I have been curious about the terms "offsets" and "indices / index" for some time now. I noticed that offsets are mentioned in https://github.com/mrdoob/three.js/blob/dev/src/core/BufferGeometry.js, and indices were previously mentioned in IndexedGeometry, although I am currently unable to locate it in the dev tree. While indices may seem straightforward, I am interested in hearing an official explanation rather than interpreting it myself by delving into the code.
Thank you!
There are a couple of methods for defining geometries:
Non-Indexed
"vertices": [ 0, 1, 2, 3, 4, 5, 6, 7, 8, ... ],
"normals": [ 0, 1, 2, 3, 4, 5, 6, 7, 8, ... ]
In this mode, each triangle position is explicitly defined and data cannot be reused.
triangle 0: [ 0, 1, 2, 3, 4, 5, 6, 7, 8 ]
Indexed
"indices": [ 0, 1, 2, ... ],
"vertices": [ 0, 1, 2, 3, 4, 5, 6, 7, 8, ... ],
"normals": [ 0, 1, 2, 3, 4, 5, 6, 7, 8, ... ]
In this mode, indices determine the order of the data. The first triangle uses indices 0, 1, and 2. These indices are used to access the corresponding vertices and normals data:
triangle 0: [ 0, 1, 2, 3, 4, 5, 6, 7, 8 ]
The primary advantage of indexed method is the ability to reuse data and reduce the amount of data sent to the GPU:
"indices": [ 0, 0, 0, ... ],
"vertices": [ 0, 1, 2, 3, 4, 5, 6, 7, 8, ... ]
triangle 0: [ 0, 1, 2, 0, 1, 2, 0, 1, 2 ]
Regarding offsets...
Using offsets allows you to render specific ranges of your geometry. Instead of rendering from triangle 0 to triangle.length, you can choose to render from triangle 200 to triangle 400.
I am working on a component where I receive data from the backend and attempt to populate a DataGrid with it. Below is the code for this component: export const CompaniesHouseContainer: React.FC<Props> = () => { const classes = useStyl ...
Having an issue with validation, here is the code snippet: routes.js var express = require('express'); var router = express.Router(); var hello_controller = require('../api/controllers/helloController'); var { validationRules, validat ...
How can I create a div that automatically scrolls to the bottom on hover? I tried implementing the code below, but it doesn't work as expected. It jumps to the bottom of the div's height on first hover and transitions smoothly on second hover. . ...
A situation is in front of me: var express = require('express'); var router = express.Router(); var articles = require('../model/articles.js'); router.get('/all', function(req, res, next) { res.json(articles.getAll()); ...
I am currently working on a responsive website that uses liquid layouts. I have encountered challenges when incorporating images in the design, especially when dealing with different browsers like IE, Firefox, and Chrome. Recently, I faced another issue w ...
I'm facing some challenges with Angular unit testing as I am not very proficient in it. Specifically, I am struggling to set up a simple unit test. Here is my Class: class CampaignController { constructor($state) { this.$state = $state; ...
When I tried using Array.prototype.join on a multidimensional array, I encountered a surprising result. To investigate further, I looked into the inner workings of Array.prototype.join and found it to be native code. [1,2,3,4,5,6,7,8].join('') [ ...
Is there a way to eliminate the white space in between elements during animation? Should I wrap both divs into another div to achieve this? I am using position-top to adjust my div animations. Could this be causing the issue? What other methods can you s ...
Currently, I have the following data stored in a JavaScript variable: "{'Headings': [{'name': 'Behavior', 'majorTopic': 'N', 'vote': {'down': 1, 'up': 1}}, {'na ...
I am a beginner when it comes to d3js and javascript in general. My goal is to create an interactive IP administration overview using d3js by modeling json data. I know that the key tool for this job is likely d3.layout.tree, which will provide me with the ...
There is a function in my view that transfers a value from a text box to a table on the page. This function updates the URL and calls another function called update_verified_phone(). The update_verified_phone() function uses a model called user_info_model( ...
My main goal with this code is to successfully console.log(createdAnimal) and have the objectAnimal with specific parameters printed out. The following code snippet demonstrates the desired parameters: animalMaker('cat','flying',true); ...
Is there a command-line tool in Linux that can identify basic syntax errors and compile time errors in JavaScript files intended for web browsers? Usually, I write my JavaScript code alongside server-side languages like Ruby or Perl. It would be beneficia ...
In order to add sizing functionality to a badge component, I have developed the following approach: import React from 'react'; import Badge from 'react-bootstrap/Badge'; import classNames from 'classnames'; const CustomBadge ...
I've been facing a problem while trying to send a JSON object to the server using AJAX calls. I keep getting a 404 Bad Request error. The issue seems to be related to the fact that I have a form where I convert the form data into a JSON object, but th ...
Currently working with TypeScript and I have a query regarding the utilization of TypeScript interface. Is there a way to selectively extract and output specific key types from the interface being used? While I am able to isolate the type I need, I am inte ...
I am currently working on a project involving a Three.js scene where I need to update textures after a certain period of time. However, I have noticed that updating the textures is causing a significant slowdown in the FPS, dropping it to 1-2 FPS for sever ...
My current project involves creating a scavenger hunt editor with various types of questions stored in an array. Each question can be of a different type, all displayed using ng-repeat. To achieve this, I utilize a JavaScript object representing a Questio ...
I am having an issue with my JavaScript code. I don't receive any errors, but when I click the submit button, nothing happens. I have followed a video tutorial and watched it twice, but I can't seem to figure out what is wrong here. Here is the ...
After replicating the code from http://datatables.net/release-datatables/extensions/TableTools/examples/simple.html in my Visual Studio project, I organized the files by saving two css files as style1.css and style2.css, along with three js files named sc ...