83 lines
2.0 KiB
Ucode
83 lines
2.0 KiB
Ucode
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//=============================================================================
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// ConeBuilder: Builds a 3D cone brush, compatible with cylinder of same size.
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// Copyright 1998-2013 Epic Games, Inc. All Rights Reserved.
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//=============================================================================
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class ConeBuilder
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extends BrushBuilder;
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var() float Z <ClampMin=0.000001>;
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var() float CapZ;
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var() float OuterRadius <ClampMin=0.000001>;
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var() float InnerRadius;
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var() int Sides <ClampMin=3>;
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var() name GroupName;
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var() bool AlignToSide, Hollow;
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function BuildCone( int Direction, bool InAlignToSide, int InSides, float InZ, float Radius, name Item )
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{
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local int n,i,Ofs;
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n = GetVertexCount();
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if( InAlignToSide )
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{
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Radius /= cos(pi/InSides);
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Ofs = 1;
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}
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// Vertices.
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for( i=0; i<InSides; i++ )
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Vertex3f( Radius*sin((2*i+Ofs)*pi/InSides), Radius*cos((2*i+Ofs)*pi/InSides), 0 );
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Vertex3f( 0, 0, InZ );
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// Polys.
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for( i=0; i<InSides; i++ )
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Poly3i( Direction, n+i, n+InSides, n+((i+1)%InSides), Item );
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}
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event bool Build()
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{
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local int i;
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if( Sides<3 )
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return BadParameters();
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if( Z<=0 || OuterRadius<=0 )
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return BadParameters();
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if( Hollow && (InnerRadius<=0 || InnerRadius>=OuterRadius) )
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return BadParameters();
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if( Hollow && CapZ>Z )
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return BadParameters();
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if( Hollow && (CapZ==Z && InnerRadius==OuterRadius) )
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return BadParameters();
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BeginBrush( false, GroupName );
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BuildCone( +1, AlignToSide, Sides, Z, OuterRadius, 'Top' );
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if( Hollow )
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{
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BuildCone( -1, AlignToSide, Sides, CapZ, InnerRadius, 'Cap' );
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if( OuterRadius!=InnerRadius )
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for( i=0; i<Sides; i++ )
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Poly4i( 1, i, ((i+1)%Sides), Sides+1+((i+1)%Sides), Sides+1+i, 'Bottom' );
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}
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else
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{
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PolyBegin( 1, 'Bottom' );
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for( i=0; i<Sides; i++ )
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Polyi( i );
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PolyEnd();
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}
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return EndBrush();
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}
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defaultproperties
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{
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Z=256
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CapZ=256
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OuterRadius=512
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InnerRadius=384
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Sides=8
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GroupName=Cone
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AlignToSide=true
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Hollow=false
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BitmapFilename="Btn_Cone"
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ToolTip="BrushBuilderName_Cone"
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}
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