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// Amplify Shader Editor - Visual Shader Editing Tool
// Copyright (c) Amplify Creations, Lda <info@amplify.pt>
using System;
namespace AmplifyShaderEditor
{
[Serializable]
[NodeAttributes( "Scale And Offset", "Math Operators", "Scales and offsets an input value\n( ( <b>Value</b> * <b>Scale</b> ) + <b>Offset</b> )" )]
public sealed class ScaleAndOffsetNode : ParentNode
{
private const string ScaleOffsetOpStr = "({0}*{1} + {2})";
protected override void CommonInit( int uniqueId )
{
base.CommonInit( uniqueId );
AddInputPort( WirePortDataType.FLOAT, false, Constants.EmptyPortValue );
AddInputPort( WirePortDataType.FLOAT, false, "Scale" );
m_inputPorts[ 1 ].FloatInternalData = 1;
AddInputPort( WirePortDataType.FLOAT, false, "Offset" );
AddOutputPort( WirePortDataType.FLOAT, " " );
m_useInternalPortData = true;
m_previewShaderGUID = "a1f1053d4d9c3be439e0382038b74771";
}
public override void OnInputPortConnected( int portId, int otherNodeId, int otherPortId, bool activateNode = true )
{
base.OnInputPortConnected( portId, otherNodeId, otherPortId, activateNode );
UpdateConnection( portId );
}
public override void OnConnectedOutputNodeChanges( int inputPortId, int otherNodeId, int otherPortId, string name, WirePortDataType type )
{
base.OnConnectedOutputNodeChanges( inputPortId, otherNodeId, otherPortId, name, type );
UpdateConnection( inputPortId );
}
public override void OnInputPortDisconnected( int portId )
{
base.OnInputPortDisconnected( portId );
m_inputPorts[ portId ].ChangeType( WirePortDataType.FLOAT, false );
if( portId == 0 )
{
m_outputPorts[ 0 ].ChangeType( WirePortDataType.FLOAT, false );
}
}
void UpdateConnection( int portId )
{
if( portId == 0 )
{
m_inputPorts[ 0 ].MatchPortToConnection();
m_outputPorts[ 0 ].ChangeType( m_inputPorts[ 0 ].DataType, false );
}
else
{
WirePortDataType newDataType = m_inputPorts[ portId ].ConnectionType() == WirePortDataType.FLOAT ? WirePortDataType.FLOAT : m_outputPorts[ 0 ].DataType;
m_inputPorts[ portId ].ChangeType( newDataType, false );
}
}
public override string GenerateShaderForOutput( int outputId, ref MasterNodeDataCollector dataCollector, bool ignoreLocalvar )
{
if ( m_outputPorts[ 0 ].IsLocalValue( dataCollector.PortCategory ) )
return m_outputPorts[ 0 ].LocalValue( dataCollector.PortCategory );
string value = m_inputPorts[ 0 ].GeneratePortInstructions( ref dataCollector );
// If scale or offset ports are floats then there's no need to cast them to any other type since they can be multiplied with everything
WirePortDataType scaleType = ( m_inputPorts[ 1 ].ConnectionType() == WirePortDataType.FLOAT ) ? WirePortDataType.FLOAT : m_outputPorts[ 0 ].DataType;
string scale = m_inputPorts[ 1 ].GenerateShaderForOutput( ref dataCollector, scaleType, ignoreLocalvar , true );
WirePortDataType offsetType = ( m_inputPorts[ 2 ].ConnectionType() == WirePortDataType.FLOAT ) ? WirePortDataType.FLOAT : m_outputPorts[ 0 ].DataType;
string offset = m_inputPorts[ 2 ].GenerateShaderForOutput( ref dataCollector, offsetType, ignoreLocalvar, true );
string result = string.Format( ScaleOffsetOpStr, value, scale, offset );
return CreateOutputLocalVariable( 0, result, ref dataCollector );
}
}
}
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