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Completely re-made main patcher, tweaked js a bit (list output mode, few optimizations), added example patch 

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TFLCL 4 years ago
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  1. 131
      Cubehelix.js
  2. 3249
      Cubehelix.maxpat
  3. 468
      Cubehelix_example.maxpat

131
Cubehelix.js
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// Cubehelix color scheme for Max/MSP/Jitter
// By Théophile Clet - https://tflcl.xyz
// Based on Dave Green's work: http://www.mrao.cam.ac.uk/~dag/CUBEHELIX/cubetry.html
// Original publication: Green, D. A., 2011, `A colour scheme for the display of astronomical intensity images', Bulletin of the Astronomical Society of India, 39, 289. (2011BASI...39..289G at ADS.) ( http://astron-soc.in/bulletin/11June/289392011.pdf )
// Original js code taken straight from the online example implementation: http://www.mrao.cam.ac.uk/~dag/CUBEHELIX/cubetry.html
autowatch = 0;
// By Théophile Clet
// https://tflcl.xyz
//
// Based on Dave Green's work:
// http://www.mrao.cam.ac.uk/~dag/CUBEHELIX/cubetry.html
//
// Original publication: Green, D. A., 2011, `A colour scheme for the display of astronomical intensity images', Bulletin of the Astronomical Society of India, 39, 289. (2011BASI...39..289G at ADS.)
// http://astron-soc.in/bulletin/11June/289392011.pdf )
//
// Original js code taken straight from the online example implementation:
// http://www.mrao.cam.ac.uk/~dag/CUBEHELIX/cubetry.html
autowatch = 1;
inlets = 1;
outlets = 2;
outlets = 4;
var RGBOUTLET = 0;
var HSLOUTLET = 1;
var LISTOUTLET = 2
var DUMPOUTLET = 3;
setinletassist(0, "List as input: {makeCubehelixRGB, start[float], rots[float], sign[-1,1], hue[float], gamma[float], levels(int), flip([0,1]}")
setoutletassist(0, "To jit.matrix: outputs the color palette as a 4-plane 1 dim matrix");
setoutletassist(1, "dump out. Outputs paramters used for generation. Bangs when finished.");
setoutletassist(0, "To jit.matrix: always outputs the color palette as a ARGB 4-plane matrix");
setoutletassist(1, "To jit.matrix: if 'hslenable 1' outputs the color palette as a AHSL 4-plane matrix");
setoutletassist(2, "If 'listmode 1' outputs all colors in list format as RGB or HSL.");
setoutletassist(3, "Bangs when generation is done.");
function makeCubehelixRGB(start, rots, sign, hue, gamma, levels, flip){
rots = rots*sign;
var hslmode = false;
var listmode = false;
function hslenable(s){
hslmode = s;
}
function listenable(s){
listmode = s;
}
function makeCubehelix(start, rots, hue, gamma, levels, flip){
//dumpOut(start, rots, hue, gamma, levels, flip);
outlet(RGBOUTLET, "dim", levels, 1);
if (hslmode) {
outlet(HSLOUTLET, "dim", levels, 1);
}
outlet(0, "dim", levels, 1);
for (var i = 0; i < levels; i++) {
var fract = CubeHelixFract(i,levels,flip);
var red = CubeHelixRGB(fract,start,rots,hue,gamma,1);
var grn = CubeHelixRGB(fract,start,rots,hue,gamma,2);
var blu = CubeHelixRGB(fract,start,rots,hue,gamma,3);
var color = CubeHelixRGB(fract,start,rots,hue,gamma);
if(flip == 1){fract = 1.0-fract;}
outlet(0, "setcell", i, 0, "val", 1., red, grn, blu);
outlet(RGBOUTLET, "setcell", i, 0, "val", 1., color);
if (hslmode) {
color = rgb2hsl(color[0], color[1], color[2]);
outlet(HSLOUTLET, "setcell", i, 0, "val", 1., color);
}
if (listmode) { outlet(LISTOUTLET, i, color); }
}
outlet(0, "bang");
outlet(1, "bang");
outlet(RGBOUTLET, "bang");
if (hslmode) { outlet(HSLOUTLET, "bang"); }
if (listmode) { outlet(LISTOUTLET, "bang"); }
outlet(DUMPOUTLET, "bang");
}
function dumpOut(start, rots, hue, gamma, levels, flip){
outlet(1, "start", start);
outlet(1, "rots", rots);
outlet(1, "hue", hue);
outlet(1, "gamma", gamma);
outlet(1, "levels", levels);
outlet(1, "flip", flip);
outlet(DUMPOUTLET, "start", start);
outlet(DUMPOUTLET, "rots", rots);
outlet(DUMPOUTLET, "hue", hue);
outlet(DUMPOUTLET, "gamma", gamma);
outlet(DUMPOUTLET, "levels", levels);
outlet(DUMPOUTLET, "flip", flip);
}
function rgb2hsl(r,g,b) {
var max = Math.max(r, g, b), min = Math.min(r, g, b);
var h, s, l = (max + min) / 2;
if (max == min) {
h = s = 0; // achromatic
} else {
var d = max - min;
s = l > 0.5 ? d / (2 - max - min) : d / (max + min);
switch (max) {
case r: h = (g - b) / d + (g < b ? 6 : 0); break;
case g: h = (b - r) / d + 2; break;
case b: h = (r - g) / d + 4; break;
}
h /= 6;
}
return [ h, s, l ];
}
// ----------------------------------------------------------------------------
// 2017 May 30: make consistent with Fortran
// 2021 mai 12: a bit of calculation optimization (I think) - Théophile Clet
// ----------------------------------------------------------------------------
function CubeHelixRGB(fract,start,rots,hue,gamma,irgb){
function CubeHelixRGB(fract,start,rots,hue,gamma){
var angle = 2*Math.PI*(start/3.0+1+rots*fract);
var fract = Math.pow(fract, gamma);
var amp=hue*fract*(1-fract)/2.0;
var r=fract+amp*(-0.14861*Math.cos(angle)+1.78277*Math.sin(angle));
var g=fract+amp*(-0.29227*Math.cos(angle)-0.90649*Math.sin(angle));
var b=fract+amp*(+1.97294*Math.cos(angle));
r=Math.max(Math.min(r,1.0),0.0);
var g=fract+amp*(-0.29227*Math.cos(angle)-0.90649*Math.sin(angle));
g=Math.max(Math.min(g,1.0),0.0);
var b=fract+amp*(+1.97294*Math.cos(angle));
b=Math.max(Math.min(b,1.0),0.0);
if(irgb == 1){
return r;
}
else if(irgb == 2) {
return g;
}
else {
return b;
}
return [r, g, b];
}
// ----------------------------------------------------------------------------

3249
Cubehelix.maxpat
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468
Cubehelix_example.maxpat
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