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My problem with multiple collision detection (Java)


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  #1  
Old April 18th, 2007, 08:56 AM
william_nagels william_nagels is offline
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My problem with multiple collision detection (Java)
Hello,

i don't know how to explain my problem so i've called it:
"my problem with multiple collision detection".

The idea:
you are a guy/girl and need kill all evil aliens.

But the problem is how i know when that guy / girl shoots an alien.
so with other words how do i know when there is a collision between a bullet and an alien.Let's say that there are 50 aliens
and you have unlimited bullets.
When you make a game like pong it's easy because you only have 3 objects.
Do i need to write this like 70000000000 times?
Code:
bullet[0].intersects(evilAlienNR1);

I hope not

Help me java-game-programmers you guys are my only hope

William
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  #2  
Old April 18th, 2007, 12:52 PM
crownjewel82 crownjewel82 is offline
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This is why we use lists of all objects in games.
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  #3  
Old April 18th, 2007, 01:14 PM
william_nagels william_nagels is offline
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Can I ask you how i'm supposed to do that
ArrayList?
Code:
ArrayList alList1 = new ArrayList();

or some kind of ingenious class.
Code:
class bullet{}

Code:
class alien{}

someone help me *puppy face*

William
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  #4  
Old April 18th, 2007, 03:34 PM
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should I move this to Java forum?
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  #5  
Old April 19th, 2007, 10:09 AM
william_nagels william_nagels is offline
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sure no problem
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  #6  
Old April 19th, 2007, 10:13 AM
crownjewel82 crownjewel82 is offline
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Ok. Your aliens. Do you have 50 different instances of alien or do you have them in an array or a list? If they're in a list (or array) then you can loop through them for each bullet using a nested loop.

Collections
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  #7  
Old April 19th, 2007, 10:28 AM
william_nagels william_nagels is offline
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k thanks going to tryout the collections idea

William
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  #8  
Old April 19th, 2007, 12:46 PM
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Is this for a project? If not, I would try something like GTGE.
It has built in collision detection =D

EDIT: w00t, 300th post =D
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william_nagels agrees: thanks man
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  #9  
Old April 19th, 2007, 01:05 PM
william_nagels william_nagels is offline
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thanks man

William
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