Hello, I have a fairly frustrating problem I am trying to solve. It's pretty complicated to explain, so I'll do my best.
I am trying to use the depth effect of StarPusher ( http://inventwithpython.com/blog/2011/06/13/new-game-source-code-star-pusher-sokoban-clone/) to make my own game. I'm not using their code exactly, just the method of blitting images in a grid, where the images are taller than the grid to create depth. However, I wish to use large maps (60x60 tiles) which means that iterating over the entire dict of tiles each frame takes a long time to blit. Of course, I could only redraw the map when I need to, but this means that I couldn't have units of tiles animated as I'd have to draw the whole map each frame of animation (which is SLOW). I'd like to be able to simply pick a tile from the dict and call a render method on it, and it only blit that tile (or nesc. area). The problems come when trying to render just a single tile due to a unit moving onto it (or appearing and disappearing in my case). One solution may just be to blit the entire column if anything in that column has changed, but if I have a unit in every column animating, I may as well just redraw the entire map each frame, which takes AGES. At the moment I'm trying: Draw the originally rendered map with unit onto the tile and the tile below Draw the unit onto the tile Draw any unit onto the tile below However, this doesn't work as the first tile's head gets left behind. If I then extend the first erase to cover the head, I lose the feet of any unit standing in the tile above! I know all this sounds a bit weird, but its very hard to explain without seeing it in action. The code is fairly big (about 5 files of python, 500 lines max) of unfinished code. It can be downloaded from here; https://dl.dropboxusercontent.com/u/8301679/BlttingIssue.zip I hope I've vaguely explained it - maybe its simply not possible trying to do what i'm trying to do - but some advise would be hugely welcome! Cheers, Andy
