This is a list of gear messages. Gear messages are used to e.g. control hedgehogs.

List of gear messages

Identifier	Meaning	Parameter
`gmLeft`	Walk left	Not used.
`gmRight`	Walk right	Not used.
`gmUp`	Aim up	Not used.
`gmDown`	Aim down	Not used.
`gmSwitch`	Switch hedgehog	Not used.
`gmAttack`	Attack	Not used.
`gmLJump`	Long jump	Not used.
`gmHJump`	High jump	Not used.
`gmSlot`	Weapons slot selected.	Used.
`gmWeapon`	Weapon seleced.	Used.
`gmTimer`	Timer set.	Used.
`gmAnimate`	Start animation	Used.
`gmPrecise`	Precise	Not used.
`gmDestroy`	Request gear to remove itself. If present, the gear's removal and cleanup routine will be called.	Not used.
`gmDelete`	Delete gear the “hard” way. The gear removal routine will be skipped. Use with care!	Not used.
`gmRemoveFromList`	Remove from gear list	Not used.
`gmAddToList`	Insert in gear list	Not used.
`gmAllStoppable`	Bitwise OR of `gmLeft` , `gmRight` , `gmUp` , `gmDown` , `gmAttack` and `gmPrecise`	Not used.

gmAddToList and gmRemoveFromList are intended for use by the engine when changing order of gears in the list. It is not recommended that Lua changes these, and at present they are used together when changing a gear's Z (drawing order). For example, if Lua sets gmRemoveFromList , it would cause a leak of the gear, since Lua would no longer be able to restore it. Setting both together would have no effect since Lua cannot at present change Z.

See https://hg.hedgewars.org/hedgewars/file/default/hedgewars/uConsts.pas (search for "gear messages") for a current list.