Utilizing a 3D object exported from Blender, specifically cylinder.obj, I have successfully implemented its rendering on the screen with the help of Three.js. The functionality to rotate the object using mouse input has also been integrated. This entire visualization is enclosed within a sizable div element measuring at 600x600 pixels.
The code snippet below outlines the render logic:
// Function that continuously renders the scene and updates it when necessary.
function animate() {
// Render the scene.
renderer.render(scene, camera);
requestAnimationFrame(animate);
}
My current understanding suggests that this initiates a continuous loop where the object keeps getting rendered on the page repeatedly.
Is there a way to render the object only once in the scene and then refresh it solely upon modifications such as texture alterations or rotational adjustments triggered by mouse movements? Upon completion of these changes, I aim for the scene to remain static without utilizing excessive CPU resources for 3D rendering.
In essence, is there a method to trigger rendering only when required and maintain an idle state without significant CPU consumption when the scene functions akin to an image?
I am relatively new to three.js and conducting tests on this application primarily on Chrome and IE11. Kindly let me know if additional details are needed for clarification.
EDIT: Here is the complete JavaScript code provided:
// Global variables declaration
// Initialize the scene, camera, and renderer as global entities.
var scene, camera, renderer;
var WIDTH = $("#myDiv").width(),
HEIGHT = $("#myDiv").height();
// Setting up the scene components.
function init() {
// Creation of the scene along with setting its dimensions.
scene = new THREE.Scene();
// Generate a renderer and append it to the DOM.
if (Detector.webgl)
renderer = new THREE.WebGLRenderer({ antialias: true });
else
renderer = new THREE.CanvasRenderer();
renderer.setSize(WIDTH, HEIGHT);
renderer.domElement.id = 'mycanvas';
console.log(renderer);
$("#myDiv").append(renderer.domElement);
// Establishing the camera perspective, positioning, and inclusion within the scene.
camera = new THREE.PerspectiveCamera(45, WIDTH / HEIGHT, 0.1, 100);
camera.position.set(-3, 4, 12);
scene.add(camera);
// Implementing an event listener for resizing the renderer alongside the browser window.
window.addEventListener('resize', function () {
var WIDTH = window.innerWidth,
HEIGHT = window.innerHeight;
renderer.setSize(WIDTH, HEIGHT);
camera.aspect = WIDTH / HEIGHT;
camera.updateProjectionMatrix();
});
// Defining the scene's background color.
renderer.setClearColor(0x333F47, 1);
// Incorporating point lights into the scene.
var light2 = new THREE.PointLight(0xffffff);
light2.position.set(0, 10, -10);
scene.add(light2);
var light3 = new THREE.PointLight(0xffffff);
light3.position.set(1, 5, 10);
scene.add(light3);
// Loading the mesh model and adding it to the scene.
var objLoader = new THREE.OBJLoader();
objLoader.load('objects/male.obj', function (object) {
object.position.y = 0;
object.scale.x = object.scale.y = object.scale.z = 1;
scene.add(object);
});
}
// Rendering the scene and updating the display based on necessity.
function draw() {
//requestAnimationFrame(draw);
// Render the scene.
renderer.render(scene, camera);
}
init();
draw();