public List <Vector3> FindCirclePoint(List <Vector3> points, DynamicLight light)
{
for (int i = 0; i < points.Count; i++)
{
Vector2 direction = points[i] - light.transform.position;
float distance = Mathf.Sqrt(direction.x * direction.x + direction.y * direction.y);
RaycastHit2D[] hits = Physics2D.RaycastAll(light.transform.position, direction, distance, light.layer);
bool touchAnotherCollider = false;
foreach (RaycastHit2D h in hits)
{
if (h.collider != circle)
{
touchAnotherCollider = true;
break;
}
}
if (!touchAnotherCollider)
{
float angle = Light_Tools.GetAngle(direction);
points[i] = new Vector3(points[i].x, points[i].y, angle);
}
else
{
points.Remove(points[i]);
i--;
}
}
return(points);
}
//trouve tous les points qui sont "visibles" par la lumière
public List <Vector3> FindPoint(List <Vector3> points, DynamicLight light)
{
for (int i = 0; i < points.Count; i++)
{
Vector2 direction = points[i] - light.transform.position;
float distance = Mathf.Sqrt(direction.x * direction.x + direction.y * direction.y) - 0.05f;;
if (distance <= light.GetRadius())
{
// on s'arrête juste avant le collider pour voir s'il touche quand même. Si c'est le cas alors le raycast se rentre dedans.
RaycastHit2D hit = Physics2D.Raycast(light.transform.position, direction, distance - 0.05f, light.layer);
// si le raycast ne touche rien alors le collider est en contacte direct avec la lumière
if (!hit)
{
float angle = Light_Tools.GetAngle(direction);
points[i] = new Vector3(points[i].x, points[i].y, angle);
}
// si le dernier point n'est pas le collider cela veut dire que,
// normalement il aurait due être pris en compte mais un objet bloque la lumière
else
{
points.Remove(points[i]);
i--;
}
}
else
{
points.Remove(points[i]);
i--;
}
}
return(points);
}
public List <Vector3> GetVertices(List <Vector3> points, DynamicLight light)
{
// ---
bool inversion = false;
// on cherche la tangentes à du cercle passant par l'origine de la lumiére
// le cercle du colider
float x0 = center.x - light.transform.position.x;
float y0 = center.y - light.transform.position.y;
float r0 = circle.radius * circle.transform.localScale.x;
// le cercle qui à pour point l'origine de la lumière, le centre du cercle collider, et les points des tangentes
float x1 = x0 / 2;
float y1 = y0 / 2;
float r1 = Mathf.Sqrt(x1 * x1 + y1 * y1);
if (Mathf.Abs(y0 - y1) < 0.3f)
{
inversion = true;
float _ = x0;
x0 = y0;
y0 = _;
_ = x1;
x1 = y1;
y1 = _;
}
float A, B, C, N, a, delta;
// un coef utile pour ne pas répéter le calcul
a = (x0 - x1) / (y0 - y1);
// pareil
N = (r1 * r1 - r0 * r0 - x1 * x1 + x0 * x0 - y1 * y1 + y0 * y0) / (2 * (y0 - y1));
// on a une équation du second degrés du type Ax² + Bx + C =0
A = a * a + 1;
B = 2 * y0 * a - 2 * N * a - 2 * x0;
C = x0 * x0 + y0 * y0 + N * N - r0 * r0 - 2 * y0 * N;
// on trouve le delta
delta = Mathf.Sqrt(B * B - 4 * A * C);
// on en déduit les deux solutions
for (int i = -1; i < 2; i += 2)
{
float x = (-B - delta * i) / (2 * A);
float y = N - x * a;
if (inversion)
{
float _ = y;
y = x;
x = _;
}
points.Add(new Vector3(x + light.transform.position.x, y + light.transform.position.y));
}
for (int i = 0; i < 2; i++)
{
Vector3 direction = points[i] - light.transform.position;
points[i] = new Vector3(points[i].x, points[i].y, Light_Tools.GetAngle(direction));
}
return(points);
}
// fait les tests pour les projections pour les ombres ( cercle ) //
public List <Vector3> CreateCircleLimit(List <Vector3> points, DynamicLight light)
{
for (int i = 0; i < points.Count; i++)
{
Vector3 limite = Vector3.zero;
Vector3 direction = points[i] - light.transform.position;
float distance = Mathf.Sqrt(direction.x * direction.x + direction.y * direction.y);
if (light.GetRadius() - distance > 0)
{
RaycastHit2D[] hit = Physics2D.RaycastAll(points[i], direction, light.GetRadius() - distance, light.layer);
float angle = direction.z;
foreach (RaycastHit2D h in hit)
{
if (h.collider != circle)
{
limite = h.point;
break;
}
}
if (limite == Vector3.zero)
{
limite = new Vector3(light.transform.position.x + Mathf.Cos(angle) * light.GetRadius()
, light.transform.position.y + Mathf.Sin(angle) * light.GetRadius()
);
}
limite.z = angle;
// redondance
if (i < points.Count - 1)
{
points.Insert(i, limite);
i++;
}
else if (points.Count == 1)
{
float angleCollider = Light_Tools.GetAngle(circle.transform.position - light.transform.position);
if (points[0].z <angleCollider || points[0].z - angleCollider> Mathf.PI)
{
points.Insert(0, limite);
}
else
{
points.Add(limite);
}
}
else
{
points.Add(limite);
i++;
}
}
}
if (Mathf.PI < Mathf.Abs(points[points.Count - 1].z) - Mathf.Abs(points[0].z))
{
Vector3 _ = points[0];
points[0] = points[1];
points[1] = _;
_ = points[points.Count - 1];
points[points.Count - 1] = points[points.Count - 2];
points[points.Count - 2] = _;
}
return(points);
}
public List <Vector3> CreateBoxLimit(List <Vector3> points, Collider2D collider, DynamicLight light)
{
int nbPoint = points.Count;
for (int i = 0; i < nbPoint; i++)
{
float angle = Mathf.Abs(points[i].z);
// le facteur permet de positionner un peu plus loin l'origine du point pour éviter que le raycast commence à la limite du collider
Vector3 facteur = new Vector3(0.1f * Mathf.Cos(angle), 0.1f * Mathf.Sin(angle));
Vector2 origine = points[i] + facteur;
// la distance entre le centre de la lumière et le point d'origine de notre raycast c'est pour éviter que le raycast ne dépasse la limite du cercle
if (!Physics2D.OverlapPoint(origine, light.layer))
{
Vector3 limite = new Vector3();
Vector3 direction = points[i] - light.transform.position;
float distance = Mathf.Sqrt(direction.x * direction.x + direction.y * direction.y);
RaycastHit2D hit = Physics2D.Raycast(origine, direction, light.GetRadius() - distance, light.layer);
if (hit)
{
limite = hit.point;
}
else
{
limite = new Vector3(light.transform.position.x + Mathf.Cos(angle) * light.GetRadius()
, light.transform.position.y + Mathf.Sin(angle) * light.GetRadius()
);
}
limite += new Vector3(0, 0, direction.z);
float angleCollider = Light_Tools.GetAngle(collider.transform.position - light.transform.position);
if (limite.z < angleCollider)
{
if (Mathf.Abs(limite.z - angleCollider) > Mathf.PI)
{
points.Add(limite);
}
else
{
points.Insert(i, limite);
i++;
nbPoint++;
}
}
else if (limite.z > angleCollider)
{
if (Mathf.Abs(limite.z - angleCollider) > Mathf.PI)
{
points.Insert(i, limite);
i++;
nbPoint++;
}
else
{
points.Add(limite);
}
}
}
}
if (Mathf.PI < Mathf.Abs(points[points.Count - 1].z) - Mathf.Abs(points[0].z))
{
Vector3 _ = points[0];
points[0] = points[1];
points[1] = _;
_ = points[points.Count - 1];
points[points.Count - 1] = points[points.Count - 2];
points[points.Count - 2] = _;
}
return(points);
}
