Is there a way to draw the collisions surface of PhysicsShape? I am receiving the warning Non uniform scaling is unsupported for sphere shapes. Setting the radius to the biggest bounding box extent. I think I understand where it’s coming from and probably this is the reason why I see some oddities. But to make sure that this is exactly the reason and not something else I would love to see the borders of collision surfaces. Is there any easy way to visualize PhysicsShape?

There is a debug display view for physics in the inspector. [image]

Use debugMeshFromBody() from this playground: Babylon.js Playground Babylon.js playground is a live editor for Babylon.js WebGL and WebGPU 3D scenes

Maybe the PhysicsViewer class can help? PhysicsViewer | Babylon.js Documentation

Thanks, this is exactly what I was looking for. Quick side question. My guess of the reason of oddities was correct. Under defined circumstances I intentionally collapse the mesh using bone animation, so visually my mesh becomes smaller, but the physics body remains the same in size. How can I adjust the physics body? Both options will work 1) automatic reshaping around new visible mesh size and 2) manual adjusment of the sphere in terms of size and offset.

You have to regenerate the shape and assign it again to the PhysicsBody. Read the last bit of: [image] Using density and an Overview of physics properties Tutorials and tips Hierarchy: mesh.physicsBody.shape.material BODY .setMassProperties() - sets user properties that override calculated values: – mass, inertia, centerOfMass, inertiaOrientation .getMassProperties() - gets resultant properties, calculated then overridden .setLinearDamping(linDamp) .setAngularDamping(angDamp) .setGravityFactor(gravFact) SHAPE .density other shape properties: .filterCollideMask, .filterMembershipMask, .isTrigger MATERIAL .friction .staticFriction .restitution .frictionComb…

@HiGreg, it doesn’t seem to work, or am I doing something wrong? https://playground.babylonjs.com/#KRDD6Y

One is diameter and other is radius. Also, hide first body and show second. Babylon.js Playground Babylon.js playground is a live editor for Babylon.js WebGL and WebGPU 3D scenes

Some final notes. I noticed that my initial issue wasn’t related to PhysicsShape, but to mesh bounding info. Bounding info is not updated when mesh is deformed using skeleton bones. This line actually solved my original issue: mesh.refreshBoundingInfo(true);. Keep in mind, that refreshBoundingInfo method is very expensive and should not be used continously. Maybe only on final frames or on just a few key frames. I will accept Cedric answer as a solution, because it is the closest to the original question that is stated in the header.

[image] New feature: BoundingInfoHelper Announcements Hey team! I’m pleased to announce a new feature for you folks to test: The BoundingInfoHelper! This class is meant to let you tap into the GPU to compute the bounding box of a list of meshes. As you know, by default, Babylon will update the bounding box on every frame but only by applying the new world matrix, As the bones and the morph targets are applied on the GPU during rendering the CPU has no clue about how to extend the bounding box to take them in account. That could be a problem for…

How to visually show actual PhysicsShape for debugging purposes?

Questions

HiGreg December 10, 2024, 9:31pm 7

You have to regenerate the shape and assign it again to the PhysicsBody. Read the last bit of:

Topic		Replies	Views
Incorrect size of physics body Bugs physics , havok	7	288	June 6, 2024
Synchronizing the scaling of PhysicsShapes with a Mesh Questions animation , mesh , havok , scaling , physicsshape	5	248	September 19, 2024
Make CONVEX_HULL visible Questions mesh , geometry , mergemeshes	6	645	May 31, 2023
Is there an easy/more efficient way to set a Havok physics body box shape = mesh's bounding box? Questions boundingbox , havok	18	856	May 24, 2024
V4 some physicsBodies not showing in the inspector Bugs	4	497	March 23, 2019

How to visually show actual PhysicsShape for debugging purposes?

Related topics