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Fix weird jitters when jumping and kicking

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NOTE: If you are using a version of PhysX prior to 2.6.4, then you should
test very carefully if you should keep this commit. This change fixed a
bug that caused avatars to get stuck falling against certain colliders. It
seems to no longer be needed.
This commit is contained in:
Adam Johnson
2012-02-11 22:40:42 -05:00
parent 7dcf2e66a3
commit 80213f3edd
1 changed files with 0 additions and 41 deletions
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41
Sources/Plasma/PubUtilLib/plAvatar/plPhysicalControllerCore.cpp
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@ -323,48 +323,7 @@ void plWalkingStrategy::Apply(float delSecs)
LinearVelocity.fX = AchievedLinearVelocity.fX;
LinearVelocity.fY = AchievedLinearVelocity.fY;
}
if (!IsOnGround() || IsOnFalseGround())
{
// We're not on solid ground, so we should be sliding against whatever
// we're hitting (like a rock cliff). Each vector in fSlidingNormals is
// the surface normal of a collision that's too steep to be ground, so
// we project our current velocity onto that plane and slide along the
// wall.
//
// Also, sometimes PhysX reports a bunch of collisions from the wall,
// but nothing from underneath (when there should be). So if we're not
// touching ground, we offset the avatar in the direction of the
// surface normal(s). This doesn't fix the issue 100%, but it's a hell
// of a lot better than nothing, and suitable duct tape until a future
// PhysX revision fixes the issue.
//
// Yes, there's room for optimization here if we care.
hsVector3 offset(0.f, 0.f, 0.f);
for (int i = 0; i < fContactNormals.GetCount(); i++)
{
offset += fContactNormals[i];
hsVector3 velNorm = LinearVelocity;
if (velNorm.MagnitudeSquared() > 0)
velNorm.Normalize();
if (velNorm * fContactNormals[i] < 0)
{
hsVector3 proj = (velNorm % fContactNormals[i]) % fContactNormals[i];
if (velNorm * proj < 0)
proj *= -1.f;
LinearVelocity = LinearVelocity.Magnitude() * proj;
}
}
if (offset.MagnitudeSquared() > 0)
{
// 5 ft/sec is roughly the speed we walk backwards.
// The higher the value, the less likely you'll trip
// the bug, and this seems reasonable.
offset.Normalize();
LinearVelocity += offset * 5.0f;
}
}
//make terminal velocity equal to k. it is wrong but has been this way and
//don't want to break any puzzles. on top of that it will reduce tunneling behavior
if(LinearVelocity.fZ<kGravity)LinearVelocity.fZ=kGravity;