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using System;
namespace AmplifyShaderEditor
{
[Serializable]
[NodeAttributes( "HSV to RGB", "Image Effects", "Converts from HSV to RGB color space" )]
public sealed class HSVToRGBNode : ParentNode
{
public static readonly string HSVToRGBHeader = "HSVToRGB( {0}3({1},{2},{3}) )";
public static readonly string[] HSVToRGBFunction = { "{0}3 HSVToRGB( {0}3 c )\n",
"{\n",
"\t{0}4 K = {0}4( 1.0, 2.0 / 3.0, 1.0 / 3.0, 3.0 );\n",
"\t{0}3 p = abs( frac( c.xxx + K.xyz ) * 6.0 - K.www );\n",
"\treturn c.z * lerp( K.xxx, saturate( p - K.xxx ), c.y );\n",
"}\n"};
public static readonly bool[] HSVToRGBFlags = { true,
false,
true,
true,
false,
false};
protected override void CommonInit( int uniqueId )
{
base.CommonInit( uniqueId );
AddInputPort( WirePortDataType.FLOAT, false, "Hue" );
AddInputPort( WirePortDataType.FLOAT, false, "Saturation" );
AddInputPort( WirePortDataType.FLOAT, false, "Value" );
AddOutputColorPorts( "RGB", false );
m_previewShaderGUID = "fab445eb945d63047822a7a6b81b959d";
m_useInternalPortData = true;
m_autoWrapProperties = true;
m_customPrecision = true;
}
public override void DrawProperties()
{
base.DrawProperties();
DrawPrecisionProperty();
}
public static void AddHSVToRGBFunction( ref MasterNodeDataCollector dataCollector , string precisionString )
{
if( !dataCollector.HasFunction( HSVToRGBHeader ) )
{
//Hack to be used util indent is properly used
int currIndent = UIUtils.ShaderIndentLevel;
if( dataCollector.MasterNodeCategory == AvailableShaderTypes.Template )
{
UIUtils.ShaderIndentLevel = 0;
}
else
{
UIUtils.ShaderIndentLevel = 1;
UIUtils.ShaderIndentLevel++;
}
string finalFunction = string.Empty;
for( int i = 0; i < HSVToRGBFunction.Length; i++ )
{
finalFunction += UIUtils.ShaderIndentTabs + ( HSVToRGBFlags[ i ] ? string.Format( HSVToRGBFunction[ i ], precisionString ) : HSVToRGBFunction[ i ] );
}
UIUtils.ShaderIndentLevel = currIndent;
dataCollector.AddFunction( HSVToRGBHeader, finalFunction );
}
}
public override string GenerateShaderForOutput( int outputId, ref MasterNodeDataCollector dataCollector, bool ignoreLocalvar )
{
if ( m_outputPorts[ 0 ].IsLocalValue( dataCollector.PortCategory ) )
return GetOutputVectorItem( 0, outputId, m_outputPorts[ 0 ].LocalValue( dataCollector.PortCategory ) );
string precisionString = UIUtils.PrecisionWirePortToCgType( CurrentPrecisionType, WirePortDataType.FLOAT );
AddHSVToRGBFunction( ref dataCollector , precisionString );
string hue = m_inputPorts[ 0 ].GeneratePortInstructions( ref dataCollector );
string saturation = m_inputPorts[ 1 ].GeneratePortInstructions( ref dataCollector );
string value = m_inputPorts[ 2 ].GeneratePortInstructions( ref dataCollector );
RegisterLocalVariable( 0, string.Format( HSVToRGBHeader, precisionString, hue, saturation, value ), ref dataCollector, "hsvTorgb" + OutputId );
return GetOutputVectorItem( 0, outputId, m_outputPorts[ 0 ].LocalValue( dataCollector.PortCategory ) );
}
}
}
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