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Chipmunk Physics • View topic - n00b question on shapes

n00b question on shapes

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n00b question on shapes

Postby raden_muaz » Sat Nov 01, 2008 10:04 am

Hi there. I'm quite noob to Chipmunk.

In chipmunk, we can create joints and connect to bodies.
However, in my tank game, I want to attach the tank's track below the tank's base, without the tank's base swinging or sliding.
I tried to attach 2 joints to try making the tank's base static, but I've absolutely no idea - the base still swinging around but this time it remains horizontal. :|
Is there some other way to make joints static to solve this problem? Or any other solutions?
Last edited by raden_muaz on Sun Nov 02, 2008 2:04 am, edited 1 time in total.
raden_muaz
 
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Re: n00b question: How to create 'static' joint?

Postby maximile » Sat Nov 01, 2008 8:17 pm

You can add the two shapes to the same body. You don't need joints at all.
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Re: n00b question: How to create 'static' joint?

Postby raden_muaz » Sat Nov 01, 2008 8:47 pm

Thanks.
But now I have trouble arranging pm.Poly (polygon shape) onto the body
Does pymunk shapes starts the coordinates from down below or the center?

Right now I create:
1. the tank's base's shape, pm.Poly, sized zero - Vec2d(0,0),
2. the tank's track's shape, pm.Poly, size of the whole sprite

So even the tank is upside-down, the tank will still move as the surface velocity of the track is the whole sprite...

The tank sprite's size is 20x16



I would like to attach shapes proportionally to its size according to this sprite
The tank's track would be at the bottom to 9th pixel (0-9);
While The tank's base would be at 9 pixels from below to the top; (9-16)

Pleas help. :(
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Re: n00b question on shapes

Postby viblo » Sun Nov 02, 2008 6:57 am

http://www.pymunk.org - A python library built on top of Chipmunk to let you easily get cool 2d physics in your python game/app
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Re: n00b question on shapes

Postby raden_muaz » Mon Nov 03, 2008 5:13 am

thanks
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