webgl | Functional rendering with WebGL in Elm | Graphics library

WebGL is a cross-platform, open web standard for a low-level 3D graphics API based on OpenGL ES, exposed to ECMAScript via the HTML5 Canvas element. WebGL at it's core is a Shader-based API using GLSL, with constructs that are semantically similar to those of the underlying OpenGL ES API. It follows the OpenGL ES specification, with some exceptions for the out of memory-managed languages such as JavaScript. WebGL 1.0 exposes the OpenGL ES 2.0 feature set; WebGL 2.0 exposes the OpenGL ES 3.0 API.

Now, with the availability of Selenium Stealth building of Undetectable Scraper using Selenium driven ChromeDriver initiated google-chrome Browsing Context have become much more easier.

selenium-stealth is a python package selenium-stealth to prevent detection. This programme tries to make python selenium more stealthy. However, as of now selenium-stealth only support Selenium Chrome.

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I've finally sorted out. I can't really understand why works this way but I didn't need quaternion at all, and my first intuition of using matrix multiplications to apply rotation on 3-axis was correct.

What I did miss in first instance (and made my life miserable) is that matrix multiplication is not commutative. This means that applying rotation on x, y and z-axis is not equivalent to apply same rotation angle on z, y and x.

The working solution has been achieved with 3 simple steps:

1. Replace quaternion with matrix multiplications using vectors (method #resize2)
2. Rotating the drawing plane with Z-Y-X order
3. Doing the math of rotation in X-Y-Z order

Not sure if this is related but I added Pixi to my Svelte project (based on the official Svelte starter template using rollup) and I started to get this error:

you have to move your unitybuid folder as child of Public file, as this /public/Build/yourfiles.json

i am havinbg problems after that, it runs well on local host, but when building on a hosting sites, it doesnt loading for me.

Edit: As it has been pointed out, first two sections of this answer are completely wrong.

TLDR: This might not be feasible without a backend server first fetching the video data.

If you check the MDN tutorial you followed, the video object passed to texImage2D is actually an MP4 video. However, in your script, the video object you have access to (document.getElementsByTagName("video")[0]) is just a DOM object. You don't have the actual video data. And it is not easy to get access to that for YouTube. The YouTube player do not fetch the video data in one shot, rather the YouTube streaming server makes sure to stream chunks of the video. I am not absolutely sure on this, but I think it'll be very difficult to work around this if your goal is to have a real time video effects. I found some discussion on this (link1, link2) which might help.

That being said, there are some issues in your code from WebGL perspective. Ideally the code you have should be showing a blue rectangle as that is the texture data you are creating, instead of the initial glClearColor color. And after the video starts to play, it should switch to the video texture (which will show as black due to the issue I have explained above).

I think it is due to the way you had setup your position data and doing clip space calculation in the shader. That can be skipped to directly send normalized device coordinate position data. Here is the updated code, with some cleaning up to make it shorter, which behaves as expected:

You should not use #if to test an undefined macro. The warning implies that you should use #ifdef instead.

You may not define a previously defined macro. You could first undefined the old definition, but that's rarely a good idea.

Using ifdef helps to get rid of the first warning, but the second one is still in place

In c++23 you will be able to use #elifdef instead.

Otherwise, you can use #elif defined(the_macro).

Your canvas is there, but it's not on-top. Set some additional CSS for positioning. For example:

In general, rendering a mesh with multiple materials is possible in three.js if the geometry defines proper groups data. However you normally render different parts of the mesh with distinct materials. E.g. when having a character model, you would render the skin with one material and the cloths with a different one.

You don't want to use this approach to combine or stack effects. Instead, you have to implement a single custom shader that includes all effects that you want to apply on the surface.

For integral data the format argument must be gl.RED_INTEGER:

gl.texImage2D(gl.TEXTURE_2D, 0, gl.R16I, width, height, 0, gl.RED, gl.SHORT, image);