A tile could be solid, one-way and scaled, but not report without
blocking. Water, lava, spikes or a goal zone needed a trigger object
of their own laid over the map. Now a tile has a switch Trigger, and
the collision events name the tile and the cell they met.
- A tile has the switch "Trigger (reports, never blocks)" under
Solid. Its cells hold nothing up: no Move, no falling body, no
ray. They raise On collision enter, stay and exit with the tilemap
as other.
- The three events have the outputs tile, cell x and cell y. Without
a tile, tile is empty and the cell is -1, -1.
- The three events have the input per cell. Off, the default, gives
one event per area: cells of the same tile that touch side by
side. On gives one event per cell.
- The scene view outlines trigger cells in yellow like a trigger
collider, merged to rectangles but never with solid cells.
- Is touching with the map counts trigger tiles, and Set tile works
while the game runs.
- Both systems find the touches with the same overlap check in
runtime/systems/tileTriggers.ts, not through the physics engine.
Decided here:
- Trigger wins over Solid. A tile with both does not block, as with
a collider.
- Water beside lava is two areas, and so are two ponds that touch
only at a corner.
- An area names the cell nearest to the centre of the collider, and
on exit the cell it named last.
- The solid cells of a map still do not name their tile.
- Normal, impulse and point are 0, as with a trigger collider.
- Collision scale and outlines shape a trigger cell like a solid
one. One-way, friction and bounciness have no effect.
Tests:
- Gate on stein2: 205 files, 3104 tests (3067 + 37), exit 0
- e2e 39,40: 106 checks. e2e 1-8,39-43: 490 checks. Both on
melektaus-atx. No full run, the sum of 1648 (1645 + 3) is
reckoned and CI measures it.
- 37 unit tests in tests/core/tile-triggers.test.ts, nearly all
against both systems
- Three e2e checks with a real mouse in block 40l-iv
- 24 unit counter-probes fail tests. Two did not at first, tests
were added for them.
- Two browser counter-probes fail their checks
- Two screenshots looked at (yellow outline, the node with per cell)
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
