Entry 319

"The Gott statue's ring stayed: a character's draw ignored its objects' animated transparency"

2026-10-01render

Filescrates/piney-world/src/body.rscrates/piney-world/src/foe.rscrates/piney-game/src/session/tests/side_events.rs

Issue #19 (INF, the tutorial dungeon, event 4 TEACH-D): after the Gott statue falls, its yellow ring stays in the room. A player's video showed the same thing on that day's build.

Not the effects

First I ruled out the effects. Kite opened the statue in point 5's room (block 7 run, the item window shut). From then on:

• the glow effStatueOfGod: its generators end at the frame effsw goes 0 (ccGimIdol::main, gcmn 0x00459bfc). The census counts them now (effsw_generators);
• the particles: 218 just after the opening, the room's usual 4-5 within a few hundred frames;
• the box's rays (ccPrimRadiate): they grow, shrink and switch off.

The model

The ring is part of the statue's own model: OBJ_o_magic_m0_ in xgs?bod1.cmp (MAT_mag1, TEX_xgs?mag1). The fall clip ANM_xgs?dwn0 (141 frames) and the open clip ANM_xgs?nut1 key its transparency to 0. The fall also fades both treasure objects, OBJ_o_treasure_m0_ and _m1_, to 0: tools/anim.py pose, checked against the game's code by tools/test_anim.py.

ccAnm::Draw (main 0x001524d0) multiplies each node's ccCoord::_GetTransparency (main 0x00138490) into its models: the node's own animated transparency times its parents'.

The enemies' model draw (foe.rs, Model::node_alphas) already did this. Body::draw, which draws every character and gimmick actor (the statue among them), gave each object the actor's one transparency. So the ring and the lid stayed drawn after the fall.

parents and node_alphas now live on Body, and Model's call them. Body::draw multiplies each node's value in. Attached models (the blades) keep their own.

Test

the_tutorial_statue_s_glow_ends plays to the statue's room with the story pilot and opens the statue as a player does. Then it checks two things:

• no effsw-switched generator lives after the switch drops;
• the room drawn 600 frames on has the ring's band free of yellow.

Without the fix it counts 4,478 yellow pixels there. With it, under 200. The piney-world and piney-game suites pass.