//Apply friction to both vertical and horizontal momentum based on 'friction' and 'gravity';
//Handle sliding down steep slopes;
void HandleMomentum()
{
//If local momentum is used, transform momentum into world coordinates first;
if (useLocalMomentum)
{
momentum = _characterGameObject.transform.localToWorldMatrix * momentum;
}
Vector3 _verticalMomentum = Vector3.zero;
Vector3 _horizontalMomentum = Vector3.zero;
//Split momentum into vertical and horizontal components;
if (momentum != Vector3.zero)
{
_verticalMomentum = VectorMath.ExtractDotVector(momentum, _characterGameObject.transform.up);
_horizontalMomentum = momentum - _verticalMomentum;
}
//Add gravity to vertical momentum;
_verticalMomentum += _characterGameObject.transform.up * gravity * Time.deltaTime;
//Remove any downward force if the controller is grounded;
if (_state == LocomotionState.Grounded)
{
_verticalMomentum = Vector3.zero;
}
//Apply friction to horizontal momentum based on whether the controller is grounded;
if (_state == LocomotionState.Grounded)
{
_horizontalMomentum = VectorMath.IncrementVectorTowardTargetVector(_horizontalMomentum, groundFriction, Time.deltaTime, Vector3.zero);
}
else
{
_horizontalMomentum = VectorMath.IncrementVectorTowardTargetVector(_horizontalMomentum, airFriction, Time.deltaTime, Vector3.zero);
}
//Add horizontal and vertical momentum back together;
momentum = _horizontalMomentum + _verticalMomentum;
//Project the current momentum onto the current ground normal if the controller is sliding down a slope;
if (_state == LocomotionState.Sliding)
{
momentum = Vector3.ProjectOnPlane(momentum, _characterMover.GetGroundNormal());
}
//Apply slide gravity along ground normal, if controller is sliding;
if (_state == LocomotionState.Sliding)
{
Vector3 _slideDirection = Vector3.ProjectOnPlane(-_characterGameObject.transform.up, _characterMover.GetGroundNormal()).normalized;
momentum += _slideDirection * slideGravity * Time.deltaTime;
momentum = Vector3.ClampMagnitude(momentum, slidingMaxVelocity);
}
//If controller is jumping, override vertical velocity with jumpSpeed;
if (_state == LocomotionState.Jumping)
{
//momentum = VectorMath.RemoveDotVector(momentum, _characterGameObject.transform.up);
//momentum += _characterGameObject.transform.up * jumpSpeed;
if (JumpVelocity != Vector3.zero)
{
momentum.x = 0f;
momentum.z = 0f;
momentum += JumpVelocity;
JumpVelocity = Vector3.zero;
}
}
if (useLocalMomentum)
{
momentum = _characterGameObject.transform.worldToLocalMatrix * momentum;
}
}