1 reply to this topic

[Max Power]

Hi, I am using this simple filterShader to generate onContactModifyCallbacks with certain shapes. It works well with "normal" collisions, but when "swept integration" is involved, no onContactModify-call gets made. The collision detection itself is fine. Any idea what I should do?

PxFilterFlags FilterShader(
		PxFilterObjectAttributes attributes0, PxFilterData filterData0,
		PxFilterObjectAttributes attributes1, PxFilterData filterData1,
		PxPairFlags& pairFlags, const void* constantBlock, PxU32 constantBlockSize)
{
  if (filterData0.word1 && filterData1.word1)// both are "small", projectile-like objects and dont collide
  {
	return PxFilterFlag::eSUPPRESS;
  }
  else if (filterData0.word0 || filterData1.word0)// one or both of them are "triggerable" and modifyContact should be called
  {
	pairFlags = PxPairFlag::eCONTACT_DEFAULT | PxPairFlag::eNOTIFY_TOUCH_FOUND | PxPairFlag::eMODIFY_CONTACTS
	 | PxPairFlag::eNOTIFY_CONTACT_POINTS | PxPairFlag::eSWEPT_INTEGRATION_LINEAR;
  }
  else
  {
	pairFlags = PxPairFlag::eCONTACT_DEFAULT;
  }
  return PxFilterFlag::eDEFAULT;
}

From testing I know, that swept-integration contacts do get processed here like any other contacts and the pairFlags get set in the same way. Still no contact-modify-call...

Edited by Max Power, 06 September 2012 - 09:22 AM.

[Max Power]

So I have done what, for my purposes, I should have done in the first place and used the simulation-event-callback::onContact instead, because i don't really want to modify the physical properties of the collision anyway. Now the CCD/sweep-collisions trigger as they should, but there's another problem: unlike conventional collisions, the point-data for CCD-contacts comes without impulse-vectors (or 0,0,0-vectors that is), even though the contact-positions are given. Does anyone here know anything about it and maybe how to get that data?

Edited by Max Power, 06 September 2012 - 02:48 PM.