​

function ColorMatrix(o,m) { // takes: RGBA object, Matrix array

​

    function fu(n) { 

      let value = 0;

      if( n < 0 ){

        value = 0;

      }else if( n < 255 ){

        value = n;

      }else{

        value = 255;

      }

      return value; 

    }

​

    var r=((o.R*m[0])+(o.G*m[1])+(o.B*m[2])+(o.A*m[3])+m[4]);

    var g=((o.R*m[5])+(o.G*m[6])+(o.B*m[7])+(o.A*m[8])+m[9]);

    var b=((o.R*m[10])+(o.G*m[11])+(o.B*m[12])+(o.A*m[13])+m[14]);

    var a=((o.R*m[15])+(o.G*m[16])+(o.B*m[17])+(o.A*m[18])+m[19]);

    return({'R':fu(r), 'G':fu(g), 'B':fu(b), 'A':fu(a)});

};

​

function Blind(v) { // this function just returns the Matrix

​

    return({

      'Normal':[1,0,0,0,0, 0,1,0,0,0, 0,0,1,0,0, 0,0,0,1,0, 0,0,0,0,1],     

      'Protanopia':[0.567,0.433,0,0,0, 0.558,0.442,0,0,0, 0,0.242,0.758,0,0, 0,0,0,1,0, 0,0,0,0,1],

      'Protanomaly':[0.817,0.183,0,0,0, 0.333,0.667,0,0,0, 0,0.125,0.875,0,0, 0,0,0,1,0, 0,0,0,0,1],

      'Deuteranopia':[0.625,0.375,0,0,0, 0.7,0.3,0,0,0, 0,0.3,0.7,0,0, 0,0,0,1,0, 0,0,0,0,1],

      'Deuteranomaly':[0.8,0.2,0,0,0, 0.258,0.742,0,0,0, 0,0.142,0.858,0,0, 0,0,0,1,0, 0,0,0,0,1],

      'Tritanopia':[0.95,0.05,0,0,0, 0,0.433,0.567,0,0, 0,0.475,0.525,0,0, 0,0,0,1,0, 0,0,0,0,1],

      'Tritanomaly':[0.967,0.033,0,0,0, 0,0.733,0.267,0,0, 0,0.183,0.817,0,0, 0,0,0,1,0, 0,0,0,0,1],

      'Achromatopsia':[0.299,0.587,0.114,0,0, 0.299,0.587,0.114,0,0, 0.299,0.587,0.114,0,0, 0,0,0,1,0, 0,0,0,0,1],

      'Achromatomaly':[0.618,0.320,0.062,0,0, 0.163,0.775,0.062,0,0, 0.163,0.320,0.516,0,0,0,0,0,1,0,0,0,0,0]

    }[v]);

​

};

​

/* Here we are calling the function */

​

​

function setup() {

  createCanvas(400, 400);

  noLoop();

  draw();

}

​

function draw() {

  background(220);

  // needs four colors

  let newColor = ColorMatrix( {R:255, G:0, B:0, A:255}, Blind('Deuteranomaly') );

  console.log(newColor)

  fill(newColor.R,newColor.G,newColor.B)

  rect(0,0,100,100);

}