/// <summary>
/// Creates the instancing buffer
/// </summary>
private void CreateInstancingBuffers()
{
int instances = this.TotalInstances;
if (instances <= 0)
{
return;
}
this.instancingBufferOffset = vertexBuffers.Count;
this.instancingBufferBindingOffset = vertexBufferBindings.Count;
var instancingData = new VertexInstancingData[instances];
var buffer = CreateInstancingBuffer(this.game.Graphics, instancingData);
var binding = new VertexBufferBinding(buffer, instancingData[0].GetStride(), 0);
this.vertexBuffers.Add(buffer);
this.vertexBufferBindings.Add(binding);
foreach (var item in this.vertexData)
{
if (item.Instances > 0)
{
item.AddInstancingInputs(VertexInstancingData.Input(instancingBufferOffset));
}
}
}
/// <summary>
/// Reallocates the instance data
/// </summary>
private void ReallocateInstances()
{
int instances = this.TotalInstances;
if (instances <= 0)
{
return;
}
//Dipose current buffer
var instancingBuffer = this.vertexBuffers[this.vertexBuffers.Count - 1];
instancingBuffer.Dispose();
//Recreate the buffer and binding
var data = new VertexInstancingData[instances];
var buffer = CreateInstancingBuffer(game.Graphics, data);
var binding = new VertexBufferBinding(buffer, data[0].GetStride(), 0);
this.vertexBuffers[this.instancingBufferOffset] = buffer;
this.vertexBufferBindings[this.instancingBufferBindingOffset] = binding;
}