Entry 233

The class 10 emitters as the original's: their clocks, schedule and callbacks

2026-10-181h 57mengine

The class 10 objects (think 0x8004e0f4) now run in the port as the original's: their clocks, their schedule and every callback the levels use, each launch checked against the oracle.

The think. A class 10 object is on the trigger list with its own enter (0x8004cfd8: record +0x00 = 1, scheduled) and leave (0x80049e5c). While scheduled, each think starts its clock (+0x64 from VSync(-1)) after an enter or a go, and goes when the count is past it by more than the period (template +0x18, VSyncs). 969 and 982 hurt the player first when near (0x900000 / 0x400000 squared), which replaces level 6's stand-in bursts. The class 10 enter is set after the set-up's speech line, so it wins over a talker (level 6's 905 at LP 46 had one, and went 25 frames early).

The callbacks (0x800b7eb0 by template +0x09), in world::game::emitters:

• 2 (577) and 10 (982): count drops at random speeds, the object's matrix less its third row;
• 3 (611): sound 149, a drop that sounds 133 (177 in level 16) and leaves mark 263;
• 4 (614): spinning model 931;
• 5 (615): one of six sprites;
• 6 (616, 1139): bubbles, and the shared count 0x800c4ba0's sounds;
• 7 (706): model 1040 down, sound 147, mark 218;
• 9 (682): model 1016, mark 212;
• 13 (969): six sprites, a random cone, the period as a delay;
• 14 (905) and 15 (906-908): a model along the object's matrix (0x8009f6f8);
• 18 (1215): model 1628, bounce 2500.

Each has its own seed (0x800c41a8..0x800c41c8, 0x800c41d8, all 48732). A launch now carries its sound (+0x64) and mark (+0x46, +0x65..+0x68). The flights play the sound where they meet something (0x80087594); the marks are kept but not drawn.

What the oracle showed besides:

• The update list (0x800c43b8) is head-inserted and walked from the head, so the latest scheduled thinks first. Level 6's 969 and 982s going in one frame draw their cones in that order.
• The think reads VSync(-1) during the frame. In npc_check's frames that is the frame-end count less one, so the port's think reads Game::vcount less one.
• Flights::launched is now cleared each frame; it grew without end outside the tools.

Tools.

• npc_check FLIGHTS=1 compares every launch, the model kinds without their unset sprite and size, and with sound and mark.
• It syncs the emitters' clocks, schedules and order, the trigger cursor and the seeds at the first sync frame (SYNCAT=1 avoids the boot's half frame).
• EMITDBG=1 prints both sides' clocks.

emitters_launch_as_the_original runs five places in levels 29, 1, 3 and 6: 156 launches, all the original's.

gameplay.md has "Emitters (class 10, 0x8004e0f4)". Levels 1, 4, 6 and 7 and objectives.md are updated.