Grappling hooks

Hook items go in the Curios hook slot (item tag #curios:hook). The hook key (default H) fires a hook where the player looks. It latches onto the first block it meets, pulls the player there and holds them; jumping lets go. Firing again adds hooks up to the item's count (the oldest goes first). A latched player takes no fall damage.

File: data/<ns>/fundamentum/hooks/<name>.json, keyed by item. Every field is optional.

{
  "item": "mymod:ivy_hook",
  "range": 18,
  "shoot_speed": 1.5,
  "pull_speed": 0.7,
  "count": 1,
  "texture": "mymod:textures/entity/ivy_hook.png",
  "still": false,
  "air_seconds": 0
}

Field	Default	Meaning
item	the file id	the hook item
range	18	blocks
shoot_speed	1.5	blocks per tick
pull_speed	0.7	blocks per tick
count	1	hooks out at once
texture	Fundamentum's	repaints the hook and chain, in the layout of fundamentum:textures/entity/hook/hook.png
still	false	holds the player exactly between the latched hooks, without the usual give (two hooks on facing walls hang them in the air)
air_seconds	0	above 0, a hook that reaches its range without meeting a block anchors in the air there for that long