Collision Mask?

[Looki]

Hi, just wanted to ask if it's possible to create a collision for an active / backrop mask via picture (black = no coll. ; white = coll.)
In my map editor there's a built-in tile editor, it works fine, but collision mask would be so nice, e.g. if you have a tile with bumpy suface, you would walk up and down a few pixels.

I had the idea to create to actives/backdrops, one with collision, one without. I think that's the only way possible. Maybe that's possible to rule with Overlay, but I don't know how!

Thanks for each answer.

[DavidN]

The Overlay was intended for things like this, so you can detect when your player is over certain types of 'zones' - though I'm not sure how to use it, or how to translate your map layout directly into the mask.

[Looki]

I'm not sure either, and I don't think I want it that way.
Well, what's about this idea (I think it's pretty slow):

You load the tile graphic into an overlay.
You load the tile coll. mask into another overlay.

with 2 loops, you compare the pixel colors of the collisionmask-overlay.

if black at XY > write current color of graphic-overly (XY) into another overlay. ("no collision")
if white at XY > write current color of graphic-overly (XY) into another overlay. ("collision")

You save both overlays.
You load both pictures in two different actives (Load Frame..).
You add a backdrop of both actives, but only the one with the "collision" picture is an obstacle.

[stuckboy]

No there is nothing like this currently in MMF2. It would be possible to create a system that does what you said above using MMF2 events, but it would be so slow it would be unusable.

If you want to make a collision mask for an object, you need to make a separate object, make it invisible, then always position your graphical sprite relative to it. It isn't the easiest system to use in the world, especially when it comes to linking multiple instances of your graphical sprite and collision object.

[Anders]

Don't forget animations

[Looki]

Ok, thanks.
@Andos: Well, you're right, but I didn't want to implement animated tiles - fortunately.

[Pkeod]

Vector based collision masks in MMF would be nice..

[maVado]

My Game uses a desert scenario, so you come accross dunes and grass and other minor abstacles. Since the time is limited on those "maps" I want the player to penalize if he moves over those objects be decreasing speed.

My Tiles are 32x32, and I created an Array based on a 4x4 Tileset.

When the Player moves I compare the current X Y to the Array and penalize his speed according to the value.

So on a Sand Tile its like

0,0,0,0,0,0,0,0
0,0,0,0,0,0,0,0
0,0,0,0,0,0,0,0
0,0,0,0,0,0,0,0
0,0,0,0,0,0,0,0
0,0,0,0,0,0,0,0
0,0,0,0,0,0,0,0
0,0,0,0,0,0,0,0

on a Dune tiles it looks like this:

0,0,0,0,0,0,0,1
0,0,0,0,0,1,1,0
0,1,0,0,1,2,1,0
0,1,1,2,3,2,0,0
0,0,2,3,3,2,1,0
0,1,2,2,2,1,0,0
0,2,1,1,0,0,0,0
1,0,0,0,0,0,0,0

0 = speed * 1
1 = speed * 0.75
2 = speed * 0.60
3 = speed * 0.40

Also when hit a 2 and 3 value field the character bumps 1 and 2 pixels up.

So far I see no speed issues at all with this.

I can disable it at runtime any time and see no difference.