Difference between revisions of "A Lower"
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* {{DoomSrc|file=p_pspr.c|line=385|text=A_Lower}} in the Doom source code. | * {{DoomSrc|file=p_pspr.c|line=385|text=A_Lower}} in the Doom source code. | ||
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Revision as of 18:16, 16 March 2020
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.
