///
/// <summary>
/// Add a new cluster to the set of clusters which are getting rendered. If the cluster has already been added, this is effectively a no-op
/// </summary>
///
/// <param name="clusterBaseWorldPosition">
/// The base position of the cluster in world coordaintes (i.e. the minimum corner of the cluster bounding box)
/// </param>
///
/// <param name="clusterIndex">
/// The integer ID of the cluster, used to index into lists of cluster specific data
/// </param>
///
/// <param name="clusterCubeIndices">
/// An array of indices into the input cubes list indicating which cubes make up a given cluster. The array is 4 dimensional
/// where array[clusterIndex, x, y, z] will get you the index of the cube at local grid position x, y, z in the cluster (or
/// -1 if there is no cube in that grid position)
/// </param>
///
/// <param name="cubes">
/// A master list of cubes that the clusterCubeIndices references
/// </param>
///
/// <param name="graphicsDevice">
/// A graphics device instance, needed to build up vertex buffer objects in advance
/// </param>
///
public void AddActiveCluster(Vector3 clusterBaseWorldPosition, int clusterIndex, int[, , ,] clusterCubeIndices, Model[] cubes, GraphicsDevice graphicsDevice)
{
// Do nothing if the cluster has already been added
if (_clusterRenderData.ContainsKey(clusterIndex))
{
return;
}
RenderData renderData = new RenderData();
_clusterRenderData.Add(clusterIndex, renderData);
BoundingBox clusterBoundingBox = new BoundingBox(
new Vector3(
-(_cubeSize * _clusterXDimension / 2),
-(_cubeSize * _clusterYDimension / 2),
-(_cubeSize * _clusterZDimension / 2)),
new Vector3(
_cubeSize * _clusterXDimension / 2,
_cubeSize * _clusterYDimension / 2,
_cubeSize * _clusterZDimension / 2));
Vector3 clusterCentroid = clusterBaseWorldPosition + new Vector3(_clusterXDimension, _clusterYDimension, _clusterZDimension) * _cubeSize / 2;
Octrees.Add(clusterIndex, new Octree(clusterBoundingBox, clusterCentroid));
// Build up the different positions of each model used within a cluster
ModelData clusterModelData = new ModelData();
for (int x = 0; x < _clusterXDimension; ++x)
{
for (int y = 0; y < _clusterYDimension; ++y)
{
for (int z = 0; z < _clusterZDimension; ++z)
{
int modelIndex = clusterCubeIndices[clusterIndex, x, y, z];
if (modelIndex != -1)
{
Model model = cubes[modelIndex];
int clusterModelIndex = clusterModelData.FindIndex(model);
if (clusterModelIndex == -1)
{
clusterModelData.Add(model, new List<Vector3>());
clusterModelIndex = clusterModelData.Count - 1;
}
clusterModelData.ModelPositions(clusterModelIndex).Add(new Vector3(
clusterBaseWorldPosition.X + (x * _cubeSize),
clusterBaseWorldPosition.Y + (y * _cubeSize),
clusterBaseWorldPosition.Z + (z * _cubeSize)));
}
}
}
}
List<BoundingBox> boundingBoxes = new List<BoundingBox>();
List<Vector3> cubePositions = new List<Vector3>();
for (int modelIndex = 0; modelIndex < clusterModelData.Count; ++modelIndex)
{
Model model = clusterModelData.Models(modelIndex);
List<Vector3> positions = clusterModelData.ModelPositions(modelIndex);
List<VertexPositionNormalTexture> vertices;
List<int> indices;
GetModelVerticesAndIndices(model, out vertices, out indices);
List<VertexPositionNormalTexture> finalVertices = new List<VertexPositionNormalTexture>();
List<int> finalIndices = new List<int>();
int vertexCount = vertices.Count;
foreach (Vector3 position in positions)
{
VertexPositionNormalTexture[] translatedCopy = new VertexPositionNormalTexture[vertices.Count];
vertices.CopyTo(translatedCopy);
Matrix translation = Matrix.CreateTranslation((position) + Vector3.One);
Vector3[] translatedPositions = new Vector3[translatedCopy.Length];
for (int i = 0; i < translatedCopy.Length; ++i)
{
translatedCopy[i].Position = Vector3.Transform(translatedCopy[i].Position, translation);
translatedPositions[i] = translatedCopy[i].Position;
}
boundingBoxes.Add(BoundingBox.CreateFromPoints(translatedPositions));
cubePositions.Add(position);
finalIndices.AddRange(indices);
for (int i = 0; i < indices.Count(); ++i)
{
indices[i] += (int)vertexCount;
}
finalVertices.AddRange(translatedCopy);
}
VertexBuffer newVertexBuffer = new VertexBuffer(graphicsDevice, typeof(VertexPositionNormalTexture), finalVertices.Count, BufferUsage.None);
newVertexBuffer.SetData<VertexPositionNormalTexture>(finalVertices.ToArray());
IndexBuffer newIndexBuffer = new IndexBuffer(graphicsDevice, typeof(int), finalIndices.Count, BufferUsage.None);
newIndexBuffer.SetData<int>(finalIndices.ToArray());
renderData.AddData(newVertexBuffer, newIndexBuffer, model);
}
Octrees[clusterIndex].AddItems(cubePositions.ToArray(), boundingBoxes.ToArray());
int count = Octrees[clusterIndex].Count;
_allModels.Clear();
_allVertexBuffers.Clear();
_allIndexBuffers.Clear();
foreach (RenderData data in _clusterRenderData.Values)
{
ReadOnlyCollection<Model> models;
ReadOnlyCollection<VertexBuffer> vertexBuffers;
ReadOnlyCollection<IndexBuffer> indexBuffers;
data.GetData(out vertexBuffers, out indexBuffers, out models);
_allModels.AddRange(models);
_allVertexBuffers.AddRange(vertexBuffers);
_allIndexBuffers.AddRange(indexBuffers);
}
}
///
/// <summary>
/// Add a new cluster to the set of clusters which are getting rendered. If the cluster has already been added, this is effectively a no-op
/// </summary>
///
/// <param name="clusterBaseWorldPosition">
/// The base position of the cluster in world coordaintes (i.e. the minimum corner of the cluster bounding box)
/// </param>
///
/// <param name="clusterIndex">
/// The integer ID of the cluster, used to index into lists of cluster specific data
/// </param>
///
/// <param name="clusterCubeIndices">
/// An array of indices into the input cubes list indicating which cubes make up a given cluster. The array is 4 dimensional
/// where array[clusterIndex, x, y, z] will get you the index of the cube at local grid position x, y, z in the cluster (or
/// -1 if there is no cube in that grid position)
/// </param>
///
/// <param name="cubes">
/// A master list of cubes that the clusterCubeIndices references
/// </param>
///
/// <param name="graphicsDevice">
/// A graphics device instance, needed to build up vertex buffer objects in advance
/// </param>
///
public void AddActiveCluster(Vector3 clusterBaseWorldPosition, int clusterIndex, int[, , ,] clusterCubeIndices, Model[] cubes, GraphicsDevice graphicsDevice)
{
// Do nothing if the cluster has already been added
if (_clusterRenderData.ContainsKey(clusterIndex))
{
return;
}
RenderData renderData = new RenderData();
_clusterRenderData.Add(clusterIndex, renderData);
BoundingBox clusterBoundingBox = new BoundingBox(
new Vector3(
-(_cubeSize * _clusterXDimension / 2),
-(_cubeSize * _clusterYDimension / 2),
-(_cubeSize * _clusterZDimension / 2)),
new Vector3(
_cubeSize * _clusterXDimension / 2,
_cubeSize * _clusterYDimension / 2,
_cubeSize * _clusterZDimension / 2));
Vector3 clusterCentroid = clusterBaseWorldPosition + new Vector3(_clusterXDimension, _clusterYDimension, _clusterZDimension) * _cubeSize / 2;
Octrees.Add(clusterIndex, new Octree(clusterBoundingBox, clusterCentroid));
// Build up the different positions of each model used within a cluster
ModelData clusterModelData = new ModelData();
for (int x = 0; x < _clusterXDimension; ++x)
{
for (int y = 0; y < _clusterYDimension; ++y)
{
for (int z = 0; z < _clusterZDimension; ++z)
{
int modelIndex = clusterCubeIndices[clusterIndex, x, y, z];
if (modelIndex != -1)
{
Model model = cubes[modelIndex];
int clusterModelIndex = clusterModelData.FindIndex(model);
if (clusterModelIndex == -1)
{
clusterModelData.Add(model, new List <Vector3>());
clusterModelIndex = clusterModelData.Count - 1;
}
clusterModelData.ModelPositions(clusterModelIndex).Add(new Vector3(
clusterBaseWorldPosition.X + (x * _cubeSize),
clusterBaseWorldPosition.Y + (y * _cubeSize),
clusterBaseWorldPosition.Z + (z * _cubeSize)));
}
}
}
}
List <BoundingBox> boundingBoxes = new List <BoundingBox>();
List <Vector3> cubePositions = new List <Vector3>();
for (int modelIndex = 0; modelIndex < clusterModelData.Count; ++modelIndex)
{
Model model = clusterModelData.Models(modelIndex);
List <Vector3> positions = clusterModelData.ModelPositions(modelIndex);
List <VertexPositionNormalTexture> vertices;
List <int> indices;
GetModelVerticesAndIndices(model, out vertices, out indices);
List <VertexPositionNormalTexture> finalVertices = new List <VertexPositionNormalTexture>();
List <int> finalIndices = new List <int>();
int vertexCount = vertices.Count;
foreach (Vector3 position in positions)
{
VertexPositionNormalTexture[] translatedCopy = new VertexPositionNormalTexture[vertices.Count];
vertices.CopyTo(translatedCopy);
Matrix translation = Matrix.CreateTranslation((position) + Vector3.One);
Vector3[] translatedPositions = new Vector3[translatedCopy.Length];
for (int i = 0; i < translatedCopy.Length; ++i)
{
translatedCopy[i].Position = Vector3.Transform(translatedCopy[i].Position, translation);
translatedPositions[i] = translatedCopy[i].Position;
}
boundingBoxes.Add(BoundingBox.CreateFromPoints(translatedPositions));
cubePositions.Add(position);
finalIndices.AddRange(indices);
for (int i = 0; i < indices.Count(); ++i)
{
indices[i] += (int)vertexCount;
}
finalVertices.AddRange(translatedCopy);
}
VertexBuffer newVertexBuffer = new VertexBuffer(graphicsDevice, typeof(VertexPositionNormalTexture), finalVertices.Count, BufferUsage.None);
newVertexBuffer.SetData <VertexPositionNormalTexture>(finalVertices.ToArray());
IndexBuffer newIndexBuffer = new IndexBuffer(graphicsDevice, typeof(int), finalIndices.Count, BufferUsage.None);
newIndexBuffer.SetData <int>(finalIndices.ToArray());
renderData.AddData(newVertexBuffer, newIndexBuffer, model);
}
Octrees[clusterIndex].AddItems(cubePositions.ToArray(), boundingBoxes.ToArray());
int count = Octrees[clusterIndex].Count;
_allModels.Clear();
_allVertexBuffers.Clear();
_allIndexBuffers.Clear();
foreach (RenderData data in _clusterRenderData.Values)
{
ReadOnlyCollection <Model> models;
ReadOnlyCollection <VertexBuffer> vertexBuffers;
ReadOnlyCollection <IndexBuffer> indexBuffers;
data.GetData(out vertexBuffers, out indexBuffers, out models);
_allModels.AddRange(models);
_allVertexBuffers.AddRange(vertexBuffers);
_allIndexBuffers.AddRange(indexBuffers);
}
}