Spector.js | Explore and Troubleshoot your WebGL scenes with ease | Augmented Reality library
kandi X-RAY | Spector.js Summary
kandi X-RAY | Spector.js Summary
Explore and Troubleshoot your WebGL scenes with ease.
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Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of Spector.js
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Spector.js Examples and Code Snippets
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Trending Discussions on Spector.js
QUESTION
I'm trying to write a simple program in WebGL and javascript to draw a simple object from .obj files. I'm using npm's webgl-obj-loader to load the objects. As the title says I keep getting Insufficient buffer size (Edge) and index buffer too small(FF). I used gl.geterror function and I'm getting 1282 error code which means INVALID_OPERATION.
...ANSWER
Answered 2021-Apr-13 at 13:30Ok for some reason I had to add new type of array in the bufferdata function, like this.
QUESTION
I'm using Laravel 8 with Laravel-mix so that my JS assets are compiled with webpack.
I have imported gojs successfully by doing this:
ANSWER
Answered 2021-Apr-13 at 13:54It's best to copy extension files into your own directory to use them. They are provided as examples of how to extend the library, and should not be imported directly.
If you look at extension code, you'll see it carries this warning:
QUESTION
I'm using MapboxGL to render geojson as a polygon onto a map. The page loads and renders correctly but when I move the map around, I get this error after some number (usually between ~30-100) of render calls and the polygon disappears.
GL_INVALID_OPERATION: Insufficient buffer size. (Chrome)
WebGL warning: drawElementsInstanced: Index buffer too small. (FF)
I've managed to (I think) narrow it down to an issue with
...ANSWER
Answered 2020-Sep-12 at 02:09The problem looks to me like you're not setting the ELEMENT_ARRAY_BUFFER when you render.
if you're not using vertex arrays (which you're not) then attributes and buffer bindings are global state. So if something changes that state between the time you initialize things and the time you render things (like mapbox rendering its stuff) then when you render you'll be using different buffers than you setup in init.
Try adding
QUESTION
I am learning WebGL and I can feel that my speed is so slow because I am having a hard time debugging my code. Is there any extension or tool with help of which I can know the value of buffer, attribpointer, matrixes, etc.
I googled and learned about chrome extension spector.js but this does not work with me. I think it supposes to show me frames or context but when I click it shows nothing.
When I click red button after a few seconds it shows: No frames detected. Try moving the camera or implementing requestAnimationFrame. ...
ANSWER
Answered 2020-Jun-25 at 00:43Yes, WebGL is hard to debug and I'm not sure anything will make it a whole lot easier. Most bugs are not something a debugger can find that easily. Certain bugs like un-renderable textures or buffers on the correct size already get reported by the browser. Other bugs though are usually math bugs, logic bugs, or data bugs. For example there is no easy way to step through a WebGL shader.
In any case, if you want to use spector you need to structure your code to be spector friendly. Spector is looking for frames based on requestAnimationFrame.
So, let's take this example which is the last example from this page.
The code has a main function that looks like this
QUESTION
I want to use spector.js metadata API to simplify debugging of a WebGL application compiled from C++ using emscripten. Spector.js API expects JavaScript WebGLBuffer objects created via WebGL API. The question is how to get them from the C++ side which operates with raw OpenGL handles. I see two options:
- Provide gl buffer handles to js via emscripten C++<->JS API and create WebGL objects from them somehow
- Create WebGLBufers on the js side and provide handles to C++ via C++<->JS API
Problem with the first option is that I can't find a way to create a WebGLBuffer from a raw OpenGL buffer handle. Problem with the second option is that I don't see any way to get a raw gl buffer handle from the js WebGLBuffer object to forward it to the C++ code.
Maybe there are also other options?
...ANSWER
Answered 2020-Mar-04 at 15:52Augment the emscripten library. The WebGLObjects are tracked right here
For example
QUESTION
I am building on sample 16 from Github/Webchat to build a webpage with a webchat interface.
The react app consists off different .js files to build the website( Webchat.js, Instuctor.js, App.js, Index.js) and I can't provide file Inspector.js with the data I gathered in file Webchat.js.
I can't find the right code to read the value of a variable from file Webchat.js in file Inspector.js.
I want to build a Webpage where I have on the left side a Chatbot (BotFrameWork) running, and next to it a table running which shows data that has been collected by the chatbot.
I tried answers from
how to get a variable from a file to another file in node.js
but doesn't work.
I tried to get the state of Webchat but gives only undefined.
Example: (webchat.js) I fetched data from the bot (like [link]How to create a side window or iframe that shows data that was gathered by a Web-Chat in one web page?) and saved it in a state variable 'test'.
(instructor.js) I want to show that data e.g. in a label that is getting updated when new data comes in. How do I get access now to the value of 'test' that is created in another file?
What doesnt work: in instuctor.js:
var test2 = require ('./webchat'); Console.log(test2.state.test) //this is how I imagine it to work --> undefined with require I only get an object that has a 'name' variable 'Webchat' and which i can get out with: console.log(test2.default.name);
...ANSWER
Answered 2019-May-09 at 18:08React only supports one-way data binding, so if you want to share a variable between multiple components, you need to elevate the state to the parent and pass the variable and change handlers to the children as props.
In the example below, Parent has two children: ChildA and ChildB. We could keep myValue in ChildA's state, but then ChildB wouldn't be able to access it, so we elevate myValue to the parent and pass it to both children as props. We also, pass a change handler to ChildB so it can update the value when the user clicks it.
QUESTION
I'm trying to implement an infinite scrolling but I can't get document.body.scrollHeight or window.scrollY or window.pageYOffset to work in my app. I've tried it by inspecting wikipedia and other sites and it works fine, but for some reason it just doesn't work in my React app. Can anyone help?
Inspection - React - Fail
Inspection - Other apps e.g. Wikipedia - Works
App logging - React - Fail
I've since tried finding this scrollY property in other React applications but still nothing. Always logs 0 in a react app.
As you can see in the image, the scrollbar is clearly not at the top.
...ANSWER
Answered 2017-Jan-13 at 08:18Problem solved! It turns out you cannot use height: 100% if you want to use the scrollY prop as well. If you're using a library, like I was using simple-grid that comes with the html, body: {height: 100%}, you have to remove it.
QUESTION
I need to clone an Ionic 4 component with StencilJS, then...
I just created the repository:
https://github.com/napolev/custom-range
based on the repository:
https://github.com/ionic-team/stencil-component-starter
then copied the Ionic component range:
https://github.com/ionic-team/ionic/tree/master/core/src/components/range
to:
...ANSWER
Answered 2018-Aug-25 at 21:22Yes you have missing folders and files:
Download them from here: https://github.com/ionic-team/ionic/tree/master/core/src
Edit:
or add the following dependencies:
QUESTION
Debugging a web page running in Chrome on Android (Galaxy S8) via the USB connection in the latest version of the Chrome desktop browser is not working. Attempting to inspect web pages running on the mobile device results in a blank page.
When I inspect the blank page that appears in the desktop Chrome browser, I get the following error:
...ANSWER
Answered 2018-Apr-13 at 14:19Same problem here. But I found a solution to my case. Before trying the solution I'm gonna present here, tried restarting chrome both desktop and android, restarting phone. Disabling some experimental flags on about://flags cause I was suspecting on some of those. But none of these steps solved.
Then I see the Chrome on Android was v65 and my Desktop was v64.
So:
- Removed Chrome version 64.0.3282.186-1 with dpkg -r google-chrome-stable
- Downloaded latest version from https://www.google.com/chrome/
- ..and installed Chrome version 65.0.3325.181-1 with dpkg -i google-chrome-stable_current_amd64.deb
Before:
QUESTION
Flow seems to generate a lot of errors on a new project. What am I doing wrong ?
What I did:- Created a new React Native project using
react-native init FlowProject - Followed the set-up for Flow with yarn and Babel
yarn add --dev babel-cli babel-preset-flowyarn add --dev flow-bin
- Ran
yarn run flow(.flowconfig was generated by the init)
Here is the error I get:
...ANSWER
Answered 2018-Jan-10 at 11:44You cannot delete the React Native .flowconfig, because it defines a lot of custom configuration required for the project to typecheck cleanly.
Let's instead look at the initial error:
.flowconfig:53 Unsupported option specified! (unsafe.enable_getters_and_setters) error Command failed with exit code 8.
This is caused by the version of Flow you installed with yarn add flow-bin no longer supporting this option (It was removed in 0.62). You'll need to install the exact version of Flow defined on the last line of your .flowconfig
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