Obtain facial rotation using Three.js

In my code, I am calculating the intersections of mouse clicks with Three.js as follows:

myVector.set(
    (event.clientX / window.innerWidth) * 2 - 1,
    -(event.clientY / window.innerHeight) * 2 + 1,
    0.5);
myVector.unproject(myApp.camera);
myRay.set(myApp.camera.position, myVector.sub(myApp.camera.position).normalize());
var intersections = myRay.intersectObjects(myApp.colliders, false);

After successfully obtaining the intersections, I can access properties such as

distance, face, faceIndex, object,
and point, which allow me to trigger a specific function.

The issue I'm facing is determining when a click occurs on a specific face of an object, for example, on the grey face of a cube in the provided example.

Apologies for any confusion caused by my explanation.

Answer №1

WebGL establishes the positions of vertices and faces using coordinates, colors, and normals. A face normal is a normalized vector that is perpendicular to the face plane (typically pointing 'outside' the mesh), determining its orientation and aiding in lighting calculations. In three.js, access to the face normal is available through face.normal.

  • If your floor-like faces are completely horizontal, their normals will all be precisely {x:0,y:1,z:0}. With normals being normalized, simply checking if face.normal.y === 1 will also imply x and z equal 0.

  • For non-horizontal faces, it may be necessary to set a limit angle with respect to the y-axis. This angle can be calculated using

    var angle=Math.acos(Yaxis.dot(faceNormal))
    , where Yaxis=new THREE.Vector3(0,1,0).

Similar questions

If you have not found the answer to your question or you are interested in this topic, then look at other similar questions below or use the search

Retrieving a single item from an array of objects with the help of body parser

I need assistance with sending an array of objects to a post route in my express app. Here is my form (written in ejs format): <form action="/archiveList/<%= list._id %>" method="POST"> <input type="hidden" name="list" value = <%= items ...

Is there any benefit to making the SVG elements width and height 100%?

The Angular Material documentation app features an SVG Viewer that is able to scale the SVG content to fit the container using the following function: inlineSvgContent(template) { this.elementRef.nativeElement.innerHTML = template; if (this.sca ...

Slicknav is failing to appear on the screen, although it is being

After spending hours trying to implement a slicknav menu into my school project, I'm stuck and seeking guidance. Despite having some coding experience, I can't seem to find the solution to my problem. Any help, insight, or tips on fixing or impro ...

How to Implement Flexbox Display Across Various Browsers Using jQuery?

Running into an issue here. I'm trying to switch from display: none to display: flex, display: flex-box, and display: -ms-flexbox but for some reason it's causing errors in my code.. Here's what I've been working on: $(elem).css({&apos ...

Incorporate this form created externally onto my website

I have been working on my website and I am looking to incorporate a form that opens up once the login button is clicked. This form was generated using an online form builder which provides an embed code for seamless integration onto websites. Below, you wi ...

Enzyme/Jest Testing Issue - Invariant Violation: The specified container is not a valid DOM element

I have recently started exploring unit testing and I am encountering the following error: Invariant Violation: Target container is not a DOM element. After reviewing my app.js file, I suspect that the issue lies with the line ReactDOM.render(, document.get ...

The Angular Google Maps Module fails to initialize

After updating angular-google-maps to version 2.0.1 via bower and adding the required dependencies (bluebird, jquery, loadash), I noticed that my app works fine when I comment out google-maps. This suggests that the issue lies with angular-google-maps. He ...

Modal obstructing BsDatePicker

<!-- The Server Modal --> <div class="modal" id="serverModal"> <div class="modal-dialog" style="max-width: 80%;overflow-y: initial !important;" > <div class=" ...

Node.js process.exec() function allows you to asynchronously spawn a subprocess

After writing the code, I ran it and found that the terminal was unresponsive with no output, causing the program to be stuck. var util=require('util') var exec=require('child_process').exec; exec('iostat 5',function(err,stdo ...

Angular controller unit testing is an essential practice in software development

I am currently working with an angular module named 'widgets'. In my app, I have used its signature as follows: var app = angular.module('widgets', [ 'widget.Panel', 'widget.List', 'services' ] ...

Exploring the concepts of express post and delete responses that are unclear

It appears that I am facing an issue where trying to access an attribute of an element from a JSON file returns null. Additionally, I am still encountering npm audit problems. What are your thoughts on this situation? Below is the code snippet that has be ...

Step-by-step guide on displaying SVG text on a DOM element using Angular 8

I have a FusionChart graph that I need to extract the image from and display it on the same HTML page when the user clicks on the "Get SVG String" button. I am able to retrieve the SVG text using this.chart.getSVGString() method, but I'm unsure of ho ...

Why won't my controller function fire with ng-click in AngularJS?

I'm having trouble getting a function to execute when my button is clicked. Despite the fact that this code appears correct, the function defined in my controller isn't being triggered. The code compiles without errors as shown in the console. A ...

Mastering TypeScript in Router Configuration

I am currently working with a standard router setup. type Routes = '/' | '/achievements' | ... ; This helps in identifying the routers present in the project. However, I am faced with a new challenge of creating an array that includes ...

React component performing AJAX requests

I have a React component that utilizes highcharts-react to display a chart fetched from an API using some of its state properties. export default class CandlestickChart extends React.Component { constructor (props) { super(props); this ...

Execute the extension exclusively within iframes

I'm developing a browser extension and I need certain parts of the code to only execute within iframes. Currently, all the code in my extension.js file is executed on both regular web pages and iframes. How can I identify whether the code is running w ...

Encountering an issue with Firebase Cloud Messaging

I am struggling to implement a push notification trigger whenever a document field is updated. As a newcomer to node.js, I am facing challenges in debugging what seems like a simple function. Below is the code snippet: // Cloud Functions for Firebase SDK ...

Typescript: Why Lines Are Not Rendering on Canvas When Using a For-Loop

What started out as a fun project to create a graphing utility quickly turned into a serious endeavor... My goal was simple - to create a line graph. Despite my efforts, attempting to use a for-loop in my TypeScript project resulted in no output. In the ...

The MongoDB regex is failing to provide the expected outcome

I'm facing an issue with searching data in MongoDB. I have a table with approximately 5000 entries of data that need to be searched based on multiple columns with specific priority criteria. The first priorities for the search are symbol, name, co_nam ...

when the submit button is clicked, verify whether the input field is empty

I have exhausted all my options and nothing seems to work. All I want is for the following functionality to be implemented: When a submit button is clicked -> check if a text field is empty -> if it is, display an error alert and prevent advancing t ...