DrawPrimitiveUP

DrawPrimitiveUP renders primitives based on the data that the array that you pass to the function contains .
DrawPrimitive Will use the data from the current stream to render primitives . You can create a "hardware accelerated" cursor using 2 transparent triangles that form a Quad .

DrawPrimitiveUP uses an internal vertex buffer to store your input array data, i.e. It copies your vertices into a vertex buffer and uses that for rendering. It''s generally slower than DrawPrimitive, and it''s only used for testing and simplistic stuff.

Cheers,
Muhammad Haggag

Thanks!