Develop Reference

Setting the position of a text geometry?

I have looked through stack overflow and google and I have found how to CENTER a text geometry but that is not what I want to do.
I have a scene that just has a block of text that says "Buy Here!". Using the documentation in the three.js website and examples here I was able to do that after some struggling. I had some trouble finding out how to refer to that mesh since I had created the geometry inside a function, and it took hours for me to know about setting a name for it as a string so it can be accessible from different parent/child levels.
What I am NOT able to do now is to offset the text by some arbitrary number of units. I tried shifting it down by 5 units. No matter how I try to do it it isn't working. I either manage to make the text geometry disappear OR my whole scene is black.
Here is my code...
I have the basic scene setup working properly and I'll include it here but feel free to skip since I'm pretty sure this has nothing to do with the issue...
import './style.css'
import * as THREE from 'three';
import { OrbitControls } from 'https://cdn.jsdelivr.net/npm/three#0.117.0/examples/jsm/controls/OrbitControls.js';
import TWEEN from 'https://cdn.jsdelivr.net/npm/#tweenjs/tween.js#18.5.0/dist/tween.esm.js';
//BASIC SCENE SETUP
const scene = new THREE.Scene();
const camera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 0.1, 1000);
const renderer = new THREE.WebGLRenderer({ antialias: true });
renderer.setSize(window.innerWidth, window.innerHeight);
renderer.setPixelRatio(window.devicePixelRatio);
document.body.appendChild(renderer.domElement);
//LIGHTS (POINT AND AMBIENT)
const pointLight = new THREE.PointLight(0xFFFFFF);
pointLight.position.set(5, 5, 5);
const ambientLight = new THREE.AmbientLight(0xFFFFFF);
scene.add(pointLight, ambientLight);
//RESIZE WINDOW
window.addEventListener('resize', () => {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize(window.innerWidth, window.innerHeight);
render();
}, false);
//ORBIT CONTROLS
const controls = new OrbitControls(camera, renderer.domElement);
controls.minDistance = 5;
controls.maxDistance = 70;
controls.enablePan = false;
controls.enableRotate = false;
controls.enableZoom = false;
controls.target.set(0,0,-1);
camera.position.setZ(25);
window.addEventListener("click", (event) => {
onClick(event);
})
window.addEventListener("mousemove", onMouseMove);
var animate = function() {
requestAnimationFrame(animate);
controls.update();
render();
TWEEN.update();
};
function render() {
renderer.render(scene, camera);
}
animate();
and here is my code for the text object....
var loaderF = new THREE.FontLoader();
loaderF.load( 'https://threejs.org/examples/fonts/optimer_regular.typeface.json', function ( font ) {
var geometry = new THREE.TextGeometry( 'Buy Here!', {
font: font,
size: 2.3,
height: 0.1,
curveSegments: 15,
bevelEnabled: true,
bevelThickness: 0.5,
bevelSize: 0.31,
bevelSegments: 7
} );
geometry.center();
var material = new THREE.MeshLambertMaterial({color: 0x686868});
var mesh = new THREE.Mesh( geometry, material );
mesh.name = "bhText"
scene.add( mesh );
mesh.userData = { URL: "http://google.com"};
} );
Here's what I have tried.....
under "var geometry ({...});" I typed....
geometry.position.setX(-5);
but the text object disappears completely so I tried
geometry.position.setX = -5;
but there was no difference so i tried taking out
geometry.center();
but it had the same results.
So then I tried using
mesh.position.x = -5;
with AND without
geometry.center();
but again, they all just make my text object disappear.
So now I tried to set the position from outside the function by typing the following code OUTSIDE of everything that is contained in
loaderF.load ('https.....', function (font){var geometry = .....})
using the reference I learned....
scene.getObjectByName("bhText").position.x(-5);
but this makes my entire scene go blank (black). So I tried variations of like
scene.getObjectByName("bhText").position.x = -5;
scene.getObjectByName("bhText").position.setX(-5);
scene.getObjectByName("bhText").position.setX = -5;
mesh.position.setX = -5;// I was pretty sure this wasn't going to work since I wasn't
//using the mesh name specifically for when it's inside something
//I can't reach because of parent-child relations
and again trying each of those with AND without
geometry.center();
but they all made my scene go black.
I just wanna move it down a couple of units. Sheesh.
Could anyone be kind enough to tell me WHERE in my code I can set the position of the text geometry? Thank you please.

I just wanna move it down a couple of units.
In this case use mesh.position.y = - 5;. Changing the x coordinate will move the mesh to the left or right. Here is a complete live example based on your code:
const scene = new THREE.Scene();
const camera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 0.1, 1000);
camera.position.set( 0, 0, 10 );
const renderer = new THREE.WebGLRenderer({
antialias: true
});
renderer.setSize(window.innerWidth, window.innerHeight);
renderer.setPixelRatio(window.devicePixelRatio);
document.body.appendChild(renderer.domElement);
const pointLight = new THREE.PointLight(0xFFFFFF);
pointLight.position.set(5, 5, 5);
const ambientLight = new THREE.AmbientLight(0xFFFFFF);
scene.add(pointLight, ambientLight);
const loader = new THREE.FontLoader();
loader.load('https://threejs.org/examples/fonts/optimer_regular.typeface.json', function(font) {
const geometry = new THREE.TextGeometry('Buy Here!', {
font: font,
size: 2,
height: 0.5
});
geometry.center();
const material = new THREE.MeshLambertMaterial({
color: 0x686868
});
const mesh = new THREE.Mesh(geometry, material);
mesh.position.y = - 1; // FIX
mesh.name = "bhText"
scene.add(mesh);
renderer.render(scene, camera);
});
body {
margin: 0;
}
<script src="https://cdn.jsdelivr.net/npm/three#0.130.1/build/three.min.js"></script>

Cant get Scene to render in Three.js

I'm pretty new to three.js and I can't seem to get my scene (or camera) to render. The other parts are working (I am able to render my adobe illustrator vectors that I converted just fine), however if I comment out my scene, camera & renderer code it makes no difference to what's rendered in the browser.
Here is my html:
<canvas id ="slot">
</canvas>
Here is my js:
var c = document.getElementById('slot');
c.height = 282;
c.width = 400;
var cx = c.getContext('2d');
//This doesn't appear to be working ...
var scene = new THREE.Scene();
var camera = new THREE.PerspectiveCamera( 75, window.innerWidth/window.innerHeight, 0.1, 1000
);
var renderer = new THREE.WebGLRenderer();
renderer.setSize( window.innerWidth, window.innerHeight );
document.body.appendChild( renderer.domElement );
//Working just fine
cx.fillStyle="rgba(255,255,255,0)";
cx.fillRect(0,0,1,1);
cx.fillRect(1,0,1,1);
//....(goes on and on)
var slot = new THREE.Mesh(cx);
// GridHelper
var size = 10;
var divisions = 10;
var gridHelper = new THREE.GridHelper( size, divisions )
// Light
var light = new THREE.AmbientLight(0x404040);
// Fog
var fogColor = 0xFFFFFF;
var near = 10;
var far = 100;
var fog = new THREE.Fog(fogColor, near, far)
scene.add(slot, gridHelper, light, fog)
camera.position.z = 5;
renderer.render( scene, camera );
any help would be greatly appreciated

I have prepared a jsFiddle with your corrected code.
https://jsfiddle.net/EthanHermsey/qampc5b1/49/
var renderer = new THREE.WebGLRenderer({antialias: true});
var cTexture = new THREE.CanvasTexture( c );
var slot = new THREE.Mesh(
new THREE.PlaneGeometry(2, 2),
new THREE.MeshBasicMaterial({
map: cTexture,
transparent: true
})
);
scene.add(slot);
scene.fog = new THREE.Fog(fogColor, near, far);
You cant initialize a Mesh like that.
You have to add the canvas as a CanvasTexture to a material.
You cant .add() fog to the scene, it is like this: scene.fog = new THREE.Fog().
This is what gave the error message.
I don't think you can add multiply objects to the scene like that. (but i'm not sure)
Added antialias to the render (makes edges smoother).

three.js - How to set camera position?

I'm pretty beginner in three.js and webgl programming. so I have created a box in three.js and its working fine but the problem is when I set camera position in z axis(eg: camera.position.z = 2; ) the box just disappears. could anyone explain me why is it happening and how can I properly set the position of the camera?
try uncommenting the camera.position.z = 2; in the fiddle
function init() {
var scene = new THREE.Scene();
var box = getBox(1, 1, 1);
scene.add(box);
var camera = new THREE.Camera(45, window.innerWidth/window.innerHeight, 1, 1000 );
//camera.position.z = 2;
var renderer = new THREE.WebGLRenderer();
renderer.setSize(window.innerWidth, window.innerHeight);
document.getElementById("webgl").appendChild(renderer.domElement);
renderer.render(scene, camera);
}
function getBox(w, h, d) {
var geometry = new THREE.BoxGeometry(w, h, d);
var material = new THREE.MeshBasicMaterial({
color : 0x00ff00
});
var mesh = new THREE.Mesh(geometry, material);
return mesh;
}
init();

not sure if you're trying to create this scene with an orthographic camera or perspective camera, but you'll typically need to specify the camera by type (ie THREE.PerspectiveCamera(...)).
I also added a few extra lines to ensure the camera was configured correctly, namely, setting the "LookAt" point to (0,0,0) , as well as setting an actual position of the camera via the THREE.Vector3.set(...) method.
Here are my adjustments to your code:
function init() {
var scene = new THREE.Scene();
var box = getBox(1, 1, 1);
scene.add(box);
var camera = new THREE.PerspectiveCamera(70,
window.innerWidth/window.innerHeight, 0.1, 1000 ); // Specify camera type like this
camera.position.set(0,2.5,2.5); // Set position like this
camera.lookAt(new THREE.Vector3(0,0,0)); // Set look at coordinate like this
var renderer = new THREE.WebGLRenderer();
renderer.setSize(window.innerWidth, window.innerHeight);
document.getElementById("webgl").appendChild(renderer.domElement);
renderer.render(scene, camera);
}
function getBox(w, h, d) {
var geometry = new THREE.BoxGeometry(w, h, d);
var material = new THREE.MeshBasicMaterial({
color : 0x00ff00
});
var mesh = new THREE.Mesh(geometry, material);
return mesh;
}
init();

Try
camera.position.set( <X> , <Y> , <Z> );
where <X> and <Z> are 2D coordinates and <Y> is height

three.js texture not applied to mesh

I am trying to apply texture to my sphere mesh with the following.
var loader = new THREE.TextureLoader();
var balltex = loader.load("pic1.jpg");
var ballmat = new THREE.MeshBasicMaterial({ map:balltex });
var ballgeo = new THREE.SphereGeometry( 0.3, 20, 20 );
var ball = new THREE.Mesh( ballgeo , ballmat );
scene.add(ball);
Now I am just getting a black sphere instead of textured sphere. I do not know what is the problem in the code.
Please help me.

It's hard to say for sure without a complete example, but my first guess is the simplest case: the texture isn't finished loading by the time the mesh is rendered.
If that's the problem, make sure the texture(s) are loaded before you call your render loop. There are many ways to do this and it's hard to say which is best without seeing your code, but the most straightforward way to handle it is pass a function to the loader's load() method and call your renderer from it. A simple but complete example reworking the code you posted:
var scene, camera, light, renderer, balltex;
load();
function load() {
var loader;
loader = new THREE.TextureLoader(new THREE.LoadingManager());
loader.load('pic1.jpg', function(obj) {
balltex = obj;
init();
animate();
});
}
function init() {
var height = 500, width = 500, bg = '#000000';
scene = new THREE.Scene();
camera = new THREE.PerspectiveCamera(45, height/width, 1, 10000);
camera.position.set(1.5, 1.5, 1.5);
camera.lookAt(new THREE.Vector3(0, 0, 0));
scene.add(camera);
light = new THREE.AmbientLight(0xffffff);
scene.add(light);
var ballmat = new THREE.MeshBasicMaterial({
map: balltex
});
var ballgeo = new THREE.SphereGeometry( 0.3, 20, 20 );
var ball = new THREE.Mesh( ballgeo , ballmat );
scene.add(ball);
renderer = new THREE.WebGLRenderer({ antialias: true } );
renderer.setClearColor(bg);
renderer.setSize(width, height);
var d = document.createElement('div');
document.body.appendChild(d);
d.appendChild(renderer.domElement);
var c = document.getElementsByTagName('canvas')[0];
c.style.width = width + 'px';
c.style.height = height + 'px'
}
function animate() {
requestAnimationFrame(animate);
render();
}
function render() {
renderer.render(scene, camera);
}

Object rotation using the Device Orientation Controls in Three.js

I am making my first steps coding with JavaScript and playing with Three.js.
I am experimenting with this example from threejs.org :http://threejs.org/examples/#misc_controls_deviceorientation
and this is the code that they have:
(function() {
"use strict";
window.addEventListener('load', function() {
var container, camera, scene, renderer, controls, geometry, mesh;
var animate = function(){
window.requestAnimationFrame( animate );
controls.update();
renderer.render(scene, camera);
};
container = document.getElementById( 'container' );
camera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 1, 1100);
controls = new THREE.DeviceOrientationControls( camera );
scene = new THREE.Scene();
var geometry = new THREE.SphereGeometry( 500, 16, 8 );
geometry.scale( - 1, 1, 1 );
var material = new THREE.MeshBasicMaterial( {
map: new THREE.TextureLoader().load( 'textures/2294472375_24a3b8ef46_o.jpg' )
} );
var mesh = new THREE.Mesh( geometry, material );
scene.add( mesh );
var geometry = new THREE.BoxGeometry( 100, 100, 100, 4, 4, 4 );
var material = new THREE.MeshBasicMaterial( { color: 0xff00ff, side: THREE.BackSide, wireframe: true } );
var mesh = new THREE.Mesh( geometry, material );
scene.add( mesh );
renderer = new THREE.WebGLRenderer();
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize(window.innerWidth, window.innerHeight);
renderer.domElement.style.position = 'absolute';
renderer.domElement.style.top = 0;
container.appendChild(renderer.domElement);
window.addEventListener('resize', function() {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize( window.innerWidth, window.innerHeight );
}, false);
animate();
}, false);
})();
I am trying to control an object that I made with the orientation of a mobile device. I can do it, is just change this line
controls = new THREE.DeviceOrientationControls( camera );
for this line: controls = new THREE.DeviceOrientationControls( object );
But now, my problem is that It changes the initial rotation of the object:
It should be like this:
And I see this in my desktop:
And this in a mobile device:
I tryied to change the DeviceOrientationControls file but is not the best way I think.
Then I found this in Stack Overflow Orbiting around the origin using a device's orientation and they said that is not possible to do it with control device orientation, its necessary to modify the Orbit Controls, and it is very complicated too.
So my question is: Is there a simple way to change the initial rotation of an object and to limit it too? Using DeviceOrientationControls.js
EDIT
I found a way to make it without using the device orientation controls. I used this:
window.addEventListener('deviceorientation', function(e) {
var gammaRotation = e.gamma ? e.gamma * (Math.PI / 600) : 0;
monogram.rotation.y = gammaRotation;
});
It works perfectly when I use my device in a vertical position,but when I use it in landscape position it doesn't work. Do you have a suggestion?