prosperon/scripts/color.js

var Color = {
  white: [255,255,255],
  black: [0,0,0],
  blue: [0,0,255],
  green: [0,255,0],
  yellow: [255,255,0],
  red: [255,0,0],
  gray: [181,181,181],
  cyan: [0,255,255],
  purple: [162,93,227],
  orange: [255,144,64],
  magenta: [255,0,255],
};

Color.editor = {};
Color.editor.ur = Color.green;

Color.tohtml = function(v)
{
  var html = v.map(function(n) { return Number.hex(n*255); });
  return "#" + html.join('');
}

var esc = {};
esc.reset = "\x1b[0";
esc.color = function(v) {
  var c = v.map(function(n) { return Math.floor(n*255); });
  var truecolor = "\x1b[38;2;" + c.join(';') + ';';
  return truecolor;
}

esc.doc = "Functions and constants for ANSI escape sequences.";

Color.Arkanoid = {
  orange: [255,143,0],
  teal: [0,255,255],
  green: [0,255,0],
  red: [255,0,0],
  blue: [0,112,255],
  purple: [255,0,255],
  yellow: [255,255,0],
  silver: [157,157,157],
  gold: [188,174,0],
};

Color.Arkanoid.Powerups = {
  red: [174,0,0], /* laser */
  blue: [0,0,174], /* enlarge */
  green: [0,174,0], /* catch */
  orange: [224,143,0], /* slow */
  purple: [210,0,210], /* break */
  cyan: [0,174,255], /* disruption */
  gray: [143,143,143] /* 1up */
};

Color.Gameboy = {
  darkest: [229,107,26],
  dark: [229,189,26],
  light: [189,229,26],
  lightest: [107,229,26],
};

Color.Apple = {
  green: [94,189,62],
  yellow: [255,185,0],
  orange: [247,130,0],
  red: [226,56,56],
  purple: [151,57,153],
  blue: [0,156,223]
};

Color.Debug = {
  boundingbox: Color.white,
  names: [84,110,255],
};

Color.Editor = {
  grid: [99,255,128],
  select: [255,255,55],
  newgroup: [120,255,10],
};

/* Detects the format of all colors and munges them into a floating point format */
Color.normalize = function(c) {
  var add_a = function(a) {
    var n = this.slice();
    n.a = a;
    return n;
  };
  
  for (var p of Object.keys(c)) {
    var fmt = "nrm";
    if (typeof c[p] !== 'object') continue;
    if (!Array.isArray(c[p])) {
      Color.normalize(c[p]);
      continue;
    }
    
    c[p][3] = 255;
    
    for (var color of c[p]) {
      if (color > 1) {
        fmt = "8b";
	      break;
      }
    }

    switch(fmt) {
      case "8b":
        c[p] = c[p].map(function(x) { return x/255; });
    }
    c[p].alpha = add_a;
  }
};

Color.normalize(Color);

Object.deepfreeze(Color);

var ColorMap = {};
ColorMap.makemap = function(map)
{
  var newmap = Object.create(ColorMap);
  Object.assign(newmap, map);
  return newmap;
}
ColorMap.Jet = ColorMap.makemap({
  0: [0,0,131],
  0.125: [0,60,170],
  0.375: [5,255,255],
  0.625: [255,255,0],
  0.875: [250,0,0],
  1: [128,0,0]
});

ColorMap.BlueRed = ColorMap.makemap({
  0: [0,0,255],
  1: [255,0,0]
});

ColorMap.Inferno = ColorMap.makemap({
  0:[0,0,4],
  0.13: [31,12,72],
  0.25: [85,15,109],
  0.38: [136,34,106],
  0.5: [186,54,85],
  0.63: [227,89,51],
  0.75: [249,140,10],
  0.88: [249,201,50],
  1: [252,255,164]
});

ColorMap.Bathymetry = ColorMap.makemap({
  0: [40,26,44],
  0.13: [59.49,90],
  0.25: [64,76,139],
  0.38: [63,110,151],
  0.5: [72,142,158],
  0.63: [85,174,163],
  0.75: [120,206,163],
  0.88: [187,230,172],
  1: [253,254,204]
});

ColorMap.Viridis = ColorMap.makemap({
  0: [68,1,84],
  0.13: [71,44,122],
  0.25: [59,81,139],
  0.38: [44,113,142],
  0.5: [33,144,141],
  0.63: [39,173,129],
  0.75: [92,200,99],
  0.88: [170,220,50],
  1: [253,231,37]
});

Color.normalize(ColorMap);

ColorMap.sample = function(t, map = this)
{
  if (t < 0) return map[0];
  if (t > 1) return map[1];

  var lastkey = 0;
  for (var key of Object.keys(map).sort()) {
    if (t < key) {
      var b = map[key];
      var a = map[lastkey];
      var tt = (key - lastkey) * t;
      return a.lerp(b, tt);
    }
    lastkey = key;
  }
  return map[1];
}

ColorMap.doc = {
  sample: "Sample a given colormap at the given percentage (0 to 1).",
};

Object.freeze(ColorMap);

return {
  Color,
  esc,
  ColorMap
}