Trying to add 3D text in my react application by three JavaScript. Following code is giving a blank page in output. This is my 1st attempt with Three.js. Any help will be appreciated,
Same code is working while I am adding any other geometry with same format.
class ThreeScene extends Component {
componentDidMount() {
const width = this.mount.clientWidth
const height = this.mount.clientHeight
//ADD SCENE
this.scene = new THREE.Scene()
//ADD CAMERA
this.camera = new THREE.PerspectiveCamera(75, width / height, 0.1, 1000)
this
.camera
.position
.set(-15, 0, 25);
this
.camera
.lookAt(this.scene.position);
// Add Font Loader
this.loader = new THREE.FontLoader();
const self = this;
this
.loader
.load('fonts/helvetiker_regular.typeface.json', function (font) {
var material = new THREE.MeshPhongMaterial({color: 0x0033ff, specular: 0x555555, shininess: 30});
var geometry = new THREE.TextGeometry('Hello', {
font: font,
size: 80,
height: 5,
curveSegments: 12,
bevelEnabled: true,
bevelThickness: 10,
bevelSize: 8,
bevelSegments: 5
});
self.textData = new THREE.Mesh(geometry, material);
self
.scene
.add(self.textData);
self.light = new THREE.DirectionalLight(0xffffff);
self
.light
.position
.set(0, 1, 1)
.normalize();
self
.scene
.add(self.light);
});
this.renderer = new THREE.WebGLRenderer({antialias: true});
this
.renderer
.setSize(width, height)
this
.mount
.appendChild(this.renderer.domElement);
this.start()
}
renderScene = () => {
this
.renderer
.render(this.scene, this.camera)
}
}
Your font defined here is causing that issue...
.load('fonts/helvetiker_regular.typeface.json',
Try using placing the file (fonts/helvetiker_regular.typeface.json') into your public folder (e.g fonts) and then access that using
.load('/fonts/helvetiker_regular.typeface.json',
So, I ran into the same issue. You want to make sure that you are including the json code example from the THREE.js. You can find it in there github repo if you do not have it locally.
Font Code
This is the most basic code to get it up and runnin ghten you can fill out your styling params.
let loader = new THREE.FontLoader();
let font = loader.parse(fontJSON);
let geometry = new THREE.TextGeometry("Hello World",{font: font, size: 1, height:1 });
let material = new THREE.MeshBasicMaterial({color:0xffffff});
let text = new THREE.Mesh(geometry, material);
text.position.x = 1;
scene.add(text)
NOTE: You will get an error for fontJSON is undefined if you do not include let fontJSON = {code from three.js github library}
Related
Following the manual, I made a three.js example, but the light effect doesn't appear, why the light source doesn't appear without any error about the light source?
import * as THREE from "/assets/threejs/build/three.module.js"
class App {
// 생성 초기화
constructor(){
const divContainer = document.querySelector("#webgl-container");
this._divContainer = divContainer;
const renderer = new THREE.WebGLRenderer({antialias: true})
renderer.setPixelRatio(window.devicePixelRatio);
divContainer.appendChild(renderer.domElement);
this._renderer = renderer;
const scene = new THREE.Scene();
this._scene = scene;
this._setupCamera();
this._setupLight();
this._setupModel();
window.onresize = this.resize.bind(this);
this.resize();
requestAnimationFrame(this.render.bind(this));
}
// 카메라
_setupCamera() {
const width = this._divContainer.clientWidth;
const height = this._divContainer.clientHeight;
const camera = new THREE.PerspectiveCamera(
75,
width / height,
0.1,
100,
)
camera.position.z = 2
this._camera = camera;
}
// 광원
_setupLight(){
const color = 0xffffff;
const intensity = 1;
const light = new THREE.DirectionalLight(color, intensity);
light.position.set(-1, 2, 4);
this._scene.add(light);
}
// 모델
_setupModel(){
const geometry = new THREE.BoxGeometry(1,1,1);
const material = new THREE.MeshBasicMaterial( { color: 0x44a88 } );
const cube = new THREE.Mesh( geometry, material );
this._scene.add(cube);
this._cube = cube;
}
// 창크기 번경
resize(){
const width = this._divContainer.clientWidth;
const height = this._divContainer.clientHeight;
this._camera.aspect = width / height;
this._camera.updateProjectionMatrix();
this._renderer.setSize(width, height);
}
// 랜더링
render(time){
this._renderer.render(this._scene, this._camera);
this.update(time);
requestAnimationFrame(this.render.bind(this));
}
// 업데이트
update(time){
time *= 0.001;
this._cube.rotation.x = time;
this._cube.rotation.y = time;
}
}
window.onload = function(){
new App();
}
The screenshot below is the result of my example code.
The screenshot below is the result of the manual.
I'm sorry for posting multiple questions with a low difficulty problem, but, I'm learning three.js for the first time. In vscode, there is no three.js code hint library, and it's hard. How can I express the light effect normally in my example code? Will there be? thanks for reading the problem
Do not use MeshBasicMaterial, but MeshStandardMaterial. MeshBasicMaterial for drawing geometries in a flat or wireframe way. MeshStandardMaterial is a physically based material that makes the surface interact with the light.
I'm setting up a website that loads 3d models in ply format, and I'm using Three.js with his PLYLOADER to do that.
My problem is that every model is loading in a different position. I've managed to make them load in a perpendicular way with the ground, but some of them are looking, some are looking far away from the camera and others look like they turn around a Y axis (not their center).
This is my HTML div:
<div id="WebGL-output"></div>
This is my JS code:
<script type="text/javascript">
var lesson7 = {
scene: null,
camera: null,
renderer: null,
container: null,
controls: null,
clock: null,
stats: null,
init: function() { // Initialization
// create main scene
this.scene = new THREE.Scene();
this.scene.fog = new THREE.FogExp2(0xcce0ff, 0.0003);
var SCREEN_WIDTH = '800',
SCREEN_HEIGHT = '600';
// prepare camera
var VIEW_ANGLE = 60, ASPECT = SCREEN_WIDTH / SCREEN_HEIGHT, NEAR = 0.1, FAR = 20000;
this.camera = new THREE.PerspectiveCamera( VIEW_ANGLE, ASPECT, NEAR, FAR);
this.scene.add(this.camera);
this.camera.position.set(0, 0, 300);
this.camera.lookAt(new THREE.Vector3(0,0,0));
// prepare renderer
this.renderer = new THREE.WebGLRenderer({ antialias:true });
this.renderer.setSize(SCREEN_WIDTH, SCREEN_HEIGHT);
this.renderer.setClearColor(this.scene.fog.color);
this.renderer.shadowMapEnabled = true;
this.renderer.shadowMapSoft = true;
// prepare container
this.container = document.getElementById('WebGL-output');
this.container.appendChild(this.renderer.domElement);
// events
THREEx.WindowResize(this.renderer, this.camera);
// prepare controls (OrbitControls)
this.controls = new THREE.OrbitControls(this.camera, this.renderer.domElement);
this.controls.target = new THREE.Vector3(0, 0, 0);
this.controls.maxDistance = 20000;
// prepare clock
this.clock = new THREE.Clock();
this.scene.add( new THREE.AmbientLight(0xFFFFFF) );
// light
var dirLight = new THREE.DirectionalLight(0x606060);
dirLight.position.set(200, 200, 1000).normalize();
this.camera.add(dirLight);
this.camera.add(dirLight.target);
// load models
this.loadModels();
},
loadModels: function() {
// prepare PLY loader and load the model
var scene = new THREE.Scene();
var oPlyLoader = new THREE.PLYLoader();
oPlyLoader.load("../models/{{ $analysis->three_d_model }}", function(geometry) {
var material = new THREE.MeshPhongMaterial( { color: 0xAAAAAA, specular: 0x111111, shininess: 0 } );
var meshMaterial = material;
// if (geometry.hasColors) { // to fix when models will have colors
meshMaterial = new THREE.MeshPhongMaterial({ opacity: 1, vertexColors: THREE.VertexColors });
// }
var mesh = new THREE.Mesh(geometry, meshMaterial);
// Solution: center mesh to world origin
mesh.geometry.computeBoundingBox();
var bbox = mesh.geometry.boundingBox;
var centerVec = new THREE.Vector3();
bbox.getCenter(centerVec); // get center of bbox into centerVec
// move mesh so that center of bbox is placed to world origin
mesh.applyMatrix(new THREE.Matrix4().makeTranslation(-centerVec.x, -centerVec.y, -centerVec.z));
// proceed doing stuff
// mesh.position.set(0, -6, 0);
// mesh.scale.set(5, 5, 5);
lesson7.scene.add(mesh);
});
}
};
// Animate the scene
function animate() {
requestAnimationFrame(animate);
render();
update();
}
// Update controls and stats
function update() {
lesson7.controls.update(lesson7.clock.getDelta());
// lesson7.stats.update();
}
// Render the scene
function render() {
if (lesson7.renderer) {
lesson7.renderer.render(lesson7.scene, lesson7.camera);
}
}
// Initialize lesson on page load
function initializeLesson() {
lesson7.init();
animate();
}
if (window.addEventListener)
window.addEventListener('load', initializeLesson, false);
else if (window.attachEvent)
window.attachEvent('onload', initializeLesson);
else window.onload = initializeLesson;
</script>
I need help to make them all load with the same camera position, looking centred and in the same size.
PS: If i can have better results loading in different extension, I'm up for it.
Thanks in advance
EDIT:
I updated the code with the help of #alex. Now my models are very well centered. The only thing missing now si a fixed camera position however the model was saved
Currently see two solutions here ( if i understand correctly )
You objects are not centered correctly. The solution would be to open the model files in a 3d editor and set them all to the same size and make their center points consistent.
Once you load the model add it to an Object3D and find its center.
Docs about that here: https://threejs.org/docs/#api/en/core/Object3D
the below code this.objectAll is the Object3D. Which is put into a box and we make the controls look at the center of that box. If all model are consistent then this should work.
this.boundingBox = new THREE.Box3();
this.boundingBox.setFromObject(this.objectAll);
this.boundingBox.center(this.controls.target);
Best of luck!
I have a three.js mesh loaded from an STL file:
var loader = new THREE.STLLoader();
var materialmodel = new THREE.MeshPhongMaterial(
{
color: 0xFF0000,
specular: 0x222222,
shininess: 75
}
);
function model()
{
loader.load( 'models/stl/binary/model.stl', function ( geometry ) {
var meshMaterial = materialmodel;
var model = new THREE.Mesh( geometry, meshMaterial );
model.scale.set( 0.02, 0.02, 0.02 );
model.castShadow = true;
model.receiveShadow = true;
model.geometry.center();
scene.add(model);
render();
} );
}
model();
When I call the model function in my page, the model renders as expected.
I want to use dat.gui to as a lightweight interface for on the fly changes.
My first experiment is changing the color of the model.
The code I'm using is this:
var params = {
modelcolor: 0xff0000, //RED
};
var gui = new dat.GUI();
var folder = gui.addFolder( 'Model Colour' );
folder.addColor( params, 'modelcolor' )
.name('Model Color')
.listen()
.onChange( function() { materialmodel.MeshPhongMaterial.color.set( params.modelcolor); } );
folder.open();
DAT.GUIs color picker appears fine, and I can select a color from the picker and the new hex value will display.
However, the model/mesh itself doesn't update with the newly selected colour.
I'm wondering if it's something to do with how I'm changing the color materialmodel.MeshPhongMaterial.color.set( params.modelcolor); (I've tried different ways of doing this with no luck).
I've seen a post here (one of the answers) where they're doing this using model.material.color.set(params.color) in their example. My owen material properties are defined in a variable using a THREE.MeshPhongMaterial.....
Assuming this is where I've gone wrong, how can I change the color dynamically of a nested prroperty buried in a variable like this?
I didn't get why did you use .listen(), possibly there's a certain reason.
In .onUpdate function you're using materialmodel, which is a material itself, and then you're setting .MeshPhongMaterial property that doesn't exist. Looks like you simply overlooked it.
Here is a working example:
var scene = new THREE.Scene();
var camera = new THREE.PerspectiveCamera(60, window.innerWidth / window.innerHeight, 1, 1000);
camera.position.set(0, 0, 10);
var renderer = new THREE.WebGLRenderer();
renderer.setSize(window.innerWidth, window.innerHeight);
document.body.appendChild(renderer.domElement);
var light = new THREE.DirectionalLight(0xffffff, 0.5);
light.position.setScalar(10);
scene.add(light);
scene.add(new THREE.AmbientLight(0xffffff, 0.5));
var materialmodel = new THREE.MeshPhongMaterial({
color: 0xFF0000,
specular: 0x222222,
shininess: 75
});
var geometrymodel = new THREE.SphereBufferGeometry(5, 32, 16);
var model = new THREE.Mesh(geometrymodel, materialmodel);
scene.add(model);
var params = {
modelcolor: "#ff0000"
};
var gui = new dat.GUI();
var folder = gui.addFolder('Model Colour');
folder.addColor(params, 'modelcolor')
.name('Model Color')
.onChange(function() {
materialmodel.color.set(params.modelcolor);
});
folder.open();
render();
function render() {
requestAnimationFrame(render);
renderer.render(scene, camera);
}
body {
overflow: hidden;
margin: 0;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/96/three.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/dat-gui/0.7.2/dat.gui.min.js"></script>
I am just getting into babylon.js, but I can't seem to figure out, how would you change color of a material ?
My code currently is:
/* eslint-disable */
import * as BABYLON from 'babylonjs';
// Get the canvas element from our HTML above
const canvas = document.getElementById("root");
// Load the BABYLON 3D engine
const engine = new BABYLON.Engine(canvas, true);
let fn;
let mainColor = new BABYLON.Color3(1.0, 0.2, 0.7);
setTimeout(() => {
mainColor = new BABYLON.Color3(0.3, 0.2, 0.2);
fn();
}, 2000);
// This begins the creation of a function that we will 'call' just after it's built
function createScene () {
// Now create a basic Babylon Scene object
const scene = new BABYLON.Scene(engine);
// Change the scene background color to green.
scene.clearColor = new BABYLON.Color4(0.5, 0.8, 0.6, 0.8);
// This creates and positions a free camera
const camera = new BABYLON.ArcRotateCamera("ArcRotateCamera", 1, 0.8, 30, new BABYLON.Vector3(0, 0, 0), scene);
// This targets the camera to scene origin
camera.setTarget(BABYLON.Vector3.Zero());
// This attaches the camera to the canvas
camera.attachControl(canvas, false);
// This creates a light, aiming 0,1,0 - to the sky.
const light = new BABYLON.HemisphericLight("light1", new BABYLON.Vector3(1, 1, 1), scene);
// Dim the light a small amount
light.intensity = .5;
// Let's try our built-in 'sphere' shape. Params: name, subdivisions, size, scene
const sphere = BABYLON.Mesh.CreateSphere("sphere1", 16, 2, scene);
const materialSphere1 = new BABYLON.StandardMaterial("texture1", scene);
materialSphere1.alpha = 1;
materialSphere1.diffuseColor = mainColor;
sphere.material = materialSphere1;
sphere.position.y = 1;
// Move the sphere upward 1/2 its height
// Let's try our built-in 'ground' shape. Params: name, width, depth, subdivisions, scene
const ground = BABYLON.Mesh.CreateGround("ground1", 6, 6, 2, scene);
fn = () => {
materialSphere1.diffuseColor = mainColor;
}
// Leave this function
return scene;
}; // End of createScene function
const scene = createScene();
engine.runRenderLoop(function () {
scene.render();
});
window.addEventListener("resize", function () {
engine.resize();
});
It looks aweful to me. As you can see i am defining fn inside the createScene which then allows me to modify it that way, however I believe that there should be a better way of doing it. I tried creating a function outside the createScene(), that would fetch the color, and then use that for materialSphere1.diffuseColor, however that did not work. So my question is: Is there any other (nicer) way to change a color of a material in babylon.js
Why not declaring your material outside of the callback?
You can also use scene.materials to browse materials
Today I've been experimenting with building my first ever skybox in three.js. I've read a lot of tutorials and the code I've ended up with is based on this one: http://learningthreejs.com/blog/2011/08/15/lets-do-a-sky/
I did make a few changes in order to allow for the images to load first, and to make it compatible with the version of three.js which I am using.
I've overcome a lot of small problems to get to the point I am currently at, but cannot find any answer to my current issue despite having searched quite hard. My problem is that despite using purpose-built skybox textures downloaded from the internet, it is glaringly obvious that my skybox is a cube with corners and edges. The textures appear heavily distorted and are not at all convincing.
Here is a screenshot of how my skybox looks:
And here is a link to the site from which I downloaded the images:
http://www.humus.name/index.php?page=Cubemap&item=Yokohama3
As you can see, in their preview it looks much better.
I've tried this with a few different downloaded textures and every time it is very obvious that you are looking at the inside of a cube.
Here's my code (I'm including all my code, not just the section which creates the skybox):
var scene;
var camera;
var renderer;
function createRenderer () {
renderer = new THREE.WebGLRenderer();
renderer.setClearColor(0x000000, 1.0)
renderer.setSize(window.innerWidth, window.innerHeight)
renderer.shadowMapEnabled = true;
//renderer.shadowCameraNear = 0.5;
//renderer.shadowCameraFar = 500;
}
function createCamera () {
camera = new THREE.PerspectiveCamera(
45,
window.innerWidth/window.innerHeight,
0.1, 1000
);
camera.position.x = 50;
camera.position.y = 30;
camera.position.z = 40;
camera.lookAt(scene.position);
}
function createPlane () {
var material = new THREE.MeshLambertMaterial({
color: 0xcccccc,
})
var geometry = new THREE.PlaneGeometry(40, 40)
var plane = new THREE.Mesh(geometry, material)
plane.receiveShadow = true;
plane.rotation.x = -Math.PI/2
plane.position.y = -6;
scene.add(plane)
}
function createLight () {
var spotLight = new THREE.DirectionalLight(0xffffff);
spotLight.position.set( 0, 50, 20 );
spotLight.shadowCameraVisible = true;
spotLight.shadowDarkness = 0.5
spotLight.shadowCameraNear = 0;
spotLight.shadowCameraFar = 100;
spotLight.shadowCameraLeft = -50;
spotLight.shadowCameraRight = 50;
spotLight.shadowCameraTop = 50;
spotLight.shadowCameraBottom = -50;
spotLight.castShadow = true;
scene.add(spotLight);
}
function createSkyboxAndSphere () {
var urlPrefix = "Yokohama3/";
var urls = [ urlPrefix + "posx.jpg", urlPrefix + "negx.jpg",
urlPrefix + "posy.jpg", urlPrefix + "negy.jpg",
urlPrefix + "posz.jpg", urlPrefix + "negz.jpg" ];
var textureCube = THREE.ImageUtils.loadTextureCube( urls , undefined, function () {;
var shader = THREE.ShaderLib["cube"];
var uniforms = THREE.UniformsUtils.clone( shader.uniforms );
shader.uniforms['tCube'].value = textureCube; // textureCube has been init before
var material = new THREE.ShaderMaterial({
fragmentShader : shader.fragmentShader,
vertexShader : shader.vertexShader,
uniforms : shader.uniforms,
depthWrite : false,
side: THREE.BackSide,
});
var geometry = new THREE.BoxGeometry(100, 100, 100)
var skybox = new THREE.Mesh(geometry, material)
scene.add(skybox)
var material = new THREE.MeshPhongMaterial({
color: "red",
envMap: textureCube,
reflectivity: 0.3,
})
var geometry = new THREE.SphereGeometry(6, 30, 15)
var sphere = new THREE.Mesh(geometry, material)
sphere.castShadow = true;
sphere.receiveShadow = true;
scene.add(sphere)
});
}
function init () {
scene = new THREE.Scene();
createRenderer();
createCamera();
createLight();
createPlane ();
createSkyboxAndSphere ();
document.getElementById("container").appendChild(renderer.domElement)
render ()
}
function render () {
renderer.render(scene, camera)
requestAnimationFrame(render);
}
window.onload = function () {
init ();
}
I suspect I am fundamentally misunderstanding something about how cubemapping and skyboxes work - I am very new to this in particular and javascript in general and am aware of huge gaps in my knowledge.
My apologies if the answer to this is obvious and/or the question has been asked before, and a pre-emptive thanks for your help!
Your camera needs to be in the center of the skybox -- or at least near the center.
So either move your camera very close to the box center, or update the box position every frame to match the camera position.
Or make the skybox much bigger relative to the camera offset from the origin.
Or place the skybox in a separate scene and have two cameras and two render passes, as in this example.
three.js r.74