random_element for EquiangularPolygons

[videlec]

Fixes #61

[videlec]

Still one bug to fix, this fails a lot with ValueError('the vertices are in clockwise order'). I am not sure what it means.

[videlec]

@saraedum pyeantic changed its mind

sage -t --long flatsurf/geometry/polygon.py

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File "flatsurf/geometry/polygon.py", line 1871, in flatsurf.geometry.polygon.EquiangularPolygons

Failed example:

    P(K(1)) # optional: eantic

Expected:

    Polygon: (0, 0), (1, 0), ((1/2*c0 ~ 0.70710678), (-1/2*c0+1 ~ 0.29289322))

Got:

    Polygon: (0, 0), (1, 0), (1/2*c0, -1/2*c0 + 1)

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[videlec]

@saraedum this looks more critical

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File "flatsurf/geometry/polygon.py", line 1890, in flatsurf.geometry.polygon.EquiangularPolygons

Failed example:

    from pyexactreal import ExactReals # optional: exactreal

Expected nothing

Got:

    cling::DynamicLibraryManager::loadLibrary(): /home/travis/miniconda/envs/test-environment/lib/libexactreal.so.0.0.0: undefined symbol: fmpq_mul_si

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File "flatsurf/geometry/polygon.py", line 1891, in flatsurf.geometry.polygon.EquiangularPolygons

Failed example:

    R = ExactReals(P.base_ring()) # optional: exactreal

Exception raised:

    Traceback (most recent call last):

      File "sage/misc/cachefunc.pyx", line 996, in sage.misc.cachefunc.CachedFunction.__call__ (build/cythonized/sage/misc/cachefunc.c:5863)

        return self.cache[k]

      File "sage/misc/weak_dict.pyx", line 705, in sage.misc.weak_dict.WeakValueDictionary.__getitem__ (build/cythonized/sage/misc/weak_dict.c:3646)

        raise KeyError(k)

    KeyError: ((<class 'pyexactreal.exact_reals.ExactReals'>, Number Field in c0 with defining polynomial x^2 - 2 with c0 = 1.414213562373095?, Category of infinite integral domains), ())

    During handling of the above exception, another exception occurred:

    Traceback (most recent call last):

      File "/home/travis/miniconda/envs/test-environment/lib/python3.7/site-packages/sage/doctest/forker.py", line 681, in _run

        self.compile_and_execute(example, compiler, test.globs)

      File "/home/travis/miniconda/envs/test-environment/lib/python3.7/site-packages/sage/doctest/forker.py", line 1123, in compile_and_execute

        exec(compiled, globs)

      File "<doctest flatsurf.geometry.polygon.EquiangularPolygons[13]>", line 1, in <module>

        R = ExactReals(P.base_ring()) # optional: exactreal

      File "/home/travis/miniconda/envs/test-environment/lib/python3.7/site-packages/pyexactreal/__init__.py", line 102, in ExactReals

        return ER(base, *args, **kwargs)

      File "sage/misc/classcall_metaclass.pyx", line 334, in sage.misc.classcall_metaclass.ClasscallMetaclass.__call__ (build/cythonized/sage/misc/classcall_metaclass.c:1713)

        return cls.classcall(cls, *args, **kwds)

      File "/home/travis/miniconda/envs/test-environment/lib/python3.7/site-packages/pyexactreal/exact_reals.py", line 618, in __classcall__

        return super(ExactReals, cls).__classcall__(cls, base, category)

      File "sage/misc/cachefunc.pyx", line 1001, in sage.misc.cachefunc.CachedFunction.__call__ (build/cythonized/sage/misc/cachefunc.c:5989)

        w = self.f(*args, **kwds)

      File "/home/travis/miniconda/envs/test-environment/lib/python3.7/site-packages/sage/structure/unique_representation.py", line 1027, in __classcall__

        instance = typecall(cls, *args, **options)

      File "sage/misc/classcall_metaclass.pyx", line 505, in sage.misc.classcall_metaclass.typecall (build/cythonized/sage/misc/classcall_metaclass.c:2163)

        return (<PyTypeObject*>type).tp_call(cls, args, kwds)

      File "/home/travis/miniconda/envs/test-environment/lib/python3.7/site-packages/pyexactreal/exact_reals.py", line 627, in __init__

        ring = exactreal.NumberField(base.renf)

    TypeError: none of the 5 overloaded methods succeeded. Full details:

      NumberField::NumberField(exactreal::NumberField&&) =>

        ValueError: could not convert argument 1 (object is not an rvalue)

      NumberField::NumberField(const eantic::renf_elem_class&) =>

        TypeError: could not convert argument 1

      exactreal::NumberField constructor failed

      NumberField::NumberField(const exactreal::NumberField&) =>

        TypeError: could not convert argument 1

      NumberField::NumberField() =>

        TypeError: takes at most 0 arguments (1 given)

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