Decompose Grid.getShapedArea() so we can reuse logic between grids
#4981
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We now calculate these things separately: 1. Which way the token is facing on the grid. 2. The shape of the light itself. 3. The shape of the token's footprint contribution to the light (for cones). With this we gain the following benefits: 1. `IsometricGrid` can reuse the main shape logic and just transform the result. No more duplicated logic. 2. The code should be more approachable as each method does One Thing™. Lights on isometric grids act literally the same as for square grids, just rotated and foreshortened. This fixes some related bugs, e.g., beams not getting visually shorted when vertical. It also means iso grids now have a full set of accurate lights available, e.g., hexes no longer default to ellipses.
kwvanderlinde
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code-maintenance
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Identify the Bug or Feature request
Addresses #4980
Description of the Change
This refactors
Grid.getShapedArea()for more consistency between grid types. The main goal was to allowIsometricGridto reuse the main logic and transform the results rather than having to duplicate and specialize most of the logic for its unique circumstance.With this change, isometric grid lighting behaves the same as for other grid types, save for the footprint area and 45° difference in the meaning of token facing. This means hex lights render as hexes, and beams are properly foreshortened. It also means no special logic for the other shapes, so we can be more confident that those will remain consistent into the future.
Possible Drawbacks
None. Unless folks want to complain about hexes being hexagonal.
Documentation Notes
N/A
Release Notes
This change is