/// <summary>
/// Adds a display object to the batch.
/// </summary>
/// <param name="displayObject">Display object to add.</param>
/// <param name="drawer">Drawer of the batch.</param>
public bool Add(ModelDisplayObject displayObject, InstancedModelDrawer drawer)
{
//In theory, don't need to test for dupliate entries since batch.Add
//should only be called through a InstancedModelDrawer's add (which checks beforehand).
if (displayObjects.Count == MaximumObjectsPerBatch ||
((indices.Length / 3 + displayObject.GetTriangleCountEstimate()) > MaximumPrimitiveCountPerBatch &&
displayObjects.Count > 0))
{
return(false);
}
displayObjects.Add(displayObject);
int instanceIndex = displayObjects.Count - 1;
var textureIndex = displayObject.TextureIndex;
displayObject.GetVertexData(vertexList, indexList, this, (ushort)vertices.Length, indices.Length, instanceIndex);
//Add the data to the batch.
var newVertices = new VertexPositionNormalTexture[vertices.Length + vertexList.Count];
vertices.CopyTo(newVertices, 0);
vertexList.CopyTo(newVertices, vertices.Length);
vertices = newVertices;
var newIndices = new ushort[indices.Length + indexList.Count];
indices.CopyTo(newIndices, 0);
indexList.CopyTo(newIndices, indices.Length);
indices = newIndices;
var newInstancingVertices = new InstancedVertex[instancedVertices.Length + vertexList.Count];
instancedVertices.CopyTo(newInstancingVertices, 0);
for (int i = instancedVertices.Length; i < newInstancingVertices.Length; i++)
{
newInstancingVertices[i] = new InstancedVertex {
InstanceIndex = instanceIndex, TextureIndex = textureIndex
}
}
;
instancedVertices = newInstancingVertices;
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);
bindings = new VertexBufferBinding[] { vertexBuffer, instancingBuffer };
indexBuffer = new IndexBuffer(graphicsDevice, IndexElementSize.SixteenBits, indices.Length, BufferUsage.WriteOnly);
indexBuffer.SetData(indices);
vertexList.Clear();
indexList.Clear();
return(true);
}
