Generic event for entity movements

[yocontra]

Is there a way to listen for all entity changes? I'm trying to make a radar in the browser (synced over websockets) that updates any time a player moves, a player joins, a mob spawns, a mob moves, a player leaves, etc.

I can listen to all of these events on their own but it seems like a generic event that gets triggered after all relevant entity changes would be useful

[andrewrk]

Could you propose an event name and what arguments it would receive?

[yocontra]

Maybe this could be better implemented as a radar plugin... it seems specific to that use case

Here is my code right now for a basic CLI radar

client.on 'entitySpawn', (entity) ->
  return unless entity.type is 'player'

  for uname, p of client.game.players when p.entity
    x1 = client.entity.position.x
    y1 = client.entity.position.y
    z1 = client.entity.position.z

    x2 = p.entity.position.x
    y2 = p.entity.position.y
    z2 = p.entity.position.z

    x3 = Math.abs (x1-x2)^2
    y3 = Math.abs (y1-y2)^2
    z3 = Math.abs (z1-z2)^2

    prem = x3+z3#+y3
    dist = Math.floor Math.sqrt prem
    console.log "#{uname}: #{p.entity.position} - #{dist}"

[andrewrk]

I think you just want to listen to entitySpawn, entityMoved, and entityGone.

Note that you can tell when players join and leave but you do not know their coordinates unless they are within range of your bot.

[andrewrk]

When a player comes in range of your bot, you'll get entitySpawn. From that point on you'll get entityMoved updates until you receive an entityGone event. I'll keep this issue open until I add this info to the docs.

[yocontra]

Any chance of getting a distance property on the entity object? I have the calculations in my code above - uncomment the y3 if you want to take the y axis into account

[yocontra]

Looks like https://github.com/superjoe30/node-vec3/blob/master/index.js#L81 does a better job - I'll use the built in functionality

[andrewrk]

Points are all instances of vec3 (See https://github.com/superjoe30/mineflayer/blob/master/doc/api.md#mineflayervec3)

So yes, you can do client.entity.position.distanceTo(p.entity.position).

[andrewrk]

Feel free to make pull requests to vec3 if you want more vector functions :)

[yocontra]

Solves my issue - thanks!