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https://git.do.srb2.org/STJr/UltimateZoneBuilder.git
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126 lines
2.9 KiB
C#
Executable file
126 lines
2.9 KiB
C#
Executable file
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#region ================== Copyright (c) 2007 Pascal vd Heiden
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/*
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* Copyright (c) 2007 Pascal vd Heiden, www.codeimp.com
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* This program is released under GNU General Public License
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#endregion
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#region ================== Namespaces
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using System.Collections.Generic;
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using CodeImp.DoomBuilder.Map;
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#endregion
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namespace CodeImp.DoomBuilder.Geometry
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{
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public sealed class LinedefTracePath : List<Linedef>
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{
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#region ================== Constants
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#endregion
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#region ================== Variables
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#endregion
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#region ================== Properties
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#endregion
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#region ================== Constructor / Disposer
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// Constructor
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public LinedefTracePath()
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{
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// Initialize
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}
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// Constructor
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public LinedefTracePath(IEnumerable<Linedef> lines) : base(lines)
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{
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// Initialize
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}
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// Constructor
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public LinedefTracePath(ICollection<LinedefSide> lines) : base(lines.Count)
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{
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// Initialize
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foreach(LinedefSide ls in lines) base.Add(ls.Line);
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}
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// Constructor
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public LinedefTracePath(LinedefTracePath p, Linedef add) : base(p)
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{
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// Initialize
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base.Add(add);
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}
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#endregion
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#region ================== Methods
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// This checks if the polygon is closed
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public bool CheckIsClosed()
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{
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// There must be at least 2 sidedefs
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if(base.Count > 1)
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{
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// The end sidedef must share a vertex with the first
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return (base[0].Start == base[base.Count - 1].Start) ||
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(base[0].Start == base[base.Count - 1].End) ||
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(base[0].End == base[base.Count - 1].Start) ||
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(base[0].End == base[base.Count - 1].End);
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}
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else
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{
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// Not closed
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return false;
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}
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}
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// This makes a polygon from the path
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public EarClipPolygon MakePolygon(bool startfront)
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{
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EarClipPolygon p = new EarClipPolygon();
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bool forward = startfront;
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// Any sides at all?
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if(base.Count > 0)
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{
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if(forward)
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p.AddLast(new EarClipVertex(base[0].Start.Position, base[0].Front));
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else
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p.AddLast(new EarClipVertex(base[0].End.Position, base[0].Back));
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// Add all lines, but the first
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for(int i = 1; i < base.Count; i++)
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{
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// Traverse direction changes?
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if((base[i - 1].Start == base[i].Start) ||
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(base[i - 1].End == base[i].End))
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forward = !forward;
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// Add next vertex
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if(forward)
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p.AddLast(new EarClipVertex(base[i].Start.Position, base[i].Front));
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else
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p.AddLast(new EarClipVertex(base[i].End.Position, base[i].Back));
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}
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}
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return p;
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}
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#endregion
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}
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}
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