChangeType( WirePortDataType.FLOAT4, false );
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m_outputPorts[ 0 ].ChangeType( WirePortDataType.FLOAT4, false );
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m_outputPorts[ 0 ].Name = "XYZW";
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}
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protected override void OnUniqueIDAssigned()
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{
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base.OnUniqueIDAssigned();
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m_localVarName = "computeGrabScreenPos" + OutputId;
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}
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public override string GenerateShaderForOutput( int outputId, ref MasterNodeDataCollector dataCollector, bool ignoreLocalvar )
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{
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if( dataCollector.IsTemplate && dataCollector.TemplateDataCollectorInstance.CurrentSRPType == TemplateSRPType.HD )
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{
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dataCollector.AddFunction( m_funcType, ComputeGrabScreenPosFunction, false );
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}
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return base.GenerateShaderForOutput( outputId, ref dataCollector, ignoreLocalvar );
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}
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}
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}
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