Method GetAngle

src/Base/Tools2D.cpp:34–54

using namespace Base;

double Vector2d::GetAngle(const Vector2d& vec) const
{
    double fDivid = 0.0;
    double fNum = 0.0;

    fDivid = Length() * vec.Length();

    if ((fDivid < -1e-10) || (fDivid > 1e-10)) {
        fNum = (*this * vec) / fDivid;
        if (fNum < -1) {
            return std::numbers::pi;
        }
        if (fNum > 1) {
            return 0.0;
        }

        return acos(fNum);
    }

    return -std::numeric_limits<double>::max();  // division by zero
}

void Vector2d::ProjectToLine(const Vector2d& point, const Vector2d& line)
{