Entry 89

The box toss arrow and lob

2026-10-1512mplay

Filescrates/rugrats/src/levels/box_toss.rs crates/rugrats/src/ui/hud.rs crates/rugrats/tests/play.rs docs/levels/level-20.md

Worklog 46 left two stand-ins in levels 20 and 21: a small marker for the arrow over the target, and a lob fitted to land on the baby.

The arrow (0x80031a28). It is drawn for the object in 0x800e2d3c (the target) in levels 20-21, from the character draw (0x8003205c). It is not a model: it queues a camera-facing quad (0x8008afc4, drawn by 0x8008a954) with:

• face flags 0x800c4004 = 0xd0800000, read in the oracle: top bits 3 with bit 23 and not 24 or 29, so 0x800233f4, an opaque FT4;
• half-size 500 x 900 (0x800c4008), turned 2048, so the sprite points down;
• the texture at the level's TEXPOS table + 0x1110, entry 364 of the 12-byte entries (the menu table 0x800b9ba4 if none is loaded);
• its centre max(|+0x7a|, |+0x82|) + 400 (0x800c400c) above the target. +0x78..+0x84 is the bounds cube 0x80046570 sets. Peeked in the oracle on level 20, it is +-1773 for Angelica and all four babies, so the arrow sits 2173 up;
• grey 208 while the flip counter 0x800c3f24 mod 10 is under 5, else 128.

Sprites::billboard_lit draws a billboard with that grey. The port's shot shows the yellow arrow pointing down over the baby in front.

The lob (0x80057bc4). It runs from the target picker (0x80059b34) in levels 20-21 each frame a target is held, and fills player +0x200..+0x20c:

• direction (0, -2048, 2048) turned toward the target and made unit, so 45 degrees up;
• speed isqrt(s * 0x180000 / 4095) with s = 20 (d - 1024) >> 10, in unsigned 32 bits, d the flat distance. 4095 is 2 sin 512 cos 512 >> 12.

The throw (0x80060b44) passes those to the flight in place of the plain throw's (0, -384, 1024) and 170, so velocity = dir * (speed * 65536 / 6000) >> 12 as for every throw. A new test lobs from 2500, 5000 and 8000 away; each reaches a baby and swaps the player into it.