private void UpdateVelocity(PhysicsObject currentObject)
{
// To avoid errors (specifically, NaN), remove velocity if too small.
if (Player.Velocity.Length <= Constants.Physics.MinSpeed)
{
Player.Velocity = Vector3d.Zero;
}
// Gravity
currentObject.Accelerate(-Vector3d.UnitY * Constants.Physics.Gravity);
// Buoyancy
currentObject.Accelerate(Vector3d.UnitY * currentObject.BuoyancyMagnitude);
// Surface friction
Vector3d horizontalVelocity = Vector3d.Multiply(currentObject.Velocity, new Vector3d(1, 0, 1));
if (IsOnGround(currentObject) && horizontalVelocity != Vector3d.Zero)
{
currentObject.Accelerate((-Vector3d.Normalize(horizontalVelocity) * currentObject.KineticFrictionCoefficient * Constants.Physics.Gravity) * horizontalVelocity.Length * Constants.Physics.FrictionSignificance / Constants.Physics.GripSignificance);
}
// Update velocity
currentObject.ApplyAcceleration();
}
