70 lines
2.1 KiB
Ucode
70 lines
2.1 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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// TetrahedronBuilder: Builds an octahedron (not tetrahedron) - experimental.
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//=============================================================================
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class TetrahedronBuilder
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extends BrushBuilder;
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var() float Radius <ClampMin=0.000001>;
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var() int SphereExtrapolation <ClampMin=1 | ClampMax=5>;
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var() name GroupName;
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function Extrapolate( int a, int b, int c, int Count, float InRadius )
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{
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local int ab,bc,ca;
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if( Count>1 )
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{
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ab=Vertexv( InRadius*Normal(GetVertex(a)+GetVertex(b)) );
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bc=Vertexv( InRadius*Normal(GetVertex(b)+GetVertex(c)) );
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ca=Vertexv( InRadius*Normal(GetVertex(c)+GetVertex(a)) );
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Extrapolate(a,ab,ca,Count-1,InRadius);
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Extrapolate(b,bc,ab,Count-1,InRadius);
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Extrapolate(c,ca,bc,Count-1,InRadius);
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Extrapolate(ab,bc,ca,Count-1,InRadius);
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//wastes shared vertices
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}
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else Poly3i(+1,a,b,c);
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}
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function BuildTetrahedron( float R, int InSphereExtrapolation )
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{
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vertex3f( R,0,0);
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vertex3f(-R,0,0);
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vertex3f(0, R,0);
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vertex3f(0,-R,0);
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vertex3f(0,0, R);
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vertex3f(0,0,-R);
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Extrapolate(2,1,4,InSphereExtrapolation,Radius);
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Extrapolate(1,3,4,InSphereExtrapolation,Radius);
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Extrapolate(3,0,4,InSphereExtrapolation,Radius);
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Extrapolate(0,2,4,InSphereExtrapolation,Radius);
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Extrapolate(1,2,5,InSphereExtrapolation,Radius);
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Extrapolate(3,1,5,InSphereExtrapolation,Radius);
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Extrapolate(0,3,5,InSphereExtrapolation,Radius);
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Extrapolate(2,0,5,InSphereExtrapolation,Radius);
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}
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event bool Build()
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{
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if( Radius<=0 || SphereExtrapolation<=0 )
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return BadParameters();
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if( SphereExtrapolation > 5 )
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return BadParameters( "Setting 'SphereExtrapolation' to more than 5 is invalid. The resulting brush will have too many polygons to be useful.");
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BeginBrush( false, GroupName );
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BuildTetrahedron( Radius, SphereExtrapolation );
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return EndBrush();
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}
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defaultproperties
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{
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Radius=256
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SphereExtrapolation=1
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GroupName=Tetrahedron
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BitmapFilename="Btn_Sphere"
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ToolTip="BrushBuilderName_Tetrahedron"
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}
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