Destructible terrain on iOS

[Triclyde]

Hello, I'm trying to make a "Worms" style game for the iphone with destructible terrain. Normally I would use the surface object but it doesn't look like iOS supports that yet. I then tried doing it another way, I have a quick back drop set as an obstacle and when a bomb explodes it creates an active object which is just a circle with the same color as the background ( making it look as if a hole got cut out of the quick back drop). I then have it so that the active object pastes into the background as not an obstacle and then destroy the active object. This actually works perfectly, when that non-obstacle circle is pasted into the background not only do you see the hole, but the character you control ( Using Platform Movement Object for character) is even able to go into the hole as if the quick back drop actually got a piece of it destroyed.

The problem that I'm having is this only seems to work when running on the PC. When I run it on my iphone or even the iphone simulator the character doesn't go in the hole. The hole is still visible, But it still seems to be solid since the character can't pass through it. Is there any other way I can make this work? thanks!

[DistantJ]

I imagine this is to do with the different style of collision detection for iOS (with the old style of collision detection games slowed down too much), so I can't imagine this being fixed if I'm honest. All I can think is to have destructible blocks but obviously this isn't as versatile.

[AyreGuitar]

I too was disappointed to find this method didn't work in iOS but did in PC when I tried it a few releases ago (although I haven't tried it again recently). Seems odd that the collision mask can be added to but not subtracted from. Perhaps someone from Clickteam can elaborate as to the reason?

[Francois]

There is no difference between the collision mask on iOS and on PC. In Flash on the other side, this would never work, as there is no collision mask, but objects.
Can you send us a demo should the problem (with the minimum number of objects and events)?

[Triclyde]

Ok here's the example Thanks

[Tuna]

that's pretty cool, i didn't think this could be done so easily!

[iamjot]

Hmm yes thats nice. And pretty simple & clever. This could make a couple of fun ios games! Thx!

EDIT:

it seems NOT to work on the iphone. its a good a simple idea, but something with the backdrop collision seems to be more tricky i guess. the "character" just steps over the newly created hole in the floor (the black backdrop).

[Triclyde]

I just wonder why this doesn't work on iOS. Is this something that could be fixed in the next beta of the exporter?

[iamjot]

I hope so too because I really!!! like the simplicity (ui, i hope thats the right word) of your example Triclyde! We could use it for making a simple lemmings game - and i would LOVE to see a mmf2 version of a lemmings game on the iphone! So all in all: thx for the idea. I´m sure we´ll find a way around it!

[DistantJ]

it seems NOT to work on the iphone

That was the point in this thread :P

I'm surprised you guys hadn't done this before, it's a cool little way of doing worms-style stuff, though obviously your backgrounds have to be VERY simple!