129 lines
3.8 KiB
Ucode
129 lines
3.8 KiB
Ucode
/**
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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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// SpiralStairBuilder: Builds a spiral staircase.
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//=============================================================================
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class SpiralStairBuilder
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extends BrushBuilder;
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var() int InnerRadius <ClampMin=1>;
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var() int StepWidth <ClampMin=1>;
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var() int StepHeight;
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var() int StepThickness;
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var() int NumStepsPer360 <ClampMin=3>;
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var() int NumSteps <ClampMin=1>;
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var() name GroupName;
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var() bool SlopedCeiling, SlopedFloor, CounterClockwise;
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function BuildCurvedStair( int Direction )
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{
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local rotator RotStep;
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local vector vtx, NewVtx, Template[8];
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local int x, y, idx, VertexStart;
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RotStep.Yaw = 65536.0f * ((360.0f / NumStepsPer360) / 360.0f);
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if( CounterClockwise )
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{
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RotStep.Yaw *= -1;
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Direction *= -1;
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}
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// Generate the vertices for the first stair.
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idx = 0;
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VertexStart = GetVertexCount();
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vtx.x = InnerRadius;
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for( x = 0 ; x < 2 ; x++ )
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{
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NewVtx = vtx >> (RotStep * x);
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vtx.z = 0;
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if( SlopedCeiling && x == 1 )
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vtx.z = StepHeight;
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Vertex3f( NewVtx.x, NewVtx.y, vtx.z );
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Template[idx].x = NewVtx.x; Template[idx].y = NewVtx.y; Template[idx].z = vtx.z; idx++;
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vtx.z = StepThickness;
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if( SlopedFloor && x == 0 )
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vtx.z -= StepHeight;
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Vertex3f( NewVtx.x, NewVtx.y, vtx.z );
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Template[idx].x = NewVtx.x; Template[idx].y = NewVtx.y; Template[idx].z = vtx.z; idx++;
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}
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vtx.x = InnerRadius + StepWidth;
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for( x = 0 ; x < 2 ; x++ )
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{
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NewVtx = vtx >> (RotStep * x);
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vtx.z = 0;
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if( SlopedCeiling && x == 1 )
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vtx.z = StepHeight;
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Vertex3f( NewVtx.x, NewVtx.y, vtx.z );
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Template[idx].x = NewVtx.x; Template[idx].y = NewVtx.y; Template[idx].z = vtx.z; idx++;
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vtx.z = StepThickness;
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if( SlopedFloor && x == 0 )
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vtx.z -= StepHeight;
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Vertex3f( NewVtx.x, NewVtx.y, vtx.z );
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Template[idx].x = NewVtx.x; Template[idx].y = NewVtx.y; Template[idx].z = vtx.z; idx++;
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}
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// Create steps from the template
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for( x = 0 ; x < NumSteps ; x++ )
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{
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if( SlopedFloor )
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{
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Poly3i( Direction, VertexStart + 3, VertexStart + 1, VertexStart + 5, 'steptop' );
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Poly3i( Direction, VertexStart + 3, VertexStart + 5, VertexStart + 7, 'steptop' );
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}
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else
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Poly4i( Direction, VertexStart + 3, VertexStart + 1, VertexStart + 5, VertexStart + 7, 'steptop' );
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Poly4i( Direction, VertexStart + 0, VertexStart + 1, VertexStart + 3, VertexStart + 2, 'inner' );
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Poly4i( Direction, VertexStart + 5, VertexStart + 4, VertexStart + 6, VertexStart + 7, 'outer' );
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Poly4i( Direction, VertexStart + 1, VertexStart + 0, VertexStart + 4, VertexStart + 5, 'stepfront' );
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Poly4i( Direction, VertexStart + 2, VertexStart + 3, VertexStart + 7, VertexStart + 6, 'stepback' );
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if( SlopedCeiling )
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{
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Poly3i( Direction, VertexStart + 0, VertexStart + 2, VertexStart + 6, 'stepbottom' );
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Poly3i( Direction, VertexStart + 0, VertexStart + 6, VertexStart + 4, 'stepbottom' );
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}
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else
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Poly4i( Direction, VertexStart + 0, VertexStart + 2, VertexStart + 6, VertexStart + 4, 'stepbottom' );
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VertexStart = GetVertexCount();
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for( y = 0 ; y < 8 ; y++ )
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{
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NewVtx = Template[y] >> (RotStep * (x + 1));
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Vertex3f( NewVtx.x, NewVtx.y, NewVtx.z + (Stepheight * (x + 1)) );
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}
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}
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}
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event bool Build()
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{
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if( InnerRadius<1 || StepWidth<1 || NumSteps<1 || NumStepsPer360<3 )
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return BadParameters();
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BeginBrush( false, GroupName );
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BuildCurvedStair( +1 );
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return EndBrush();
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}
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defaultproperties
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{
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InnerRadius=64
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StepWidth=256
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StepHeight=16
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StepThickness=32
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NumStepsPer360=8
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NumSteps=8
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SlopedCeiling=true
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SlopedFloor=false
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GroupName="Spiral"
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CounterClockwise=0
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BitmapFilename="Btn_SpiralStairs"
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ToolTip="BrushBuilderName_SpiralStair"
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}
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