Collision check with Oimo?

[Dinkelborg]

Hi,
I m trying to figure out how to establish a collision check with Oimo, basically what I want to do is:
I have a sphere and when it collides with anything, I want to add an impulse to make it bounce up again.
(The result should be like this: http://analogmadness.com/Demo/ThreeJS )

 

Is there any method or event that one could listen to?

It would be really nice if there were any tutorials for Oimo, it seems after all more capeable than cannon.js

[Temechon]

Hello,

 

You can use actionmanager for objects I guess... With the trigger OnCollisionEnter for example.

There is no collision event in Oimo.

 

If you want to keep the velocity of the ball, you can set its restitution to 1 (the ground should have a restitution set to 1 too).

[Dinkelborg]

Hi,
thanks for the reply,
where is OnCollisionEnter defined, and are there more Triggers that the documentation does not name? (<--)

 

I generally don't know where I can find information about these things, like restitution for example.
Is there any documentation about this?

[davrous]

Hi,

 

 You should have a look to the sample I've built for our free MVA training: http://www.microsoftvirtualacademy.com/training-courses/introduction-to-webgl-3d-with-html5-and-babylon-js . Jump to chapter 7 / Physics Simulation. Is it what you'd like to achieve?

 

Bye,

 

David

[Temechon]

Dinkelborg,

 

You can find some useful information here : 

- http://pixelcodr.com/tutos/plane/plane.html 

             A tutorial about how to use action manager (and OnCollisionEnter but without any physics)

- https://github.com/BabylonJS/Babylon.js/wiki/How-to-use-Actions   

             The babylon wiki, almost everything is well described here (thanks to DK and Wingnut amongts others)

 

For Oimo, nothing really exists (Babylon-side and oimo-side), you may want to look directly in the source code.

However, I can give you some hints  

 

By registering a new impostor with Oimo, you can play with 3 parameters : 

 

- mass (set to 0 if you want the objet not moving with gravity)

- restitution (the amount of bounciness of the object)

- friction (speaks for himself : the needed force to move another object on this object).

 

Don't set restitution (or friction) to 0, they won't be taken into account (Oimo issue here)

 

Example : 

ground.setPhysicsState(BABYLON.PhysicsEngine.BoxImpostor, {mass:0, restitution:0.001});b.setPhysicsState(BABYLON.PhysicsEngine.BoxImpostor, {mass:10, restitution:0.5});

Hope this help.

 

Cheers, 

[Dinkelborg]

Yeah thanks this helps,
I did read the wiki and the documentation about the action manager and all, but the wiki also says:

 

Currently, 10 different triggers are supported:

and non of the mentioned ones is called OnCollisionEnter, so that's why I am confused, is there also OnCollisionExit and OnCollisionStay as for example in Unity's API?

[Temechon]

Erf, my bad... Actually there are called OnIntersection*

 

But it's the same