Matterjs, constraints with PhysicsEditor would not stop rotating.

[Befive.Info]

Hello,

I am trying to imitate a rotating part (a.k.a. "windmill" please see this youtube video) using the Matter physics engine's constraint.

I have tested a body shape made with PhysicsEditor and that of simple image shape (just a thin rectangle). The windmill made with PhysicsEditor keeps on rotating and it does not seem to stop until you give another collision to the body.

Here is a codepen to demonstrate. https://codepen.io/BeFiveINFO/pen/EdQgdq

Please try pressing space key for a second.

Is there any way to control the behaviour of the body shape made with PhysicsEditor?

Thank you for your help in advance!

[fmacpro]

Hey,

you can use

setFrictionAir(0.5);

if you set it really low you should get what you want e.g.

https://codepen.io/anon/pen/GYQdop?editors=0010

windMill.setFrictionAir(0.05);

https://photonstorm.github.io/phaser3-docs/Phaser.Physics.Matter.TileBody.html#setFrictionAir__anchor

[AndreasLoew]

@fmacpro is right: That's because you have no air friction set. The windmill has no reason to stop.

You can set friction in the physics settings - see screenshot.

 

[Befive.Info]

@fmacpro

Thank you! It worked like a charm! 

@AndreasLoew

I was trying out your app Btw I just ordered the texture packer + physics editor bundle. Your apps do save time and is worth the money.