private void CreateModelOctree(List <ModelGroup> modelRoots, ModelOctreeNode[] nodes,
CollisionImportSettings settings, uint baseTriCount, int level = 0)
{
for (int i = 0; i < modelRoots.Count; i++)
{
int nodeIndex = modelRoots[i].BlockIndex;
if (modelRoots[i].Children.Count > 0)
{
nodes[nodeIndex].Children = new ModelOctreeNode[ModelOctreeNode.ChildCount];
for (int j = 0; j < ModelOctreeNode.ChildCount; j++)
{
nodes[nodeIndex].Children[j] = new ModelOctreeNode();
}
//Load addtional subidivison models
CreateModelOctree(modelRoots[i].Children, nodes[nodeIndex].Children, settings, baseTriCount, level + 1);
}//If the model has triangle data, add it to our global model list
else if (modelRoots[i].Triangles.Count > 0)
{
var model = new KCLModel(modelRoots[i].Triangles, baseTriCount, Version, settings);
baseTriCount += (uint)modelRoots[i].Triangles.Count;
nodes[nodeIndex].ModelIndex = (uint)Models.Count;
foreach (var index in modelRoots[i].MergedBlockIndices)
{
nodes[index].ModelIndex = (uint)Models.Count;
}
Models.Add(model);
}
}
}
// ---- CONSTRUCTORS & DESTRUCTOR ------------------------------------------------------------------------------
/// <summary>
/// Initializes a new instance of the <see cref="KclFile"/> class, created from the given
/// <paramref name="objModel"/>.
/// </summary>
public KCLFile(List <Triangle> triangles, FileVersion version,
bool isBigEndian, CollisionImportSettings settings = null)
{
if (settings == null)
{
settings = new CollisionImportSettings();
}
Version = version;
ByteOrder = isBigEndian ? ByteOrder.BigEndian : ByteOrder.LittleEndian;
Replace(triangles, settings);
}
/// <summary>
/// Replaces the current collision model from the given
/// <paramref name="objModel"/>.
/// </summary>
/// <param name="objModel">The <see cref="ObjModel"/> to create the collision data from.</param>
public void Replace(List <Triangle> triangles, CollisionImportSettings settings)
{
Stopwatch stopWatch = new Stopwatch();
stopWatch.Start();
// Find the smallest and biggest coordinate (and add padding).
Vector3 minCoordinate = new Vector3(Single.MaxValue, Single.MaxValue, Single.MaxValue);
Vector3 maxCoordinate = new Vector3(Single.MinValue, Single.MinValue, Single.MinValue);
DebugLogger.WriteLine($"Replacing Collision...");
DebugLogger.WriteLine($"Settings:");
DebugLogger.WriteLine($"-MaxRootSize {settings.MaxRootSize}");
DebugLogger.WriteLine($"-MaxTrianglesInCube {settings.MaxTrianglesInCube}");
DebugLogger.WriteLine($"-MinCubeSize {settings.MinCubeSize}");
DebugLogger.WriteLine($"-PaddingMax {settings.PaddingMax}");
DebugLogger.WriteLine($"-PaddingMin {settings.PaddingMin}");
DebugLogger.WriteLine($"-PrismThickness {settings.PrismThickness}");
DebugLogger.WriteLine($"-SphereRadius {settings.SphereRadius}");
DebugLogger.WriteLine($"Calculating bounding sizes...");
for (int i = 0; i < triangles.Count; i++)
{
for (int v = 0; v < triangles[i].Vertices.Length; v++)
{
Vector3 position = triangles[i].Vertices[v];
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, maxCoordinate.X);
maxCoordinate.Y = Math.Max(position.Y, maxCoordinate.Y);
maxCoordinate.Z = Math.Max(position.Z, maxCoordinate.Z);
}
}
MinCoordinate = minCoordinate + settings.PaddingMin;
MaxCoordinate = maxCoordinate + settings.PaddingMax;
DebugLogger.WriteLine($"MinCoordinate: {MinCoordinate}");
DebugLogger.WriteLine($"MaxCoordinate: {MaxCoordinate}");
// Compute square cube size of the world, and with it the coordinate shift for use with the model octree.
Vector3 size = MaxCoordinate - MinCoordinate;
int worldLengthExp = Maths.GetNext2Exponent(Math.Min(Math.Min(size.X, size.Y), size.Z));
int cubeSize = 1 << worldLengthExp;
Vector3 exponents = new Vector3(
Maths.GetNext2Exponent(size.X),
Maths.GetNext2Exponent(size.Y),
Maths.GetNext2Exponent(size.Z));
CoordinateShift = new Vector3U(
(uint)(exponents.X),
(uint)(exponents.Y),
(uint)(exponents.Z));
Models = new List <KCLModel>();
Vector3 boxSize = new Vector3(
1 << (int)CoordinateShift.X,
1 << (int)CoordinateShift.Y,
1 << (int)CoordinateShift.Z);
DebugLogger.WriteLine($"Model Octree Bounds: {boxSize}");
//Create subdivied triangle models
var modelRoots = CreateModelDivision(MinCoordinate, triangles, boxSize / 2f);
//For a model octree, we need 8 octrees per division
ModelOctreeRoot = new ModelOctreeNode();
ModelOctreeRoot.Children = new ModelOctreeNode[ModelOctreeNode.ChildCount];
for (int i = 0; i < ModelOctreeNode.ChildCount; i++)
{
ModelOctreeRoot.Children[i] = new ModelOctreeNode();
}
Models.Clear();
//Load all the model data
CreateModelOctree(modelRoots, ModelOctreeRoot.Children, settings, 0);
PrismCount = Models.Sum(x => x.Prisms.Length);
stopWatch.Stop();
DebugLogger.WriteLine($"Model Octree:");
PrintModelOctree(ModelOctreeRoot.Children);
DebugLogger.WriteLine($"Finished Collsion Generation {stopWatch.Elapsed}");
}
public KCLModel(List <Triangle> triangleList, uint baseTriCount,
FileVersion version, CollisionImportSettings settings)
{
// Transfer the faces to collision faces and find the smallest and biggest coordinates.
Vector3 minCoordinate = new Vector3(Single.MaxValue, Single.MaxValue, Single.MaxValue);
Vector3 maxCoordinate = new Vector3(Single.MinValue, Single.MinValue, Single.MinValue);
List <KclPrism> prismList = new List <KclPrism>();
Dictionary <ushort, Triangle> triangles = new Dictionary <ushort, Triangle>();
Positions = new List <Vector3>();
Normals = new List <Vector3>();
Prisms = new KclPrism[0];
Version = version;
PrismThickness = settings.PrismThickness;
SphereRadius = settings.SphereRadius;
Dictionary <string, int> positionTable = new Dictionary <string, int>();
Dictionary <string, int> normalTable = new Dictionary <string, int>();
ushort triindex = 0;
for (int i = 0; i < triangleList.Count; i++)
{
var triangle = triangleList[i];
Vector3 direction = Vector3.Cross(
triangle.Vertices[1] - triangle.Vertices[0],
triangle.Vertices[2] - triangle.Vertices[0]);
if ((direction.X * direction.X + direction.Y * direction.Y + direction.Z * direction.Z) < 0.01)
{
continue;
}
direction = Vector3.Normalize(direction);
// Get the position vectors and find the smallest and biggest coordinates.
for (int j = 0; j < 3; j++)
{
Vector3 position = triangle.Vertices[j];
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, maxCoordinate.X);
maxCoordinate.Y = Math.Max(position.Y, maxCoordinate.Y);
maxCoordinate.Z = Math.Max(position.Z, maxCoordinate.Z);
}
//Calculate the ABC normal values.
Vector3 normalA = Vector3.Cross(direction,
triangle.Vertices[2] - triangle.Vertices[0]);
Vector3 normalB = (-(Vector3.Cross(direction,
triangle.Vertices[1] - triangle.Vertices[0])));
Vector3 normalC = Vector3.Cross(direction,
triangle.Vertices[1] - triangle.Vertices[2]);
//Normalize the ABC normal values.
normalA = Vector3.Normalize(normalA);
normalB = Vector3.Normalize(normalB);
normalC = Vector3.Normalize(normalC);
//Create a KCL Prism
KclPrism face = new KclPrism()
{
PositionIndex = (ushort)IndexOfVertex(triangle.Vertices[0], Positions, positionTable),
DirectionIndex = (ushort)IndexOfVertex(direction, Normals, normalTable),
Normal1Index = (ushort)IndexOfVertex(normalA, Normals, normalTable),
Normal2Index = (ushort)IndexOfVertex(normalB, Normals, normalTable),
Normal3Index = (ushort)IndexOfVertex(normalC, Normals, normalTable),
GlobalIndex = baseTriCount + (uint)prismList.Count,
CollisionFlags = triangle.Attribute,
};
// Compute the face direction (normal) and add it to the normal list.
triangles.Add((ushort)triindex++, triangle);
//Compute the length
float length = Vector3.Dot(triangle.Vertices[1] - triangle.Vertices[0], normalC);
face.Length = length;
prismList.Add(face);
}
positionTable.Clear();
normalTable.Clear();
//No triangles found to intersect the current box, return.
if (prismList.Count == 0)
{
return;
}
//Padd the coordinates
minCoordinate += settings.PaddingMin;
maxCoordinate += settings.PaddingMax;
MinCoordinate = minCoordinate;
Prisms = prismList.ToArray();
// Compute the octree.
Vector3 size = maxCoordinate - minCoordinate;
Vector3U exponents = new Vector3U(
(uint)Maths.GetNext2Exponent(size.X),
(uint)Maths.GetNext2Exponent(size.Y),
(uint)Maths.GetNext2Exponent(size.Z));
int cubeSizePower = Maths.GetNext2Exponent(Math.Min(Math.Min(size.X, size.Y), size.Z));
if (cubeSizePower > Maths.GetNext2Exponent(settings.MaxRootSize))
{
cubeSizePower = Maths.GetNext2Exponent(settings.MaxRootSize);
}
int cubeSize = 1 << cubeSizePower;
CoordinateShift = new Vector3U(
(uint)cubeSizePower,
(uint)(exponents.X - cubeSizePower),
(uint)(exponents.X - cubeSizePower + exponents.Y - cubeSizePower));
CoordinateMask = new Vector3U(
(uint)(0xFFFFFFFF << (int)exponents.X),
(uint)(0xFFFFFFFF << (int)exponents.Y),
(uint)(0xFFFFFFFF << (int)exponents.Z));
Vector3U cubeCounts = new Vector3U(
(uint)Math.Max(1, (1 << (int)exponents.X) / cubeSize),
(uint)Math.Max(1, (1 << (int)exponents.Y) / cubeSize),
(uint)Math.Max(1, (1 << (int)exponents.Z) / cubeSize));
// Generate the root nodes, which are square cubes required to cover all of the model.
PolygonOctreeRoots = new PolygonOctree[cubeCounts.X * cubeCounts.Y * cubeCounts.Z];
int cubeBlow = SphereRadius > 0 ? (int)(SphereRadius * 2) : 50;
DebugLogger.WriteLine($"Octree Distance Bias {cubeBlow}");
DebugLogger.WriteLine($"Creating Octrees {cubeCounts}");
int index = 0;
for (int z = 0; z < cubeCounts.Z; z++)
{
for (int y = 0; y < cubeCounts.Y; y++)
{
for (int x = 0; x < cubeCounts.X; x++)
{
Vector3 cubePosition = minCoordinate + ((float)cubeSize) * new Vector3(x, y, z);
PolygonOctreeRoots[index++] = new PolygonOctree(triangles, cubePosition, cubeSize,
settings.MaxTrianglesInCube, settings.MaxCubeSize,
settings.MinCubeSize, cubeBlow, settings.MaxOctreeDepth);
}
}
}
DebugLogger.WriteLine($"Finished Octree");
}
