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95 lines
4.5 KiB
95 lines
4.5 KiB
// Amplify Shader Editor - Visual Shader Editing Tool
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// Copyright (c) Amplify Creations, Lda <info@amplify.pt>
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using UnityEditor;
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using System;
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namespace AmplifyShaderEditor
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{
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[Serializable]
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[NodeAttributes( "Rotate About Axis", "Vector Operators", "Rotates a vector around a normalized axis" )]
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public class RotateAboutAxisNode : ParentNode
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{
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private const string FunctionHeader = "float3 RotateAroundAxis( float3 center, float3 original, float3 u, float angle )";
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private const string FunctionCall = "RotateAroundAxis( {0}, {1}, {2}, {3} )";
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private readonly string[] FunctionBody =
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{
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"float3 RotateAroundAxis( float3 center, float3 original, float3 u, float angle )\n",
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"{\n",
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"\toriginal -= center;\n",
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"\tfloat C = cos( angle );\n",
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"\tfloat S = sin( angle );\n",
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"\tfloat t = 1 - C;\n",
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"\tfloat m00 = t * u.x * u.x + C;\n",
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"\tfloat m01 = t * u.x * u.y - S * u.z;\n",
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"\tfloat m02 = t * u.x * u.z + S * u.y;\n",
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"\tfloat m10 = t * u.x * u.y + S * u.z;\n",
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"\tfloat m11 = t * u.y * u.y + C;\n",
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"\tfloat m12 = t * u.y * u.z - S * u.x;\n",
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"\tfloat m20 = t * u.x * u.z - S * u.y;\n",
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"\tfloat m21 = t * u.y * u.z + S * u.x;\n",
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"\tfloat m22 = t * u.z * u.z + C;\n",
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"\tfloat3x3 finalMatrix = float3x3( m00, m01, m02, m10, m11, m12, m20, m21, m22 );\n",
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"\treturn mul( finalMatrix, original ) + center;\n",
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"}\n"
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};
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private const string NormalizeAxisLabel = "Rotation Axis";
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private const string NonNormalizeAxisLabel = "Normalized Rotation Axis";
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private const string NormalizeAxisStr = "Normalize Axis";
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[UnityEngine.SerializeField]
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private bool m_normalizeAxis = false;
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protected override void CommonInit( int uniqueId )
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{
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base.CommonInit( uniqueId );
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AddInputPort( WirePortDataType.FLOAT3, false, m_normalizeAxis? NormalizeAxisLabel: NonNormalizeAxisLabel );
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AddInputPort( WirePortDataType.FLOAT, false, "Rotation Angle" );
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AddInputPort( WirePortDataType.FLOAT3, false, "Pivot Point" );
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AddInputPort( WirePortDataType.FLOAT3, false, "Position" );
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AddOutputPort( WirePortDataType.FLOAT3, Constants.EmptyPortValue );
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m_useInternalPortData = true;
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m_autoWrapProperties = true;
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}
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public override void DrawProperties()
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{
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base.DrawProperties();
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EditorGUI.BeginChangeCheck();
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m_normalizeAxis = EditorGUILayoutToggle( NormalizeAxisStr, m_normalizeAxis );
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if( EditorGUI.EndChangeCheck() )
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{
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m_inputPorts[ 0 ].Name = (m_normalizeAxis ? NormalizeAxisLabel : NonNormalizeAxisLabel);
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}
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}
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public override string GenerateShaderForOutput( int outputId, ref MasterNodeDataCollector dataCollector, bool ignoreLocalvar )
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{
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if( m_outputPorts[ 0 ].IsLocalValue( dataCollector.PortCategory ) )
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return m_outputPorts[ 0 ].LocalValue( dataCollector.PortCategory );
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string normalizeRotAxis = m_inputPorts[ 0 ].GeneratePortInstructions( ref dataCollector );
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if( m_normalizeAxis )
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{
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normalizeRotAxis = string.Format( "normalize( {0} )", normalizeRotAxis );
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}
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string rotationAngle = m_inputPorts[ 1 ].GeneratePortInstructions( ref dataCollector );
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string pivotPoint = m_inputPorts[ 2 ].GeneratePortInstructions( ref dataCollector );
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string position = m_inputPorts[ 3 ].GeneratePortInstructions( ref dataCollector );
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dataCollector.AddFunction( FunctionHeader, FunctionBody, false );
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RegisterLocalVariable( 0, string.Format( FunctionCall, pivotPoint, position, normalizeRotAxis, rotationAngle ), ref dataCollector, "rotatedValue" + OutputId );
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return m_outputPorts[ 0 ].LocalValue( dataCollector.PortCategory );
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}
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public override void ReadFromString( ref string[] nodeParams )
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{
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base.ReadFromString( ref nodeParams );
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m_normalizeAxis = Convert.ToBoolean( GetCurrentParam( ref nodeParams ) );
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}
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public override void WriteToString( ref string nodeInfo, ref string connectionsInfo )
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{
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base.WriteToString( ref nodeInfo, ref connectionsInfo );
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IOUtils.AddFieldValueToString( ref nodeInfo, m_normalizeAxis );
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}
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}
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}
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