not able to get collision between 2 active objects

[mobichan]

Hello,

I have been attempting to use qualifier groups to handle bullet collision in a scrolling shooter. Even without qualifiers, it seems like I am not able to get any collision detection to work on my bullets and enemies.

I decided not to use the included "Shoot an Object" command for bullets because I wanted more control. So I used an active object with vector movement on it as my bullet. Any idea what might be happening? This is my first real attempt at making a game after doing a couple tutorials, so I might be misusing some things. ^_^'

I'm attaching my MMF2 file if anyone can take a look.

Thanks in advance,

Mobichan

MMF2 file here

[xerus]

Just from a quick glance, it looks like youre creating all the bats on layer 1, while your Knight guy is on Layer 2, along with the bullets. They cant collide if theyre on different layers.

[mobichan]

Yup. It was the layers. Thanks so much for the heads up xerus. Sorry if questions like these seems pretty dumb.

It seems like layers might just confuse things at this point. Is there a simple way of combining all layers and "flattening" them?

Thanks again,

Mobichan

[DavidN]

You can hit Ctrl+A to select everything in the Frame Editor, then drag all objects over to layer 1 on the Layers Toolbar and then remove the other now empty layers.

Don't worry about silly questions - they're nice because they're easy to answer

[Dines]

Something you may find useful also with layers:

Sometimes objects HAVE to be on separate layers. I had an example where I wanted the sun to create a glare on the screen. The sun had to disappear behind backdrops, so it needed a layer of its own (layer 1). But it also needed to detect if it was being blocked by a backdrop, so the glare would disappear (so it needed to do colision detections in Layer 2).

Simple answer was: Create a separate 'sun' object on Layer 2, and make it invisible. Make it always follow the 'Sun' on Layer 1, and voila!

So yeah, if you need an object to be on one layer, but it has to test for colisions on other layers, this is the best method I've found. Invisible detectors on the other layers, set to follow the 'master' object. It even works with paralax!


EDIT: I've not tried this yet, but I also have a feeling you can shift an object from one layer to another at runtime. I dunno how fast it is, but it's worth trying. You could shift it to your detection layer, test for any colisions, then shift it back to its original place again?