Obtain and display transformed current location

[Lorp]

Plan:

• create a new SamsaFont whenever we make a new binary font
• for the current location (any time the current location changes) create an instance at that location
• check the transformed axis locations that will have been generated
• denormalize those axis values and display the transformed current location as a blue dot at 50% opacity

[Lorp]

We can use a similar method to show:

• transformed grid lines,
• representations of transformed instance locations for all the instances being rendered

[Lorp]

Done.

The grid lines representation might be improved, but a basic version is working. And maybe the instances could be represented with different colours (although that might be confusing).