When dealing with a 2D canvas, it's common practice to determine if an element is off-screen by checking its position coordinates like so:
if( pos.x > window.innerWidth || pos.x < 0 ||
pos.y > window.innerHeight || pos.y < 0 ) {
// Element has left the screen
}
However, in a Three.js scene, how can I verify if something is still within view of the camera?
Instead of analyzing a 2D canvas, you have the option to determine whether a 3D point is within a frustum.
camera.updateMatrix();
camera.updateMatrixWorld();
var frustum = new THREE.Frustum();
frustum.setFromMatrix(new THREE.Matrix4().multiplyMatrices(camera.projectionMatrix, camera.matrixWorldInverse));
// Specify your 3D point for evaluation
var pos = new THREE.Vector3(x, y, z);
if (frustum.containsPoint(pos)) {
// Perform actions based on the position...
}
const cameraView = new THREE.Frustum()
const matrixTransform = new THREE.Matrix4().multiplyMatrices(camera.projectionMatrix, camera.matrixWorldInverse)
cameraView.setFromProjectionMatrix(matrixTransform)
if (!cameraView.containsPoint(obj.position)) {
console.log('Object is out of sight')
}
Integrate this code into a tick function to receive updates when the object moves out of the camera view.
Note: setFromMatrix() has been replaced with setFromProjectionMatrix() in more recent versions of three.js.
I'm currently working on implementing a modal in my Angular application that, when opened, displays Google Maps within an iframe. The problem I'm facing is that the iframe isn't loading and I'm receiving this error in the browser conso ...
I am exploring the capabilities of AdonisJs query builder by referring to their documentation at Currently, I am attempting to replicate a scenario similar to the one demonstrated under the 'Conditional Queries' section: const query = Database. ...
I am attempting to have each option load a unique page within a frame <!DOCTYPE html> <html> <head> <script> function selectCountry() { var mylist=document.getElementById("country"); document.getElementById("frame").src=mylist.opti ...
My goal is to cycle through images every 2 seconds in a specific order. I have implemented two functions, cycle and random. However, the cycle function seems to rotate too quickly and gets stuck without repeating itself in the correct order. On the other ...
Let’s say I have a variable let message = "hello"; What is the process to send it to PHP and then post it? ...
I am working with a dropdown menu that contains various values... <select id="number1a" onChange="Addition()"> <option value="0" selected>-</option> <option value="10">10</option> <option value="7.5">7.5</optio ...
Currently, I am working on integrating a collapsible sidebar into my React application that relies on a value stored in the local storage. The intended behavior is for the sidebar to have the className of "inline" if the value is true, and "hidden" if the ...
Below is the code snippet I am working with: objs = [] getObjs() { let counter = 0 this.myService.getObjs() .map((obj) => { counter = counter > 5 ? 0 : counter; obj.col = counter; counter++; return view ...
Whenever I attempt to upload an image, this error message pops up: $ is not a function The source of the error can be found here: $(document).height(); ...
I am in the process of developing a brand new widget where we are incorporating a unique feature that displays the number of CSS files included within an HTML page. Our team requires the count and names of all CSS files utilized on the webpage. While I a ...
I am facing an issue while trying to invoke the function editAp located in the func.js file from Edit1.js. I have provided the code snippets below for better understanding: import firebase from "firebase"; if (!firebase.apps.length) { firebase.initializ ...
Hey there, I recently tried out the autocomplete script created by tomickigrzegorz. Check it out here! It's been working smoothly for me, but I'm facing an issue with external link tags like https//google.com not functioning properly. Here is ...
I am working with a JSONB column in my database. My goal is to make a query to the database where I can check if a specific value in this JSON is true or false: SELECT * FROM table WHERE ("json_column"->'data'->>'data2')::boo ...
I am having trouble figuring out how to add 2 external buttons to print and save an embedded pdf on my webpage. Despite searching Google for hours, I have not been able to find a solution that works. The embedded object already has buttons for printing and ...
I need assistance in displaying users and their metadata in a table on my website. Here is the code snippet I have: const apiKey = process.env.CLERK_SECRET_KEY; if (!apiKey) { console.error('API_KEY not found in environment variables'); proc ...
When printing a string containing HTML links, I need to truncate the visible text while preserving the link structure. Simply using a substring method would disrupt the HTML tags in the string. I aim to display only 100 characters but also remove any inc ...
How can I trigger the quickViewModal to open and send an ID to be read in the modal component? Seeking assistance from anyone who can help. Below is the HTML code where the modal is being called: <div class="icon swipe-to-top" data-toggle="modal" da ...
One interesting feature I've observed in various web-based email providers is the ability to add the website as the default mailto links handler in browsers like Firefox and Chrome. This means that when clicking on a mailto: link, it will automaticall ...
I have a listbox on a webform that is being populated by a datasource from a SQL Server 2008. Based on the text in the list box, I want the background color of each specific item to be different. For example, if these are the items in the list: AA item ...
Here is the method I am currently working with: wordFormDirty = (): boolean => { var self = this; angular.forEach(self.word.wordForms, function (wf, key) { var wordFormNgForm = 'wordFormNgForm_' + wf.wordFormId if ...