A_Lower

A_Lower is a code pointer used in the weapon lower animation for all weapons.

A_Lower moves the Y position of the weapon sprite towards the bottom of the screen by a small amount each time it is invoked. If the bottom of the screen is reached, the next weapon is selected and the raise state is invoked to bring it up. A_Lower is usually used in a state that is an infinite loop that repeatedly jumps back to itself; the loop terminates when the weapon has finished lowering.

Uses

The A_Lower code pointer appears in the following states in Doom's state table:

Frame number	Doom internal name	Use
3	S_PUNCHDOWN	weapon lower animation for the Fists
11	S_PISTOLDOWN	weapon lower animation for the Pistol
19	S_SGUNDOWN	weapon lower animation for the Shotgun
33	S_DSGUNDOWN	weapon lower animation for the Super Shotgun
50	S_CHAINDOWN	weapon lower animation for the Chaingun
58	S_MISSILEDOWN	weapon lower animation for the Rocket Launcher
69	S_SAWDOWN	weapon lower animation for the Chainsaw
75	S_PLASMADOWN	weapon lower animation for the Plasma Gun
82	S_BFGDOWN	weapon lower animation for the BFG 9000

Example

The following is an example of how to set the A_Lower code pointer in a Dehacked file:

Pointer 21 (Frame 34)
Codep Frame = 82

Or using BEX syntax:

[CODEPTR]
Frame 1234 = Lower

External links

• A_Lower in the Doom source code.
• A_Lower at the ZDoom wiki
• Lower at the Eternity Engine wiki