// The velocity 'clipping' algorithm that is ran any time a plane is detected throughout
// the PM_SlideMove() func execution.
// It is responsible for:
// Handling velocity orientation along stable planes
// Handling velocity clipping along unstable 'wall' planes
public static void PM_SlideClipVelocity(
ref Vector3 _velocity,
bool _stability,
Vector3 _plane,
bool _groundstability,
Vector3 _groundplane,
Vector3 _up)
{
float _m = _velocity.magnitude;
if (_m <= 0F) // preventing NaN generation
{
return;
}
else
{
if (VectorHeader.Dot(_velocity / _m, _plane) < 0F) // only clip if we're piercing into the infinite plane
{
if (_stability) // if stable, just orient and maintain magnitude
{
// anyways just orient along the newly discovered stable plane
//VectorHeader.CrossProjection(ref _velocity, _up, _groundplane);
VectorHeader.ClipVector(ref _velocity, _plane);
}
else
{
if (_groundstability) // clip along the surface of the ground
{
// clip normally
VectorHeader.ClipVector(ref _velocity, _plane);
// orient velocity to ground plane
VectorHeader.CrossProjection(ref _velocity, _up, _groundplane);
// i'd originally used this but when orienting velocities above certain planes,
// issues would arise where velocities would be clipped and projected in the opposite
// direction of where the character should be moving, so I'm resorting to orienting
// in this particular scenario....
// VectorHeader.ClipVector(ref _vel, _groundplane);
}
else // wall clip
{
VectorHeader.ClipVector(ref _velocity, _plane);
}
}
}
else
{
return;
}
}
}
public override void Simulate(ActorArgs _args)
{
ActorHeader.Actor Actor = _args.Actor;
ActorHeader.GroundHit Ground = Actor.Ground;
ActorHeader.GroundHit LastGround = Actor.LastGround;
Vector3 Velocity = Actor._velocity;
Vector3 Wish = _args.ViewWishDir;
bool Grounded = Actor.SnapEnabled && Ground.stable;
if (Grounded && !LastGround.stable) // Landing
{
VectorHeader.ClipVector(ref Velocity, Ground.normal);
}
// Orient Wish Velocity to grounding plane
if (Grounded && OrientVelocityToGroundPlane)
{
VectorHeader.CrossProjection(ref Wish, new Vector3(0, 1, 0), Ground.normal);
}
else
{
// Clip Wish Velocity along upward plane if we're not orienting/stable as we may be able to fight gravity if not done
VectorHeader.ClipVector(ref Wish, new Vector3(0, 1, 0));
Wish.Normalize();
}
//if (Grounded) // Subtract max speed based on stability
// BehaviourHeader.DetermineWishVelocity(ref Velocity, Wish, MaximumGroundMoveSpeed, GroundAcceleration * GlobalTime.FDT);
//else
// BehaviourHeader.DetermineWishVelocity(ref Velocity, Wish, MaximumAirMoveSpeed, AirAcceleration * GlobalTime.FDT);
if (Grounded)
{
BehaviourHeader.ApplyAcceleration(ref Velocity, Wish, MaximumGroundMoveSpeed, GroundAcceleration);
}
else
{
BehaviourHeader.ApplyAcceleration(ref Velocity, Wish, MaximumAirMoveSpeed, AirAcceleration);
}
Actor.SetVelocity(Velocity);
return;
}