/// <summary>
/// Draw call
/// </summary>
/// <param name="context"></param>
/// <param name="instanceModel"></param>
protected virtual void OnDraw(DeviceContextProxy context, IElementsBufferModel instanceModel)
{
if (GeometryBuffer.IndexBuffer != null)
{
if (instanceModel == null || !instanceModel.HasElements)
{
context.DrawIndexed(GeometryBuffer.IndexBuffer.ElementCount, GeometryBuffer.IndexBuffer.Offset, 0);
}
else
{
context.DrawIndexedInstanced(GeometryBuffer.IndexBuffer.ElementCount, instanceModel.Buffer.ElementCount, GeometryBuffer.IndexBuffer.Offset, 0, instanceModel.Buffer.Offset);
}
}
else if (GeometryBuffer.VertexBuffer.Length > 0)
{
if (instanceModel == null || !instanceModel.HasElements)
{
context.Draw(GeometryBuffer.VertexBuffer[0].ElementCount, 0);
}
else
{
context.DrawInstanced(GeometryBuffer.VertexBuffer[0].ElementCount, instanceModel.Buffer.ElementCount,
0, instanceModel.Buffer.Offset);
}
}
}
public static void DrawIndexed(DeviceContextProxy context, IElementsBufferProxy indexBuffer, IElementsBufferModel instanceModel)
{
if (!instanceModel.HasElements)
{
context.DrawIndexed(indexBuffer.ElementCount, 0, 0);
}
else
{
context.DrawIndexedInstanced(indexBuffer.ElementCount, instanceModel.Buffer.ElementCount, 0, 0, 0);
}
}
public static void DrawIndexed(DeviceContextProxy context, int indexCount, int instanceCount)
{
if (instanceCount <= 0)
{
context.DrawIndexed(indexCount, 0, 0);
}
else
{
context.DrawIndexedInstanced(indexCount, instanceCount, 0, 0, 0);
}
}