public override bool hit(LineCollider lc, Vector2 p1, Vector2 p2)
{
float a = lc.secondPosition.X - lc.position.X;
float b = lc.secondPosition.Y - lc.position.Y;
float c = (position.X + p1.X) - (lc.position.X + p2.X);
float d = (position.Y + p1.Y) - (lc.position.Y + p2.Y);
float r = radius;
if ((d * a - c * b) * (d * a - c * b) <= r * r * (a * a + b * b))
{
if (c * c + d * d <= r * r)
{
// Line segment start point is inside the circle
return true;
}
if ((a - c) * (a - c) + (b - d) * (b - d) <= r * r)
{
// Line segment end point is inside the circle
return true;
}
if (c * a + d * b >= 0 && c * a + d * b <= a * a + b * b)
{
// Middle section only
return true;
}
}
return false;
}
public override bool hit(LineCollider c, Vector2 p1, Vector2 p2)
{
foreach (Collider colin in within)
{
if(colin.hit(c,p1,p2)) return true;
}
return false;
}
public override bool hit(LineCollider c, Vector2 p1, Vector2 p2)
{
if(hit(c.position,p1,p2) || hit(c.secondPosition,p1,p2)) return true;
foreach(LineCollider l in this.squareToLines())
{
if(c.hit(l,p2,p1))return true;
}
return false;
}
public override bool hit(LineCollider c, Vector2 p1, Vector2 p2)
{
Vector2 q = position + p1;
Vector2 p = c.position + p2;
Vector2 r = c.secondPosition-c.position;
Vector2 s = secondPosition-position;
float rs = cross(r, s);
if (rs == 0)
{
return (cross((q-p), r) != 0);
}
float t = cross((q-p),s)/rs;
float u = cross((q-p), r) / rs;
return (t > 0 && t < 1 && u > 0 && u < 1);
}
public abstract Boolean hit(LineCollider c, Vector2 p1, Vector2 p2);
