Hi all, I am developing a tile based application. In worst case each tile may use diferent textures. I am using point sprites to show tile (using texture). I have to show about 1000 x 800 tiles in a frame. I would use tiles of size 4 x 4. Now i am doing a scrollable window in DirectX using DXUT. I am trying to show tiled pattern inside this scrollable window. it scrolls in all directions. For giving a feel of scrolling i am redrawing the pattern using the vertex buffer information we have. It will have scrollable areas more than 60,000 x 10,000. ie. we cannot pre-render the entire scrollable area and then blit the viewable area to the screen. I tried by copying the content of offscreen surface (already rendered portion of scrollable area ) to backbuffer and the presenting it. Still i am not getting the smooth scrolling. When i profiled, it seems device.Present() function is the bottleneck. I am using a dynamic vertex buffer since the vertex information we have to keep is huge. How to achieve a smooth scrolling, considering i will have to show huge scrollable area? How can i implement double buffering? Expecting Reply Bachu

Thanks for the reply,

Now i am drawing the tiles which are visible in the view port. The number tiles to be shown in a frame is about 1000 x 800. The data to be shown next is calculated dynamically. Smoother scrolling is not happening even we have the surface already drawn and copying it to back buffer dynamically.

I am not using any extra buffer. I am working with DXUT.

bachu