Matter-js: How to implement these 2 cases in dyn4j with matter.js ?

[finscn]

I think dyn4j is the best Physics Engine ( http://www.dyn4j.org/ )

There are 2 cases I don't know how to implement with matter-js , please help me, thanks .

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the First :

It's named 'pulley' in dyn4j's demo . When Left Box down, the Right up.

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the Second :

The key point is 'y' .
The top part of 'y' could collide with everything , bottom part doesn't.
but the bottom part would affect center of mass

Thanks.

[photonstorm]

🤣 "this other physics engine is better than yours, but help me re-create their demos anyway, oh and I'll typo the name of your physics engine while I'm at it"

[finscn]

@photonstorm , I've asked this question to p2.js .
And copy it here. I forget to change the name form p2.js to matter.js

I don't understand your mean. Why do you laugh at me ?