49  Item Definitions

This tour examines weapon definitions in DOOM, showing the weaponinfo_t struct and weaponinfo array that define ammo types and animation states.

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doomdef.h - Lines 200–210: ammotype_t enum defines the ammunition types: bullets, shells, rockets, cells, and am_noammo. - Lines 190–195: NUMWEAPONS enum defines the total number of weapon slots in the game.

d_items.h - Lines 34–43: weaponinfo_t structure defines each weapon’s ammo type and state indices (raise, lower, ready, fire, flash). - Line 45: weaponinfo array stores all weapon definitions.

d_items.c - Lines 47–56: Defines the fist weapon using am_noammo and associated animation states. - Lines 58–66: Defines the pistol weapon using am_clip, with entries for all animation states.

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49.1 Pattern Summary

Each weapon entry in weaponinfo: - Specifies the ammo type (ammotype_t) - Defines five state indices: - Raise - Lower - Ready - Attack - Flash

This enables precise animation and ammo control per weapon.

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And that’s it! Each weapon in DOOM pairs its ammo type with five animation states that control how it moves and fires.