//mxd
public static Geometry.Plane GetCeilingPlane(Sector s)
{
if (General.Map.UDMF)
{
// UDMF Sector slope?
if (s.CeilSlope.GetLengthSq() > 0 && !float.IsNaN(s.CeilSlopeOffset / s.CeilSlope.z))
{
return(new Geometry.Plane(s.CeilSlope, s.CeilSlopeOffset));
}
if (s.sidedefs.Count == 3)
{
Geometry.Plane ceiling = new Geometry.Plane(new Vector3D(0, 0, -1), s.CeilHeight);
Vector3D[] verts = new Vector3D[3];
bool sloped = false;
int index = 0;
// Check vertices
foreach (Sidedef sd in s.Sidedefs)
{
Vertex v = sd.IsFront ? sd.Line.End : sd.Line.Start;
//create "normal" vertices
verts[index] = new Vector3D(v.Position);
// Check floor
if (!float.IsNaN(v.ZCeiling))
{
//vertex offset is absolute
verts[index].z = v.ZCeiling;
sloped = true;
}
else
{
verts[index].z = ceiling.GetZ(v.Position);
}
index++;
}
// Have slope?
return(sloped ? new Geometry.Plane(verts[0], verts[2], verts[1], false) : ceiling);
}
}
// Have line slope?
foreach (Sidedef side in s.sidedefs)
{
// Carbon copy of EffectLineSlope class here...
if (side.Line.Action == 181 && ((side.Line.Args[1] == 1 && side == side.Line.Front) || side.Line.Args[1] == 2) && side.Other != null)
{
Linedef l = side.Line;
// Find the vertex furthest from the line
Vertex foundv = null;
float founddist = -1.0f;
foreach (Sidedef sd in s.Sidedefs)
{
Vertex v = sd.IsFront ? sd.Line.Start : sd.Line.End;
float d = l.DistanceToSq(v.Position, false);
if (d > founddist)
{
foundv = v;
founddist = d;
}
}
Vector3D v1 = new Vector3D(l.Start.Position.x, l.Start.Position.y, side.Other.Sector.CeilHeight);
Vector3D v2 = new Vector3D(l.End.Position.x, l.End.Position.y, side.Other.Sector.CeilHeight);
Vector3D v3 = new Vector3D(foundv.Position.x, foundv.Position.y, s.CeilHeight);
return(l.SideOfLine(v3) > 0.0f ? new Geometry.Plane(v1, v2, v3, false) : new Geometry.Plane(v2, v1, v3, false));
}
}
//TODO: other types of slopes...
// Normal (flat) ceiling plane
return(new Geometry.Plane(new Vector3D(0, 0, -1), s.CeilHeight));
}