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AppGameKit Classic Chat / Physics question

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george++
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Posted: 4th Jul 2012 21:09
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Hi guys,
Because I have not experience in physics programming in general, I am in need for some guides on how to create a sprite that will serve as a soccer ball, looking at from top view, and will interact with four walls they will serve as bumping limits.
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Ancient Lady
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Posted: 4th Jul 2012 22:13
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Look at the SimpleBox2D example in Projects\Basic\Examples\Physics for a Tier 1 example that shows you some things you can do.

The Tier 2 example is 'Box2D - SimpleBox2D'.

My WIP uses physics very nicely. It's great to just set up some objects and get something moving and then not worry about the interactions (unless you want to). Things bounce about very nicely without any help.

Cheers,
Ancient Lady
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george++
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Posted: 4th Jul 2012 22:45
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Thank you Ancient Lady for your response. Before my question, I took a look in the physics examples, but all of these have the 'gravity' in consideration by default (I don't need gravity at all). I am sure that I will find my way but I asked just for saving time.
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baxslash
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Posted: 4th Jul 2012 23:08
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For top down games just set the gravity to zero using setPhysicsGravity(0,0) and give sprites some damping so they slow down over time using setSpritePhysicsDamping()


this.mess = abs(sin(times#))
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Ancient Lady
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Posted: 4th Jul 2012 23:38
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baxslash beat me to it!

Another command to use with SetSpritePhysicsDamping is SetSpritePhysicsRestitution. That one sets the bounciness.

Cheers,
Ancient Lady
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george++
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Posted: 5th Jul 2012 03:37
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thank you both of you
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baxslash
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Posted: 5th Jul 2012 13:37
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I would also set an angular damping value so your ball doesn't spin endlessly


this.mess = abs(sin(times#))
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Ancient Lady
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Posted: 5th Jul 2012 18:07
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Awww, isn't spinning good?

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Ancient Lady
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baxslash
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Posted: 5th Jul 2012 18:43
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Only after a few




this.mess = abs(sin(times#))
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