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BulletSim: stop an avatar from moving if standing on a stationary 

object. This will stop avatars from sliding down steep terrains
or objects while still allowing an avatar to be moved if standing
on a moving object.
user_profiles
Robert Adams 2013-03-31 22:16:34 -07:00
parent 933ac60746
commit 84eb25da23
1 changed files with 8 additions and 1 deletions
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9
OpenSim/Region/Physics/BulletSPlugin/BSCharacter.cs
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@ -61,6 +61,7 @@ public sealed class BSCharacter : BSPhysObject
private OMV.Vector3 _rotationalVelocity;
private bool _kinematic;
private float _buoyancy;
private bool _isStationaryStanding; // true is standing on a stationary object
private BSVMotor _velocityMotor;
@ -84,6 +85,7 @@ public sealed class BSCharacter : BSPhysObject
_buoyancy = ComputeBuoyancyFromFlying(isFlying);
Friction = BSParam.AvatarStandingFriction;
Density = BSParam.AvatarDensity / BSParam.DensityScaleFactor;
_isStationaryStanding = false;
// Old versions of ScenePresence passed only the height. If width and/or depth are zero,
// replace with the default values.
@ -208,6 +210,7 @@ public sealed class BSCharacter : BSPhysObject
// The code below uses whether the collider is static or moving to decide whether to zero motion.
_velocityMotor.Step(timeStep);
_isStationaryStanding = false;
// If we're not supposed to be moving, make sure things are zero.
if (_velocityMotor.ErrorIsZero() && _velocityMotor.TargetValue == OMV.Vector3.Zero)
@ -221,6 +224,7 @@ public sealed class BSCharacter : BSPhysObject
if (!ColliderIsMoving)
{
DetailLog("{0},BSCharacter.MoveMotor,collidingWithStationary,zeroingMotion", LocalID);
_isStationaryStanding = true;
ZeroMotion(true /* inTaintTime */);
}
@ -882,7 +886,10 @@ public sealed class BSCharacter : BSPhysObject
// the world that things have changed.
public override void UpdateProperties(EntityProperties entprop)
{
_position = entprop.Position;
// Don't change position if standing on a stationary object.
if (!_isStationaryStanding)
_position = entprop.Position;
_orientation = entprop.Rotation;
// Smooth velocity. OpenSimulator is VERY sensitive to changes in velocity of the avatar