Dealing with general click and drag on the applet and differentiating
between a background drag and dragging an element seemed like too big
a task, so this PR simply provides a slider to rotate the diagram when
the pivot is defined.
Implementing this required storing much more construction data, and
also dealing head-on with GeoGebra's shall we say "strange" choice where
the value of an expression depends on what name it is assigned to...
The resolution of this last bit was to use different GeoGebra names for
Geometry Applet points that start with something other than an uppercase
Roman letter.
With this loaded in under the Firefox debugger, one can see linked WRL files and Java Geometry Applets on arbitrary web pages.
This represents significant progress on #28, but getting more controls and getting it to work in other browsers is still on deck.
Reviewed-on: #38
Co-authored-by: Glen Whitney <glen@studioinfinity.org>
Co-committed-by: Glen Whitney <glen@studioinfinity.org>
