Matrix.NET | NET implementation of matrices and their operations | Math library

I want to write applications in JavaScript that require a large amount of numerical computation. However, I'm very confused about the state of efficient linear-algebra-like computation in client-side JavaScript. There seems to be many approaches, but no clear indication of their readiness. Most of them seem to have restrictions of the size of vectors and matrices allowed for computation.

Obviously allows for vector and matrix computations on the GPU, but I'm not clear on the limitations. Attempted wrappers around this library seem to limit size of matrices and vectors. Is this a practical limitation (browsers don't support anything else) or just a development limitation (someone need to write the code)?

WebCL is a proposed browser-level implementation of OpenCL, but appears to be stuck in development.

Apple has recently put forth an alternative to WebCL called WebGPU. So far, there is a prototype and demos, but it's not clear to me if this will see wide adoption.

Mozilla has put out an API for SIMD operations, but it only has experimental support.

Are vectorized computations on the browser-side supported by JavaScript?

Notes:

• My question is not "What's a good library for numerical computation in JavaScript" but "Are vectorized operations possible in JavaScript?" An acceptable answer would link to a demo of vectorized computation working in a non-experimental browser.

• I may be getting SIMD, vectorization and GPU computation confused. I thought it was okay to use them synonymously in this context, given they all allow for efficient computations involving high-dimensional vectors using hardware acceleration.

I am using the gl-matrix library. For linear algebra calculations

I have a view and projection matrix that I used for my camera in a 3d engine. The view is a lookat matrix.

I would like to search in a XML-File for Nodes, that have the name "Reference". The inner Text of these nodes are other xml-Files. I also want to parse these xml-Files for the same nodes ("Reference").

I use some methods to set the name and Path of the references I found, but I don't know how to do it recursive.

The class, where I search and set the Name and Path of the reference I found in the XML

Code: https://plnkr.co/edit/QNA31hMYnIJwotwbaDhT?p=preview

Question: How can I interpolate all properties of fromRotationTranslationScaleOrigin from gl-matrixin draw function of this cube?

Let's interpolate over 3 seconds: from:

I use the glMatrix's method: mat4.lookAt(out, eye, center, up) to set a camera view when a WebGL model is rendering.

After the model is rendered, I need to retrieve the center attribute from view/perspective matrix. I know how to retrieve the eye attribute, but I have no idea how to get the center one. How can I do that?

This is the mat4.lookAt method I use: http://glmatrix.net/docs/mat4.js.html#line1366

I have a cube in GL in this plunkr that looks like this:

I would like to scale, rotate and translate the cube from a pivot. to hopefully make it animate like https://www.youtube.com/watch?v=sZeBm8EM3mw&feature=youtu.be

For this transformation I'll be using: gl-matrix. luckily this transformation has a method for this under mat4.fromRotationTranslationScale()

Problem is I'm have a hell of a time just using the method? No errors, just the default implementation removed the cube from the screen.

I have some data in a Uint8array, ( a list of 3d x,y,z coordinates). I need to perform some floating point operations on. (matrix rotation transform multiplication) on this 3d vectors. I am using the http://glmatrix.net/ library for the calculations.

The data is coming from a 3rd party API that packages it as Uint8Array The vertex data is formatted in sets of 8 [x,y,z,w,r,g,b,a]

Up until now, I have been performing this operation on the GPU, passing this Uint8array and the rotation matrix to GLSL. I am moving the operation to a CPU based script that is executed offline.

Update Another piece of the equation. The offline script is a node.js CLI script that writes the final buffer to stdout and eventually to a file using the unix > operator. I then load this in the final app and wrap the arrayBuffer with a typedArray constructor.

When executed in GLSL, the operation looks like:

matrix * vec4(vert.x, vert.y, vert.z, 1.0)

and my results look like:

Now on the CPU My current code attempt is:

As part of rewriting my game engine in cython, I am trying to improve the performance of my python+numpy classes for matrix and vector math as this was one of the major bottlenecks I had run into previously. This group of modules had defined classes for types such as Vector2/3/4, Matrix2/3/4, and Quaternion.

Taking a page from the glMatrix javascript library, I thought that one thing I could do this time around is switch away from a class-based system to a module with just a bunch of math functions to reduce more overhead. That way, instead of returning a new object every time I, say, added two vectors together, I would not have to construct a custom object.

To test this out, I wrote a benchmark demo for creating two Vec2 objects a and b summing them component-wise to get a Vec2 object out. The code for this is broken down into a main.py that does the timing, a vec2.pyx for the cython code, and a pyvec2.py for the python code. Here is the code for each of those components:

main.py