64 lines
1.6 KiB
Ucode
64 lines
1.6 KiB
Ucode
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/**
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* Copyright 1998-2013 Epic Games, Inc. All Rights Reserved.
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*/
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//=============================================================================
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// VolumetricBuilder: Builds a volumetric brush (criss-crossed sheets).
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//=============================================================================
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class VolumetricBuilder
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extends BrushBuilder;
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var() float Z <ClampMin=0.000001>;
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var() float Radius <ClampMin=0.000001>;
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var() int NumSheets <ClampMin=2>;
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var() name GroupName;
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function BuildVolumetric( int Direction, int InNumSheets, float InZ, float InRadius )
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{
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local int n,x,y;
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local rotator RotStep;
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local vector vtx, NewVtx;
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n = GetVertexCount();
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RotStep.Yaw = 65536.0f / (InNumSheets * 2);
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// Vertices.
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vtx.x = Radius;
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vtx.z = InZ / 2;
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for( x = 0 ; x < (InNumSheets * 2) ; x++ )
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{
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NewVtx = vtx >> (RotStep * x);
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Vertex3f( NewVtx.x, NewVtx.y, NewVtx.z );
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Vertex3f( NewVtx.x, NewVtx.y, NewVtx.z - InZ );
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}
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// Polys.
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for( x = 0 ; x < InNumSheets ; x++ )
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{
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y = (x*2) + 1;
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if( y >= (InNumSheets * 2) ) y -= (InNumSheets * 2);
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Poly4i( Direction, n+(x*2), n+y, n+y+(InNumSheets*2), n+(x*2)+(InNumSheets*2), 'Sheets', true);
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}
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}
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event bool Build()
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{
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if( NumSheets<2 )
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return BadParameters();
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if( Z<=0 || Radius<=0 )
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return BadParameters();
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BeginBrush( true, GroupName );
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BuildVolumetric( +1, NumSheets, Z, Radius );
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return EndBrush();
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}
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defaultproperties
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{
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Z=128
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Radius=64
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NumSheets=2
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GroupName=Volumetric
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BitmapFilename="Btn_Volumetric"
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ToolTip="BrushBuilderName_Volumetric"
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}
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