On Fri, 7 Nov 2008 21:06:30 +0000 Kris Schnee <[EMAIL PROTECTED]> wrote:
> That's a common problem. You're talking about situations like the hero > standing on grass (which should be drawn before him) and behind a tree > (which should be drawn after him), right? > > One solution is to make a new layer of tiles that's drawn in a second > pass. Another is to mess with the game's perspective so that this > never happens, eg. you can never walk behind a wall. There are a > couple of possible ways to store a second-layer set of data; either > use a second list of what tile goes where (where most will say > "nothing"), or a list specifying only the spots where there is > something (eg. "tree at 42,0"). With the second method you could > treat the in-front-of-player objects as being like sprites in that > they're large things drawn separately from the tiles. > Ok, I'm attempting for the first solution. I tried blitting a copy of the background surface containing all foreground tiles to the screen after the player was blitted, but that resulted in a non-alpha surface (all i see is the foreground tiles...everything else is black). Then I tried the same thing with a subsurface of the background with the same rect area. The result was a perfect foreground and background, but no player...so still, no alpha to the surface or something. I tried set_alpha() but I'm guessing that sets the per-pixel alpha as this just made it completely invisible. How can I blit 2 surfaces of the same size to a screen and see through the holes to the bottom surface?
