If the end points of the selected edges for an angular dimension were (almost) coincident with their intersection, random angles could be calculated. In essence a floating point inaccuracy issue.
A single `make_dimension` handles three types of dimensions,
(1) simple linear, (2) linear linked to an object, and (3) linked
to a circular edge.
So, we provide a new function, `make_radial_dimension_obj`,
to handle the third case. In this way we can check the input
parameters much better.
We adjust the `Draft_Dimension` Gui Command accordingly.
A single `make_dimension` handles three types of dimensions,
(1) simple linear, (2) linear linked to an object, and (3) linked
to a circular edge.
So, we provide two new functions, `make_linear_dimension`
and `make_linear_dimension_obj`, to handle the first two cases.
In this way we can check the input parameters much better.
We adjust the `Draft_Dimension` Gui Command accordingly.
Previously the `make_dimension` and `make_angular_dimension`
functions were in `draftobjects/dimension.py`.
Now they are moved to `draftmake/make_dimension.py`.
The original `makeAngularDimension` function requires angles
in radians which is counterintuitive for most cases. Also
the order is `[big, small]`.
The new function `make_angular_dimension` accepts angles
in degrees, and the order is `[small, big]`. The older
function is retained for compatibility purposes.
Also perform several improvements such as PEP8 cleanup,
writing complete docstrings, type checking the input arguments,
and depreacting the older call.
The `Draft.py` module, Gui Command, unit test, and test script
are updated accordingly.
In Python 3 `super()` can be used without an argument
in order to get the parent class, `super()`.
In Python 2 the present class must be used as an argument,
`super(ThisClass, self)`.
This commit is done to support Python 2,
as without it all Gui Command tools will be broken
and will fail to launch, even if the unit tests pass.
Also, set the `__metaclass__` variable to `type`.
This is done to turn all classes into "new style" classes
in Python 2. This is required so `super()` works correctly
in this version of Pyton.
This commit can be reverted once Python 2 support
is completely dropped, and only Python 3 compatible code
is used.
