If you look at this in JHS you can see the problem doesn't seem to be the numbers being out of range. Magenta and cyan light should be blue which it is.
However, magenta and yellow should be red so the lowest right corner should be the brightest red. Cyan and yellow should be green and the lowest right corner is not the brightest green. So I would guess that yellow has a problem. Linda -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Brian Schott Sent: Monday, June 15, 2015 11:21 AM To: Programming forum Subject: Re: [Jprogramming] Trouble making patter for a color cube Linda, I think Bill might have been offering the clue that numbers bigger than 255 are not good or unpredictable for viewmat, or maybe not good for RGB. On Mon, Jun 15, 2015 at 2:55 AM, Linda Alvord <[email protected]> wrote: > If you name the two images S and T: > > 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 > S=:81 3$,><"1 (|.YELLOW)+"1/|.MAGENTA > S viewmat A;'S' > T=:81 3$,><"1 (|.CYAN)+"1/|.MAGENTA > T viewmat A;'T' > > S;T > > Each image is 9x9 array of colors. Look at thtop and left 5x5 corner > of T. You find a perfect face of the color cue which grades both cyan > and magenta correctly to form BLUE. > > In S, this does not happen! All goes well in 4X5 rows but the 5th row > does not provide the yellow correctly. It should end in RED. > > Any clues why not? > > Linda > > -- (B=) ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
