Collision Help

I've posted a similar topic like this in two other forums (Martin 2K and The Daily Click) , and I still haven't received a direct response to my problem. I'm wondering if Click Team Forums will be the first?!

I have a player (top down view) that can rotate 360 degrees. He will be able to shoot 360 degrees. I have four detectors placed around my player in the correct spots (X Top, Y Bottom, etc.) for each detector. When the player rotates, the detectors move around a little (this is good I think?). But when you collide with a wall, you can also rotate, causing the detectors to move as well. This can cause the detector to not overlap the wall, resulting in the player walking "through the wall". Here's an example .mfa file: (same .zip as the player bug problem, but it still shows the collision problem)

If your hotspot changes in the walking animation, that might be it, or if you're setting it to X Left, Y Bottom and so forth than its probably the animation size changing

And isn't it better to make a 'shadow' detector of size and shape of player which will be always under him and only compare positions instead of 4 detectors?

How would the shadow detector work? Because If I test for an overlap then the player will get stuck in the wall

If you make it properly it won't stuck there. For example use ball movement or change position.

okay i'll try that, but to me it sounds like it wont work. Does this only work with the 8 directional movement, because i'm just moving the sprite by coordinates.

It works for sure even with 32 ball movement when I use coordinates/values/movement.

okay. I know I'm doing something wrong because you guys say that it works >_<

I have a detector with the same sprite as my player underneath my player sprite that rotates just like the player. He still gets stuck in walls. I'm probably just interpreting what you guys are saying wrong. :crazy:

Here's my .mfa:

Man.. Only thing what you have to do is making opposite those collisions.

So if you've got pressing W isn't colliding with backdrop set Y to Y-7 add event pressing W is colliding with backdrop set Y to Y+7.

I just copied all 4 events negated them and made opposite values and it works perfectly. And it should work even without detector.

um, that example doesn't work. He still goes though walls @_@

you know what, I'm gonna take the noob way out and use 8 directions. It's actually pretty decent for collision and it works well with the 360 rotation. All I have to do is to send the players position when he's not colliding with a wall and he's holding the WASD keys.

Thanks anyway for your help guys. :D

I was testing only game frame because whole game like for me isn't working.

that's weird

Quote:

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Originally Posted by Sumo

and he's holding the WASD keys.

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Thank the Lord!

what? WASD keys are better than arrow keys when using the mouse in my opinion :P

I agree! I was more referring to the "send the players position when he's [..] holding the WASD keys", rather than just sending it constantly.

that would be "lag-city" if I did that XD

You'd be surprised how many people don't realise that!