Exolve update pushed: v1.60 (fancy cell shapes)

[Viresh Ratnakar]

Exolve now supports arbitrary cell shapes (a little SVG knowledge is needed, but should be easy to follow / pick up from looking at the source for this demo).

Here's the CHANGELOG entry:

Version: Exolve v1.60: February 18, 2025

• Add support for non-standard cell shapes via exolve-shaped-cell, which specifies the cell shape using SVG and also indicates where the cell label (if any) should be placed. In the grid, a cell can be marked to have shape #k (k = 1, 2, ...) by suffixing it with [k]. It can also be moved to a desired (x,y) instead of its implied position, by using the suffix [k,x,y]. Shaped cells are assumed to be disconnected from all their neighbours and can only be included in nodir lights.
• Shaped cells typically need to be marked with bars/lines/curves to "block them off" in certain directions. We add the notion of exolve-cell-decorator that can be used to add arbitrary SVG decoration to any cell. The decorator is specified by listing one or more SVG element specs, optionally prefixed by the word "non-clickable" if the separator does not naturally belong to the cell it is in (and hence clicking it should not activate that cell).
• In the grid, a cell can be marked to contain separators numbered k1, k2, .. (1-based) by suffixing it with {k1,k2,...}.
• To help with arrow-key-navigation in grids with shaped cells, we add this small tweak: if there is no light cell in the direction of the arrow, but there is a light cell immediately diagonally (on either side), then we navigate to that cell.
• Add exolve-grid-spacing and exolve-grid-bounds to help with creating grids with shaped cells. Overriding spacings is useful for shapes such as diamonds and hexagons. Overriding bounds is useful when cells are placed arbitrarily (not along a grid).
• Update README.md with details on all the above.