protected void UpdatePalmRotation()
{
Leap.Unity.HandModel hand_model = GetComponent <Leap.Unity.HandModel>();
palm_rotation_ = Quaternion.Slerp(palm_rotation_, hand_model.GetPalmRotation(),
1.0f - rotationFiltering);
}
protected void StartPinch()
{
// Only pinch if we're hovering over an object.
if (active_object_ == null)
{
return;
}
Leap.Unity.HandModel hand_model = GetComponent <Leap.Unity.HandModel>();
Leap.Unity.Utils.IgnoreCollisions(gameObject, active_object_.gameObject, true);
GrabbableObject grabbable = active_object_.GetComponent <GrabbableObject>();
// Setup initial position and rotation conditions.
palm_rotation_ = hand_model.GetPalmRotation();
object_pinch_offset_ = Vector3.zero;
// If we don't center the object, find the closest point in the collider for our grab point.
if (grabbable == null || !grabbable.centerGrabbedObject)
{
Vector3 delta_position = active_object_.transform.position - current_pinch_position_;
Ray pinch_ray = new Ray(current_pinch_position_, delta_position);
RaycastHit pinch_hit;
// If we raycast hits the object, we're outside the collider so grab the hit point.
// If not, we're inside the collider so just use the pinch position.
if (active_object_.Raycast(pinch_ray, out pinch_hit, grabObjectDistance))
{
object_pinch_offset_ = active_object_.transform.position - pinch_hit.point;
}
else
{
object_pinch_offset_ = active_object_.transform.position - current_pinch_position_;
}
}
filtered_pinch_position_ = active_object_.transform.position - object_pinch_offset_;
object_pinch_offset_ = Quaternion.Inverse(active_object_.transform.rotation) *
object_pinch_offset_;
rotation_from_palm_ = Quaternion.Inverse(palm_rotation_) * active_object_.transform.rotation;
// If we can rotate the object quickly, increase max angular velocity for now.
if (grabbable == null || grabbable.rotateQuickly)
{
last_max_angular_velocity_ = active_object_.GetComponent <Rigidbody>().maxAngularVelocity;
active_object_.GetComponent <Rigidbody>().maxAngularVelocity = Mathf.Infinity;
}
if (grabbable != null)
{
// Notify grabbable object that it was grabbed.
grabbable.OnGrab();
if (grabbable.useAxisAlignment)
{
// If this option is enabled we only want to align the object axis with the palm axis
// so we'll cancel out any rotation about the aligned axis.
Vector3 palm_vector = grabbable.rightHandAxis;
if (hand_model.GetLeapHand().IsLeft)
{
palm_vector = Vector3.Scale(palm_vector, new Vector3(-1, 1, 1));
}
Vector3 axis_in_palm = rotation_from_palm_ * grabbable.objectAxis;
Quaternion axis_correction = Quaternion.FromToRotation(axis_in_palm, palm_vector);
if (Vector3.Dot(axis_in_palm, palm_vector) < 0)
{
axis_correction = Quaternion.FromToRotation(axis_in_palm, -palm_vector);
}
rotation_from_palm_ = axis_correction * rotation_from_palm_;
}
}
}