I have a MeshResource and I would like to create a collision component from it.
let childBounds = child.visualBounds(relativeTo: self)
var childShape: ShapeResource
do {
// Crashed by the following line instead of throwing a Swift Error
childShape = try await ShapeResource.generateConvex(from: childModel.mesh);
} catch {
childShape = ShapeResource.generateBox(size: childBounds.extents)
childShape = childShape.offsetBy(translation: childBounds.center)
}
Based on this document: https://developer.apple.com/documentation/realitykit/shaperesource/generateconvex(from:)-6upj9
Will throw an error if mesh does not define a nonempty convex volume. For example, will fail if all the vertices in mesh are coplanar.
But, the method crashes the app instead of throwing a Swift error
Incident Identifier: 35CD58F8-FFE3-48EA-85D3-6D241D8B0B4C
CrashReporter Key: FE6790CA-6481-BEFD-CB26-F4E27652BEAE
Hardware Model: Mac15,11
...
Version: 1.0 (1)
Code Type: ARM-64 (Native)
Role: Foreground
Parent Process: launchd_sim [2057]
Coalition: com.apple.CoreSimulator.SimDevice.85A2B8FA-689F-4237-B4E8-DDB93460F7F6 [1496]
Responsible Process: SimulatorTrampoline [910]
Date/Time: 2025-01-26 16:13:17.5053 +0800
Launch Time: 2025-01-26 16:13:09.5755 +0800
OS Version: macOS 15.2 (24C101)
Release Type: User
Report Version: 104
Exception Type: EXC_BREAKPOINT (SIGTRAP)
Exception Codes: 0x0000000000000001, 0x00000001abf841d0
Termination Reason: SIGNAL 5 Trace/BPT trap: 5
Terminating Process: exc handler [17316]
Triggered by Thread: 0
Thread 0 Crashed:
0 CoreRE 0x1abf841d0 REAssetManagerCollisionShapeAssetCreateConvexPolyhedron + 232
1 CoreRE 0x1abf845f0 REAssetManagerCollisionShapeAssetCreateConvexPolyhedronFromMesh + 868
2 RealityFoundation 0x1d25613bc static ShapeResource.generateConvex(from:) + 148
Here is the message on the app console from Xcode
/Library/Caches/com.apple.xbs/Sources/REKit_Sim/ThirdParty/PhysX/physx/source/physxcooking/src/convex/QuickHullConvexHullLib.cpp (935) : internal error : QuickHullConvexHullLib::findSimplex: Simplex input points appers to be coplanar.
Failed to cook convex mesh (0x3)
assertion failure: 'convexPolyhedronShape != nullptr' (REAssetManagerCollisionShapeAssetCreateConvexPolyhedron:line 356) Bad parameters passed for convex mesh creation.
Message from debug
The above crash happened on a visionOS simulator (visionOS 2.2 (22N840)
