Hi, I should create a drawing with three.js starting from a file obj but I do not know where to start.
Can you give me some advice?
Thank you
You can use the following example as a starter template:
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I have made a simple example:
http://threejs.hofk.de/OBJLoader/loadExampleObject.html
view-source:http://threejs.hofk.de/OBJLoader/spiner.obj
view-source:http://threejs.hofk.de/OBJLoader/spiner.mtl
License information for the object only in German.
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Hello, using the sample does not display anything.
this is the code
<script src="js/OBJLoader.js"></script>
<script>
var container;
var camera, scene, renderer;
var mouseX = 0, mouseY = 0;
var windowHalfX = window.innerWidth / 2;
var windowHalfY = window.innerHeight / 2;
init();
animate();
function init() {
container = document.createElement( 'div' );
document.body.appendChild( container );
camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 1, 2000 );
camera.position.z = 50;
// scene
scene = new THREE.Scene();
var ambientLight = new THREE.AmbientLight( 0xcccccc, 0.4 );
scene.add( ambientLight );
var pointLight = new THREE.PointLight( 0xffffff, 0.8 );
camera.add( pointLight );
scene.add( camera );
// texture
var manager = new THREE.LoadingManager();
manager.onProgress = function ( item, loaded, total ) {
console.log( item, loaded, total );
};
var textureLoader = new THREE.TextureLoader( manager );
var texture = textureLoader.load( 'textures/UV_Grid_Sm.jpg' );
// model
var onProgress = function ( xhr ) {
if ( xhr.lengthComputable ) {
var percentComplete = xhr.loaded / xhr.total * 100;
console.log( Math.round(percentComplete, 2) + '% downloaded' );
}
};
var onError = function ( xhr ) {
};
var loader = new THREE.OBJLoader( manager );
loader.load( 'js/note.obj', function ( object ) {
object.traverse( function ( child ) {
if ( child instanceof THREE.Mesh ) {
child.material.map = texture;
}
} );
object.position.y = - 10;
scene.add( object );
}, onProgress, onError );
//
renderer = new THREE.WebGLRenderer();
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( window.innerWidth, window.innerHeight );
container.appendChild( renderer.domElement );
document.addEventListener( 'mousemove', onDocumentMouseMove, false );
//
window.addEventListener( 'resize', onWindowResize, false );
}
function onWindowResize() {
windowHalfX = window.innerWidth / 2;
windowHalfY = window.innerHeight / 2;
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize( window.innerWidth, window.innerHeight );
}
function onDocumentMouseMove( event ) {
mouseX = ( event.clientX - windowHalfX ) / 2;
mouseY = ( event.clientY - windowHalfY ) / 2;
}
//
function animate() {
requestAnimationFrame( animate );
render();
}
function render() {
camera.position.x += ( mouseX - camera.position.x ) * .05;
camera.position.y += ( - mouseY - camera.position.y ) * .05;
camera.lookAt( scene.position );
renderer.render( scene, camera );
}
</script>
Thanks!
Live demo with a different model: https://jsfiddle.net/f2Lommf5/8358/
If I replace the OBJ with the original model of the repo, everything works fine. So there has to be a problem with your note.obj. Please share the file in this thread.
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note.obj (9.2 KB)
Your OBJ file renders fine. Just remove in your code object.position.y = - 10; and add object.rotation.x = - Math.PI * 0.5; instead. You should see the model in front of the camera. The texture is not displayed since the model has no uv coordinates.
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Ok, I display it with Firefox and not with Chrome.
Would there be a way to enlarge the design?
Thank you
Do you mean scaling the model? Try e.g. object.scale.set( 2, 2, 2 );.
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Nothing changes and not display with Chrome
Hello, I solved the problem of size but I display the drawing only on Firefox?
How I solve.
Thanks again
Please provide a live example that with your current progress. Otherwise it will be hard to help you further.
1 Like
note.obj
body {
margin: 0;
}
<script src="https://threejs.org/build/three.js"></script>
<script src="https://threejs.org/examples/js/loaders/OBJLoader.js"></script>
<script>
var container;
var camera, scene, renderer;
var mouseX = 0, mouseY = 0;
var windowHalfX = window.innerWidth / 2;
var windowHalfY = window.innerHeight / 2;
init();
animate();
function init() {
container = document.createElement('div');
document.body.appendChild(container);
camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 1, 2000);
camera.position.z = 250;
// scene
scene = new THREE.Scene();
var ambientLight = new THREE.AmbientLight(0xcccccc, 0.4);
scene.add(ambientLight);
var pointLight = new THREE.PointLight(0xffffff, 0.8);
camera.add(pointLight);
scene.add(camera);
// texture
var manager = new THREE.LoadingManager();
manager.onProgress = function (item, loaded, total) {
console.log(item, loaded, total);
};
var textureLoader = new THREE.TextureLoader(manager);
var texture = textureLoader.load('https://threejs.org/examples/textures/UV_Grid_Sm.jpg');
// model
var onProgress = function (xhr) {
if (xhr.lengthComputable) {
var percentComplete = xhr.loaded / xhr.total * 100;
console.log(Math.round(percentComplete, 2) + '% downloaded');
}
};
var onError = function (xhr) {
};
var loader = new THREE.OBJLoader(manager);
loader.load('js/note.obj', function (object) {
object.traverse(function (child) {
if (child instanceof THREE.Mesh) {
child.material.map = texture;
}
});
object.position.y = - Math.PI * 0.5;
object.scale.set( 20, 20, 20 );
scene.add(object);
}, onProgress, onError);
//
renderer = new THREE.WebGLRenderer();
renderer.setPixelRatio(window.devicePixelRatio);
renderer.setSize(window.innerWidth, window.innerHeight);
container.appendChild(renderer.domElement);
document.addEventListener('mousemove', onDocumentMouseMove, false);
//
window.addEventListener('resize', onWindowResize, false);
}
function onWindowResize() {
windowHalfX = window.innerWidth / 2;
windowHalfY = window.innerHeight / 2;
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize(window.innerWidth, window.innerHeight);
}
function onDocumentMouseMove(event) {
mouseX = (event.clientX - windowHalfX) / 2;
mouseY = (event.clientY - windowHalfY) / 2;
}
//
function animate() {
requestAnimationFrame(animate);
render();
}
function render() {
camera.position.x += (mouseX - camera.position.x) * 0.05;
camera.position.y += (- mouseY - camera.position.y) * 0.05;
camera.lookAt(scene.position);
renderer.render(scene, camera);
}
</script>
Message conslole chrome:
three.js:31844 Failed to load file:///C:/Users/anton/Desktop/progetto-threejs/js/note.obj: Cross origin requests are only supported for protocol schemes: http, data, chrome, chrome-extension, https.
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