Wall or surface movement

[AndyCapple123]

I'm attempting to create an enemy in my game that can move (or probably crawl) along a wall. What I'm getting at is something like the Zoomers from the Metroid games...the spiky enemies that can scale walls and crawl over ceilings. Does anyone know any ways this can possibly be accomplished?

[nivram]

Place detectors on all four sides as sensors. When an enemy overlaps a wall change the direction.

Marv

[AndyCapple123]

That would work if the room was a box with nothing but 4 perpendicular walls, but in some rooms, the enemy has to get around ledges and extruding tiles.

[RickyRombo]

who said the detectors had to be lines? and who said they couldn't rotate a little

Be creative and use some circular movement or something.

[Acord]

This is actually a very complicated question. First, you'll need grid based movement, like you'd see in an old school RPG. THEN you can worry about collision detection and so-forth.

[LB]

That would work if the room was a box with nothing but 4 perpendicular walls, but in some rooms, the enemy has to get around ledges and extruding tiles.

You can negate the conditions that check for overlap

[Acord]

Huh. It's hard to believe nobody has written a grid based movement object yet.

[LB]

1. There are several grid-based movement extensions
2. Nivram wrote a fastloop grid movement widget
3. Grid movement is simpler than most movements anyway
4. Does this satisfy you?

[nivram]

Acord, on my website look at the "fastloopgridmovement2" example.

Marv

[AndyCapple123]

I guess I can try grid movement. I wouldn't have thought of that since I usually gravitate towards the collision detection route immediately.