/// <summary>
/// Constructor (Named) -
/// </summary>
/// <param name="arc_visitor"></param>
/// <param name="angular_position"></param>
/// <param name="extrusion"></param>
/// <param name="transformation"></param>
/// <returns></returns>
public static ShapeVisitor geometry_visitor(ArcVisitor arc_visitor, float angular_position, float extrusion, Transform transformation)
{
ShapeVisitor result = new ShapeVisitor(arc_visitor, extrusion, transformation);
result.set_position(angular_position);
return(result);
}
public static optional <BlockCollision> block_collision(CollisionObserver observer, Arc arc, PlanetariaCollider collider, PlanetariaTransform transformation, PlanetariaRigidbody rigidbody)
{
optional <ArcVisitor> arc_visitor = collider.shape.arc_visitor(arc);
if (!arc_visitor.exists)
{
Debug.LogError("This should never happen");
return(new optional <BlockCollision>());
}
Quaternion block_to_world = collider.gameObject.internal_game_object.transform.rotation;
Quaternion world_to_block = Quaternion.Inverse(block_to_world);
Vector3 last_position = world_to_block * rigidbody.get_previous_position();
Vector3 current_position = world_to_block * rigidbody.get_position();
float extrusion = transformation.scale / 2;
optional <Vector3> intersection_point = PlanetariaIntersection.arc_path_intersection(arc, last_position, current_position, extrusion);
if (!intersection_point.exists) // theoretically only happens with moving objects for discrete collision checks
{
// these functions are general inverses of one another, but also serve to constrain/normalize the position to the arc path.
float intersection_angle = arc.position_to_angle(current_position);
if (Mathf.Abs(intersection_angle) <= arc.angle() / 2) // if the intersection is valid
{
intersection_point = arc.position(intersection_angle); // set the collision to the extruded collision point
}
}
if (!intersection_point.exists)
{
Debug.LogError("Research why this happened.");
return(new optional <BlockCollision>());
}
BlockCollision result = new BlockCollision();
float angle = arc.position_to_angle(intersection_point.data);
result.geometry_visitor = ShapeVisitor.geometry_visitor(arc_visitor.data, angle, extrusion, collider.gameObject.internal_game_object.transform);
intersection_point.data = block_to_world * intersection_point.data;
result.distance = Vector3.Angle(intersection_point.data, rigidbody.get_previous_position()) * Mathf.Deg2Rad;
result.overshoot = Vector3.Angle(intersection_point.data, rigidbody.get_position()) * Mathf.Deg2Rad;
result.observer = observer;
result.self = observer.collider();
result.other = collider;
PlanetariaPhysicMaterial self = result.self.material;
PlanetariaPhysicMaterial other = result.other.material;
result.elasticity = PlanetariaPhysics.blend(
self.elasticity, self.elasticity_combine,
other.elasticity, other.elasticity_combine);
result.friction = PlanetariaPhysics.blend(
self.friction, self.friction_combine,
other.friction, other.friction_combine);
result.magnetism =
-(self.magnetism - other.magnetism * self.induced_magnetism_multiplier) *
(other.magnetism - self.magnetism * other.induced_magnetism_multiplier);
return(result);
}