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// Amplify Shader Editor - Visual Shader Editing Tool
// Copyright (c) Amplify Creations, Lda <info@amplify.pt>
using UnityEngine;
using UnityEditor;
using System;
namespace AmplifyShaderEditor
{
[Serializable]
[NodeAttributes( "Screen Depth", "Camera And Screen", "Given a screen position returns the depth of the scene to the object as seen by the camera" )]
public sealed class ScreenDepthNode : ParentNode
{
[SerializeField]
private bool m_convertToLinear = true;
[SerializeField]
private int m_viewSpaceInt = 0;
private const string ConvertToLinearStr = "Convert To Linear";
private readonly string[] m_viewSpaceStr = { "Eye Space", "0-1 Space" };
private readonly string[] m_vertexNameStr = { "eyeDepth", "clampDepth" };
private UpperLeftWidgetHelper m_upperLeftWidget = new UpperLeftWidgetHelper();
protected override void CommonInit( int uniqueId )
{
base.CommonInit( uniqueId );
AddInputPort( WirePortDataType.FLOAT4, false, "Pos" );
AddOutputPort( WirePortDataType.FLOAT, "Depth" );
m_autoWrapProperties = true;
m_hasLeftDropdown = true;
SetAdditonalTitleText( string.Format( Constants.SubTitleSpaceFormatStr, m_viewSpaceStr[ m_viewSpaceInt ] ) );
}
public override void AfterCommonInit()
{
base.AfterCommonInit();
if( PaddingTitleLeft == 0 )
{
PaddingTitleLeft = Constants.PropertyPickerWidth + Constants.IconsLeftRightMargin;
if( PaddingTitleRight == 0 )
PaddingTitleRight = Constants.PropertyPickerWidth + Constants.IconsLeftRightMargin;
}
}
public override void Destroy()
{
base.Destroy();
m_upperLeftWidget = null;
}
public override void Draw( DrawInfo drawInfo )
{
base.Draw( drawInfo );
EditorGUI.BeginChangeCheck();
m_viewSpaceInt = m_upperLeftWidget.DrawWidget( this, m_viewSpaceInt, m_viewSpaceStr );
if( EditorGUI.EndChangeCheck() )
{
SetAdditonalTitleText( string.Format( Constants.SubTitleSpaceFormatStr, m_viewSpaceStr[ m_viewSpaceInt ] ) );
}
}
public override void DrawProperties()
{
base.DrawProperties();
EditorGUI.BeginChangeCheck();
m_viewSpaceInt = EditorGUILayoutPopup( "View Space", m_viewSpaceInt, m_viewSpaceStr );
if( EditorGUI.EndChangeCheck() )
{
SetAdditonalTitleText( string.Format( Constants.SubTitleSpaceFormatStr, m_viewSpaceStr[ m_viewSpaceInt ] ) );
}
m_convertToLinear = EditorGUILayoutToggle( ConvertToLinearStr, m_convertToLinear );
}
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;
if( m_inputPorts[ 0 ].IsConnected )
screenPosNorm = m_inputPorts[ 0 ].GeneratePortInstructions( ref dataCollector );
else
{
if( dataCollector.IsTemplate )
{
if( !dataCollector.TemplateDataCollectorInstance.GetCustomInterpolatedData( TemplateInfoOnSematics.SCREEN_POSITION_NORMALIZED, WirePortDataType.FLOAT4, PrecisionType.Float, ref screenPosNorm, true,MasterNodePortCategory.Fragment ) )
{
screenPosNorm = GeneratorUtils.GenerateScreenPositionNormalized( ref dataCollector, UniqueId, CurrentPrecisionType, !dataCollector.UsingCustomScreenPos );
}
}
else
{
screenPosNorm = GeneratorUtils.GenerateScreenPositionNormalized( ref dataCollector, UniqueId, CurrentPrecisionType, !dataCollector.UsingCustomScreenPos );
}
}
string screenDepthInstruction = TemplateHelperFunctions.CreateDepthFetch( dataCollector, screenPosNorm );
if( m_convertToLinear )
{
string viewSpace = m_viewSpaceInt == 0 ? "LinearEyeDepth" : "Linear01Depth";
string formatStr = string.Empty;
if( ( dataCollector.IsTemplate && dataCollector.IsSRP ) )
formatStr = "(" + screenDepthInstruction + ",_ZBufferParams)";
else
formatStr = "(" + screenDepthInstruction + ")";
screenDepthInstruction = viewSpace + formatStr;
}
else
{
if( m_viewSpaceInt == 0 )
{
screenDepthInstruction = string.Format( "({0}*( _ProjectionParams.z - _ProjectionParams.y ))", screenDepthInstruction );
}
}
dataCollector.AddLocalVariable( UniqueId, CurrentPrecisionType, WirePortDataType.FLOAT, m_vertexNameStr[ m_viewSpaceInt ] + OutputId, screenDepthInstruction );
m_outputPorts[ 0 ].SetLocalValue( m_vertexNameStr[ m_viewSpaceInt ] + OutputId, dataCollector.PortCategory );
return GetOutputColorItem( 0, outputId, m_vertexNameStr[ m_viewSpaceInt ] + OutputId );
}
public override void ReadFromString( ref string[] nodeParams )
{
base.ReadFromString( ref nodeParams );
m_viewSpaceInt = Convert.ToInt32( GetCurrentParam( ref nodeParams ) );
if( UIUtils.CurrentShaderVersion() >= 13901 )
{
m_convertToLinear = Convert.ToBoolean( GetCurrentParam( ref nodeParams ) );
}
SetAdditonalTitleText( string.Format( Constants.SubTitleSpaceFormatStr, m_viewSpaceStr[ m_viewSpaceInt ] ) );
}
public override void WriteToString( ref string nodeInfo, ref string connectionsInfo )
{
base.WriteToString( ref nodeInfo, ref connectionsInfo );
IOUtils.AddFieldValueToString( ref nodeInfo, m_viewSpaceInt );
IOUtils.AddFieldValueToString( ref nodeInfo, m_convertToLinear );
}
}
}
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