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Vincent Goudard

https://en.wikipedia.org/wiki/Hungarian_algorithm

) in jitter. Basically, a NxN matrix as input would return a size N vector with the colums indices for each row that minimize the cost (as expressed in the input matrix).

The steps to the algorithm are described 

, but the iteration process makes it inconvenient with usual objects.  However, I don't really like the idea of externals, and would prefer a vanilla Max solution.

What do you think would be the best way to implement that?

jit.gen ?  javascript ? node.script ? else ?

Hi,

I want to use the Hungarian algorithm (https://en.wikipedia.org/wiki/Hungarian_algorithm) in jitter. Basically, a NxN matrix as input...

hungarian-algorithm-on-jitmatrix

Hungarian algorithm on jit.matrix

dirkdebruin

I have been able to render a true 360° image by changing the camera rotation for each pixel in the image and saving the 1x1 pixel texture in a matrix using setcell. Obviously this is very slow since I have to render the entire world again for each pixel in the image. What would be a quicker way to do this? I have been able to record 360° videos in 8K using 4 cameras (

) but the resampling of the textures results in some distortion and there is always an empty spot in the top and bottom of the image. Also I would like to move the camera around ever so slightly for each pixel (or each column of pixels) to enable "true" omni directional stereo imaging. That will not work properly with 4 cameras or any amount of cameras that is less than the amount of pixels in a row. Does anyone have some thoughts about this?

This is my current (slow!) true 360 patch:

true-360-video

true 360° video

Conall Ó Maoláin

I have multiple text instances which are positioned using the coordinates of a sphere. I like to rotate each instance around the centre point of the sphere so that the text still faces outward and is oriented the right way up. Any suggestions?

Hello,

I have multiple text instances which are positioned using the coordinates of a sphere. I like to rotate each instance around the...

rotate-instances-around-a-point

Rotate instances around a point

Esteban Lanter

I am trying to port some GLSL-based Shadertoy shaders to max msp using jit.gl.slab. While most are straightforward to port by re-assigning bindings, some make use of bitwise operaters such as >>, <<, &. These appear to only to be supported starting at GLSL 1.3. My specific case:

inside a *.jxs file, this method is used to draw digits - capturing the individual pixels using the binary representations of decimals (here a 6x4 grid):

//p.x and p.y capture the position in a 6x4 pixel grid

//d selects one of the digits in the array

float res = float((temp[d]>>p.x+p.y*4)&1);

Does anyone know a solution to porting this?

I am trying to port some GLSL-based Shadertoy shaders to max msp using jit.gl.slab.  While most are straightforward to port by re-assigning 

glsl-bitwise-operators-in-jit-gl-slab

GLSL bitwise operators in jit.gl.slab

little_wizard

I've noticed that when using the jit.gl.textureset or jit.fx.delay objects, which are used to temporarily store texture frames in memory to create a delayed texture output, something that I didn't expect happens (i'm using max9 right now) . 

From what I’ve understood so far, these objects operate within the GL context and therefore use the GPU to process data. 

, when I increase the size of the input texture (for example, from @dim 1920 1080 to @dim 4000 2000), and to make the result even more extreme I also increase the maximum number of delay frames, while the VRAM increases a bit as expected, 

This considerable increase in standard RAM  doesn't happen using other jit.gl objects (e.g. jit.gl.pix).

 Is this something that happens only to me, or does it happen to everyone? Is it true that jit.gl.textureset and jit.fx.delay run on the GPU but store at least part of the texture data in regular RAM? Was it designed this way specifically to avoid saturating the VRAM?

I want to know these things because I need to understand how much RAM and VRAM i'm using in what I do.

About memory allocation using jit.gl.textureset and jit.fx.delay

about-memory-allocation-using-jitgltextureset-and-jitfxdelay

Diemo Schwarz

Hi,  I need to transfer a jit.matrixset with 315 HD images to a jit.gl.textureset, but I must be doing something wrong here, since loading the matrixset from jxf takes only 3512 ms CPU time, but the copy to the textureset takes 10015 ms !!!!

Can I better prepare  the textureset or the matrixset to speed up copying? 

 (the matrixset is 3 plane rgb for saving space; I don't need transparency in the textures, only while compositing layers.  I stumbled over mentions of uyvy being faster than argb. Is this relevant here?)

Do I need to do the copy asynchronously (loading does lock up the graphics for ~15s)?

Is there a way to load a jxf from disk into the textureset directly?

I'm still on Intel MBP 13" with Intel Iris Plus Graphics 655 with only 1536 MB VRAM.   I understand that this problem is completely moot with AppleSilicon's unified memory, but my M3 is only arriving after the next gig...  =-(

Sorry for my incomplete background knowledge on graphics and OpenGL, always willing to learn!

Hi,  I need to transfer a jit.matrixset with 315 HD images to a jit.gl.textureset, but I must be doing something wrong here, since loading...

how-to-accelerate-copying-a-matrixset-to-a-textureset

How to accelerate copying a matrixset to a textureset?

Andro

After not getting mat3 functions to work in jit.gl.pix I've decided to give making shaders in jit.gl.slab another go.

So all i want to do is this (code from the book of shaders), hello world :)

    vec2 st = gl_FragCoord.xy/u_resolution;

    gl_FragColor = vec4(st.x,st.y,0.0,1.0);

I just want to get the normalized co-ordinates (the green yellow representation)

I cannot find anywhere a clear example on how to get pixel co-ordinates and the resolution.

Jitter Forum