public override void DrawInstancedPrimitives(int indexCount, int instanceCount, int startingIndex)
{
PreDrawCommand();
var elementsType = ((OpenGLIndexBuffer)IndexBuffer).ElementsType;
int indexSize = OpenGLFormats.GetIndexFormatSize(elementsType);
GL.DrawElementsInstanced(_primitiveType, indexCount, elementsType, new IntPtr(startingIndex * indexSize), instanceCount);
}
public override void DrawIndexedPrimitives(int count, int startingIndex, int startingVertex)
{
PreDrawCommand();
var elementsType = ((OpenGLIndexBuffer)IndexBuffer).ElementsType;
int indexSize = OpenGLFormats.GetIndexFormatSize(elementsType);
GL.DrawElementsBaseVertex(_primitiveType, count, elementsType, new IntPtr(startingIndex * indexSize), startingVertex);
}
