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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?

Little-P

I have a problem, which i do not understand - this behaviour makes no sense to me.

I want my texture to be displayed always in the incoming aspect ratio indepedent of the dim and size values of the world object.

Hello Everyone!

I have a problem, which i do not understand - this behaviour makes no sense to me.

My Problem:

i play a video into a...

changing-jitworld-size-without-affecting-aspect-ratio

Changing jit.world size without affecting aspect ratio

Riccardo Carbone

Really like the Polish Your Pixels package, and the Max 9 amazing improvements in jitter, and have seen some of the visuals being produced on the youtube shorts, and really impressed! Great work, very inspiring.

I have been trying to get to grips with the tutorial viewer in polish your pixels, and have had some great results (in my opinion!), but I have been struggling to figure out how to use the jit.gl.pass object with @fxname dof-hq properly. 

I was using a gl.gridshape going into to a gl.multiple to produce lots of shapes, and then have some in and out of focus, much like the examples look like in the scale and distance tutorial viewer side bar. But I wasn't able to get anything like it. I also tried to use the same settings I could see being used in the tutorial. The focus controls seems to bring all of the shapes in or out of focus. I even just tried with 2 gridshapes, positioned quite far apart on the z axis to see if I could see the focus 'working', but had the same result, again everything in or out of focus. Also when I use the 'show in focus' toggle everything disappears.

So I think my question is, am I using the wrong object (gridshape) to try to see this camera focus effect? Do I have to use a setting in the 

 to enable this? Does the @position of the gridshape not effect it's 3d depth in the depth of field fx? Are the patches used in polish your pixels available somewhere? I'm using a windows 11 machine.

Hi All,

Really like the Polish Your Pixels package, and the Max 9 amazing improvements in jitter, and have seen some of the visuals being...

depth-of-field-jitglpass-questions

Depth of Field jit.gl.pass Questions?

Chris Perren

I am a relative beginner to Max, first time posting on the forum. Thanks in advance for any assistance. 

I am creating a video tool which displays 12 instances of the same video across a single screen, with each video playing at a different speed. 

To make this happen, I've arrived at a setup where I have 12 jit.gl.movie objects, feeding into 12 jit.gl.videoplane objects, writing to a single jit.world.

I have made parameters to spread the videos spatially (i.e. evenly distribute) across 

For the most part, this all works ok. The videos all show up fine and the spatial distribution works. 

The issue I am having is with what seems to be a kind of grouping or chunking behaviour in the way that the multiple videos are rendered. For example: 

When the videos are overlapping on the x plane, I would expect them to all overlap in the same direction (like fanning cards), but they seem to overlap randomly. To get them to fan out like cards, I have to put a non-zero value into the 

 spread, so that they're actually in order in front of one another in space.

I can live with that workaround, however, the next issue (which feels related to me) occurs when I use blending. For example, when I set all my jit.gl.videoplane Blend Enable attributes to 'ON', and Blend attributes to 'add', I get this:

I'm not sure if I have misunderstood something, but I would expect the additive blending effect to compound across all videos. To me this looks like the first four videos from the left are additively blending, but then the four in the middle are normal, then a bit more additive blending in the last four panels but not in the way I would expect.

Does anyone have an explanation for what might cause the jit.gl.videoplane objects to display this way? Or whether there's a way to force them to render in a particular order, or to blend globally?

I think it probably isn't important, but just in case it is, I have a jit.gl.slab in between each of the jit.gl.movie/jit.gl.videoplane pairs, running the shader 'cc.brcosa.jxs'.  

Hi friends, 

I am a relative beginner to Max, first time posting on the forum. Thanks in advance for any assistance. 

I am creating a...

order-of-rendering-multiple-jitglvideoplane-objects

Order of rendering multiple jit.gl.videoplane objects

James Harkins

There is something (well, probably a lot of things) that I don't understand about alpha blending in 

 and rgb2luma it to replace the original alpha. A jit.alphablend proves to me that the alpha is being calculated and processed correctly.

Then I pass the alpha-ized matrices into 

.gridshape correctly renders the RGB planes if @blend_enable is off.

I've got a green background at 0, 0, -0.1, and the texture is being applied to a 

.gridshape (plane) at 0, 0, 0. What I thought would happen when I enable blending is that the green background would shine through the low alpha areas. That is, if the texture makes parts of the shape transparent, shouldn't you be able to see through that to whatever is behind?

Instead I saw a couple of different behaviors: either the gridshape simply disappears (which I'd say could be like the alpha channel is being treated as all 0, but, can't see why), or it turns gray and doesn't show the texture at all.

I tried several different blend modes but none of them do, well, 

. I got a whole bunch of weird gray scale manipulations but nothing intuitive.

I'll admit here to not being confident in OpenGL basic concepts (I'm an audio guy, poor visual arts sense, 

 a graphics specialist at all), but, when I used transparent textures in Pd+Gem, I could just see right through the object as one would expect. So clearly OpenGL can do it, just not with the default settings in Max.

There is something (well, probably a lot of things) that I don't understand about alpha blending in jit.gl.*.

I read in traffic.mov and...

jitgl-textures-transparency

jit.gl, textures, transparency

Hi, I'm new to jit physics and managed a first mass–spring model, but would like to change the speed of the movements dynamically (but keep the same frame rate). I tried fixedtimestep, but this is not changing the simulation time step.

Jitter Forum