public Vector3 LineIntersectsWindowframeAt(Vector3 begin, Vector3 finish)
{
Strand segment = new Strand(
new Node(begin.x, begin.y),
new Node(finish.x, finish.y)
);
Vector3 direction = (finish - begin).normalized;
float m = segment.getLineM(), c = segment.getLineC();
Vector3 topIntersect, leftIntersect, bottomIntersect, rightIntersect, result = Vector3.zero;
topIntersect = new Vector3((float)(8 - c) / m, 8, 0);
leftIntersect = new Vector3(-8, (float)(m * -8) + c, 0);
bottomIntersect = new Vector3((float)(-8 - c) / m, -8, 0);
rightIntersect = new Vector3(8, (float)(m * 8) + c, 0);
Vector3[] intersects = new Vector3[] { topIntersect, leftIntersect, bottomIntersect, rightIntersect };
float angle;
foreach (Vector3 pt in intersects)
{
Vector3 otherDirection = (pt - finish).normalized;
angle = Vector3.Angle(otherDirection, direction);
if (angle == 0 && (pt.x <= 8 && pt.x >= -8) && (pt.y <= 8 && pt.y >= -8))
{
result = pt;
}
}
return(result);
}
public bool Intersects(Strand other, out Vector3 intersectPt)
{
Vector3 pt = Vector3.zero;
intersectPt = pt;
float m1, m2, c1, c2, x = 0, y = 0;
m1 = this.m;
c1 = this.c;
m2 = other.getLineM();
c2 = other.getLineC();
if (double.IsInfinity(m1))
{
//vertical line x = c
x = c1;
y = (m2 * x) + c2;
}
else if (double.IsInfinity(m2))
{
x = c2;
y = (m1 * x) + c1;
}
else if (m1 != m2)
{
x = (float)System.Math.Round((c1 - c2) / (m2 - m1), 3);
y = (float)System.Math.Round(((m2 * c1) - (m1 * c2)) / (m2 - m1), 3);
}
if (this.ContainsPoint(x, y) && other.ContainsPoint(x, y))
{
// Debug.Log(string.Format("{0} contains ({1},{2})", other.PositionString(), x, y));
intersectPt = new Vector3(x, y, 0);
return(true);
}
return(false);
}