Vector.hh

#ifndef OPENMESH_PYTHON_VECTOR_HH
#define OPENMESH_PYTHON_VECTOR_HH

#include "Python/Bindings.hh"

namespace OpenMesh {
namespace Python {

template <class Vector, class Scalar>
void set_item(Vector& _vec, int _index, Scalar _value) {
        if (_index < 0) {
                _index += _vec.size();
        }

        if ((size_t)_index < _vec.size()) {
                _vec[_index] = _value;
        }
        else {
                PyErr_SetString(PyExc_IndexError, "Index out of range.");
                throw_error_already_set();
        }
}

template <class Vector, class Scalar>
Scalar get_item(Vector& _vec, int _index) {
        if (_index < 0) {
                _index += _vec.size();
        }

        if ((size_t)_index < _vec.size()) {
                return _vec[_index];
        }
        else {
                PyErr_SetString(PyExc_IndexError, "Index out of range.");
                throw_error_already_set();
        }

        return 0.0;
}

namespace {
template<class Scalar>
struct Factory {
        typedef OpenMesh::VectorT<Scalar, 2> Vector2;
        typedef OpenMesh::VectorT<Scalar, 3> Vector3;
        typedef OpenMesh::VectorT<Scalar, 4> Vector4;

        static Vector2 *vec2_default() {
                return new Vector2(Scalar(), Scalar());
        }
        static Vector2 *vec2_user_defined(const Scalar& _v0, const Scalar& _v1) {
                return new Vector2(_v0, _v1);
        }
        static Vector3 *vec3_default() {
                return new Vector3(Scalar(), Scalar(), Scalar());
        }
        static Vector3 *vec3_user_defined(const Scalar& _v0, const Scalar& _v1, const Scalar& _v2) {
                return new Vector3(_v0, _v1, _v2);
        }
        static Vector4 *vec4_default() {
                return new Vector4(Scalar(), Scalar(), Scalar(), Scalar());
        }
        static Vector4 *vec4_user_defined(const Scalar& _v0, const Scalar& _v1, const Scalar& _v2, const Scalar& _v3) {
                return new Vector4(_v0, _v1, _v2, _v3);
        }
};
}

template<class Scalar, class Vector>
void defInitMod(class_< OpenMesh::VectorT<Scalar, 2> > &classVector) {
        classVector
                .def("__init__", make_constructor(&Factory<Scalar>::vec2_default))
                .def("__init__", make_constructor(&Factory<Scalar>::vec2_user_defined))
                ;
}

template<class Scalar, class Vector>
void defInitMod(class_< OpenMesh::VectorT<Scalar, 3> > &classVector) {
        Vector (Vector::*cross)(const Vector&) const = &Vector::operator%;
        classVector
                .def("__init__", make_constructor(&Factory<Scalar>::vec3_default))
                .def("__init__", make_constructor(&Factory<Scalar>::vec3_user_defined))
                .def("__mod__", cross)
                ;
        def("cross", cross);
}

template<class Scalar, class Vector>
void defInitMod(class_< OpenMesh::VectorT<Scalar, 4> > &classVector) {
        classVector
                .def("__init__", make_constructor(&Factory<Scalar>::vec4_default))
                .def("__init__", make_constructor(&Factory<Scalar>::vec4_user_defined))
                ;
}

template<class Scalar, int N>
void expose_vec(const char *_name) {
        typedef OpenMesh::VectorT<Scalar, N> Vector;

        Scalar (Vector::*min_void)() const = &Vector::min;
        Scalar (Vector::*max_void)() const = &Vector::max;

        Vector (Vector::*max_vector)(const Vector&) const = &Vector::max;
        Vector (Vector::*min_vector)(const Vector&) const = &Vector::min;

        Scalar  (Vector::*dot           )(const Vector&) const = &Vector::operator|;
        Scalar  (Vector::*norm          )(void         ) const = &Vector::norm;
        Scalar  (Vector::*length        )(void         ) const = &Vector::length;
        Scalar  (Vector::*sqrnorm       )(void         ) const = &Vector::sqrnorm;
        Vector& (Vector::*normalize     )(void         )       = &Vector::normalize;
        Vector& (Vector::*normalize_cond)(void         )       = &Vector::normalize_cond;

#if (_MSC_VER >= 1900 || __cplusplus > 199711L || defined(__GXX_EXPERIMENTAL_CXX0X__)) && !defined(OPENMESH_VECTOR_LEGACY)
        Vector (Vector::*normalized)() const = &Vector::normalized;
#else
        const Vector (Vector::*normalized)() const = &Vector::normalized;
#endif

        class_<Vector> classVector = class_<Vector>(_name);

        classVector
                .def("__setitem__", &set_item<Vector, Scalar>)
                .def("__getitem__", &get_item<Vector, Scalar>)
                .def(self == self)
                .def(self != self)
                .def(self *= Scalar())
                .def(self /= Scalar())
                .def(self * Scalar())
                .def(Scalar() * self)
                .def(self / Scalar())
                .def(self *= self)
                .def(self /= self)
                .def(self -= self)
                .def(self += self)
                .def(self * self)
                .def(self / self)
                .def(self + self)
                .def(self - self)
                .def(-self)
                .def(self | self)
                .def("vectorize", &Vector::vectorize, return_internal_reference<>())
                .def(self < self)

                .def("dot", dot)
                .def("norm", norm)
                .def("length", length)
                .def("sqrnorm", sqrnorm)
                .def("normalized", normalized)
                .def("normalize", normalize, return_internal_reference<>())
                .def("normalize_cond", normalize_cond, return_internal_reference<>())

                .def("l1_norm", &Vector::l1_norm)
                .def("l8_norm", &Vector::l8_norm)

                .def("max", max_void)
                .def("max_abs", &Vector::max_abs)
                .def("min", min_void)
                .def("min_abs", &Vector::min_abs)
                .def("mean", &Vector::mean)
                .def("mean_abs", &Vector::mean_abs)
                .def("minimize", &Vector::minimize, return_internal_reference<>())
                .def("minimized", &Vector::minimized)
                .def("maximize", &Vector::maximize, return_internal_reference<>())
                .def("maximized", &Vector::maximized)
                .def("min", min_vector)
                .def("max", max_vector)

                .def("size", &Vector::size)
                .staticmethod("size")
                .def("vectorized", &Vector::vectorized)
                .staticmethod("vectorized")
                ;

        defInitMod<Scalar, Vector>(classVector);
}

} // namespace OpenMesh
} // namespace Python

#endif