bool SLine::is_vertical_to(SLine &other_line, int epsilon)
{
int dot_prod = dot_product(other_line);
if(epsilon)
{
//calculate
double norm1 = norm();
double norm2 = other_line.norm();
double cosfi = dot_prod/norm1/norm2;
double fi = acos(cosfi);
if(std::abs(DEGREE_TO_RAD(90.0)-fi) < epsilon)
return true;
}
else
return static_cast<bool>(std::abs(dot_prod) < 0.000001);
return false;
}
bool SLine::is_parallel_to(SLine &other_line, int epsilon)
{
double dot_prod = static_cast<double>(dot_product(other_line));
if(dot_prod < 0.0000001)
return false;
double norm1 = norm();
double norm2 = other_line.norm();
double cosfi = dot_prod/norm1/norm2;
double fi = acos(cosfi);
double diff = std::abs(DEGREE_TO_RAD(0.0)-fi);
if(epsilon)
{
if(diff < epsilon)
//calculate
return true;
}
else
{
return static_cast<bool>(std::abs(fi) < 0.000001);
}
return false;
}
