Entry 112

Skeith's arena: EVENTAREAB0 for fields 1-8, and how area 27's last door gets there

2026-09-25worldrendertest

Filescrates/piney-world/src/evarea_b0.rscrates/piney-world/src/field_world.rscrates/piney-world/src/map/mod.rscrates/piney-world/src/lib.rscrates/piney-world/examples/evarea_probe.rscrates/piney-game/src/main.rstools/test_evarea_rs.pydocs/engine/evarea.md

Part two of Skeith (109) begins with where the fight happens.

Where event 30 goes

Event 30 (ML0180) is Infection's last main event. Its blocks 17-19 are Chosen Hopeless Nothingness (area 27), the field and the dungeon. Block 20's settings are in_field town=1 field=1, in_point 1 and phase == 0:

• entry type=7 code=0;
• battle_ready;
• save_party.

Settings accumulate from block to block into currentOpen, and CheckCurrentOpen compares the whole scene. Field 1 has no words and no event leads there with scene or area.

The door. Area 27's dungeon row floor 4 room 3 is of type 16. Entering it, GotoNextRoom's branch for areas 108, 73, 47, 66, 46 and 27 finds an edit row of type 16 or more with this floor and the room being entered. Unless CheckAreaBan says the room is banned, it answers -255. WORLD_MAN::Enter then changes area by eventAreaNumber:

• 27 goes to field 1;
• 46 goes to field 2;
• 73 goes to field 4;
• 66 goes to field 67;
• 108 goes to field 9;
• 47 goes to field 9 on volume 2, else 10.

Block 22's area_ban field=27 dungeon=0 floor=4 block=3 closes the door after the fight.

The missing break. Case 27 calls ChangeArea(1, 1) and falls into case 46's ChangeArea(1, 2). Mutation has the same code.

• In eemu, with ChangeRequest stubbed, both run and game.field ends as 2, which block 20 would never match.
• In the game, the first ChangeArea's ChangeScene asks for ChangeRequest(6, 7). That calls ccSleepNoSleepThread(1, 1), which sleeps the calling task: the player's, inside Enter.
• The mode change deletes the task before it wakes, so the second call never runs, and the party lands on field 1.

The port must stop at the first call. The door itself, and the story rooms of types 16-35 in general, are the other thread's work.

EVENTAREAB0

GO(1) makes it for fields 1-8, whose EVENTAREA_INFO rows all have model 1 (fields 9-12 too, for EVENTAREAB8). By game.field it picks a stage: se1_5 for 1, then se2_3, se2_4, se3_2, se3_4, se4_3, se4_5, se4_7. Field 8 also loads se4_8 for NextStage. The constructor writes the field's digits into EA_MODELTABLEB0's and eventareaB0Light's se1_5 names. The rest is on the story maps page:

• nine static models;
• three background clumps;
• 20 lights from ANM_*bac1a;
• DMY_center01 as the start;
• 54 fireflies.

Draw has three things of its own:

• a scrolling cloud material;
• ob0 on refLayer, which SwitchLayer (Skeith's magic) moves to objLayer;
• ob1-ob3 bobbing by fieldrand(5) between +-50.

piney_world::evarea_b0::Arena is the port. FieldWorld holds it as Place::Arena for fields 1-8. The condition cannot be WORLD_MAN.field_model, which is still area 27's (0), so it tests the field number. piney-game --mode field:1 starts there. Area 27's WORLD_MAN is on town 1, since the field has no words.

The first shot shows the stage: floating rocks, the floor's magic circle, Kite under its green lights.

Checked

test_evarea_rs.py's ArenaAgainstGame builds the game's EVENTAREAB0 for field 1 in eemu, with the fireflies as stand-ins and fieldrand running natively from a seed. It checks:

• the models' rows, names and positions, the clumps, the lights in order and the distant light, the hit model, SetFog, eventStartPos and bgColor against evarea_probe arena;
• 600 Draws with SwitchLayer now and then: the pieces and layers, the bobbing positions, the cloud's v offset and fieldrand's seed each frame.

Everything matches. The other six evarea checks, and piney-world's tests, clippy and fmt, pass.