solved babylon.js - impostor - collider - debug

[ian 89]

Is is there any way to debug impostor of mesh. If we have BABYLON.PhysicsImpostor.BoxImpostor on some mesh, Can we debug bouning box of BoxImpostor or any other impostors, that we can see how Impostors looks like around mesh?
 

greetings

ian

[Deltakosh 4,306]

For boxImpostor you can ask the debugLayer to display the bounding box (which is used to create the impostor)

[ian 89]

I don't think so.

Look at 

Differences between (if we debug bounding Boxes ) Bridge have 

(1. this first example I think that BoxImpostor is shifted because Bridge's origion/pivot is not in center but in center of lower Bridge's face. In this excample I think BoxImpostor is not around Bridge but is shifted because of Bridge's origin)

http://www.babylonjs-playground.com/#MBFUI#3

and
(2. this bounding Box is ok because Bridge's origin is in center of Bridge )

http://www.babylonjs-playground.com/#MBFUI#5

 

[Deltakosh 4,306]

You're right. If pivot is changed then you don't have a visual way today to debug it

[adam 754]

Here is a PhysicsImposterViewer I wrote up real quick.  It only supports Cannon spheres and boxes.

http://www.babylonjs-playground.com/#MBFUI#6

[ian 89]

qul staff. I'll take al look of your code PhysicsImposterViewer. Thank you. 
I don't know a lot like you guys.
qul staff

[ian 89]

2 hours ago, adam said:

Here is a PhysicsImposterViewer I wrote up real quick.  It only supports Cannon spheres and boxes.

http://www.babylonjs-playground.com/#MBFUI#6

qul

[ian 89]

@adam

Can you explain me what exactly this code do? 

What means shape.halfExtents

 

and why you do 

mesh.scaling.x = shape.halfExtents.x * 2;
mesh.scaling.y = shape.halfExtents.y * 2;
mesh.scaling.z = shape.halfExtents.z * 2;

and

mesh.scaling.x = shape.boundingSphereRadius * 2;
mesh.scaling.y = shape.boundingSphereRadius * 2;
mesh.scaling.z = shape.boundingSphereRadius * 2;

why number 2 ?

 

 greetings

Ian

[adam 754]

I multiplied halfExtents and radius by 2 because they are half the size of the body.

Here is a better example:

http://www.babylonjs-playground.com/#BEFOO#183

My goal is to add this to the debugger at some point so that you don't have to add the extra code.

[ian 89]

This your qul example could be included in Inspector for enable/disable (hide/show) physics impostors in scene.
Now Inspector does not have any debug options for physics impostors.

What do you think @Deltakosh @RaananW @Wingnut ? 
Who build Inspector(babylonJS debuger) ?
So we can ping who build Inspector to include physics impostor debuging

What are your opinion about adding physics impostor debuging in Inspector of BabylonJS.

Greetings
Ian

[adam 754]

5 minutes ago, ian said:

This your qul example could be included in Inspector for enable/disable (hide/show) physics impostors in scene.
Now Inspector does not have any debug options for physics impostors.

When I said debugger, I was referring to inspector.

[adam 754]

I just submitted a PR for a physics tab in the inspector.

https://github.com/BabylonJS/Babylon.js/pull/2414