public double getSumOfAngles(Point point)
{
Vector vecRight = new Vector(start, point);
Vector vecLeft = new Vector(end, point);
double angleRight = 180 * (Math.Acos(getDotMultiplication(vecRight) / (length * vecRight.Length))) / Math.PI;
double angleLeft = 180 * (Math.Acos((new Vector(end, start).getDotMultiplication(vecLeft)) / (length * vecLeft.Length))) / Math.PI;
return angleLeft + angleRight;
}
public double getVectorMultiplication(Vector vector)
{
return dx * vector.dy - dy * vector.dx;
}
public Vector getSum(Vector vector)
{
return new Vector(start, new Point(start.X + dx + vector.dx, start.Y + dy + vector.dy));
}
public double getDotMultiplication(Vector vector)
{
return dx * vector.dx + dy * vector.dy;
}
public static Section getFRhom(List<Section> sections, Vector vec)
{
foreach (Section section in sections)
{
if (section.Equals(vec))
return section;
}
return null;
}
public Section(Vector vector, Triangle left, Triangle right)
{
this.Vector = vector;
this.left = left;
this.right = right;
}
public Section(Vector vector)
{
this.Vector = vector;
left = null;
right = null;
}