Reducing allocations in more places can be done by changing now
Vec2f_ptr_from_PyObject, Vec2f_ptr_from_Vector,
Vec3f_ptr_from_PyObject, Vec3r_ptr_from_PyObject ... etc work.
Just change them to accept the vector as an arg
Vec3r *Vec3r_ptr_from_PyObject(PyObject *obj)
... to ...
bool Vec3r_ptr_from_PyObject(PyObject *obj, Vec3r *vec)
{
/* set vec->x,y */
return success; /* false == py-exception */
}
this way the caller can choose to use vectors on the stack (which is
fine in most cases), and only use the heap when its needed.
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