To handle the click event, I leveraged a library known as threex.domevents. For more details, you can refer to the GitHub page. The code for the event is fairly self-explanatory.
Initially, domevents must be initialized within your scene in the following manner:
var domEvents = new THREEx.DomEvents(camera, renderer.domElement);
Subsequently, I designed a custom Mesh object:
// function to generate a random id
function genRandomId()
{
var text = "";
var possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
for( var i=0; i < 5; i++ )
text += possible.charAt(Math.floor(Math.random() * possible.length));
return text;
}
// function to generate a random integer for position
var min = -50;
var max = 50;
function genRandomInt(min, max) {
return Math.floor(Math.random() * (max - min)) + min;
}
// defining custom mesh --------------------------------------------
function MyMesh(geometry, material, destinationContainer) {
THREE.Mesh.call(this, geometry, material);
this.userData = {
foo1: genRandomId(),
foo2: genRandomId(),
foo3: genRandomId(),
};
this.position.x = genRandomInt(min, max);
this.position.y = genRandomInt(min, max);
this.position.z = genRandomInt(min, max);
var that = this;
// setting up click event listener
domEvents.addEventListener(this, 'click', function(event) {
console.log('clicked object on position:');
console.log(that.position);
destinationContainer.userData = that.userData;
console.log('Now the container has:');
console.log(destinationContainer.userData);
destinationContainer.userData = that.userData;
}, false);
}
MyMesh.prototype = Object.create(THREE.Mesh.prototype);
MyMesh.prototype.constructor = MyMesh;
The functions genRandomId and genRandomInt serve as random generators for illustration purposes. The code for generating random ids was inspired by a Stack Overflow post titled Generate random string/characters in JavaScript.
Incorporate around 200 instances of MyMesh meshes in your scene:
const color = 0x156289;
const emissive = 0x072534;
var planeGeometry = new THREE.PlaneGeometry(5, 5);
var planeMaterial = new THREE.MeshPhongMaterial({
color: color,
emissive: emissive,
side: THREE.DoubleSide,
shading: THREE.FlatShading
});
var planeMesh = new THREE.Mesh(planeGeometry, planeMaterial);
scene.add(planeMesh);
var objGeometry = new THREE.BoxGeometry(1, 1, 1);
var objMaterial = new THREE.MeshPhongMaterial({
color: color,
emissive: emissive,
shading: THREE.FlatShading
});
var i = 0;
while (i < 200) {
scene.add(new MyMesh(objGeometry, objMaterial, planeMesh));
i++;
}
Lastly, render the scene:
var render = function() {
requestAnimationFrame(render);
planeMesh.rotation.x += 0.010;
planeMesh.rotation.y += 0.010;
renderer.render(scene, camera);
};
render();
A demo showcasing the complete source code can be accessed through this link:
If you open the browser console and click on a cube, you'll observe that the planeMesh alters its userData attributes with those of the clicked cube mesh.