private static List<MeshTriangularFace> getTriangles(List<AreaVertex> outline, int start, int stop)
{
List<MeshTriangularFace> triangles = new List<MeshTriangularFace>();
var i = start;
var firstNode = outline.ElementAt(start);
var secondIndex = ++i;
while(i<stop){
var thirdIndex = ++i;
var secondNode = outline.ElementAt(secondIndex);
var thirdNode=outline.ElementAt(thirdIndex);
//var t=thirdIndex;
//bool allRightHanded = true;
/*while (t < stop)
{
var tNode = outline.ElementAt(t++);
if (!isRightHanded(new List<AreaVertex>() { firstNode, secondNode, tNode }))
{
allRightHanded = false;
break;
}
}
if (!allRightHanded) continue;*/
if (!isRightHanded(new List<AreaVertex>() { firstNode, secondNode, thirdNode }) ||
lineIntersect(firstNode, thirdNode, outline) ||
lineIntersect(secondNode, thirdNode, outline))
{
continue;
}
MeshTriangularFace triangle;
triangle = new MeshTriangularFace(start, secondIndex, thirdIndex);
triangles.AddRange(getTriangles(outline, secondIndex, thirdIndex));
secondIndex = thirdIndex;
triangles.Add(triangle);
}
return triangles;
}
protected Area ReadArea(Stream ms)
{
var currentZone = new Area {Content = new AreaContent()};
var buffer = new byte[4];
ms.AssertAreaMagic();
ms.Read(buffer, 0, buffer.Length);
int zoneDataVersion = BitConverter.ToInt32(buffer, 0);
if (zoneDataVersion != 2)
throw new InvalidDataException("Zone data version != 2 not supported!");
ms.Read(buffer, 0, buffer.Length);
currentZone.Id = BitConverter.ToInt32(buffer, 0);
ms.Read(buffer, 0, buffer.Length);
int idStrLen = BitConverter.ToInt32(buffer, 0);
var idStrBuffer = new byte[Utils.RoundToNextDivBy4(idStrLen)];
ms.Read(idStrBuffer, 0, idStrBuffer.Length);
currentZone.Name = Encoding.UTF8.GetString(idStrBuffer).TrimEnd('\0');
ms.AssertAreaMagic();
var attachmentPt = new Point3D();
ms.Read(buffer, 0, buffer.Length);
attachmentPt.X = BitConverter.ToSingle(buffer, 0);
ms.Read(buffer, 0, buffer.Length);
attachmentPt.Y = BitConverter.ToSingle(buffer, 0);
ms.Read(buffer, 0, buffer.Length);
attachmentPt.Z = BitConverter.ToSingle(buffer, 0);
currentZone.AttachmentPoint = attachmentPt;
ms.AssertAreaMagic();
ms.Read(buffer, 0, buffer.Length);
var subParts = BitConverter.ToInt32(buffer, 0);
for (int sp = 0; sp < subParts; sp++)
{
var aced = new AreaClipped();
ms.Read(buffer, 0, buffer.Length);
aced.StartTriangle = BitConverter.ToInt32(buffer, 0);
ms.Read(buffer, 0, buffer.Length);
aced.TriangleCount = BitConverter.ToInt32(buffer, 0);
ms.Read(buffer, 0, buffer.Length);
aced.StartVertex = BitConverter.ToInt32(buffer, 0);
ms.Read(buffer, 0, buffer.Length);
aced.VertexCount = BitConverter.ToInt32(buffer, 0);
currentZone.Content.ClippedAreas.Add(aced);
}
ms.AssertAreaMagic();
ms.Read(buffer, 0, buffer.Length);
currentZone.Content.BorderTriangle.StartTriangle = BitConverter.ToInt32(buffer, 0);
ms.Read(buffer, 0, buffer.Length);
currentZone.Content.BorderTriangle.TriangleCount = BitConverter.ToInt32(buffer, 0);
ms.Read(buffer, 0, buffer.Length);
currentZone.Content.BorderTriangle.StartVertex = BitConverter.ToInt32(buffer, 0);
ms.Read(buffer, 0, buffer.Length);
currentZone.Content.BorderTriangle.VertexCount = BitConverter.ToInt32(buffer, 0);
ms.AssertAreaMagic();
ms.Read(buffer, 0, buffer.Length);
currentZone.Content.BorderVertex.StartVertex = BitConverter.ToInt32(buffer, 0);
ms.Read(buffer, 0, buffer.Length);
currentZone.Content.BorderVertex.VertexCount = BitConverter.ToInt32(buffer, 0);
ms.AssertAreaMagic();
ms.Read(buffer, 0, buffer.Length);
int vertexCount = BitConverter.ToInt32(buffer, 0);
ms.Read(buffer, 0, buffer.Length);
int trianglesCount = BitConverter.ToInt32(buffer, 0);
for (int v = 0; v < vertexCount; v++)
{
var curVertex = new AreaVertex();
ms.Read(buffer, 0, buffer.Length);
curVertex.X = BitConverter.ToSingle(buffer, 0);
ms.Read(buffer, 0, buffer.Length);
curVertex.Y = BitConverter.ToSingle(buffer, 0);
ms.Read(buffer, 0, buffer.Length);
curVertex.Z = BitConverter.ToSingle(buffer, 0);
ms.Read(buffer, 0, buffer.Length);
curVertex.W = BitConverter.ToSingle(buffer, 0);
ms.Read(buffer, 0, buffer.Length);
curVertex.Center = BitConverter.ToSingle(buffer, 0);
currentZone.Content.Vertices.Add(curVertex);
}
ms.AssertAreaMagic();
for (int f = 0; f < trianglesCount; f++)
{
var currentTriangle = new MeshTriangularFace();
ms.Read(buffer, 0, buffer.Length);
currentTriangle.Point1 = BitConverter.ToInt32(buffer, 0);
ms.Read(buffer, 0, buffer.Length);
currentTriangle.Point2 = BitConverter.ToInt32(buffer, 0);
ms.Read(buffer, 0, buffer.Length);
currentTriangle.Point3 = BitConverter.ToInt32(buffer, 0);
currentZone.Content.Triangles.Add(currentTriangle);
}
ms.AssertAreaMagic();
ms.Seek(4, SeekOrigin.Current);
ms.AssertAreaMagic();
ms.Read(buffer, 0, buffer.Length);
if (BitConverter.ToUInt32(buffer, 0) != 809782853)
throw new InvalidDataException("END0 expected!");
return currentZone;
}
private static List<MeshTriangularFace> getBorderTriangles(int count)
{
var lower = count;
var forwardLower = count+1;
var upper = 2*count;
var forwardUpper = 2 * count + 1;
var triangles = new List<MeshTriangularFace>();
for (var i = 0; i < count-1; i++)
{
/*
var triangle1 = new MeshTriangularFace(lower + i, forwardLower + i, upper + i);
var triangle2 = new MeshTriangularFace(upper + i, forwardLower + i, forwardUpper + i);
*/
var triangle1 = new MeshTriangularFace(lower + i, upper + i, forwardLower + i);
var triangle2 = new MeshTriangularFace(upper + i, forwardUpper + i, forwardLower + i);
triangles.Add(triangle1);
triangles.Add(triangle2);
}
var triangle3 = new MeshTriangularFace(2*count-1, lower, 3*count-1);
var triangle4 = new MeshTriangularFace(3 * count - 1, lower, upper);
/*
var triangle3 = new MeshTriangularFace(2 * count - 1, 3 * count - 1, lower);
var triangle4 = new MeshTriangularFace(3 * count - 1, upper, lower);*/
triangles.Add(triangle3);
triangles.Add(triangle4);
return triangles;
}