/// <summary>
/// Loads the data from the given <paramref name="stream"/>.
/// </summary>
/// <param name="stream">The <see cref="Stream"/> to load the data from.</param>
/// <param name="loadOctree"><c>true</c> to also load the octree referencing triangles.</param>
public void Load(Stream stream, bool loadOctree)
{
using (BinaryDataReader reader = new BinaryDataReader(stream, true)
{
ByteOrder = ByteOrder.BigEndian
})
{
long modelPosition = reader.Position;
// Read the header.
int positionArrayOffset = reader.ReadInt32();
int normalArrayOffset = reader.ReadInt32();
int triangleArrayOffset = reader.ReadInt32();
int octreeOffset = reader.ReadInt32();
Unknown1 = reader.ReadSingle();
MinCoordinate = reader.ReadVector3F();
CoordinateMask = reader.ReadVector3();
CoordinateShift = reader.ReadVector3();
Unknown2 = reader.ReadSingle();
// Read the positions.
reader.Position = modelPosition + positionArrayOffset; // Mostly unrequired, data is successive.
int positionCount = (normalArrayOffset - positionArrayOffset) / Vector3F.SizeInBytes;
Positions = reader.ReadVector3Fs(positionCount);
// Read the normals.
reader.Position = modelPosition + normalArrayOffset; // Mostly unrequired, data is successive.
int normalCount = (triangleArrayOffset - normalArrayOffset) / Vector3F.SizeInBytes;
Normals = reader.ReadVector3Fs(normalCount);
// Read the triangles.
reader.Position = modelPosition + triangleArrayOffset; // Mostly unrequired, data is successive.
int triangleCount = (octreeOffset - triangleArrayOffset) / Marshal.SizeOf <Triangle>();
Triangles = reader.ReadTriangles(triangleCount);
// Read the octree.
if (loadOctree)
{
reader.Position = modelPosition + octreeOffset; // Mostly unrequired, data is successive.
int nodeCount
= ((~CoordinateMask.X >> CoordinateShift.X) + 1)
* ((~CoordinateMask.Y >> CoordinateShift.X) + 1)
* ((~CoordinateMask.Z >> CoordinateShift.X) + 1);
ModelOctreeRoots = new ModelOctreeNode[nodeCount];
for (int i = 0; i < nodeCount; i++)
{
ModelOctreeRoots[i] = new ModelOctreeNode(null, reader, modelPosition + octreeOffset);
}
// Reader is now behind the last octree key, not at end of the model / behind the last separator.
}
}
}
/// <summary>
/// Loads the data from the given <paramref name="stream"/>.
/// </summary>
/// <param name="stream">The <see cref="Stream"/> to load the data from.</param>
/// <param name="loadOctree"><c>true</c> to also load the octree referencing triangles.</param>
/// <param name="leaveOpen"><c>true</c> to leave <paramref name="stream"/> open after loading the instance.
/// </param>
public void Load(Stream stream, bool loadOctree = true, bool leaveOpen = false, ByteOrder Endianness = ByteOrder.LittleEndian)
{
using (BinaryDataReader reader = new BinaryDataReader(stream, leaveOpen))
{
reader.ByteOrder = Endianness;
long modelPosition = reader.Position;
// Read the header.
int positionArrayOffset = reader.ReadInt32();
int normalArrayOffset = reader.ReadInt32();
int triangleArrayOffset = reader.ReadInt32();
int octreeOffset = reader.ReadInt32();
reader.Seek(sizeof(float)); // Unknown value always being 30.0.
MinCoordinate = reader.ReadVector3F();
CoordinateMask = reader.ReadVector3();
CoordinateShift = reader.ReadVector3();
reader.Seek(sizeof(float)); // Unknown value always being 25.0.
// Read the positions.
reader.Position = modelPosition + positionArrayOffset; // Mostly unrequired, data is successive.
int positionCount = (normalArrayOffset - positionArrayOffset) / Vector3F.SizeInBytes;
Positions = new List <Vector3F>(reader.ReadVector3Fs(positionCount));
// Read the normals.
reader.Position = modelPosition + normalArrayOffset; // Mostly unrequired, data is successive.
int normalCount = (triangleArrayOffset - normalArrayOffset) / Vector3F.SizeInBytes;
Normals = new List <Vector3F>(reader.ReadVector3Fs(normalCount));
// Read the triangles.
reader.Position = modelPosition + triangleArrayOffset; // Mostly unrequired, data is successive.
int triangleCount = (octreeOffset - triangleArrayOffset) / Marshal.SizeOf <KclFace>();
Faces = reader.ReadTriangles(triangleCount);
// Read the octree.
if (loadOctree)
{
reader.Position = modelPosition + octreeOffset; // Mostly unrequired, data is successive.
int nodeCount
= ((~CoordinateMask.X >> CoordinateShift.X) + 1)
* ((~CoordinateMask.Y >> CoordinateShift.X) + 1)
* ((~CoordinateMask.Z >> CoordinateShift.X) + 1);
ModelOctreeRoots = new ModelOctreeNode[nodeCount];
for (int i = 0; i < nodeCount; i++)
{
ModelOctreeRoots[i] = new ModelOctreeNode(reader, modelPosition + octreeOffset);
}
// Reader is now behind the last octree key, not at end of the model / behind the last separator.
}
}
}
/// <summary>
/// Initializes a new instance of the <see cref="KclModel"/> class, created from the given
/// <paramref name="objModel"/>.
/// </summary>
/// <param name="objModel">The <see cref="ObjModel"/> to create the collision data from.</param>
internal KclModel(ObjModel objModel)
{
if (objModel.Faces.Count > UInt16.MaxValue)
{
throw new InvalidOperationException("KCL models must not have more than 65535 triangles.");
}
// Transfer the faces to collision faces and find the smallest and biggest coordinates.
Positions = new List <Vector3F>(objModel.Positions);
Normals = new List <Vector3F>(objModel.Normals);
Vector3F minCoordinate = new Vector3F(Single.MaxValue, Single.MaxValue, Single.MaxValue);
Vector3F maxCoordinate = new Vector3F(Single.MinValue, Single.MinValue, Single.MinValue);
KclFace[] faces = new KclFace[objModel.Faces.Count];
Triangle triangle = new Triangle();
Dictionary <ushort, Triangle> triangles = new Dictionary <ushort, Triangle>(objModel.Faces.Count);
ushort i = 0;
foreach (ObjFace objFace in objModel.Faces)
{
KclFace face = new KclFace()
{
PositionIndex = (ushort)objFace.Vertices[0].PositionIndex,
Normal1Index = (ushort)objFace.Vertices[0].NormalIndex,
Normal2Index = (ushort)objFace.Vertices[1].NormalIndex,
Normal3Index = (ushort)objFace.Vertices[2].NormalIndex
};
// Get the position vectors and find the smallest and biggest coordinates.
for (int j = 0; j < 3; j++)
{
Vector3F position = Positions[objFace.Vertices[j].PositionIndex];
minCoordinate.X = Math.Min(position.X, minCoordinate.X);
minCoordinate.Y = Math.Min(position.Y, minCoordinate.Y);
minCoordinate.Z = Math.Min(position.Z, minCoordinate.Z);
maxCoordinate.X = Math.Max(position.X, minCoordinate.X);
maxCoordinate.Y = Math.Max(position.X, minCoordinate.Y);
maxCoordinate.Z = Math.Max(position.X, minCoordinate.Z);
triangle.Vertices[j] = position;
}
// Compute the face direction (normal) and add it to the normal list.
face.DirectionIndex = (ushort)(Normals.Count);
Normals.Add(triangle.Normal);
triangles.Add(i, triangle);
faces[i++] = face;
}
minCoordinate += _minCoordinatePadding;
maxCoordinate += _maxCoordinatePadding;
MinCoordinate = minCoordinate;
Faces = faces;
// Compute the octree.
Vector3F size = maxCoordinate - minCoordinate;
Vector3 exponents = new Vector3(
Maths.GetNext2Exponent(size.X),
Maths.GetNext2Exponent(size.Y),
Maths.GetNext2Exponent(size.Z));
int cubeSizePower = Maths.GetNext2Exponent(Math.Min(Math.Min(size.X, size.Y), size.Z));
int cubeSize = 1 << cubeSizePower;
CoordinateShift = new Vector3(
cubeSizePower,
exponents.X - cubeSizePower,
exponents.X - cubeSizePower + exponents.Y - cubeSizePower);
CoordinateMask = new Vector3(
(int)(0xFFFFFFFF << exponents.X),
(int)(0xFFFFFFFF << exponents.Y),
(int)(0xFFFFFFFF << exponents.Z));
Vector3 cubeCounts = new Vector3(
Math.Max(1, (1 << exponents.X) / cubeSize),
Math.Max(1, (1 << exponents.Y) / cubeSize),
Math.Max(1, (1 << exponents.Z) / cubeSize));
// Generate the root nodes, which are square cubes required to cover all of the model.
ModelOctreeRoots = new ModelOctreeNode[cubeCounts.X * cubeCounts.Y * cubeCounts.Z];
i = 0;
for (int z = 0; z < cubeCounts.Z; z++)
{
for (int y = 0; y < cubeCounts.Y; y++)
{
for (int x = 0; x < cubeCounts.X; x++)
{
Vector3F cubePosition = new Vector3F(x, y, z) * cubeSize + minCoordinate;
ModelOctreeRoots[i++] = new ModelOctreeNode(triangles, cubePosition, cubeSize,
_maxTrianglesInCube, _minCubeSize);
}
}
}
}
