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// Amplify Shader Editor - Visual Shader Editing Tool
// Copyright (c) Amplify Creations, Lda <info@amplify.pt>
using System;
using UnityEngine;
namespace AmplifyShaderEditor
{
[Serializable]
[NodeAttributes( "Power", "Math Operators", "Base to the Exp-th power of scalars and vectors", null, KeyCode.E )]
public sealed class PowerNode : ParentNode
{
public const string SafePowerStr = "max( {0} , 0.0001 )";
public const string SafePowerLabel = "Safe Power";
[SerializeField]
private bool m_safePower = false;
protected override void CommonInit( int uniqueId )
{
base.CommonInit( uniqueId );
AddInputPort( WirePortDataType.FLOAT, false, "Base" );
AddInputPort( WirePortDataType.FLOAT, false, "Exp" );
m_inputPorts[ 1 ].FloatInternalData = 1;
AddOutputPort( WirePortDataType.FLOAT, Constants.EmptyPortValue );
m_useInternalPortData = true;
m_autoWrapProperties = true;
m_textLabelWidth = 85;
m_previewShaderGUID = "758cc2f8b537b4e4b93d9833075d138c";
}
public override void OnInputPortConnected( int portId, int otherNodeId, int otherPortId, bool activateNode = true )
{
base.OnInputPortConnected( portId, otherNodeId, otherPortId, activateNode );
UpdateConnections( portId );
}
public override void OnConnectedOutputNodeChanges( int inputPortId, int otherNodeId, int otherPortId, string name, WirePortDataType type )
{
base.OnConnectedOutputNodeChanges( inputPortId, otherNodeId, otherPortId, name, type );
UpdateConnections( inputPortId );
}
void UpdateConnections( int inputPort )
{
m_inputPorts[ inputPort ].MatchPortToConnection();
if ( inputPort == 0 )
{
m_outputPorts[ 0 ].ChangeType( m_inputPorts[ 0 ].DataType, false );
}
}
public override void DrawProperties()
{
base.DrawProperties();
m_safePower = EditorGUILayoutToggle( SafePowerLabel, m_safePower );
}
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 x = m_inputPorts[ 0 ].GeneratePortInstructions( ref dataCollector );
if( m_safePower )
{
string safePowerName = "saferPower" + OutputId;
string safePowerValue = string.Format( SafePowerStr, x );
dataCollector.AddLocalVariable( UniqueId, CurrentPrecisionType, m_inputPorts[ 0 ].DataType, safePowerName, safePowerValue );
x = safePowerName;
}
string y = m_inputPorts[ 1 ].GenerateShaderForOutput( ref dataCollector, m_inputPorts[ 0 ].DataType, ignoreLocalvar, true );
string result = "pow( " + x + " , " + y + " )";
return CreateOutputLocalVariable( 0, result, ref dataCollector );
}
public override void ReadFromString( ref string[] nodeParams )
{
base.ReadFromString( ref nodeParams );
if( UIUtils.CurrentShaderVersion() > 17502 )
m_safePower = 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_safePower );
}
}
}
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