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Fixed a tiny inaccuracy on a rare occasion in the sector triangulation code

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codeimp 2010-09-01 13:04:16 +00:00
parent 6f17b98b6b
commit 446e3d40d0
1 changed files with 9 additions and 4 deletions
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7
Source/Core/Geometry/Triangulation.cs
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@ -509,6 +509,7 @@ namespace CodeImp.DoomBuilder.Geometry
LinkedListNode<EarClipVertex> v1, v2;
LinkedListNode<EarClipVertex> insertbefore = null;
float u, ul, bonus, foundu = float.MaxValue;
Vector2D foundpos = new Vector2D();
EarClipVertex split;
// Create a line from start that goes beyond the right most vertex of p
@ -555,6 +556,7 @@ namespace CodeImp.DoomBuilder.Geometry
if(ul < 0.0f) ul = float.MaxValue;
float insert_u = Math.Min(u, ul);
Vector2D inserpos = starttoright.GetCoordinatesAt(insert_u);
// Check in which direction the line goes.
if(v1.Value.Position.x > v2.Value.Position.x)
@ -574,6 +576,7 @@ namespace CodeImp.DoomBuilder.Geometry
{
insertbefore = v2.Next ?? v2.List.First;
foundu = insert_u;
foundpos = inserpos;
}
}
else
@ -593,6 +596,7 @@ namespace CodeImp.DoomBuilder.Geometry
{
insertbefore = v2;
foundu = insert_u;
foundpos = inserpos;
}
}
}
@ -603,6 +607,7 @@ namespace CodeImp.DoomBuilder.Geometry
// Found a closer intersection
insertbefore = v2;
foundu = u;
foundpos = starttoright.GetCoordinatesAt(u);
}
}
@ -617,7 +622,7 @@ namespace CodeImp.DoomBuilder.Geometry
Sidedef sd = (insertbefore.Previous == null) ? insertbefore.List.Last.Value.Sidedef : insertbefore.Previous.Value.Sidedef;
// Find the position where we have to split the outer polygon
split = new EarClipVertex(starttoright.GetCoordinatesAt(foundu), null);
split = new EarClipVertex(foundpos, null);
// Insert manual split vertices
p.AddBefore(insertbefore, new EarClipVertex(split, sd));