public void stay_field(PlanetariaCollider field)
{
if (OnFieldStay.exists)
{
OnFieldStay.data(field);
}
}
public void enter_field(PlanetariaCollider field)
{
if (OnFieldEnter.exists)
{
OnFieldEnter.data(field);
}
}
internal void notify_enter_field(PlanetariaCollider field)
{
foreach (PlanetariaMonoBehaviour observer in observers)
{
observer.enter_field(field);
}
}
public void exit_field(PlanetariaCollider field)
{
if (OnFieldExit.exists)
{
OnFieldExit.data(field);
}
}
public void enter_field(PlanetariaCollider field)
{
if (on_field_enter.exists)
{
on_field_enter.data(field);
}
}
public void stay_field(PlanetariaCollider field)
{
if (on_field_stay.exists)
{
on_field_stay.data(field);
}
}
public void exit_field(PlanetariaCollider field)
{
if (on_field_exit.exists)
{
on_field_exit.data(field);
}
}
//barycentricCoordinate The barycentric coordinate of the triangle we hit. // RESEARCH: are there any equivalents to triangles I should be creating?
//lightmapCoord The uv lightmap coordinate at the impact point.
//textureCoord The uv texture coordinate at the collision location.
//textureCoord2 The secondary uv texture coordinate at the impact point.
//triangleIndex The index of the triangle that was hit.
/// <summary>
/// Constructor - creates the Planetaria equivalent of UnityEngine.RaycastHit
/// </summary>
/// <param name="raycast_arc">The path along which the raycast (inverse path for negative distances).</param>
/// <param name="geometry_arc">The arc which intersects the raycast (i.e. the arc hit).</param>
/// <param name="intersection_point">The intersection point of two circular arcs in 3D space.</param>
/// <returns>The result of a point sweep / raycast in spherical 2D space.</returns>
private PlanetariaRaycastHit(Arc raycast_arc, PlanetariaCollider planetaria_collider, Arc geometry_arc, Vector3 intersection_point, float raycast_distance)
{
arc = geometry_arc;
collider = planetaria_collider;
distance = raycast_arc.position_to_angle(intersection_point) * (raycast_arc.length() / raycast_arc.angle()); // TODO: verify
distance += raycast_arc.length() / 2;
if (raycast_distance < 0)
{
distance = raycast_arc.length() - distance;
}
positive_face_collision = true; // FIXME: HACK: LAZY: // also dynamic changes
Transform internal_transform = collider.gameObject.internal_game_object.GetComponent <Transform>();
Quaternion arc_to_world = internal_transform.rotation;
Quaternion world_to_arc = Quaternion.Inverse(arc_to_world);
Vector3 local_intersection_point = world_to_arc * intersection_point;
float angle = raycast_arc.position_to_angle(local_intersection_point);
Vector3 local_normal = raycast_arc.normal(angle);
normal = arc_to_world * local_normal;
point = intersection_point;
rigidbody = collider.GetComponent <PlanetariaRigidbody>();
transform = Miscellaneous.GetOrAddComponent <PlanetariaTransform>(collider);
}
public static void prepare(PlanetariaCollider collider)
{
discontinuities = new Dictionary <Arc, List <Discontinuity> >();
find_discontinuities(collider);
sort_discontinuities();
collider_variable = collider;
}
/// <summary>
/// Inspector - Finds the collision points between an arc extrapolated to be distance long (the PlanetariaRaycastHit structs have no particular order)
/// </summary>
/// <param name="arc">A fragment that defines the arc in space (might not be fully used or return collisions after the end of the arc).</param>
/// <param name="distance">The distance to raycast (may be greater than or less than the length of the arc - or negative).</param>
/// <param name="layer_mask">The collision mask that defines which objects will be ignored.</param>
/// <returns>All of the collision points of the Raycast (listed exactly once).</returns>
private static PlanetariaRaycastHit[] unordered_raycast_all(Arc arc, float distance, int layer_mask, bool collide_with_fields)
{
//float angle = arc.angle(); // this would determine the intersections for the un-modified arc (ignoring distance)
// desired_angle = desired_length * (partial_angle/partial_length) i.e. length * length_to_angle ratio
float desired_angle = distance * (arc.angle() / arc.length()); // TODO: verify negative distances go backwards
desired_angle = Mathf.Clamp(desired_angle, -2 * Mathf.PI, 2 * Mathf.PI);
// primative arc points
Vector3 arc_left = arc.position(-arc.angle() / 2);
Vector3 arc_center = arc.position(-arc.angle() / 2 + desired_angle / 2);
Vector3 arc_right = arc.position(-arc.angle() / 2 + desired_angle);
SerializedArc ray_arc = ArcFactory.curve(arc_left, arc_center, arc_right);
PlanetariaShape ray_shape = PlanetariaShape.Create(new List <SerializedArc> {
ray_arc
}, false);
// composites
Vector3 arc_boundary_midpoint = (arc_left + arc_right) / 2; // if the arc is like a wooden bow, this is the midpoint of the string
Vector3 arc_forward = (arc_center - arc_boundary_midpoint).normalized; // the direction a hypothetical arrow would travel
Vector3 arc_up = arc.floor().normal; // orthogonal/perpendicular to the imaginary "bow"
// UnityEngine.Physics.OverlapBox() requirements
// FIXME: OPTIMIZE: half_extents currently provides unnecessary false positives because the "width" of plane (the depth into the distance and zero height are fine)
Vector3 half_extents = new Vector3(1, 0, 1); // The largest collision "box" for a unit sphere is a radius of 1 in the x-z plane; height along y is 0.
Vector3 center = arc_boundary_midpoint + arc_forward * 1; // The center of the "box" must be offset 1 (the radius) along the forward axis from the two arc boundaries.
Quaternion rotation = Quaternion.LookRotation(arc_forward, arc_up);
// SphereColliders (only) that represent potential collisions (not guaranteed).
Collider[] colliders = Physics.OverlapBox(center, half_extents, rotation, layer_mask, QueryTriggerInteraction.Collide); // TODO: verify this casts properly
List <PlanetariaRaycastHit> raycast_hits = new List <PlanetariaRaycastHit>();
Debug.Log(colliders.Length);
foreach (SphereCollider sphere_collider in colliders)
{
PlanetariaCollider planetaria_collider = PlanetariaCache.collider_fetch(sphere_collider);
if (planetaria_collider.is_field && !collide_with_fields)
{
Debug.LogError("Why?");
continue;
}
Quaternion geometry_rotation = planetaria_collider.gameObject.internal_game_object.transform.rotation;
Debug.Log("Found a collider with " + planetaria_collider.shape.Length + " arcs.");
foreach (Arc geometry_arc in ray_shape.block_collision(planetaria_collider.shape, geometry_rotation))
{
Vector3[] intersections = PlanetariaIntersection.raycast_intersection(arc, geometry_arc, distance, geometry_rotation); // TODO: verify distance is indeed the angle in this scenario
Debug.Log("Found an arc with " + intersections.Length + " intersections.");
foreach (Vector3 intersection in intersections)
{
PlanetariaRaycastHit single_collision = PlanetariaRaycastHit.hit(arc, planetaria_collider, geometry_arc, intersection, distance);
raycast_hits.Add(single_collision);
}
}
}
return(raycast_hits.ToArray());
}
internal void notify_exit_field(PlanetariaCollider field)
{
foreach (PlanetariaMonoBehaviour observer in observers)
{
observer.exit_field(field);
}
//current_fields.Remove(field); // Don't want invalidated iterators - swap at end of loop
}
public static PlanetariaCollider collider_fetch(SphereCollider key)
{
if (!collider_cache.ContainsKey(key))
{
PlanetariaCollider planetaria_collider = key.GetComponent <PlanetariaCollider>();
Debug.Assert(planetaria_collider, "SphereColliders must be matched with PlanetariaColliders");
collider_cache.Add(key, planetaria_collider);
}
return(collider_cache[key]);
}
public void initialize(PlanetariaCollider observed, PlanetariaMonoBehaviour[] observers)
{
this.planetaria_collider = observed;
this.planetaria_rigidbody = observed.GetComponent <PlanetariaRigidbody>();
this.planetaria_transformation = observed.GetComponent <PlanetariaTransform>();
foreach (PlanetariaMonoBehaviour observer in observers)
{
if (!this.observers.Contains(observer))
{
this.observers.Add(observer);
}
}
}
/// <summary>
/// Mutator - find all intersections along x=0 or z=0 arcs in southern hemisphere.
/// </summary>
/// <param name="block">The block (set of arcs) to be inspected.</param>
private static void find_discontinuities(PlanetariaCollider collider)
{
foreach (Arc arc in collider.shape.arcs)
{
for (int dimension = 0; dimension < 2; ++dimension) // Intersect already gets quadrants 3-4 by proxy
{
float angle = (Mathf.PI / 2) * dimension;
Vector3 begin = new Vector3(Mathf.Cos(angle), 0, Mathf.Sin(angle));
Vector3 end = Vector3.down;
Vector3[] intersections = PlanetariaIntersection.arc_path_intersections(arc, begin, end, 0);
add_intersections(arc, intersections);
}
}
}
public static optional <TextAsset> render(PlanetariaCollider collider, float width)
{
VectorGraphicsWriter.begin_canvas();
VectorGraphicsWriter.begin_shape();
BlockRendererIterator.prepare(collider);
foreach (ArcIterator arc_iterator in BlockRendererIterator.arc_iterator())
{
ShapeRenderer.partition_arc(arc_iterator.arc, arc_iterator.begin, arc_iterator.end);
}
VectorGraphicsWriter.end_shape(Color.black, width);
return(VectorGraphicsWriter.end_canvas());
}
private static bool platform_collision(Arc arc, PlanetariaCollider collider, PlanetariaTransform transformation, PlanetariaRigidbody rigidbody, optional <Vector3> intersection_point)
{
Vector3 velocity = Bearing.attractor(rigidbody.get_previous_position(), rigidbody.get_position());
if (intersection_point.exists)
{
float arc_angle = arc.position_to_angle(intersection_point.data);
Vector3 normal = arc.normal(arc_angle);
bool upward_facing_normal = Vector3.Dot(normal, rigidbody.get_acceleration()) <= 0;
bool moving_toward = Vector3.Dot(normal, velocity) <= 0;
if (upward_facing_normal && moving_toward)
{
return(true);
}
}
return(false);
}
public void potential_block_collision(Arc arc, PlanetariaCollider collider)
{
if (planetaria_rigidbody.exists)
{
if (current_collisions.Count == 0 || current_collisions[0].other != collider)
{
optional <BlockCollision> collision = BlockCollision.block_collision(this, arc, collider, planetaria_transformation, planetaria_rigidbody.data);
if (collision.exists)
{
if (planetaria_rigidbody.exists)
{
if (planetaria_rigidbody.data.collide(collision.data, this))
{
collision_candidates.Add(collision.data);
}
}
}
}
}
}
private static void draw_planetaria_collider_gizmos(PlanetariaCollider self, GizmoType gizmo_type)
{
PlanetariaShapeEditor.draw_shape(self.shape, self.gameObject.internal_game_object.transform.rotation);
/*
* if (!self.is_field)
* {
* PlanetariaArcColliderEditor.draw_arc(self.shape.block_list[arc_identifier],
* self.gameObject.internal_game_object.transform.rotation, mask);
* }
* else
* {
* for (int index = 0; index < self.shape.field_list.Length; ++index)
* {
* if (!mask[index])
* {
* PlanetariaSphereColliderEditor.draw_sphere(self.shape.field_list[index],
* self.gameObject.internal_game_object.transform.rotation);
* }
* }
* }
*/
}
/// <summary>
/// Named Constructor - creates the Planetaria equivalent of UnityEngine.RaycastHit
/// </summary>
/// <returns>The result of a point sweep / raycast in spherical 2D space.</returns>
public static PlanetariaRaycastHit hit(Arc raycast_arc, PlanetariaCollider planetaria_collider, Arc geometry_arc, Vector3 intersection_point, float raycast_distance)
{
return(new PlanetariaRaycastHit(raycast_arc, planetaria_collider, geometry_arc, intersection_point, raycast_distance));
}
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);
}
public void potential_field_collision(PlanetariaCollider field)
{
field_candidates.Add(field);
}
public static void cache(PlanetariaCollider collider)
{
PlanetariaCache.collider_cache.Add(collider.get_sphere_collider(), collider);
}
public static void uncache(PlanetariaCollider collider)
{
PlanetariaCache.collider_cache.Remove(collider.get_sphere_collider());
}
