Add:

FRONT viewmat A
RIGHT viewmat A

Sorry for the fast escape...

Linda   

-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Linda Alvord
Sent: Sunday, June 14, 2015 3:52 AM
To: [email protected]
Subject: Re: [Jprogramming] Trouble making patter for a color cube

I have isolate the problem with YELLOW!

Look at FRONT in the top left 5x5 square. It shows yellow and magenta
creating red with an error.

Look at RIGHT in the top left 5x5 square. It shows the right faceof the
colorcube correctly.



load 'viewmat'
N=:<.63.8*i.5
MAGENTA=:(N,4#255),.((4#0),N),.N,4#255
YELLOW=:(2#"1 ,.N,4#255) ,.(4#0),N
CYAN=:((4#0),N),.2#"1 ,.N,4#255
A=:<.0.5*(i.9 9)+i.9 9
FRONT=:S=:81 3$,><"1 (|.YELLOW)+"1/|.MAGENTA FRONT viewmat A
RIGHT=:S=:81 3$,><"1 (|.CYAN)+"1/|.MAGENTA RIGHT viewmat A

Linda

-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Linda Alvord
Sent: Sunday, June 14, 2015 2:38 AM
To: [email protected]
Subject: Re: [Jprogramming] Trouble making patter for a color cube

Here's an idea I'm using to blend two colors. In this new problem, I want to
take advantage of the fact that a list of graded shades of blue and a list
of shades of red form a table that produces magenta. 

You are using three colors to make each face.

It is interesting that shades of cyan and shades of magenta wwill produce
red.

Can you incorporate that in your design?

Here's how I demonstrated it.

In this new color cube I am trying to stay with the same idea.

As you can see, I ran into trouble with YELLOW. 

load 'viewmat'

VISIBLE_jviewmat_=:GUI_jviewmat_=:0
RGB=:0 255{~#:i.8
GRB=:1 0 2{"1 RGB
RGB;GRB
GRB viewmat (-.0=*/~i:4);'PLUS'
GRB viewmat (8 8$i.8);'TOP'
GRB viewmat (|:8 8$i.8);'SIDE'
A=:<.0.5*(i.8 8)+|:i.8 8
B=:(i.8)<:/i.8
C=:63*(i.8)>/i.8
GRB viewmat (C+B*A);'BLEND'
VISIBLE_jviewmat_=:GUI_jviewmat_=:1

coclass 'qtdemo'
blendcolor_run=: 3 : 0
wd 'pc imdemo closeok escclose'
wd 'grid size 2 2'
wd 'cc pic image'
wd 'cc png1 image'
wd 'cc png2 image'
wd 'cc png3 image'
wd 'set pic image *' ,jpath '~temp/PLUS.png'
wd 'set png1 image *', jpath '~temp/TOP.png'
wd 'set png2 image *', jpath '~temp/SIDE.png'
wd 'set png3 image *', jpath '~temp/BLEND.png'
wd 'pshow'
)

blendcolor_close=: 3 : 0
wd 'pclose'
)

blendcolor_run''

Linda

-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Linda Alvord
Sent: Sunday, June 14, 2015 2:02 AM
To: [email protected]
Subject: Re: [Jprogramming] Trouble making patter for a color cube

This time I get an error after a large image of color stripes from red to
blue.

cube''
|value error: BLACK
|       colors viewmat i.20 15
    
I'm not sure how to fix it. 

Linda


-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Raul Miller
Sent: Saturday, June 13, 2015 10:00 AM
To: Programming forum
Subject: Re: [Jprogramming] Trouble making patter for a color cube

Ok, fair enough.

New plan:

TOP=:<,.'TOP';<2 2$;:'BLACK BLUE RED MAGENTA'
BACK=:<,.'BACK';<2 2$;:'GREEN CYAN BLACK BLUE'
FRONT=:<,.'FRONT';<2 2$;:'RED MAGENTA YELLOW WHITE'
BASE=:<,.'BASE';<2 2$;:'YELLOW WHITE GREEN CYAN'
LEFT=:<,.'LEFT';<2 2$;:'GREEN BLACK RED YELLOW'
RIGHT=:<,.'RIGHT';<2 2$;:'BLUE CYAN MAGENTA WHITE'
   BASE(<3 1)}FRONT(<2 1)}(LEFT,TOP,RIGHT)1}BACK(<0 1)}4 3$a:

Implementation:

'BLANK'=: <BLACK;BLACK;BLACK
'BACK'=:  <GREEN;CYAN;BLACK
'LEFT'=:  <GREEN;BLACK;YELLOW
'TOP'=:   <BLACK;BLUE;RED
'RIGHT'=: <BLUE;CYAN;MAGENTA
'FRONT'=: <RED;MAGENTA;YELLOW
'BASE'=:  <YELLOW;WHITE;GREEN

squarecolor=:3 :0
  'O X Y'=. y
  colors=. <.255*O+"1]0.25*((i.5)*/Y-"1 O)+"1/(i.5)*/X-"1 O
)

cube=:3 :0
  plan=: BASE(<3 1)}FRONT(<2 1)}(LEFT,TOP,RIGHT)1}BACK(<0 1)}4 3$BLANK
  ref=.  ((75*i.4)+/5*i.3) +each <i.5 5
  colors=.  ,/,/>,"_1 each/"1 squarecolor each plan
  colors viewmat i.20 15
)

cube''

Technically, I didn't need to quote my color names, but I decided to leave
the quotes in as emphasis (or, perhaps more accurately, to give some style
to those particular names).

Thanks,

--
Raul


On Sat, Jun 13, 2015 at 5:11 AM, Linda Alvord <[email protected]>
wrote:
> Raul, I can see that a plan is useful. If you think of Black as no light.
> Now build three axes. Blue is to the right (0 to 255). Red is forward
toward
> you. And green moves up from the base. So
>
> I like your floor plan, Now LEFT and RIGHT are not oriented correctly.
>
> Try your code in JHS. There you can just place the images where you 
> want them.
>
> Linda
>
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]] On Behalf Of Linda
Alvord
> Sent: Saturday, June 13, 2015 4:40 AM
> To: [email protected]
> Subject: Re: [Jprogramming] Trouble making patter for a color cube
>
> Also, when I ran your code in jqt, I separated the  separate images 
> and
they
> work together.  However they are a horizontal flip of your layout for 
> the pieces.  Linda
>
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]] On Behalf Of Linda
Alvord
> Sent: Saturday, June 13, 2015 4:25 AM
> To: [email protected]
> Subject: Re: [Jprogramming] Trouble making patter for a color cube
>
> Raul, I got an error after you layout appeared.  Now that I removed 
> that line, I got your six images. They are correct Now put them into 
> your
layout
> pattern so that the correct colors are joined. And make one big image 
> with the correct sides joined.
>
> It still bothers me that two of the faces in my work aren't correct.  
> Now
on
> to study your strategy.  Linda
>
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]] On Behalf Of Linda
Alvord
> Sent: Saturday, June 13, 2015 3:21 AM
> To: [email protected]
> Subject: Re: [Jprogramming] Trouble making patter for a color cube
>
> This a "Color Cube. It should print in color. And then you cut it out 
> and fold it up and you have a little cube with pretty colors that will 
> show
you
> lots of things about how light makescolors. Myc cube will only have
> 125 colors, but it becomes infinite in your imagination.
>
> However, I will give some thought to what you sent. This is why the 
> forum
is
> such fun. Each person tackles a problem in a different way.
>
> Linda
>
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]] On Behalf Of Raul 
> Miller
> Sent: Saturday, June 13, 2015 1:00 AM
> To: Programming forum
> Subject: Re: [Jprogramming] Trouble making patter for a color cube
>
> I got a lot of squares running your script, and the one that I really
liked
> was the one that was labeled 'TOP'. So I'll base my implementation on 
> that one.
>
> For something as complicated as this, I think I'd like to sketch out 
> first how it's supposed to look.
>
> So here's my first sketch:
> (<'BASE')(<3 1)}(<'FRONT')(<2 1)}(;:'LEFT TOP RIGHT')1}(<'BACK')(<0
> 1)}4
> 3$a:
>
> (beware line wrap - that's supposed to be a single line).
>
> But I also need to think about colors. After a little fiddling, I 
> decided
to
> go with this:
>
> TOP=:<,.'TOP';<2 2$;:'BLACK BLUE RED MAGENTA'
> BACK=:<,.'BACK';<2 2$;:'GREEN CYAN BLACK BLUE'
> FRONT=:<,.'FRONT';<2 2$;:'RED MAGENTA YELLOW WHITE'
> BASE=:<,.'BASE';<2 2$;:'YELLOW WHITE GREEN CYAN'
> LEFT=:<,.'LEFT';<2 2$;:'BLACK RED GREEN YELLOW'
> RIGHT=:<,.'RIGHT';<2 2$;:'MAGENTA BLUE WHITE CYAN'
>    BASE(<3 1)}FRONT(<2 1)}(LEFT,TOP,RIGHT)1}BACK(<0 1)}4 3$a:
>
> with that out of the way, all I need is a routine to render squares, 
> the rest of the code almost writes itself:
>
> 'BLACK BLUE GREEN CYAN RED MAGENTA YELLOW WHITE'=:#:i.8
>
> square=:4 :0
>   'O X Y'=. y
>   colors=. <.255*O+"1,/0.25*((i.5)*/Y-"1 O)+"1/(i.5)*/X-"1 O
>   colors viewmat (i.5 5);x
> )
>
> 'BACK' square GREEN;CYAN;BLACK
> 'LEFT' square BLACK;RED;GREEN
> 'TOP' square BLACK;BLUE;RED
> 'RIGHT' square MAGENTA;BLUE;WHITE
> 'FRONT' square RED;MAGENTA;YELLOW
> 'BASE' square YELLOW;WHITE;GREEN
>
> Good enough?
>
> Thanks,
>
> --
> Raul
>
>
> On Sat, Jun 13, 2015 at 12:04 AM, Linda Alvord 
> <[email protected]>
> wrote:
>> I am planning to begin a review of J Tech Grade 3 before introducing 
>> some new topics in Grade 4. I am making a pattern which could be 
>> printed and
> then
>> folded to form a color cube. It requires three dimensions for the 
>> three colors of light, Green, Red and  Blue.  I have the colors 
>> following the order of counting to 8 in base 2. The columns in the 
>> binary array
> represent
>> Green, Red and then Blue. This insures that the falues are in order 
>> from dark to light.
>>
>>
>>
>> The pattern must have six sides. All went well with the first 4 
>> sides, However the final two sides don't cooperate. I suspect there 
>> is some
> little
>> problem in viewmat. Here is my progress so far. The front and the 
>> bottom
> are
>> the problems. They both involve YELLOW.
>>
>>
>>
>> As is usual I welcome ways you may know to improve what I am trying 
>> to
do.
> I
>> suggest using JHS to see how this is progressing.
>>
>>
>>
>> load 'viewmat'
>>
>> N=:<.63.8*i.5
>>
>> BLACK=:9 3$0
>>
>> BLUE=:(2#"1,.(4#0),N),.N,4#255
>>
>> RED=:(N,4#255),.2#"1,.(4#0),N
>>
>> MAGENTA=:(N,4#255),.((4#0),N),.N,4#255
>>
>> GREEN=:((4#0),N),.(N,4#255),.(4#0),N
>>
>> CYAN=:((4#0),N),.2#"1 ,.N,4#255
>>
>> YELLOW=:(2#"1 ,.N,4#255) ,.(4#0),N
>>
>> WHITE=:9 3$255
>>
>> (#:i.8);'BLACK','BLUE','RED','MAGENTA','GREEN','CYAN','YELLOW',:'WHITE'
>>
>>
>>
>> A=:<.0.5*(i.5 5)+i.5 5
>>
>>
>>
>> BLANK=:25 3$255
>>
>> BACK=:25 3$,><"1 (0 1 2 3 4{GREEN)+"1/(0 1 2 3 4){BLUE
>>
>> BACK viewmat A
>>
>> (BACK,BLANK)viewmat (25+A),.|.A
>>
>>
>>
>> TOP=:25 3$,><"1 (0 1 2 3 4{RED)+"1/(0 1 2 3 4){BLUE
>>
>> TOP viewmat A;'TOP'
>>
>> LEFT=:25 3$,><"1 (0 1 2 3 4{GREEN)+"1/(0 1 2 3 4){RED
>>
>> LEFT viewmat A
>>
>> (TOP,LEFT) viewmat (25+|:|.A),.A
>>
>>
>>
>> ((TOP,LEFT) viewmat (25+|:|.A),.A),.(BACK,BLANK)viewmat (25+A),.|.A
>>
>>
>>
>> RIGHT=:R=:25 3$,><"1 P=:(8 7 6 5 4{CYAN)+"1/(8 7 6 5 4){MAGENTA
>>
>> RIGHT viewmat A
>>
>>
>>
>> FRONT=:S=:25 3$,><"1 Q=:(8 7 6 5 4{YELLOW)+"1/(8 7 6 5 4){MAGENTA
>>
>> FRONT viewmat A
>>
>>
>>
>> BOTTOM=:25 3$,><"1 (8 7 6 5 4{CYAN)+"1/(8 7 6 5 4){YELLOW
>>
>> BOTTOM viewmat A
>>
>>
>>
>> R;S
>>
>>
>>
>> I included R;S to show how close the good and the bad faces are prior 
>> to using viewmat.
>>
>>
>>
>> Linda
>>
>>
>>
>> ---------------------------------------------------------------------
>> - For information about J forums see 
>> http://www.jsoftware.com/forums.htm
> ----------------------------------------------------------------------
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>
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>
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>
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>
> ----------------------------------------------------------------------
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