Pathfinding
Blitz3D Forums/Blitz3D Programming/Pathfinding
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| I need help with pathfinding in 2D and 3D the first help i need with pathfinding is for a pacman like game heres an example Function UpdateGhost(G.ghost) Select G\state case STATE_ALIVE G\xv = PathFindXV(G) ; I need help writing these G\yv = PathFindYV(G) ; 2 Functions G\x = G\x + G\xv G\y = G\y + G\yv Case STATE_BLUE ;Ghosts turn blue and edible G\xv = PathFindEscapeXV(G) ; And i need help with these G\yv = PathFindEscapeYV(G) ; two functions G\x = G\x + G\xv G\y = G\y + G\yv Case STATE_DEAD KillGhost(G) End Select End Function ;==================================================== Ok So for this code above I need help writing the PathFindXV and PathFindYV functions, which are supposed to tell the ghost which direction to go based on where pacman is in the game. And for a 3D Game i would just like a short sample on how you would have a Ball and a wall just like this: |||X O | | | | And the ball is told to move to point X like this: Function OrderObjMove(SomeEntity,x,z) Repeat ;Repeat moving the entity toward point X, avoiding collision ;with the wall by moving around it Until (EntityX(SomeEntity) = X and EntityZ(SomeEntity) = Z) End Function How would I go about making the ball swerve around any collisions it would come upon? I know this is long but thanks for any help. |
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| I suspect you might be asking a bit more than you realise. However, most of your needs can be met via a system that allows ghosts to move to any designated* tile - be it the one Pac-Man occupies or their "home corner" (for scattering). Personally I would ping the map: Consider a fresh "ping map" of the play tiles with all entries set to zero. Now you set the target tile to a value of one, and each pass you increment the ping value of each free adjacent tile to the ones you just filled in. Eventually you end up with a completed ping value map upon which you can trace back to the target tile from any other tile simply by looking for an adjacent entry with a lower ping value than the one you are currently on. "Home Corner" ping maps can be pre-calculated for each ghost, obviously, and the realtime one (for tracking Pac-Man) shared between all ghosts and built up over several loops to keep the speed up. A ghost that can actually see the player doesn't even need to refer to the ping map, naturally. That would be my approach, anyway. *How exactly you designate a tile would depend on the personality of the ghost in question. |
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| I rather have an introduction tutorial to pathfinding than the link you sent sledge. Something thats more of an open system |
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| Try this, then. Followed by this. EDIT: Oh, the images are borked in that archive. Alternatively: Part 1 Part 2 |
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