Entry 33

The HUD: health meter and gauges as sprites

10mrender

Filescrates/rugrats/src/hud.rsgame.rslevel2.rscrates/rugrats/examples/play_script.rs

The level's HUD sprites now draw where the port showed numbers.

Sprites (rugrats::hud, 0x8008f8f4 drawn by 0x8008f5d8):

  • A texture from the database's TEXPOS.DAT: 428 12-byte entries, read through 0x80089fa4 (n mod 428).
  • The file is 0x800b9b20[db + 1]: 0x8008a328 is called with the level plus one, and entry 0 is the menu's. The first try used [db] and got the previous database's file. Its meter happened to match; sprite 278 was empty.
  • A quad of half-size (w, h) at depth z. Its x is scaled for the 512-wide screen (512 / 320) and it is projected with the game's focal length.

Health meter (0x8008ba70, drawn by 0x8008bdf4):

  • Fill 260 (32 x 60) under the frame 258 (32 x 24), depth 768, at (192, 76) from the centre.
  • The fill's top comes down as health falls.
  • It shows for 1500 dt after a change, on levels 2-6, 9, 12, 14 and 16.

Gauges (0x8008c5e0, drawn by 0x8008c394):

  • Back 282, then the fill, half-size 64 x 64 at depth 1024.
  • Level 2's court: the goose's (278) at (-200, 88) and Chuckie's (279) at (200, 88).

Checked in pictures: the bottle meter at reduced health, and the goose's and Chuckie's portraits on the court in phase 3.

Still unknown
  1. Where 0x8008fa9c puts each piece of a multi-part sprite. The meter's cap sits on the fill's full top here.
  2. How a gauge's fill shows damage; at full health it cannot be seen.