error: cannot convert ‘PyObject*’ {aka ‘_object*’} to ‘const PyArrayObject*’ {aka ‘const tagPyArrayObject_fields*’}

[ForrestPi]

error occurred

mesh/src/aabb_normals.cpp:118:37: error: cannot convert ‘PyObject*’ {aka ‘_object*’} to ‘const PyArrayObject*’ {aka ‘const tagPyArrayObject_fields*’} 118 | npy_intp* v_dims = PyArray_DIMS(py_v); | ^~~~ | | | PyObject* {aka _object*} In file included from /tmp/pip-build-env-4ggzg8lx/normal/lib/python3.10/site-packages/numpy/_core/include/numpy/ndarrayobject.h:12, from /tmp/pip-build-env-4ggzg8lx/normal/lib/python3.10/site-packages/numpy/_core/include/numpy/arrayobject.h:5, from mesh/src/aabb_normals.cpp:4: /tmp/pip-build-env-4ggzg8lx/normal/lib/python3.10/site-packages/numpy/_core/include/numpy/ndarraytypes.h:1520:35: note: initializing argument 1 of ‘npy_intp* PyArray_DIMS(const PyArrayObject*)’ 1520 | PyArray_DIMS(const PyArrayObject *arr) | ~~~~~~~~~~~~~~~~~~~~~^~~ mesh/src/aabb_normals.cpp:119:37: error: cannot convert ‘PyObject*’ {aka ‘_object*’} to ‘const PyArrayObject*’ {aka ‘const tagPyArrayObject_fields*’} 119 | npy_intp* n_dims = PyArray_DIMS(py_n); | ^~~~ | | | PyObject* {aka _object*} In file included from /tmp/pip-build-env-4ggzg8lx/normal/lib/python3.10/site-packages/numpy/_core/include/numpy/ndarrayobject.h:12, from /tmp/pip-build-env-4ggzg8lx/normal/lib/python3.10/site-packages/numpy/_core/include/numpy/arrayobject.h:5, from mesh/src/aabb_normals.cpp:4: /tmp/pip-build-env-4ggzg8lx/normal/lib/python3.10/site-packages/numpy/_core/include/numpy/ndarraytypes.h:1520:35: note: initializing argument 1 of ‘npy_intp* PyArray_DIMS(const PyArrayObject*)’ 1520 | PyArray_DIMS(const PyArrayObject *arr) | ~~~~~~~~~~~~~~~~~~~~~^~~ mesh/src/aabb_normals.cpp:132:87: error: cannot convert ‘PyObject*’ {aka ‘_object*’} to ‘const PyArrayObject*’ {aka ‘const tagPyArrayObject_fields*’} 132 | array<double, 3>* m_sample_points=reinterpret_cast<array<double,3>*>(PyArray_DATA(py_v)); | ^~~~ | | | PyObject* {aka _object*} In file included from /tmp/pip-build-env-4ggzg8lx/normal/lib/python3.10/site-packages/numpy/_core/include/numpy/ndarrayobject.h:12, from /tmp/pip-build-env-4ggzg8lx/normal/lib/python3.10/site-packages/numpy/_core/include/numpy/arrayobject.h:5, from mesh/src/aabb_normals.cpp:4: /tmp/pip-build-env-4ggzg8lx/normal/lib/python3.10/site-packages/numpy/_core/include/numpy/ndarraytypes.h:1508:35: note: initializing argument 1 of ‘void* PyArray_DATA(const PyArrayObject*)’ 1508 | PyArray_DATA(const PyArrayObject *arr) | ~~~~~~~~~~~~~~~~~~~~~^~~ mesh/src/aabb_normals.cpp:133:82: error: cannot convert ‘PyObject*’ {aka ‘_object*’} to ‘const PyArrayObject*’ {aka ‘const tagPyArrayObject_fields*’} 133 | array<double, 3>* m_sample_n=reinterpret_cast<array<double,3>*>(PyArray_DATA(py_n)); | ^~~~ | | | PyObject* {aka _object*} In file included from /tmp/pip-build-env-4ggzg8lx/normal/lib/python3.10/site-packages/numpy/_core/include/numpy/ndarrayobject.h:12, from /tmp/pip-build-env-4ggzg8lx/normal/lib/python3.10/site-packages/numpy/_core/include/numpy/arrayobject.h:5, from mesh/src/aabb_normals.cpp:4: /tmp/pip-build-env-4ggzg8lx/normal/lib/python3.10/site-packages/numpy/_core/include/numpy/ndarraytypes.h:1508:35: note: initializing argument 1 of ‘void* PyArray_DATA(const PyArrayObject*)’ 1508 | PyArray_DATA(const PyArrayObject *arr) | ~~~~~~~~~~~~~~~~~~~~~^~~ mesh/src/aabb_normals.cpp:150:35: warning: narrowing conversion of ‘S’ from ‘size_t’ {aka ‘long unsigned int’} to ‘npy_intp’ {aka ‘long int’} [-Wnarrowing] 150 | npy_intp result1_dims[] = {1, S}; | ^ mesh/src/aabb_normals.cpp:154:74: error: cannot convert ‘PyObject*’ {aka ‘_object*’} to ‘const PyArrayObject*’ {aka ‘const tagPyArrayObject_fields*’} 154 | uint32_t* closest_triangles=reinterpret_cast<uint32_t*>(PyArray_DATA(result1)); | ^~~~~~~ | | | PyObject* {aka _object*} In file included from /tmp/pip-build-env-4ggzg8lx/normal/lib/python3.10/site-packages/numpy/_core/include/numpy/ndarrayobject.h:12, from /tmp/pip-build-env-4ggzg8lx/normal/lib/python3.10/site-packages/numpy/_core/include/numpy/arrayobject.h:5, from mesh/src/aabb_normals.cpp:4: /tmp/pip-build-env-4ggzg8lx/normal/lib/python3.10/site-packages/numpy/_core/include/numpy/ndarraytypes.h:1508:35: note: initializing argument 1 of ‘void* PyArray_DATA(const PyArrayObject*)’ 1508 | PyArray_DATA(const PyArrayObject *arr) | ~~~~~~~~~~~~~~~~~~~~~^~~ mesh/src/aabb_normals.cpp:157:36: warning: narrowing conversion of ‘S’ from ‘size_t’ {aka ‘long unsigned int’} to ‘npy_intp’ {aka ‘long int’} [-Wnarrowing] 157 | npy_intp result2_dims[] = {S, 3}; | ^ mesh/src/aabb_normals.cpp:159:71: error: cannot convert ‘PyObject*’ {aka ‘_object*’} to ‘const PyArrayObject*’ {aka ‘const tagPyArrayObject_fields*’}

which version numpy should work?

[forrest-lam]

Same error! Have you found the compatible version of numpy?

[Krankheit]

This issue is probably caused by numpy versions >= 2.0.0 .
pip install numpy==1.22.4
And change the 6th line of makefile to:
@pip install -r requirements.txt && pip list
Then BOOST_INCLUDE_DIRS=boost_path make all, it should work.

[gcgeng]

This issue is probably caused by numpy versions >= 2.0.0 . pip install numpy==1.22.4 And change the 6th line of makefile to: @pip install -r requirements.txt && pip list Then BOOST_INCLUDE_DIRS=boost_path make all, it should work.

Thanks for the comment, and it works. In addition to this, one may also need to correctly specify numpy version in

mesh/setup.py

Line 231 in 49e7042

additional_kwargs['setup_requires'] = ['setuptools', 'numpy']

to ensure that the pip will install the desired version of numpy.

[YoucanBaby]

This issue is probably caused by numpy versions >= 2.0.0 . pip install numpy==1.22.4 And change the 6th line of makefile to: @pip install -r requirements.txt && pip list Then BOOST_INCLUDE_DIRS=boost_path make all, it should work.

It works for me. Thx a lot!

[sambaPython24]

Even after having installed numpy version 1.22.4, I still have the error

  mesh/src/aabb_normals.cpp:159:71: error: cannot convert ‘PyObject*’ {aka ‘_object*’} to ‘const PyArrayObject*’ {aka ‘const tagPyArrayObject_fields*’}
    159 |         closest_point=reinterpret_cast<array<double,3>*>(PyArray_DATA(result2));
        |                                                                       ^~~~~~~
        |                                                                       |
        |                                                                       PyObject* {aka _object*}
  /tmp/pip-build-env-0iz6e06a/normal/lib/python3.9/site-packages/numpy/_core/include/numpy/ndarraytypes.h:1508:35: note:   initializing argument 1 of ‘void* PyArray_DATA(const PyArrayObject*)’
   1508 | PyArray_DATA(const PyArrayObject *arr)
        |              ~~~~~~~~~~~~~~~~~~~~~^~~
  error: command '/usr/bin/g++' failed with exit code 1
  error: subprocess-exited-with-error

Anybody else with the same error or an idea?

[SekiroRong]

Even after having installed numpy version 1.22.4, I still have the error

  mesh/src/aabb_normals.cpp:159:71: error: cannot convert ‘PyObject*’ {aka ‘_object*’} to ‘const PyArrayObject*’ {aka ‘const tagPyArrayObject_fields*’}
    159 |         closest_point=reinterpret_cast<array<double,3>*>(PyArray_DATA(result2));
        |                                                                       ^~~~~~~
        |                                                                       |
        |                                                                       PyObject* {aka _object*}
  /tmp/pip-build-env-0iz6e06a/normal/lib/python3.9/site-packages/numpy/_core/include/numpy/ndarraytypes.h:1508:35: note:   initializing argument 1 of ‘void* PyArray_DATA(const PyArrayObject*)’
   1508 | PyArray_DATA(const PyArrayObject *arr)
        |              ~~~~~~~~~~~~~~~~~~~~~^~~
  error: command '/usr/bin/g++' failed with exit code 1
  error: subprocess-exited-with-error

Anybody else with the same error or an idea?

Hi, same problem. gcgeng's solution works for my case.

[Mayank-Maurya]

Even I you are using higher versions of numpy, just to remove the error , use typecasting
From:
PyArray_DATA(result)
to:
PyArray_DATA((PyArrayObject*)result)
everywhere in the cpp files