/// <summary>
/// Check for a collision between a LineSegmentCollider and a CircleCollider.
/// </summary>
/// <param name="self"></param>
/// <param name="other"></param>
public static bool Collision(LineSegmentCollider self, CircleCollider other)
{
return(Collision(other, self));
}
public static bool Collision(CircleCollider self, RayCollider other)
{
return(GeometryUtils.CircleToRayPOI(
self.x, self.y, self.radius, other.x1, other.y1, other.x2, other.y2).Length > 0);
}
/// <summary>
/// Check for a collision between a RayCollider and a CircleCollider.
/// </summary>
/// <param name="self"></param>
/// <param name="other"></param>
public static bool Collision(RayCollider self, CircleCollider other)
{
return(Collision(other, self));
}
/// <summary>
/// Check for a collision between a ParticleCollider and a CircleCollider.
/// </summary>
/// <param name="self"></param>
/// <param name="other"></param>
public static bool Collision(ParticleCollider self, CircleCollider other)
{
return Collision(other, self);
}
public static bool Collision(CircleCollider self, CircleCollider other)
{
Vector2 center1 = new Vector2((float)self.x, (float)self.y);
Vector2 center2 = new Vector2((float)other.x, (float)other.y);
return Vector2.Distance(center1, center2) < self.radius + other.radius;
}
public static bool Collision(CircleCollider self, RectCollider other)
{
double cx = self.x, cy = self.y, r = self.radius;
double x = other.x, y = other.y, w = other.width, h = other.height;
double rx = x + w / 2, ry = y + h / 2;
double x_offset = Math.Abs(cx - rx);
double y_offset = Math.Abs(cy - ry);
double half_width = w / 2;
double half_height = h / 2;
if (x_offset > (half_width + r))
return false;
else if (y_offset > (half_height + r))
return false;
if (x_offset <= half_width)
return true;
else if (y_offset <= half_height)
return true;
double deltax = x_offset - half_width;
double deltay = y_offset - half_height;
double dist = Math.Pow(deltax, 2) + Math.Pow(deltay, 2);
return dist <= r * r ? true : false;
}
public static bool Collision(CircleCollider self, RayCollider other)
{
return GeometryUtils.CircleToRayPOI(
self.x, self.y, self.radius, other.x1, other.y1, other.x2, other.y2).Length > 0;
}
public static bool Collision(CircleCollider self, ParticleCollider other)
{
Vector2 center = new Vector2((float)self.x, (float)self.y);
Vector2 particle = new Vector2((float)other.x, (float)other.y);
return Vector2.Distance(center, particle) < self.radius;
}