float dist_point_line_nosqr(vector3d &v1,
const float &x, const float &y, const float &z,
const float &px, const float &py, const float &pz)
{
float v1_mag_nosqr=v1.mag_nosqr();
if(v1_mag_nosqr<=0) return 100000.0;
vector3d v2(px-x,py-y,pz-z);
return crossproduct(v1,v2).mag_nosqr()/v1_mag_nosqr;
}
