make an entity move forwards

[ocean atlas]

in trying to make a projectile always move forwards(when I summon a projectile) how do I do that?

[hybrid vine]

Use get ViewDirection and then calculate the dx dy dz and move it my dx dy dz a little bit each time, when I’m home I’ll send a script

[ocean atlas]

yes

[obsidian temple]

Wait, can you move any entity with script-api

[hybrid vine]

i think so

[obsidian temple]

That means we can make real car racing in minecraft

[hybrid vine]

yh

[obsidian temple]

How

[hybrid vine]

Use get ViewDirection and then calculate the dx dy dz and move it my dx dy dz a little bit each time

[obsidian temple]

[hybrid vine]

or just use applyKnockback

[obsidian temple]

I mean what is the operation

[hybrid vine]

coz otherwise u gotta code collision as well

[obsidian temple]

Entity. What

[hybrid vine]

i just used tryteleport

[obsidian temple]

Ohhhh

That would be buggy

Will stick to knockback

[hybrid vine]

nah it works rlly well with no performance loss

[ocean atlas]

how do I begin with viewdirection

[hybrid vine]

player.getViewDirection()

[ocean atlas]

that will make the projectileb always move forwards?

[hybrid vine]

no

that will get the view direction

[ocean atlas]

how do I make it always move forwards , im confused

[hybrid vine]

you need to use some maths with vec3's

.getViewDirection() returns a vec3

[ocean atlas]

Idk how to do that

[hybrid vine]

umm

dms?

[ocean atlas]

uh sure

[drowsy haven]

Just use applyImpulse

I did so for my custom dragon behavior

[ocean atlas]

how

[drowsy haven]

@ocean atlas wait how are you summoning the projectile?

[dark shale]

player.dimension.spawnEntity('id:name', player.location)

[drowsy haven]

Okay but what is triggering that?

[dark shale]

the player

[drowsy haven]

That doesn't really help...

[sage tundra]

what event are you using

[drowsy haven]

Is the player using an item or something?

[sage tundra]

// Assuming you have a player stored to `player`
// Assuming you already summoned your entity and stored it to `entity`

const dir = player.getViewDirection();
entity.applyImpulse(dir);

note: this will only apply once so it will be affected by gravity and such, if you need to make the effect last longer, you'll need a runInterval

if you're using a projectile, it would be better to use the projectile component with shoot instead of applyImpulse

const dir = player.getViewDirection();
const projComp = entity.getComponent("projectile");
projComp.shoot(dir);

[dark shale]

function shooter(entity, projetil, launcher) {
    const velocity = {
        x: entity.getViewDirection().x * launcher,
        y: entity.getViewDirection().y * launcher,
        z: entity.getViewDirection().z * launcher
    };
    const location = {
        x: entity.location.x + entity.getViewDirection().x * 5,
        y: entity.location.y + 1,
        z: entity.location.z + entity.getViewDirection().z * 5
    };
    let proj = entity.dimension.spawnEntity(projetil, location);
    proj.clearVelocity();
    proj.getComponent('minecraft:projectile').shoot(velocity);
    proj.getComponent('minecraft:projectile').owner = entity;
}
world.afterEvents.itemUse.subscribe((event) => {
    const item = event.itemStack;
    const player = event.source;
    if (item.typeId == 'stek:fire_gun') {
        shooter(player, 'stek:fire', 2)
    }
})

if the entity has the 'projectile' component, this works

launches a projectile from the player's view

[sage tundra]

I advise storing repetitive things to variables, calling APIs like that has overhead. It's usually not a problem for small things, but it can have a heavy performance impact at scale

[dark shale]

I stored it in variables

[sage tundra]

function shooter(entity, projetil, launcher) {
    const entityLocation = entity.location;
    const viewDirection = entity.getViewDirection();
    const velocity = {
        x: viewDirection.x * launcher,
        y: viewDirection.y * launcher,
        z: viewDirection.z * launcher
    };
    const location = {
        x: entityLocation.x + viewDirection.x * 5,
        y: entityLocation.y + 1,
        z: entityLocation.z + viewDirection.z * 5
    };
    let proj = entity.dimension.spawnEntity(projetil, location);
    const projComp = proj.getComponent('minecraft:projectile');
    projComp.shoot(velocity);
    projComp.owner = entity;
}

clearVelocity is also unneccessary as the entity just spawned and has no velocity

[dark shale]

Sometimes it bugged, I don't know why, after I added clearVelocity() it went desbugged.

Sorry for the English, I'm Brazilian

[ocean atlas]

I want to summon the entity with commands and use scripts to launch forwards

[ocean atlas]

what is the shooter(player,'stek:fire',2) for ?

[dark shale]

launches the entity

[ocean atlas]

the entity is called stek:fire ?

[drowsy haven]

With commands?

[ocean atlas]

commands are easier for me , I only want the entity to be launched forwards even if only once

[dark shale]

yes

[ocean atlas]

if I don't use the itemuse.subscribe stuff will the projectile shoot forwards when it is summoned ?

[dark shale]

the important thing is to execute the function

[ocean atlas]

will this work ?

import { Entity } from '@minecraft/server';

function shooter(entity, projetil, launcher) {
    const velocity = {
        x: entity.getViewDirection().x * launcher,
        y: entity.getViewDirection().y * launcher,
        z: entity.getViewDirection().z * launcher
    };
    const location = {
        x: entity.location.x + entity.getViewDirection().x * 5,
        y: entity.location.y + 1,
        z: entity.location.z + entity.getViewDirection().z * 5
    };
    let proj = entity.dimension.spawnEntity(projetil, location);
    proj.clearVelocity();
    proj.getComponent('op:projectileslash_bullet').shoot(velocity);
    proj.getComponent('op:projectileslash_bullet').owner = entity;
    }
})```

[dark shale]

I didn't understand what you wanted to do

[ocean atlas]

gonna use commands to summon the entity and a separate script to make the entity go forwards

[drowsy haven]

Let me see your command

[ocean atlas]

there's nothing wrong with it , in good with commands I just want to know if the script works