Original Post
I''ve created a simple class, where I can store a texture for a sprite.
Every time the class calls Draw, eg if I want to draw a 2DObject, the data of the vertices will be stored into a single vertex buffer and only one call to drawprimative is needed.
Ex:
for (int i=0; i < 10; i++)
{
TheSpriteClass.Draw
}
TheSpriteClass.Display
the code will first draw to a single vertex buffer, 10 instance of the object, then display them.
But what about transistions matrices? like rotation and movement?
How should I implent that?
I want to use the D3DXMATRIX if I can.
Thanks for your time.
This is similar to what I am doing. For my game, I just have the sprites as quads (well, a single triangle, in my case 
) and have one of the axes have the same number for the vertices. For example, if x and y was horizontally across the screen and into it, while z was up, I might have all of my vertices use 0.0 as their Z coordinate. Then I just spin it about its axis with the appropriate rotation matrix function.