Facing 180° Angle

[glacial lark]

I need my block to spawn projectile in which it faces, which varies the number of projectile summoned to a 180° relative to its facing direction. I use .applyImpulse() to my entity and i dont know how to relate the xyz to the block face.

this post was made using microsoft word

[long bough]

how are you determining the block face?

[glacial lark]

world.beforeEvents.playerInteractWithBlock.subscribe((e) => {
  if (e.block.typeId !== "trap:dispenser") return;
  let blockLocation = e.block.location;
  blockLocation.x += 0.5; //to offset middle of the block
  blockLocation.z += 0.5; //to offset middle of the block
  var num = 5 //number of projectiles

  for (let i = 0; i < num; i++) {
    let projectile = e.block.dimension.spawnEntity('trap:arrow',blockLocation)
    //idk what to do anymore
    projectile.applyImpulse({ x: ??, y: 0.5, z: ??})
  }
}
)

[long bough]

do you have a bundler setup to use external packages or are you just using plain scripts?

[glacial lark]

yeah, with also making the xyz to be relatively to where it faces, like disregarding the default X and Z whenever it faces north, west, etc

[glacial lark]

im just using plain scripts, are there bundlers i can use?

im very bad at these maths

[long bough]

#1223546390433497108 message

there's that post that shows how to use a bundler

as for what package I recommend using for math, @bedrock-oss/bedrock-boost

[glacial lark]

oh, i need npm packages, i don't know much about npms, i only know javascript and im no IT myself, i cant even install minecraft dependencies on my projects other than copying and pasting the node_modules folder for type definitions xd

[glacial lark]

yawqna

[glacial lark]

still need help with diz

[solid shadow]

try to determine direction of your projectile with: let dir = Vector3.Normalize(Vector3.Subtract(e.faceLocation,e.block.location))
then: projectile.applyImpulse(dir) or projectile.applyImpulse(new Vector3(-dir.x,-dir.y,-dir.z)) or projectile.applyImpulse(new Vector3(-dir.x,dir.y,-dir.z))

this should fire projectile infront of a block

[glacial lark]

okay, thanks, im stupid on these vector things, let me see if i got this working

thank you

[solid shadow]

same ^^
tbh i would help you with how to fire other projectiles but i have no idea how to rotate vector

[somber badge]

solved ?

[glacial lark]

not yet

still need help with it

how would I applyImpulse using an angle?

[somber badge]

how do you you indentify block facing

[glacial lark]

let facing = e.block.permutation.getState("minecraft:cardinal_direction")
//returns north, south, east, west

[somber badge]

@glacial lark ```
let east = [-1,0,0]
let west = [1,0,0]
let north = [0,0,1]
let south = [0,0,-1]

let face // code

let baseAngle = ({
east: 0,
south: 90,
west: 180,
north: 270
})[face]

let da = 180 / 5

function fromAngle (pitchRad, yawRad, distance = 1) {
let sinYaw = Math.sin(yawRad)
let sinPitch = Math.sin(pitchRad)
let cosYaw = Math.cos(yawRad)
let cosPitch = Math.cos(pitchRad)

return {
    x : distance * -sinYaw * cosPitch ,
    y : distance * -sinPitch ,
    z : distance * cosYaw * cosPitch
};

}

for (let i = 0; i < 180; i += da) {
let dir = fromAngle( 0, i * (Math.PI / 180) )
let scaler = 2

dir.x *= scaler
dir.y *= scaler
dir.z *= scaler

// apply impulse 

}```

[glacial lark]

what does those direction variables do? it doesn't seem to be used in the code

[somber badge]

yea i was doing somethin else but switched to simple solution xd

[long bough]

don't you need to convert the angle to rad before passing into fromAngle?

i seems to be in deg

[somber badge]

oh yes