Here's how I found big numbers. They were necessary when I wanted to mix colors prighter than full green blue or red. Make Light Magenta and Light Cyan (LMAGENTA and LCYAN)
MIX is a palette of 25 colors. (all light) and works well to create blue. However it did not extend to a mix of cyan and yellow which chould combine to red. Also, cyan and yellow should form green. I finally found a fix to make the pattern look ok. I suspect there is some upper limit for numbers in viewmat which could be raised just enough to allow me to create red and green. That’s how I got to 510. Linda -----Original Message----- From: programming-boun...@forums.jsoftware.com [mailto:programming-boun...@forums.jsoftware.com] On Behalf Of Raul Miller Sent: Monday, June 29, 2015 11:17 PM To: Programming forum Subject: Re: [Jprogramming] Trouble making patter for a color cube Why do you use the numeric value 510? Thanks, -- Raul On Mon, Jun 29, 2015 at 10:17 PM, Linda Alvord <lindaalv...@verizon.net> wrote: > Here is my final pattern for a color cube. I finally corrected all the > problems. I moved the faces to make it more obvious that the black corner > is diagonally opposite from the white corner. Also the black tabs can be > bent to allow the cube to be glued together. It will be the final project > for JTECH Grade 4. First, grade 4 is all about decimals, fractions and > percent. Here's the code: > > load 'viewmat' > N=:<.63.75*i.5 > W=:5 5$150 > R=:5 5$(4#150),0 > L=:|:|.|:R > f=:(0=#:i.8)+2*#:i.8 > g=:((4#0),N),.N,4#255 > h=:,#:i.8 > BIGBOX=:<"2 |:"2 >"0(<"2) 8 3 9$,|:h{"1 g > 'BLACK BLUE RED MAGENTA GREEN CYAN YELLOW WHITE'=:>BIGBOX > WHITE=:5 5$150 > LMAGENTA=:8 7 6 5 4{"2 MAGENTA > LCYAN=:8 7 6 5 4{"2 CYAN > LYELLOW=:8 7 6 5 4{"2 YELLOW > A=:i.5 5 > BACK=:25 3$,><"1 (0 1 2 3 4{GREEN)+"1/(0 1 2 3 4){BLUE > LEFT=:25 3$,(0 1 2 3 4{GREEN)+"1/(0 1 2 3 4){RED > TOP=:25 3$,(0 1 2 3 4{RED)+"1/(0 1 2 3 4){BLUE > FRONT=:(25 3$,LYELLOW +"1/LMAGENTA)-255 > RIGHT=:25 3$,LCYAN +"1/LMAGENTA > BASE=:(25 3$,LYELLOW+"1/LCYAN)-255 > WOW1=:(R,.(|.A),.L),((|:|.25+A),.(50+A),.W) > WOW2=:WOW1,((|.R),.(|.|:|.75+A),.|.|:100+A) > WOW3=:WOW2,(W,.(|:|.125+A),.L),"2,5(#"0) 150 0 150 > ALL=:BACK,LEFT,TOP,FRONT,RIGHT,BASE(,"2) 510 510 510 > ALL viewmat WOW3 > > Linda > > > > -----Original Message----- > From: programming-boun...@forums.jsoftware.com > [mailto:programming-boun...@forums.jsoftware.com] On Behalf Of Mike Day > Sent: Sunday, June 28, 2015 7:26 AM > To: programm...@jsoftware.com > Subject: Re: [Jprogramming] Trouble making patter for a color cube > > Thanks again. > > Yes, I wondered why you were taking sextuples with > 0 1 2 2 1 3 { coords . > > So are you or some other genius in interfacing data, displays and o/s > developing some neat cover-functions? > I can't imagine I'd ever discover how to do what looks like pretty low-level > coding and high-level awareness of all the tools available. > > Brilliant stuff, Bill > > Mike > > On 28/06/2015 11:58, bill lam wrote: >> the vertexData code was originally adapted from some C program. >> >> ColorData can be calculated for arbitrary colors by some pseudo code >> such as >> >> (ABCDEFGH i. vertexData) { (8 colors for AB...GH) >> >> Codes are much longer than that in J602 partly because users now are >> responsible of feeding data into pipeline. >> >> Also the shader demo is intended to also run on android, so that each >> face (square) is represented as 2 triangles. >> >> Вс, 28 июн 2015, Mike Day написал(а): >>> Marvellous! >>> >>> I went back to J803 to compare, but the shader doesn't seem to work >>> there. However, the opengl/basic/colors demo in J602 is very similar, >>> requiring, apparently, very little code. >>> >>> What a lot of code for the J804 version, but I suppose it's doing a >>> lot more than we mere mortals with viewmat - which in its turn >>> appears to do a whole lot more than what I'd realised hitherto... >>> >>> I don't see why the definition of vertexData needs be quite so >>> long-winded. I'd define (perhaps) 'G H F E' =: - 'A B C D' =: _1 1 >>> _1, 1 1 _1, 1 _1 _1,: _1 _1 _1 (not sure about the back-side - this >>> labelling "sees" >>> a face EFGH behind the face ABCD) >>> and then define the 6 faces in terms of these labels. >>> >>> Raul points out that the colours in the all-8-colours cube are >>> essentially the same as their vertices, so you could just define >>> >>> colorData =: 1 fc _1 1 i. _1 fc vertexData >>> >>> However, this assumes a fixed choice of colour for each vertex. >>> As it is, I don't see how one can easily modify the corner colours >>> to a user's arbitrary selection; this would be more manageable if >>> colorData were defined in terms of the 8 (arbitrary) colours >>> for A B .. G H. fc appears to support reals, so such colours >>> may be defined in [0.0, 1.0] if the user wishes. >>> >>> Thanks, >>> >>> Mike >>> >>> On 28/06/2015 02:52, bill lam wrote: >>>> I made an attemp to implement color scheme proposed by Raul and Mike >>>> in the opengl shader demo of j804 beta. Please update qt addon to >>>> check if the result agrees with viewmat, and fix shader if >>>> necessary. F10 is used to start/stop timer. >>>> >>> >>> --- >>> This email has been checked for viruses by Avast antivirus software. >>> https://www.avast.com/antivirus >>> >>> --------------------------------------------------------------------- >>> - For information about J forums see >>> http://www.jsoftware.com/forums.htm > > > --- > This email has been checked for viruses by Avast antivirus software. > https://www.avast.com/antivirus > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
