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// Amplify Shader Editor - Visual Shader Editing Tool
// Copyright (c) Amplify Creations, Lda <info@amplify.pt>
using UnityEngine;
using System;
namespace AmplifyShaderEditor
{
[Serializable]
[NodeAttributes( "Depth Fade", "Surface Data", "Outputs a linear gradient representing the distance between the surface of this object and geometry behind" )]
public sealed class DepthFade : ParentNode
{
private const string ConvertToLinearStr = "Convert To Linear";
private const string SaturateStr = "Saturate";
private const string MirrorStr = "Mirror";
[SerializeField]
private bool m_convertToLinear = true;
[SerializeField]
private bool m_saturate = false;
[SerializeField]
private bool m_mirror = true;
protected override void CommonInit( int uniqueId )
{
base.CommonInit( uniqueId );
AddInputPort( WirePortDataType.FLOAT3, false, "Vertex Position", -1, MasterNodePortCategory.Fragment, 1 );
AddInputPort( WirePortDataType.FLOAT, false, "Distance",-1,MasterNodePortCategory.Fragment,0 );
GetInputPortByUniqueId(0).FloatInternalData = 1;
AddOutputPort( WirePortDataType.FLOAT, "Out" );
m_useInternalPortData = true;
m_autoWrapProperties = true;
}
public override string GenerateShaderForOutput( int outputId, ref MasterNodeDataCollector dataCollector, bool ignoreLocalvar )
{
if( dataCollector.PortCategory == MasterNodePortCategory.Tessellation )
{
UIUtils.ShowNoVertexModeNodeMessage( this );
return "0";
}
if( m_outputPorts[ 0 ].IsLocalValue( dataCollector.PortCategory ) )
return GetOutputColorItem( 0, outputId, m_outputPorts[ 0 ].LocalValue( dataCollector.PortCategory ) );
if( !( dataCollector.IsTemplate && dataCollector.IsSRP ) )
dataCollector.AddToIncludes( UniqueId, Constants.UnityCgLibFuncs );
if( !dataCollector.IsTemplate || dataCollector.TemplateDataCollectorInstance.CurrentSRPType != TemplateSRPType.HD )
{
if( dataCollector.IsTemplate && dataCollector.CurrentSRPType == TemplateSRPType.Lightweight )
{
//dataCollector.AddToUniforms( UniqueId, Constants.CameraDepthTextureSRPVar );
//dataCollector.AddToUniforms( UniqueId, Constants.CameraDepthTextureSRPSampler );
dataCollector.AddToDirectives( Constants.CameraDepthTextureLWEnabler, -1, AdditionalLineType.Define );
}
else
{
dataCollector.AddToUniforms( UniqueId, Constants.CameraDepthTextureValue );
}
dataCollector.AddToUniforms( UniqueId, Constants.CameraDepthTextureTexelSize );
}
string screenPosNorm = string.Empty;
InputPort vertexPosPort = GetInputPortByUniqueId( 1 );
if( vertexPosPort.IsConnected )
{
string vertexPosVar = "vertexPos" + OutputId;
GenerateInputInVertex( ref dataCollector, 1, vertexPosVar, false );
screenPosNorm = GeneratorUtils.GenerateScreenPositionNormalizedForValue( vertexPosVar, OutputId, ref dataCollector, UniqueId, CurrentPrecisionType, !dataCollector.UsingCustomScreenPos );
}
else
{
if( dataCollector.IsTemplate )
{
string ppsScreenPos = string.Empty;
if( !dataCollector.TemplateDataCollectorInstance.GetCustomInterpolatedData( TemplateInfoOnSematics.SCREEN_POSITION_NORMALIZED, WirePortDataType.FLOAT4, PrecisionType.Float, ref ppsScreenPos, true, MasterNodePortCategory.Fragment ) )
{
screenPosNorm = GeneratorUtils.GenerateScreenPositionNormalized( ref dataCollector, UniqueId, CurrentPrecisionType, !dataCollector.UsingCustomScreenPos );
}
else
{
screenPosNorm = ppsScreenPos;
}
}
else
{
screenPosNorm = GeneratorUtils.GenerateScreenPositionNormalized( ref dataCollector, UniqueId, CurrentPrecisionType, !dataCollector.UsingCustomScreenPos );
}
}
string screenDepth = TemplateHelperFunctions.CreateDepthFetch( dataCollector, screenPosNorm );
if( m_convertToLinear )
{
if( dataCollector.IsTemplate && dataCollector.IsSRP )
screenDepth = string.Format( "LinearEyeDepth({0},_ZBufferParams)", screenDepth );
else
screenDepth = string.Format( "LinearEyeDepth({0})", screenDepth );
}
else
{
screenDepth = string.Format( "({0}*( _ProjectionParams.z - _ProjectionParams.y ))", screenDepth );
}
string distance = GetInputPortByUniqueId( 0 ).GeneratePortInstructions( ref dataCollector );
dataCollector.AddLocalVariable( UniqueId, "float screenDepth" + OutputId + " = " + screenDepth + ";" );
string finalVarName = "distanceDepth" + OutputId;
string finalVarValue = string.Empty;
if( dataCollector.IsTemplate && dataCollector.IsSRP )
finalVarValue = "( screenDepth" + OutputId + " - LinearEyeDepth( " + screenPosNorm + ".z,_ZBufferParams ) ) / ( " + distance + " )";
else
finalVarValue = "( screenDepth" + OutputId + " - LinearEyeDepth( " + screenPosNorm + ".z ) ) / ( " + distance + " )";
if( m_mirror )
{
finalVarValue = string.Format( "abs( {0} )", finalVarValue );
}
if( m_saturate )
{
finalVarValue = string.Format( "saturate( {0} )", finalVarValue );
}
dataCollector.AddLocalVariable( UniqueId, CurrentPrecisionType, WirePortDataType.FLOAT, finalVarName, finalVarValue );
m_outputPorts[ 0 ].SetLocalValue( finalVarName, dataCollector.PortCategory );
return GetOutputColorItem( 0, outputId, finalVarName );
}
public override void DrawProperties()
{
base.DrawProperties();
m_convertToLinear = EditorGUILayoutToggle( ConvertToLinearStr, m_convertToLinear );
m_mirror = EditorGUILayoutToggle( MirrorStr, m_mirror );
m_saturate = EditorGUILayoutToggle( SaturateStr, m_saturate );
}
public override void ReadFromString( ref string[] nodeParams )
{
base.ReadFromString( ref nodeParams );
if( UIUtils.CurrentShaderVersion() >= 13901 )
{
m_convertToLinear = Convert.ToBoolean( GetCurrentParam( ref nodeParams ) );
}
if( UIUtils.CurrentShaderVersion() > 15607 )
{
m_saturate = Convert.ToBoolean( GetCurrentParam( ref nodeParams ) );
}
if( UIUtils.CurrentShaderVersion() > 15700 )
{
m_mirror = Convert.ToBoolean( GetCurrentParam( ref nodeParams ) );
}
}
public override void WriteToString( ref string nodeInfo, ref string connectionsInfo )
{
base.WriteToString( ref nodeInfo, ref connectionsInfo );
IOUtils.AddFieldValueToString( ref nodeInfo, m_convertToLinear );
IOUtils.AddFieldValueToString( ref nodeInfo, m_saturate );
IOUtils.AddFieldValueToString( ref nodeInfo, m_mirror );
}
}
}
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