Sorry your browser is not supported!

I have a tiled background generated using the paste image command. When I then use sprite command the tile background disappears and leaves just a blue screen and my sprite. Why is this and how do I avoid it?

Thanks in advance.

Sounds to me like you need to redraw the background before you update any of the sprites. I've not delved into the sprite side of things in DBPro but my 2d programming on the Atari required redrawing the back screen and sprites to a buffer then redrawing on the main screen.

Colonel_Klink is right. You have to redraw the tile map every time you use a sprite. Sprites are treated like 3D plains so the blue screen will always be seen if you don't update the background too.

Here's an example:

If you want the sprites to stay where they are, then you need to increment them, like use a global variable to track the current sprite number, and sprite them on, just like with a PASTE IMAGE.

Remember though that there is also the PASTE SPRITE command. But...

Really you'd be better off with another technique for handling your tiled backdrop. For instance, a matrix where each tile is set from a tile sheet, you'd just need to make the right size matrix, set the matrix tiles to suit your map, then it'll be a 3D backdrop, and sprites will sit on top of it, paste image etc would sit on top as well but underneath the sprites. One benefit in this is that you can avoid resizing issues - like if you use PASTE IMAGE or even PASTE SPRITE, you are most likely restricted to 1 single screen resolution. With the matrix backdrop you can zoom in and out and rotate and everything - all just by changing the camera position and rotation.

One other consideration would be to make 1 big sprite, and draw the tiles onto a bitmap, grab the bitmap, then that's your sprites texture. You can actually make a backdrop that is bigger than the screen, then by specifying the sprites UV coordinates, scroll the screen. Might be a bit fiddly - but just consider what faster methods are available to replace PASTE IMAGE. Personally I would avoid redrawing the tiles each loop, and I'd avoid having all those sprites on screen at once, so I'd probably go for a matrix - perhaps switching to a memblock matrix eventually for a bit of a speed boost.