/// <summary>
/// Removes a display object from the batch.
/// </summary>
/// <param name="displayObject">Display object to remove.</param>
/// <param name="drawer">Instanced model drawer doing the removal.</param>
public unsafe void Remove(ModelDisplayObject displayObject, InstancedModelDrawer drawer)
{
//Copy the end of the list over the top of the part back (after the display object)
var vertexCopySource = displayObject.BatchInformation.BaseVertexBufferIndex + displayObject.BatchInformation.VertexCount;
var vertexCopyTarget = displayObject.BatchInformation.BaseVertexBufferIndex;
var vertexCopyLength = vertexCount - vertexCopySource;
Array.Copy(vertices, vertexCopySource, vertices, vertexCopyTarget, vertexCopyLength);
Array.Copy(instancedVertices, vertexCopySource, instancedVertices, vertexCopyTarget, vertexCopyLength);
vertexCount -= displayObject.BatchInformation.VertexCount;
//Copy the first part back (before the display object)
var indexCopySource = displayObject.BatchInformation.BaseIndexBufferIndex + displayObject.BatchInformation.IndexCount;
var indexCopyTarget = displayObject.BatchInformation.BaseIndexBufferIndex;
var indexCopyLength = indexCount - indexCopySource;
Array.Copy(indices, indexCopySource, indices, indexCopyTarget, indexCopyLength);
indexCount -= displayObject.BatchInformation.IndexCount;
//The index buffer's data is now wrong. We deleted a bunch of vertices.
//So go through the index buffer starting at the point of deletion and decrease the values appropriately.
for (int i = displayObject.BatchInformation.BaseIndexBufferIndex; i < indexCount; i++)
{
indices[i] -= (ushort)displayObject.BatchInformation.VertexCount;
}
//Like with the index buffer, go through the buffer starting at the point of deletion and decrease the instance index values.
for (int i = displayObject.BatchInformation.BaseVertexBufferIndex; i < vertexCount; i++)
{
instancedVertices[i].InstanceIndex--;
}
displayObjects.Remove(displayObject);
//Move the subsequent display objects list indices and base vertices/indices.
for (int i = displayObject.BatchInformation.BatchListIndex; i < DisplayObjects.Count; i++)
{
DisplayObjects[i].BatchInformation.BatchListIndex--;
DisplayObjects[i].BatchInformation.BaseVertexBufferIndex -= displayObject.BatchInformation.VertexCount;
DisplayObjects[i].BatchInformation.BaseIndexBufferIndex -= displayObject.BatchInformation.IndexCount;
}
// Tell ModelDisplayObject that it got removed (batch, indices).
var batchListIndex = displayObject.BatchInformation.BatchListIndex;
displayObject.ClearBatchReferences();
if (displayObjects.Count > 0 && batchListIndex < displayObjects.Count)
{
vertexBuffer.SetData(sizeof(VertexPositionNormalTexture) * vertexCopyTarget, vertices, vertexCopyTarget, vertexCopyLength, sizeof(VertexPositionNormalTexture));
instancedBuffer.SetData(sizeof(InstancedVertex) * vertexCopyTarget, instancedVertices, vertexCopyTarget, vertexCopyLength, sizeof(InstancedVertex));
indexBuffer.SetData(sizeof(ushort) * indexCopyTarget, indices, indexCopyTarget, indexCopyLength);
}
}
/// <summary>
/// Removes a display object from the batch.
/// </summary>
/// <param name="displayObject">Display object to remove.</param>
/// <param name="drawer">Instanced model drawer doing the removal.</param>
public void Remove(ModelDisplayObject displayObject, InstancedModelDrawer drawer)
{
//Modify vertex buffer
var newVertices = new VertexPositionNormalTexture[vertices.Length - displayObject.BatchInformation.VertexCount];
//Copy the first part back (before the display object)
Array.Copy(vertices, 0, newVertices, 0, displayObject.BatchInformation.BaseVertexBufferIndex);
//Copy the second part back (after the display object)
Array.Copy(vertices, displayObject.BatchInformation.BaseVertexBufferIndex + displayObject.BatchInformation.VertexCount,
newVertices, displayObject.BatchInformation.BaseVertexBufferIndex,
vertices.Length - (displayObject.BatchInformation.BaseVertexBufferIndex + displayObject.BatchInformation.VertexCount));
vertices = newVertices;
//Modify index buffer
var newIndices = new ushort[indices.Length - displayObject.BatchInformation.IndexCount];
//Copy the first part back (before the display object)
Array.Copy(indices, 0, newIndices, 0, displayObject.BatchInformation.BaseIndexBufferIndex);
//Copy the second part back (after the display object)
Array.Copy(indices, displayObject.BatchInformation.BaseIndexBufferIndex + displayObject.BatchInformation.IndexCount,
newIndices, displayObject.BatchInformation.BaseIndexBufferIndex,
indices.Length - (displayObject.BatchInformation.BaseIndexBufferIndex + displayObject.BatchInformation.IndexCount));
indices = newIndices;
//The index buffer's data is now wrong though. We deleted a bunch of vertices.
//So go through the index buffer starting at the point of deletion and decrease the values appropriately.
for (int i = displayObject.BatchInformation.BaseIndexBufferIndex; i < indices.Length; i++)
indices[i] -= (ushort)displayObject.BatchInformation.VertexCount;
//Modify instancing indices
var newInstancedVertices = new InstancedVertex[instancedVertices.Length - displayObject.BatchInformation.VertexCount];
//Copy the first part back (before the display object)
Array.Copy(instancedVertices, 0, newInstancedVertices, 0, displayObject.BatchInformation.BaseVertexBufferIndex);
//Copy the second part back (after the display object)
Array.Copy(instancedVertices, displayObject.BatchInformation.BaseVertexBufferIndex + displayObject.BatchInformation.VertexCount,
newInstancedVertices, displayObject.BatchInformation.BaseVertexBufferIndex,
instancedVertices.Length - (displayObject.BatchInformation.BaseVertexBufferIndex + displayObject.BatchInformation.VertexCount));
instancedVertices = newInstancedVertices;
//Like with the index buffer, go through the buffer starting at the point of deletion and decrease the values appropriately.
for (int i = displayObject.BatchInformation.BaseVertexBufferIndex; i < instancedVertices.Length; i++)
instancedVertices[i].InstanceIndex--;
displayObjects.Remove(displayObject);
//Move the subsequent display objects list indices and base vertices/indices.
for (int i = displayObject.BatchInformation.BatchListIndex; i < DisplayObjects.Count; i++)
{
DisplayObjects[i].BatchInformation.BatchListIndex--;
DisplayObjects[i].BatchInformation.BaseVertexBufferIndex -= displayObject.BatchInformation.VertexCount;
DisplayObjects[i].BatchInformation.BaseIndexBufferIndex -= displayObject.BatchInformation.IndexCount;
}
// Tell ModelDisplayObject that it got removed (batch, indices).
displayObject.ClearBatchReferences();
//If there weren't any vertices, this batch is about to die.
if (displayObjects.Count > 0)
{
vertexBuffer = new VertexBuffer(graphicsDevice, VertexPositionNormalTexture.VertexDeclaration, vertices.Length, BufferUsage.WriteOnly);
vertexBuffer.SetData(vertices);
instancingBuffer = new VertexBuffer(graphicsDevice, InstancedVertex.VertexDeclaration, instancedVertices.Length, BufferUsage.WriteOnly);
instancingBuffer.SetData(instancedVertices);
indexBuffer = new IndexBuffer(graphicsDevice, IndexElementSize.SixteenBits, indices.Length, BufferUsage.WriteOnly);
indexBuffer.SetData(indices);
bindings = new VertexBufferBinding[] { vertexBuffer, instancingBuffer };
}
}
/// <summary>
/// Removes a display object from the batch.
/// </summary>
/// <param name="displayObject">Display object to remove.</param>
/// <param name="drawer">Instanced model drawer doing the removal.</param>
public void Remove(ModelDisplayObject displayObject, InstancedModelDrawer drawer)
{
//Modify vertex buffer
var newVertices = new VertexPositionNormalTexture[vertices.Length - displayObject.BatchInformation.VertexCount];
//Copy the first part back (before the display object)
Array.Copy(vertices, 0, newVertices, 0, displayObject.BatchInformation.BaseVertexBufferIndex);
//Copy the second part back (after the display object)
Array.Copy(vertices, displayObject.BatchInformation.BaseVertexBufferIndex + displayObject.BatchInformation.VertexCount,
newVertices, displayObject.BatchInformation.BaseVertexBufferIndex,
vertices.Length - (displayObject.BatchInformation.BaseVertexBufferIndex + displayObject.BatchInformation.VertexCount));
vertices = newVertices;
//Modify index buffer
var newIndices = new ushort[indices.Length - displayObject.BatchInformation.IndexCount];
//Copy the first part back (before the display object)
Array.Copy(indices, 0, newIndices, 0, displayObject.BatchInformation.BaseIndexBufferIndex);
//Copy the second part back (after the display object)
Array.Copy(indices, displayObject.BatchInformation.BaseIndexBufferIndex + displayObject.BatchInformation.IndexCount,
newIndices, displayObject.BatchInformation.BaseIndexBufferIndex,
indices.Length - (displayObject.BatchInformation.BaseIndexBufferIndex + displayObject.BatchInformation.IndexCount));
indices = newIndices;
//The index buffer's data is now wrong though. We deleted a bunch of vertices.
//So go through the index buffer starting at the point of deletion and decrease the values appropriately.
for (int i = displayObject.BatchInformation.BaseIndexBufferIndex; i < indices.Length; i++)
{
indices[i] -= (ushort)displayObject.BatchInformation.VertexCount;
}
//Modify instancing indices
var newInstancedVertices = new InstancedVertex[instancedVertices.Length - displayObject.BatchInformation.VertexCount];
//Copy the first part back (before the display object)
Array.Copy(instancedVertices, 0, newInstancedVertices, 0, displayObject.BatchInformation.BaseVertexBufferIndex);
//Copy the second part back (after the display object)
Array.Copy(instancedVertices, displayObject.BatchInformation.BaseVertexBufferIndex + displayObject.BatchInformation.VertexCount,
newInstancedVertices, displayObject.BatchInformation.BaseVertexBufferIndex,
instancedVertices.Length - (displayObject.BatchInformation.BaseVertexBufferIndex + displayObject.BatchInformation.VertexCount));
instancedVertices = newInstancedVertices;
//Like with the index buffer, go through the buffer starting at the point of deletion and decrease the values appropriately.
for (int i = displayObject.BatchInformation.BaseVertexBufferIndex; i < instancedVertices.Length; i++)
{
instancedVertices[i].InstanceIndex--;
}
displayObjects.Remove(displayObject);
//Move the subsequent display objects list indices and base vertices/indices.
for (int i = displayObject.BatchInformation.BatchListIndex; i < DisplayObjects.Count; i++)
{
DisplayObjects[i].BatchInformation.BatchListIndex--;
DisplayObjects[i].BatchInformation.BaseVertexBufferIndex -= displayObject.BatchInformation.VertexCount;
DisplayObjects[i].BatchInformation.BaseIndexBufferIndex -= displayObject.BatchInformation.IndexCount;
}
// Tell ModelDisplayObject that it got removed (batch, indices).
displayObject.ClearBatchReferences();
//If there weren't any vertices, this batch is about to die.
if (displayObjects.Count > 0)
{
vertexBuffer = new VertexBuffer(graphicsDevice, VertexPositionNormalTexture.VertexDeclaration, vertices.Length, BufferUsage.WriteOnly);
vertexBuffer.SetData(vertices);
instancingBuffer = new VertexBuffer(graphicsDevice, InstancedVertex.VertexDeclaration, instancedVertices.Length, BufferUsage.WriteOnly);
instancingBuffer.SetData(instancedVertices);
indexBuffer = new IndexBuffer(graphicsDevice, IndexElementSize.SixteenBits, indices.Length, BufferUsage.WriteOnly);
indexBuffer.SetData(indices);
bindings = new VertexBufferBinding[] { vertexBuffer, instancingBuffer };
}
}
