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241 lines
9.3 KiB
241 lines
9.3 KiB
// Amplify Shader Editor - Visual Shader Editing Tool
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// Copyright (c) Amplify Creations, Lda <info@amplify.pt>
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// Billboard based on:
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// https://gist.github.com/renaudbedard/7a90ec4a5a7359712202
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using System;
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using UnityEngine;
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using System.Collections.Generic;
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namespace AmplifyShaderEditor
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{
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public enum BillboardType
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{
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Cylindrical,
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Spherical
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}
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[Serializable]
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public class BillboardOpHelper
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{
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public static readonly string BillboardTitleStr = " Billboard";
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public static readonly string BillboardTypeStr = "Type";
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public static readonly string BillboardRotIndStr = "Ignore Rotation";
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public static readonly string[] BillboardCylindricalInstructions = { "//Calculate new billboard vertex position and normal",
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"float3 upCamVec = float3( 0, 1, 0 )"};
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public static readonly string[] BillboardSphericalInstructions = { "//Calculate new billboard vertex position and normal",
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"float3 upCamVec = normalize ( UNITY_MATRIX_V._m10_m11_m12 )"};
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public static readonly string[] BillboardCommonInstructions = { "float3 forwardCamVec = -normalize ( UNITY_MATRIX_V._m20_m21_m22 )",
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"float3 rightCamVec = normalize( UNITY_MATRIX_V._m00_m01_m02 )",
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"float4x4 rotationCamMatrix = float4x4( rightCamVec, 0, upCamVec, 0, forwardCamVec, 0, 0, 0, 0, 1 )",
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"{0} = normalize( mul( float4( {0} , 0 ), rotationCamMatrix ))"};
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public static readonly string[] BillboardRotDependent = { "//This unfortunately must be made to take non-uniform scaling into account",
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"//Transform to world coords, apply rotation and transform back to local",
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"{0} = mul( {0} , unity_ObjectToWorld ){1}",
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"{0} = mul( {0} , rotationCamMatrix ){1}",
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"{0} = mul( {0} , unity_WorldToObject ){1}"};
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public static readonly string[] BillboardRotIndependent = { "{0}.x *= length( unity_ObjectToWorld._m00_m10_m20 )",
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"{0}.y *= length( unity_ObjectToWorld._m01_m11_m21 )",
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"{0}.z *= length( unity_ObjectToWorld._m02_m12_m22 )",
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"{0} = mul( {0}, rotationCamMatrix )",
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"{0}.xyz += unity_ObjectToWorld._m03_m13_m23",
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"//Need to nullify rotation inserted by generated surface shader",
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"{0} = mul( unity_WorldToObject, {0} )"};
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public static readonly string[] BillboardHDRotDependent = { "//This unfortunately must be made to take non-uniform scaling into account",
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"//Transform to world coords, apply rotation and transform back to local",
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"{0} = mul( {0} , GetObjectToWorldMatrix() ){1}",
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"{0} = mul( {0} , rotationCamMatrix ){1}",
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"{0} = mul( {0} , GetWorldToObjectMatrix() ){1}"};
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public static readonly string[] BillboardHDRotIndependent = { "{0}.x *= length( GetObjectToWorldMatrix()._m00_m10_m20 )",
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"{0}.y *= length( GetObjectToWorldMatrix()._m01_m11_m21 )",
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"{0}.z *= length( GetObjectToWorldMatrix()._m02_m12_m22 )",
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"{0} = mul( {0}, rotationCamMatrix )",
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"{0}.xyz += GetObjectToWorldMatrix()._m03_m13_m23",
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"//Need to nullify rotation inserted by generated surface shader",
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"{0} = mul( GetWorldToObjectMatrix(), {0} )"};
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[SerializeField]
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private bool m_isBillboard = false;
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[SerializeField]
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private BillboardType m_billboardType = BillboardType.Cylindrical;
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[SerializeField]
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private bool m_rotationIndependent = false;
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public void Draw( ParentNode owner )
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{
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bool visible = owner.ContainerGraph.ParentWindow.InnerWindowVariables.ExpandedVertexOptions;
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bool enabled = m_isBillboard;
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NodeUtils.DrawPropertyGroup( owner, ref visible, ref m_isBillboard, BillboardTitleStr, () =>
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{
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m_billboardType = (BillboardType)owner.EditorGUILayoutEnumPopup( BillboardTypeStr, m_billboardType );
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m_rotationIndependent = owner.EditorGUILayoutToggle( BillboardRotIndStr, m_rotationIndependent );
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} );
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owner.ContainerGraph.ParentWindow.InnerWindowVariables.ExpandedVertexOptions = visible;
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if( m_isBillboard != enabled )
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{
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UIUtils.RequestSave();
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}
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}
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public void FillDataCollectorWithInternalData( ref MasterNodeDataCollector dataCollector )
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{
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if( m_isBillboard )
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{
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FillDataCollector( ref dataCollector, m_billboardType, m_rotationIndependent, "v.vertex", "v.normal" , false );
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}
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}
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// This should be called after the Vertex Offset and Vertex Normal ports are analised
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public static void FillDataCollector( ref MasterNodeDataCollector dataCollector, BillboardType billboardType, bool rotationIndependent, string vertexPosValue, string vertexNormalValue, bool vertexIsFloat3 )
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{
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switch( billboardType )
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{
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case BillboardType.Cylindrical:
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{
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for( int i = 0; i < BillboardCylindricalInstructions.Length; i++ )
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{
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dataCollector.AddVertexInstruction( BillboardCylindricalInstructions[ i ] + ( dataCollector.IsTemplate ? ";" : string.Empty ), -1, true );
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}
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}
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break;
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case BillboardType.Spherical:
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{
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for( int i = 0; i < BillboardCylindricalInstructions.Length; i++ )
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{
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dataCollector.AddVertexInstruction( BillboardSphericalInstructions[ i ] + ( dataCollector.IsTemplate ? ";" : string.Empty ), -1, true );
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}
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}
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break;
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}
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for( int i = 0; i < BillboardCommonInstructions.Length; i++ )
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{
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string value = ( i == 3 ) ? string.Format( BillboardCommonInstructions[ i ], vertexNormalValue ) : BillboardCommonInstructions[ i ];
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dataCollector.AddVertexInstruction( value + ( dataCollector.IsTemplate ? ";" : string.Empty ), -1, true );
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}
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if( rotationIndependent )
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{
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for( int i = 0; i < BillboardRotIndependent.Length; i++ )
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{
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string value = string.Empty;
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if( dataCollector.IsTemplate && dataCollector.TemplateDataCollectorInstance.CurrentSRPType == TemplateSRPType.HD )
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{
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value = ( i != 5 ) ? string.Format( BillboardHDRotIndependent[ i ], vertexPosValue ) : BillboardHDRotIndependent[ i ];
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}
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else
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{
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value = ( i != 5 ) ? string.Format( BillboardRotIndependent[ i ], vertexPosValue ) : BillboardRotIndependent[ i ];
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}
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dataCollector.AddVertexInstruction( value + ( dataCollector.IsTemplate ? ";" : string.Empty ), -1, true );
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}
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}
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else
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{
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for( int i = 0; i < BillboardRotDependent.Length; i++ )
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{
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string value = string.Empty;
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if( dataCollector.IsTemplate && dataCollector.TemplateDataCollectorInstance.CurrentSRPType == TemplateSRPType.HD )
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{
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value = ( i > 1 ) ? string.Format( BillboardHDRotDependent[ i ], vertexPosValue, ( vertexIsFloat3 ? ".xyz" : string.Empty ) ) : BillboardHDRotDependent[ i ];
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}
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else
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{
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value = ( i > 1 ) ? string.Format( BillboardRotDependent[ i ], vertexPosValue, ( vertexIsFloat3 ? ".xyz" : string.Empty ) ) : BillboardRotDependent[ i ];
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}
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dataCollector.AddVertexInstruction( value + ( dataCollector.IsTemplate ? ";" : string.Empty ), -1, true );
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}
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}
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}
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public string[] GetInternalMultilineInstructions()
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{
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// This method is only used on Surface ... no HD variation is needed
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return GetMultilineInstructions( m_billboardType, m_rotationIndependent, "v.vertex", "v.normal" );
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}
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public static string[] GetMultilineInstructions( BillboardType billboardType, bool rotationIndependent, string vertexPosValue, string vertexNormalValue )
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{
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// This method is only used on Surface ... no HD variation is needed
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List<string> body = new List<string>();
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switch( billboardType )
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{
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case BillboardType.Cylindrical:
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{
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for( int i = 0; i < BillboardCylindricalInstructions.Length; i++ )
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{
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body.Add( BillboardCylindricalInstructions[ i ] );
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}
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}
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break;
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case BillboardType.Spherical:
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{
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for( int i = 0; i < BillboardCylindricalInstructions.Length; i++ )
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{
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body.Add( BillboardSphericalInstructions[ i ] );
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}
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}
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break;
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}
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for( int i = 0; i < BillboardCommonInstructions.Length; i++ )
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{
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string value = ( i == 3 ) ? string.Format( BillboardCommonInstructions[ i ], vertexNormalValue ) : BillboardCommonInstructions[ i ];
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body.Add( value );
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}
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if( rotationIndependent )
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{
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for( int i = 0; i < BillboardRotIndependent.Length; i++ )
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{
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string value = ( i != 5 ) ? string.Format( BillboardRotIndependent[ i ], vertexPosValue ) : BillboardRotIndependent[ i ];
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body.Add( value );
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}
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}
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else
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{
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for( int i = 0; i < BillboardRotDependent.Length; i++ )
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{
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string value = ( i > 1 ) ? string.Format( BillboardRotDependent[ i ], vertexPosValue ) : BillboardRotDependent[ i ];
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body.Add( value );
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}
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}
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return body.ToArray();
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}
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public void ReadFromString( ref uint index, ref string[] nodeParams )
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{
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m_isBillboard = Convert.ToBoolean( nodeParams[ index++ ] );
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m_billboardType = (BillboardType)Enum.Parse( typeof( BillboardType ), nodeParams[ index++ ] );
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if( UIUtils.CurrentShaderVersion() > 11007 )
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{
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m_rotationIndependent = Convert.ToBoolean( nodeParams[ index++ ] );
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}
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}
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public void WriteToString( ref string nodeInfo )
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{
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IOUtils.AddFieldValueToString( ref nodeInfo, m_isBillboard );
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IOUtils.AddFieldValueToString( ref nodeInfo, m_billboardType );
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IOUtils.AddFieldValueToString( ref nodeInfo, m_rotationIndependent );
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}
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public bool IsBillboard { get { return m_isBillboard; } }
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}
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}
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