Entry 159

The elevator stays down; a spinner turns about its own upright

2026-10-1625mplay

Filescrates/rugrats/src/world/game/movers.rsmod.rstoys.rscrates/rugrats/tests/play.rs

Two of worklog 158's guesses checked on the oracle; both were the port's.

Level 5's elevator stays down while ridden. The oracle, Angelica jumped onto it at (65540, 8708) at frame 3600 and left alone: the elevator from y -4578 down to 7722 by 4100, and there still at 5600, she at 6739 on it. The port took her back up: its think ended at the bottom (every axis done) and, ridden, a ridden-only mover was armed again every frame, each arming turning the done axes. In the original arming is 0x8004f228, called on landing (from 0x80062894; teleporting onto it does not set +0xf8, a landing does), and at the bottom 0x8004ee00 asks 0x8004ed00, which answers 0 while ridden: the think ends (-1) and nothing arms it again. Mover::rode keeps the last frame's riding; a ridden-only mover arms on the frame riding begins. Test level_5s_elevator_stays_down_while_ridden_as_the_original holds the oracle's numbers (7722, 6739), the walking test steps off at the bottom.

A spinner's box turns as the original's. The oracle, Tommy run east along z 4290 at level 3's tipped toy (LP 143, template 526, class 2) at four phases of its turn: never stopped (x 170 a frame through 73600). The port stopped him at 69860 every time. Its think (0x8004e2ac, dumped by a hook on the oracle) adds the turn to the object's own angles: +0x24 rises 70 a frame (template +0x18 = 35 a VSync) while +0x28 holds -1024 (its placement); the collision (0x80069c40) and drawing make the matrix from the angles together (0x80020ee0 = Trig::euler). M(a, 0, c) = M_c M_a, so the spin turns about the toy's own upright and its height stays 692..968. The port had turned the placement by the spin (the other order): the box swept up and down through Tommy. Spinner::rot now takes the placement's angles from its matrix (placed_angles), adds the turn, and makes one matrix; level 3's toy keeps its height, and the run goes on as the oracle's, frame for frame in x.

The object collision itself, read on the way: 0x80065210 tests five segments of the body's centre line (up to the body box's top, along the step there, down to its bottom capped by +0x68, along the step there, and the end's top to bottom) against each model box of the objects in the nearby list (+0x100: the objects of the player's room and its portals' rooms whose cylinder meets his, 0x8006add8, those without +0x00 0x80000), template flag 8 skipped, at the object's angles now. The port's footprint-and-height test stands in for it.