PyImathVec3ArrayImpl.h

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//
// SPDX-License-Identifier: BSD-3-Clause
// Copyright Contributors to the OpenEXR Project.
//

// clang-format off

#ifndef _PyImathVec3ArrayImpl_h_
#define _PyImathVec3ArrayImpl_h_

//
// This .C file was turned into a header file so that instantiations
// of the various V3* types can be spread across multiple files in
// order to work around MSVC limitations.
//

#include <Python.h>
#define HBOOST_BIND_GLOBAL_PLACEHOLDERS
#include <hboost/python.hpp>
#include <hboost/python/make_constructor.hpp>
#include <hboost/format.hpp>
#include <ImathVec.h>
#include <ImathVecAlgo.h>
#include "PyImath.h"
#include "PyImathBox.h"
#include "PyImathVec.h"
#include "PyImathDecorators.h"
#include "PyImathMathExc.h"
#include "PyImathOperators.h"
#include "PyImathVecOperators.h"

namespace PyImath {
using namespace hboost::python;
using namespace IMATH_NAMESPACE;

// XXX fixme - template this
// really this should get generated automatically...

template <class T,int index>
static FixedArray<T>
Vec3Array_get(FixedArray<IMATH_NAMESPACE::Vec3<T> > &va)
{
    return FixedArray<T>(&(va.unchecked_index(0)[index]),
                         va.len(), 3*va.stride(), va.handle(), va.writable());
}

template <class T>
static void
setItemTuple(FixedArray<IMATH_NAMESPACE::Vec3<T> > &va, Py_ssize_t index, const tuple &t)
{
    if(t.attr("__len__")() == 3)
    {
        Vec3<T> v;
        v.x = extract<T>(t[0]);
        v.y = extract<T>(t[1]);
        v.z = extract<T>(t[2]);
        va[va.canonical_index(index)] = v;
    }
    else
      throw std::invalid_argument ("tuple of length 3 expected");
}

template <class T>
static IMATH_NAMESPACE::Vec3<T>
Vec3Array_min(const FixedArray<IMATH_NAMESPACE::Vec3<T> > &a)
{
    Vec3<T> tmp(Vec3<T>(0));
    size_t len = a.len();
    if (len > 0)
        tmp = a[0];
    for (size_t i=1; i < len; ++i)
    {
        if (a[i].x < tmp.x)
            tmp.x = a[i].x;
        if (a[i].y < tmp.y)
            tmp.y = a[i].y;
        if (a[i].z < tmp.z)
            tmp.z = a[i].z;
    }
    return tmp;
}

template <class T>
static IMATH_NAMESPACE::Vec3<T>
Vec3Array_max(const FixedArray<IMATH_NAMESPACE::Vec3<T> > &a)
{
    Vec3<T> tmp(Vec3<T>(0));
    size_t len = a.len();
    if (len > 0)
        tmp = a[0];
    for (size_t i=1; i < len; ++i)
    {
        if (a[i].x > tmp.x)
            tmp.x = a[i].x;
        if (a[i].y > tmp.y)
            tmp.y = a[i].y;
        if (a[i].z > tmp.z)
            tmp.z = a[i].z;
    }
    return tmp;
}

template <class T>
static IMATH_NAMESPACE::Box<IMATH_NAMESPACE::Vec3<T> >
Vec3Array_bounds(const FixedArray<IMATH_NAMESPACE::Vec3<T> > &a)
{
    Box<Vec3<T> > tmp;
    size_t len = a.len();
    for (size_t i=0; i < len; ++i)
        tmp.extendBy(a[i]);
    return tmp;
}


// Trick to register methods for float-only-based vectors
template <class T, IMATH_ENABLE_IF(!std::is_integral<T>::value)>
void register_Vec3Array_floatonly(class_<FixedArray<Vec3<T>>>& vec3Array_class)
{
    generate_member_bindings<op_vecLength<IMATH_NAMESPACE::Vec3<T> >     >(vec3Array_class,"length","");
    generate_member_bindings<op_vecNormalize<IMATH_NAMESPACE::Vec3<T> >  >(vec3Array_class,"normalize","");
    generate_member_bindings<op_vecNormalized<IMATH_NAMESPACE::Vec3<T> > >(vec3Array_class,"normalized","");
    generate_member_bindings<op_vecNormalizeExc<IMATH_NAMESPACE::Vec3<T> >  >(vec3Array_class,"normalizeExc","");
    generate_member_bindings<op_vecNormalizedExc<IMATH_NAMESPACE::Vec3<T> > >(vec3Array_class,"normalizedExc","");
}

template <class T, IMATH_ENABLE_IF(std::is_integral<T>::value)>
void register_Vec3Array_floatonly(class_<FixedArray<Vec3<T>>>& vec3Array_class)
{
}



template <class T>
class_<FixedArray<IMATH_NAMESPACE::Vec3<T> > >
register_Vec3Array()
{
    using hboost::mpl::true_;
    using hboost::mpl::false_;

    class_<FixedArray<IMATH_NAMESPACE::Vec3<T> > > vec3Array_class = FixedArray<IMATH_NAMESPACE::Vec3<T> >::register_("Fixed length array of IMATH_NAMESPACE::Vec3");
    vec3Array_class
        .add_property("x",&Vec3Array_get<T,0>)
        .add_property("y",&Vec3Array_get<T,1>)
        .add_property("z",&Vec3Array_get<T,2>)
        .def("__setitem__", &setItemTuple<T>)
        .def("min", &Vec3Array_min<T>)
        .def("max", &Vec3Array_max<T>)
        .def("bounds", &Vec3Array_bounds<T>)
        ;

    add_arithmetic_math_functions(vec3Array_class);
    add_comparison_functions(vec3Array_class);

    register_Vec3Array_floatonly(vec3Array_class);
    generate_member_bindings<op_vecLength2<IMATH_NAMESPACE::Vec3<T> >    >(vec3Array_class,"length2","");

    generate_member_bindings<op_vec3Cross<T>,           true_>(vec3Array_class,"cross","return the cross product of (self,x)",hboost::python::args("x"));
    generate_member_bindings<op_vecDot<IMATH_NAMESPACE::Vec3<T> >,true_>(vec3Array_class,"dot","return the inner product of (self,x)",hboost::python::args("x"));

    generate_member_bindings<op_mul<IMATH_NAMESPACE::Vec3<T>,T>,  true_>(vec3Array_class,"__mul__" ,"self*x", hboost::python::args("x"));
    generate_member_bindings<op_mul<IMATH_NAMESPACE::Vec3<T>,IMATH_NAMESPACE::M44f>,false_>(vec3Array_class,"__mul__" ,"self*x", hboost::python::args("x"));
    generate_member_bindings<op_mul<IMATH_NAMESPACE::Vec3<T>,IMATH_NAMESPACE::M44d>,false_>(vec3Array_class,"__mul__" ,"self*x", hboost::python::args("x"));

    generate_member_bindings<op_mul<IMATH_NAMESPACE::Vec3<T>,T>,  true_>(vec3Array_class,"__rmul__","x*self", hboost::python::args("x"));
    generate_member_bindings<op_imul<IMATH_NAMESPACE::Vec3<T>,T>, true_>(vec3Array_class,"__imul__","self*=x",hboost::python::args("x"));
    generate_member_bindings<op_div<IMATH_NAMESPACE::Vec3<T>,T>,  true_>(vec3Array_class,"__div__" ,"self/x", hboost::python::args("x"));
    generate_member_bindings<op_div<IMATH_NAMESPACE::Vec3<T>,T>,  true_>(vec3Array_class,"__truediv__" ,"self/x", hboost::python::args("x"));
    generate_member_bindings<op_idiv<IMATH_NAMESPACE::Vec3<T>,T>, true_>(vec3Array_class,"__idiv__","self/=x",hboost::python::args("x"));
    generate_member_bindings<op_idiv<IMATH_NAMESPACE::Vec3<T>,T>, true_>(vec3Array_class,"__itruediv__","self/=x",hboost::python::args("x"));

    decoratecopy(vec3Array_class);

    return vec3Array_class;
}

}  // namespace PyImath

#endif   // _PyImathVec3ArrayImpl_h_