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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( "Clip", "Miscellaneous", "Conditionally kill a pixel before output" )]
public sealed class ClipNode : ParentNode
{
private const string ClipOpFormat = "clip( {0} );";
private const string ClipSubOpFormat = "clip( {0} - {1});";
protected override void CommonInit( int uniqueId )
{
base.CommonInit( uniqueId );
AddInputPort( WirePortDataType.FLOAT, false, Constants.EmptyPortValue );
AddInputPort( WirePortDataType.FLOAT, false, "Alpha" );
AddInputPort( WirePortDataType.FLOAT, false, "Threshold" );
AddOutputPort( WirePortDataType.FLOAT, Constants.EmptyPortValue );
m_useInternalPortData = true;
m_inputPorts[ 0 ].CreatePortRestrictions( WirePortDataType.OBJECT,
WirePortDataType.FLOAT ,
WirePortDataType.FLOAT2,
WirePortDataType.FLOAT3,
WirePortDataType.FLOAT4,
WirePortDataType.COLOR ,
WirePortDataType.INT);
m_previewShaderGUID = "1fca7774f364aee4d8c64e8634ef4be4";
}
public override void OnInputPortConnected( int portId, int otherNodeId, int otherPortId, bool activateNode = true )
{
base.OnInputPortConnected( portId, otherNodeId, otherPortId, activateNode );
m_inputPorts[ portId ].MatchPortToConnection();
UpdatePortConnection( portId );
}
public override void OnConnectedOutputNodeChanges( int outputPortId, int otherNodeId, int otherPortId, string name, WirePortDataType type )
{
base.OnConnectedOutputNodeChanges( outputPortId, otherNodeId, otherPortId, name, type );
m_inputPorts[ outputPortId ].MatchPortToConnection();
UpdatePortConnection( outputPortId );
}
void UpdatePortConnection( int portId )
{
if( portId == 0 )
{
m_outputPorts[ 0 ].ChangeType( m_inputPorts[ 0 ].DataType, false );
}
else
{
int otherPortId = portId == 1 ? 2 : 1;
if( m_inputPorts[ otherPortId ].IsConnected )
{
WirePortDataType type1 = m_inputPorts[ portId ].DataType;
WirePortDataType type2 = m_inputPorts[ otherPortId ].DataType;
WirePortDataType mainType = UIUtils.GetPriority( type1 ) > UIUtils.GetPriority( type2 ) ? type1 : type2;
m_inputPorts[ portId ].ChangeType( mainType, false );
m_inputPorts[ otherPortId ].ChangeType( mainType , false );
}
else
{
m_inputPorts[ otherPortId ].ChangeType( m_inputPorts[ portId ].DataType,false );
}
}
}
public override void OnInputPortDisconnected( int portId )
{
base.OnInputPortDisconnected( portId );
if( portId == 0 )
return;
int otherPortId = portId == 1 ? 2 : 1;
if( m_inputPorts[ otherPortId ].IsConnected )
{
m_inputPorts[ portId ].ChangeType( m_inputPorts[ otherPortId ].DataType, false );
}
else
{
m_inputPorts[ portId ].ChangeType( WirePortDataType.FLOAT, false );
m_inputPorts[ otherPortId ].ChangeType( WirePortDataType.FLOAT, false );
}
}
public override string GenerateShaderForOutput( int outputId, ref MasterNodeDataCollector dataCollector, bool ignoreLocalvar )
{
if( dataCollector.PortCategory == MasterNodePortCategory.Vertex ||
dataCollector.PortCategory == MasterNodePortCategory.Tessellation )
{
UIUtils.ShowMessage( UniqueId, "Clip can only be used in fragment functions", MessageSeverity.Warning );
return GenerateErrorValue();
}
string value = m_inputPorts[ 0 ].GeneratePortInstructions( ref dataCollector );
string alpha = m_inputPorts[ 1 ].GeneratePortInstructions( ref dataCollector );
if( m_inputPorts[ 2 ].IsConnected )
{
string threshold = m_inputPorts[ 2 ].GeneratePortInstructions( ref dataCollector );
dataCollector.AddLocalVariable( UniqueId, string.Format( ClipSubOpFormat, alpha , threshold) );
}
else
{
if( m_inputPorts[ 2 ].IsZeroInternalData )
{
dataCollector.AddLocalVariable( UniqueId, string.Format( ClipOpFormat, alpha ) );
}
else
{
string threshold = m_inputPorts[ 2 ].GeneratePortInstructions( ref dataCollector );
dataCollector.AddLocalVariable( UniqueId, string.Format( ClipSubOpFormat, alpha, threshold ) );
}
}
return value;
}
}
}
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