Funnily enough, in the example code I linked in my reply, that's pretty much exactly what I did.
Although instead of "shadowing" the underlying tile, I just had a duplicate image of the tile but with a yellow border, so once the coordinates were worked out, I'd just blit the yellow-bordered tile onto the rect, and (I think, I haven't touched the code in a while) destroyed it when the cursor left the currently "selected" rect. If you progress with this isometric stuff, and get around any of the following issues, I'd love to hear how you got around them: 1) I had a mechanism that allowed you to "pick up" the entire iso grid and move it around on screen. Whilst this worked fine without any actors on the grid, when I did eventually populate the area with them, picking the grid and moving it around caused the actors to *almost* stick to their original locations, but eventually they would "forget" the constraints of the grid and start rolling off it, etc. 2) Sort of associated with above. I wanted to have an effect that moving the grid in any direction would cause the background image to move proportionally slower in the same direction of the grid movement (to give more pseudo-parallax effect). I got it working, but encountered problems with the fact that the grid would never escape the bounds of the camera, but the background image *would* escape the bounds and would start gradually edging out of the camera, leaving nasty trails. I was using an image that was approximately double the size and width of the grid (and had its center underneath the center of the grid) to give me plenty of "play", but I just couldn't keep the background from escaping. 3) If you *do* have actors strolling across the grid in their correct isometric directions, I found a problem with the fact that an actor placed before (or was it after?) another actor, but further "North" would mean if the two actors crossed paths at some point, the actor placed further north would blit *through* the actor to the south, whereas it should really blit *behind*. Like I said in my original reply, my code will probably give you a good idea how not to do things, but I left a few ideas in there that would certainly spark your imagination, and possibly have enough information about how I solved *some* problems to keep you going :) Good luck! -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Kris Schnee Sent: Wednesday, June 14, 2006 18:16 To: pygame-users@seul.org Subject: [pygame] Isometric Math I see the responses, and will get to them tonight -- short on time. I had an idea, though, on "picking": how about creating a hidden graphics layer where the top of each iso-tile is "shadowed" with a unique color representing its coords? (eg. tile (4,2) gets color (0,4,2).) Then when the user clicks on the landscape, you can just get_pixel to find the tile # that was clicked on! Kris CONFIDENTIAL NOTICE: This email including any attachments, contains confidential information belonging to the sender. It may also be privileged or otherwise protected by work product immunity or other legal rules. This information is intended only for the use of the individual or entity named above. If you are not the intended recipient, you are hereby notified that any disclosure, copying, distribution or the taking of any action in reliance on the contents of this emailed information is strictly prohibited. If you have received this email in error, please immediately notify us by reply email of the error and then delete this email immediately.
