// Called just before the simulation step. Update the vertical position for hoverness.
private void Mover(float timeStep)
{
// Don't do hovering while the object is selected.
if (!isActive)
{
return;
}
OMV.Vector3 origPosition = m_controllingPrim.RawPosition; // DEBUG DEBUG (for printout below)
// 'movePosition' is where we'd like the prim to be at this moment.
OMV.Vector3 movePosition = m_controllingPrim.RawPosition + m_targetMotor.Step(timeStep);
// If we are very close to our target, turn off the movement motor.
if (m_targetMotor.ErrorIsZero())
{
m_physicsScene.DetailLog("{0},BSPrim.PIDTarget,zeroMovement,movePos={1},pos={2},mass={3}",
m_controllingPrim.LocalID, movePosition, m_controllingPrim.RawPosition, m_controllingPrim.Mass);
m_controllingPrim.ForcePosition = m_targetMotor.TargetValue;
}
else
{
m_controllingPrim.ForcePosition = movePosition;
}
m_physicsScene.DetailLog("{0},BSPrim.PIDTarget,move,fromPos={1},movePos={2}", m_controllingPrim.LocalID, origPosition, movePosition);
}
// Called just before the simulation step. Update the vertical position for hoverness.
private void Mover(float timeStep)
{
// Don't do movement while the object is selected.
if (!isActive)
{
return;
}
// TODO: Decide if the step parameters should be changed depending on the avatar's
// state (flying, colliding, ...). There is code in ODE to do this.
// COMMENTARY: when the user is making the avatar walk, except for falling, the velocity
// specified for the avatar is the one that should be used. For falling, if the avatar
// is not flying and is not colliding then it is presumed to be falling and the Z
// component is not fooled with (thus allowing gravity to do its thing).
// When the avatar is standing, though, the user has specified a velocity of zero and
// the avatar should be standing. But if the avatar is pushed by something in the world
// (raising elevator platform, moving vehicle, ...) the avatar should be allowed to
// move. Thus, the velocity cannot be forced to zero. The problem is that small velocity
// errors can creap in and the avatar will slowly float off in some direction.
// So, the problem is that, when an avatar is standing, we cannot tell creaping error
// from real pushing.
// The code below uses whether the collider is static or moving to decide whether to zero motion.
m_velocityMotor.Step(timeStep);
m_controllingPrim.IsStationary = false;
// If we're not supposed to be moving, make sure things are zero.
if (m_velocityMotor.ErrorIsZero() && m_velocityMotor.TargetValue == OMV.Vector3.Zero)
{
// The avatar shouldn't be moving
m_velocityMotor.Zero();
if (m_controllingPrim.IsColliding)
{
// If we are colliding with a stationary object, presume we're standing and don't move around
if (!m_controllingPrim.ColliderIsMoving && !m_controllingPrim.VolumeDetect)
{
m_physicsScene.DetailLog("{0},BSCharacter.MoveMotor,collidingWithStationary,zeroingMotor",
m_controllingPrim.LocalID);
m_controllingPrim.IsStationary = true;
m_controllingPrim.ZeroMotion(true /* inTaintTime */);
}
// Standing has more friction on the ground
if (m_controllingPrim.Friction != BSParam.AvatarStandingFriction)
{
m_controllingPrim.Friction = BSParam.AvatarStandingFriction;
m_physicsScene.PE.SetFriction(m_controllingPrim.PhysBody, m_controllingPrim.Friction);
}
}
else
{
if (m_controllingPrim.Flying)
{
// Flying and not collising and velocity nearly zero.
m_controllingPrim.ZeroMotion(true /* inTaintTime */);
}
}
m_physicsScene.DetailLog("{0},BSCharacter.MoveMotor,taint,stopping,target={1},colliding={2}",
m_controllingPrim.LocalID, m_velocityMotor.TargetValue, m_controllingPrim.IsColliding);
}
else
{
// Supposed to be moving.
OMV.Vector3 stepVelocity = m_velocityMotor.CurrentValue;
if (m_controllingPrim.Friction != BSParam.AvatarFriction)
{
// Probably starting up walking. Set friction to moving friction.
m_controllingPrim.Friction = BSParam.AvatarFriction;
m_physicsScene.PE.SetFriction(m_controllingPrim.PhysBody, m_controllingPrim.Friction);
}
// If falling, we keep the world's downward vector no matter what the other axis specify.
// The check for RawVelocity.Z < 0 makes jumping work (temporary upward force).
if (!m_controllingPrim.Flying && !m_controllingPrim.IsColliding)
{
if (m_controllingPrim.RawVelocity.Z < 0)
{
stepVelocity.Z = m_controllingPrim.RawVelocity.Z;
}
// DetailLog("{0},BSCharacter.MoveMotor,taint,overrideStepZWithWorldZ,stepVel={1}", LocalID, stepVelocity);
// no BSParam.AvatarJumpFrames supported in this Version :(
}
// 'stepVelocity' is now the speed we'd like the avatar to move in. Turn that into an instantanous force.
OMV.Vector3 moveForce = (stepVelocity - m_controllingPrim.RawVelocity) * m_controllingPrim.Mass;
// Should we check for move force being small and forcing velocity to zero?
// Add special movement force to allow avatars to walk up stepped surfaces.
moveForce += WalkUpStairs();
m_physicsScene.DetailLog("{0},BSCharacter.MoveMotor,move,stepVel={1},vel={2},mass={3},moveForce={4}",
m_controllingPrim.LocalID, stepVelocity, m_controllingPrim.RawVelocity, m_controllingPrim.Mass,
moveForce);
m_physicsScene.PE.ApplyCentralImpulse(m_controllingPrim.PhysBody, moveForce);
}
if (m_preJumpStart != 0 && Util.EnvironmentTickCountSubtract(m_preJumpStart) > 300)
{
m_controllingPrim.IsPreJumping = false;
m_controllingPrim.IsJumping = true;
m_preJumpStart = 0;
OMV.Vector3 target = m_jumpDirection;
target.X *= 1.5f;
target.Y *= 1.5f;
target.Z *= 2.5f; //Scale so that we actually jump
SetVelocityAndTargetInternal(m_controllingPrim.RawVelocity, target, false, 1);
m_jumpStart = Util.EnvironmentTickCount();
}
if (!m_jumpFallState && m_jumpStart != 0 && Util.EnvironmentTickCountSubtract(m_jumpStart) > 500)
{
OMV.Vector3 newTarget = m_controllingPrim.RawVelocity;
newTarget.X *= 1.5f; //Scale so that the jump looks correct
newTarget.Y *= 1.5f;
newTarget.Z *= -0.2f;
SetVelocityAndTargetInternal(m_controllingPrim.RawVelocity, newTarget, false, 3);
m_jumpFallState = true;
}
else if (m_jumpFallState && m_jumpStart != 0 && m_controllingPrim.IsColliding &&
Util.EnvironmentTickCountSubtract(m_jumpStart) > 1500 ||
(m_jumpStart != 0 && Util.EnvironmentTickCountSubtract(m_jumpStart) > 10000)) //Fallback
{
//Reset everything in case something went wrong
m_disallowTargetVelocitySet = false;
m_jumpFallState = false;
m_controllingPrim.IsPreJumping = false;
m_controllingPrim.IsJumping = false;
m_jumpStart = 0;
m_preJumpStart = 0;
}
}
