Liang

I would like to control each cell's size that can be affected by the bg video's brightness ,

and here's the original topic that is from an idea that i want to try to accomplish a processing visual style by JItter.

https://cycling74.com/forums/which-object-in-jitter-is-corresponding-to-pixels-in-processing/

now i think maybe this is a better description for the topic.

I'm a bit of mess that if here the point is about matrix or gl.mesh ?

I would like to control each cell's size that can be affected by the bg video's brightness ,
and here's the original topic that is from an idea that i want to try to accomplish a processing visual style by JItter.
https://cycling74.com/forums/which-object-in-jitter-is-corresponding-to-pixels-in-processing/

here's the patch till now,
I'm a bit of mess that if here the point is about matrix or gl.mesh ?
Appreciate !


how-to-control-each-cells-size-in-a-matrix

I think this is kinda what you're going for but instead of using jit.gl.mesh it uses jit.gl.multiple and a single gridshape as a "base shape". As far as i know there is no way to set the point_size of jit.gl.mesh individually (if there is i'd love to hear about it :)

Yes, I agree with Luvulongtime. [jit.gl.multiple] should be optimal solution. Eventually you may also try to build a shader or use jit.gl.sketch for drawing.

why should we filp this matrix before it goes into gen ?

second, why jit.gl.multiple @targetname = test ?

and I dont really understand jit.gen , in the reference it says that "Generates new Jitter MOP objects from a patcher and code expressions. " what is MOP ? and how scaler control the base cell ?

So many questions here and thank you very much again !

and in this patch ,
why should we filp this matrix before it goes into gen ?
second, why jit.gl.multiple  @targetname = test ?
and I dont really understand jit.gen , in the reference it says that "Generates new Jitter MOP objects from a patcher and code expressions. " what is MOP ? and how scaler control the base cell ?

So many questions here and thank you very much again !


Targetname is what object the jit,gl.multiple should "draw".

Jit.gen can do everything that standard jit.op objects can do but is much much faster.

A vertex doesn't have a size its a point defined by its xyz coordinates. Lines are then drawn to each vertex to create a face.

If you mean size of each instance of jit.gl.multiple then you need to send jit.gl.multiple a 3 or 1 plane matrix to determine its size.

Targetname is what object the jit,gl.multiple should "draw".
Jit.gen can do everything that standard jit.op objects can do but is much much faster.
A vertex doesn't have a size its a point defined by its xyz coordinates. Lines are then drawn to each vertex to create a face.
If you mean size of each instance of jit.gl.multiple then you need to send jit.gl.multiple a 3 or 1 plane matrix to determine its size.


It was just something i had lying around that fit the question. Flipping is by no means necessary (plus it's still not done correctly lol) its just that Gl appears to flip (i think at least) incoming colorinfo and i simply dont like that :)

"Scaler" controls the base-cell here because it goes into the "scale"-input of gl.multiple. I used jit.gen to create both geometry (first outlet) and scale (second) but you can also just use a simple 1-cell jit.matrix to control the scale, see the attached patch.

Happy patching!EDIT: By no means expert btw

"Scaler" controls the base-cell here because it goes into the "scale"-input of gl.multiple. I used jit.gen to create both geometry (first outlet) and scale (second) but you can also just use a simple 1-cell jit.matrix to control the scale, see the attached patch. 

Happy patching!EDIT: By no means expert btw



I do not feel expert, but as I see together we can solve a problem which is rather complex. So maybe we - members of this forum - are together a "collective expert".

Anyway, this topic is very interesting for me, because Liang was touched an important question: some tasks are very simple if we want to solve them via traditional text-based coding and surprisingly problematic to implement inside graphical, node based environments (it's not related to Max only, it's common problem for languages based on this paradigm). It is probably a topic for separate and longer discussion, but I'm glad, that we can produce together some working solutions.

aha .. finally I see ! jit.gen is like a subpatch you write the parameter scaler there. I ve never use jit.gen or any Gen object until this time.

and for the targetname, I ignored jit.gl.gridshape totally !!!! uh................... thats why i confused about lot of things, why scale , what kind of things to be scaled , where's the dot ---the basecell , why i couldn't change tartgetname ... but main structures there ............ uh..............see that snapshot pic .... gl.gridshape is hidden on the right side ...

yay finally figure it out and learn something new !!!

aha .. finally I see !  jit.gen is like a subpatch  you write the parameter scaler there.  I ve never use jit.gen or any Gen object until this time. 

and for the targetname,  I ignored jit.gl.gridshape totally !!!! uh...................   thats why i confused about lot of things, why scale ,  what kind of things to be scaled , where's the dot ---the basecell , why i couldn't change tartgetname ... but main structures there ............  uh..............see that snapshot pic ....  gl.gridshape is hidden on the right side ...

yay finally figure it out and learn something new !!!


1, changing each cell's colour ---- let the base cell have different colour in the matrix ?

2, changing the shape of each cell's ? ---- for instance circle , sphere, rectangle , as a sequence distributed in the matrix ?

ps: attached pic is snapshot of node box example . it's a kind of way that i study ... by comparison ....... to getting understand the logic .......

could it be extended here:
1, changing each cell's colour ---- let the base cell have different colour in the matrix ?
2, changing the shape of each cell's ? ---- for instance circle , sphere, rectangle , as a sequence distributed in the matrix ?  

ps: attached pic is snapshot of node box example . it's a kind of way that i study ... by comparison ....... to getting understand the logic .......


snorm --- coordinates xyz ,z is useless here, matrix xy.

in 2 ----- rgb2luma's value , multiply scaler ----- constant restricts a reasonable value for the base cell's size.

out1 out2 go to gl.multiple , 2 parameters do multiplication, positon and scale, p is the matrix from gen out1, scale is from gen out2 and set gridshape test as the target.

pic multiple.study, ---- jit.gl.multiple help

can set more parameters(here's 5 ), third inlet---- texture array ----- [p InitialGLParams ] ---- inside ------ pic setall goes to texture array.

guess here can change each cells texture ?

analysis
pic gen.inside :
snorm --- coordinates  xyz ,z is useless here,  matrix xy.
in 2 ----- rgb2luma's value , multiply scaler ----- constant restricts a reasonable value for the base cell's size.
out1 out2 go to gl.multiple ,   2 parameters do multiplication,  positon and scale, p is the matrix from gen out1, scale is from gen out2 and set gridshape test as the target.

then
pic multiple.study, ---- jit.gl.multiple help
can set more parameters(here's 5 ),  third inlet---- texture array  -----    [p InitialGLParams ]   ---- inside ------   pic setall  goes to texture array.
guess here can change each cells texture ?


if anything wrong here, please correct me

here i marked three parts, u can check the pic ,

its all about jit.multiple, u add 2 more variable parameters here, color & texture,

actually we can just make this kind of flashing dot effect by changing the color quickly without any texture.

if I want to change each cell's color, the [get cell], [set cell] objs here u already show me in the patch above.

and there is 4 different textures here in total, include "change a single cell texture" . its different from @color in jit.multiple's params.

M try to understand set cell here, by trying to control each cell's color, focus on set cells, there's 3 vars, row, line, value. if lines or rows value is more than {10 10} generated by jit.noise , its nothing change in the rendering window.

By changing the paras in setcell , its different to what i imagine. as u can see in the 3rd snapshot, set cell 0,0, 249. the 1st cell has nothing change in the left upper corner . but if i adjust the second para there, randomly , just drag my mouse up and down, the 1st row of the cell changed. why ? it must not row line value. and i jit.matrix help I couldnt made any changing too.

It seems that I am not very clear about this.

here i marked three parts, u can check the pic ,
its all about jit.multiple, u add 2 more variable parameters here,  color & texture,
actually we can just make this kind of flashing dot effect by changing the color quickly without any texture. 

if I want to change each cell's color,  the [get cell], [set cell] objs here u already show me in the patch above.
and there is 4 different textures here in total,  include "change a single cell texture" . its different from  @color in jit.multiple's params.

M try to understand  set cell here, by trying to control each cell's color,  focus on  set cells,  there's 3 vars,   row,  line, value.  if lines or rows value is more than {10 10} generated by jit.noise , its nothing change in the rendering window.
By changing the paras in setcell , its different to what i imagine.  as u can see in the 3rd snapshot, set cell 0,0, 249.  the 1st cell has nothing change in the left upper corner  . but if i adjust the second para there,  randomly , just drag my mouse up and down, the 1st row of the cell changed.  why ?  it must not row line value. and i jit.matrix help I couldnt made any changing too.
It seems that I am not very clear about this.


Here's a patch to clearify, maybe I should make it into a wiki I'll try tomorrow. It's getting pretty late here.

Here's a patch to clearify, maybe I should make it into a wiki I'll try tomorrow. It's getting pretty late here.
Hope this helps clarify things 


You've really helped me a lot!
Thank you so much Phiol and good night .


How to control each cell's size in a matrix generated gl.mesh ?