Entry 218

Carmina Gade and its airship

2026-09-27volumes

Filescrates/piney-world/src/town03.rscrates/piney-world/src/town.rscrates/piney-effect/src/dust.rscrates/piney-game/src/world.rscrates/piney-game/src/start.rscrates/piney-game/src/session/tests/survey.rs

Mutation's M215 opens in Carmina Gade, the third Root Town (game.town 2), and players go there from M203 on. The port had only Mac Anu and Dun Loireag. Carmina Gade is now town03.rs: ROOTTOWN03 as Mutation's executable has it.

Infection's executable also has a ROOTTOWN03, but it is an earlier build that no disc reaches. Mutation's is larger in every function: the constructor grows from 3660 to 4184 bytes, Draw shrinks from 796 to 592, and DrawMap grows from 4016 to 5184. The port follows Mutation's.

The town

• The constructor.
  • The file is town03, or town03d in crisis.
  • It makes 34 STATICMODELs from RT_MODELTABLE03 and no static objects, so a class's object table is now optional.
  • The lights come from ANM_sr3bac1a by town03Light: LGT_sr3lig1 and 11 omnis.
  • The fog is SetFog(3000, 15000, 0, 85), and the fog and the background share the colour 0x0014140c.
  • Four background clumps: two skies and two mountain ranges.
  • Three waters, of which only the first is ever drawn.
• Draw.
  • Water 0 and its copy, on objLayer.
  • The airship.
  • DrawBG: the four clumps on bgLayer[0]-[3], and in crisis three more on bgLayer[4]-[6], with the scrolling materials.
  • On obj2Layer (not objLayer, as in Dun Loireag): the rows by pass, then rows 29-33 and the type-0 rows below 29, both with STATICMODEL::DrawWithOutFog.
• The layers. WORLD_MAN::GO's bgLayer priorities, read from Mutation's code: -100, -90, -80, -70, -60, -50, -45, -40, -35 and -30.
• Left out.
  • The BLT chunks (ccBltGrpChunk) only load textures into the GS.
  • u$1875 is stepped but nothing reads it.

The airship

AIRSHIP (0x0043af10; Move 0x0043b0c0) flies between DMY_marker69 and 72 and back, in six legs:

• A leg takes 2000 frames: its t grows by 0.0005 in single floats, which stays just below 1 at the 2000th step.
• The ship then turns for 300 frames to the next heading, by pi/300 or pi/600 a frame, and waits 300 frames.
• Its model is set 500 below its place (SetMatrix_PosRotXYZ), before it moves that frame.
• It puffs from two chimneys every 6 to 13 frames (fieldrand) while it flies and while it waits.
• While it waits, each pair of puffs sounds SE 257 (ccSeOn3D).

The puffs are effSmokeN, which is effSmoke with the particle's distSW cleared (dust::eff_smoke_n). A town's draws now queue their effects and sounds (TownEvent), and the session drains them after the draw (World::take_town_events).

Checks

• town03's tests:
  • the constructor's pieces;
  • the draw order;
  • the first leg ending between frames 2000 and 2010 at marker 70, with the puffs made.
• mutation_story_starts_open_their_event passes: M215 opens in Carmina Gade with the party empty.
• piney-game: 126 passed, 0 failed, 60 ignored. The town02 and particle harnesses pass against the game.
• mutation_story_survey (4000 frames each):
  • no panic, and no host call left at its default;
  • M215 plays its opening in Carmina Gade;
  • M216 plays the ending stream (35);
  • the desktop and board starts idle, as the autopilot drives only The World. M208 waits on its info_now windows.