Overlap between convex core and capsule doesn't work

[thfProjects]

PhysX 5.5.0

Windows 11

Steps to Trigger Behavior

1. Create a scene with PxCapsuleGeometry shape and a cylinder shape with either PxConvexCoreGeometry or PxCustomGeometry
2. Do scene overlap query between the two

Expected Behavior

Detect overlap

Actual Behavior

No overlap detected, additionally, PxCustomGeometry with cylinder callbacks would sometimes make the application not respond if it overlaps another shape, but I am unable to find out exactly how to reproduce it

[vreutskyy]

Hi @thfProjects
Thanks for the report. It would help if you could provide a code snippet to reproduce this issue.

[thfProjects]

Hi @vreutskyy,
This function triggers the bug:

static void overlapTest(PxPhysics* physics, PxScene* scene, PxMaterial* material) {
	PxCapsuleGeometry capsuleGeometry = PxCapsuleGeometry(1, 1);
	PxConvexCoreGeometry cylinderGeometry = PxConvexCoreGeometry(PxConvexCoreCylinder(1, 1));

	PxActor* capsuleActor = PxCreateKinematic(*physics, PxTransform(PxIdentity), capsuleGeometry, *material, 1);
	PxActor* cylinderActor = PxCreateKinematic(*physics, PxTransform(PxIdentity), cylinderGeometry, *material, 1);

	scene->addActor(*capsuleActor);
	scene->addActor(*cylinderActor);

	int maxOverlaps = 1;

	std::vector<PxOverlapHit> hitBuffer(maxOverlaps);
	PxOverlapBuffer hit(hitBuffer.data(), maxOverlaps);

	if (!scene->overlap(cylinderGeometry, PxTransform(PxIdentity), hit)) {
		printf("No overlaps detected");
	} else {
		printf("Overlaps detected");
	}
}

[vreutskyy]

Thanks!
Could you try to add PxQueryFlag::eANY_HIT flag?

	PxOverlapBuffer buf3;
	PxQueryFilterData fd; fd.flags |= PxQueryFlag::eANY_HIT;
	bool res3 = getScene().overlap(PxSphereGeometry(1.0f), PxTransform(PxVec3(-1, 0, 0)), buf3, fd);
	EXPECT_TRUE(res3);
	EXPECT_TRUE(buf3.hasBlock);

[thfProjects]

Tried it, it makes no difference.

[vreutskyy]

Aa. I didn't realize you're trying to use convex core as a overlap geometry. It's not supported yet.

		\param[in] geometry		Geometry of object to check for overlap (supported types are: box, sphere, capsule, convex).

convex here means convex mesh, not convex core. convex core support will be added later.

[thfProjects]

Ahh OK. My bad, it didn't occur to me to check if it was supported.
Thank you for clarifying!

[vreutskyy]

Thanks for finding it. I might forget about that ;)