Share your projects and Chipmunk enhancements.

Re: Sketches

Postby fidaner » Thu Jan 15, 2009 6:01 am

I played your demo. Great work. But I think it would be better if you would not punish the player for drawing on ground, and just create an object nearby, just like in Crayon Physics.
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Joined: Thu Jan 15, 2009 5:57 am

Re: Sketches

Postby raposon » Tue Feb 17, 2009 7:31 am

I'm having a hard time using this library...

Here is a list of the issues I'm having:

1. Shapes penetrate (and sometimes pass by) each other
2. Joints and shapes show a continuous small shaking even when there are no forces applied to it.
3. Shapes stick on walls made of a static shape.

Here is one scenario:

A simple static Box with boxes falling to the floor.
If the box is heavy, it passes by the floor.
When the boxes are pilled up, they keep shaking (a little, but they do).

I've made a chain using slide joints and hung it to a static body in the middle of the screen.
It keeps shaking up and down.

I'v tried adjusting cp_collision_slop, cp_bias_coef, space->iterations, space->elasticIterations = 3, cpSpaceStep.
With no success.
Even if I make my chain is made of blocks weighting 0.001.

Also, smg posted a solution for making ropes that I could not understand.
Do you know what he is talking about when he says:

"The ropes simply are made by using spheres and linking them with a pivot joint. I got the idea for them from the joint demonstration. The number of circles used for every body is variable, but i figured out that using just one sphere per body gets computationally intense really soon, so i put 3-5 of them together to form every part of the rope"?

Can you help? Please?
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Joined: Sat Feb 14, 2009 8:39 pm


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