characterglitch/charsort.html at main · willbearfruits/characterglitch · GitHub

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<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width,initial-scale=1,viewport-fit=cover">
<style>
*{margin:0;padding:0}
body{background:#0a0a0c;overflow:hidden;touch-action:none;cursor:none}
canvas{display:block}
</style>
</head>
<body>
<canvas id="c"></canvas>
<script>
const cv=document.getElementById('c');
const ctx=cv.getContext('2d');

const CELL=14;
let W,H,cols,rows;
let mx=0.5,my=0.5,pmx=0.5,pmy=0.5;
let t=0;
let field; // brightness field
let sorted; // sorted output

// combining marks
const ABOVE=['\u0300','\u0301','\u0302','\u0303','\u0307','\u0308','\u030A','\u030B','\u030C','\u0311'];
const BELOW=['\u0323','\u0324','\u0325','\u0330','\u0331','\u0332','\u0347'];
const STRIKE=['\u0334','\u0335','\u0336'];

// characters by brightness
const RAMP=' \u00B7\u2027\u2219\u2022-~:;\u2591=+\u2592x*\u2593#%\u2588@\u25A0\u25CF'.split('');

function resize(){
  W=window.innerWidth;H=window.innerHeight;
  cv.width=W;cv.height=H;
  cols=Math.floor(W/(CELL*0.55));
  rows=Math.floor(H/CELL);
  field=new Array(rows);
  sorted=new Array(rows);
  for(let r=0;r<rows;r++){
    field[r]=new Float32Array(cols);
    sorted[r]=new Array(cols);
  }
  ctx.textBaseline='top';
}

// simplex-ish noise layers
function fbm(x,y,oct){
  let v=0,amp=1,freq=1,total=0;
  for(let i=0;i<oct;i++){
    v+=amp*(Math.sin(x*freq*2.17+t*0.7+i*31.7)*Math.cos(y*freq*1.93+t*0.5+i*17.3)
      +Math.sin((x+y)*freq*1.47+t*0.9+i*7.1)*0.5);
    total+=amp;
    amp*=0.5;
    freq*=2.1;
  }
  return v/total;
}

// generate procedural field with features
function generateField(){
  const time=t;
  // slowly moving shapes
  const cx1=0.3+Math.sin(time*0.3)*0.2;
  const cy1=0.4+Math.cos(time*0.25)*0.2;
  const cx2=0.7+Math.cos(time*0.35)*0.15;
  const cy2=0.6+Math.sin(time*0.2)*0.2;
  const cx3=0.5+Math.sin(time*0.4)*0.25;
  const cy3=0.3+Math.cos(time*0.3)*0.25;

  for(let r=0;r<rows;r++){
    for(let c=0;c<cols;c++){
      const fx=c/cols,fy=r/rows;

      // noise base
      let v=fbm(fx*3,fy*3,4)*0.5+0.5;

      // radial shapes that move
      const d1=Math.sqrt((fx-cx1)**2+(fy-cy1)**2);
      const d2=Math.sqrt((fx-cx2)**2+(fy-cy2)**2);
      const d3=Math.sqrt((fx-cx3)**2+(fy-cy3)**2);

      v+=Math.max(0,0.3-d1)*2;
      v+=Math.max(0,0.25-d2)*1.8;
      v+=Math.max(0,0.2-d3)*2.2;

      // diagonal bands
      v+=Math.sin((fx*4+fy*3+time*0.4)*6)*0.08;

      // mouse proximity adds brightness
      const dm=Math.sqrt((fx-pmx)**2+(fy-pmy)**2);
      v+=Math.max(0,0.12-dm)*4;

      field[r][c]=Math.max(0,Math.min(1,v));
    }
  }
}

// THE SORT - this is the core pixel sort algorithm adapted for characters
function sortField(){
  // threshold controlled by mouse Y
  const loThresh=Math.max(0.05,pmy*0.5-0.1);
  const hiThresh=Math.min(0.98,pmy*0.5+0.4);

  // sort direction influenced by mouse X: 0=horizontal, 1=vertical, blend
  const hWeight=1-Math.abs(pmx-0.5)*2; // center=vertical, edges=horizontal

  // horizontal sort
  for(let r=0;r<rows;r++){
    // find spans to sort: contiguous runs where brightness is within threshold
    let spans=[];
    let spanStart=-1;

    for(let c=0;c<cols;c++){
      const v=field[r][c];
      const inRange=v>loThresh&&v<hiThresh;

      if(inRange&&spanStart===-1){
        spanStart=c;
      }else if(!inRange&&spanStart!==-1){
        spans.push([spanStart,c-1]);
        spanStart=-1;
      }
    }
    if(spanStart!==-1)spans.push([spanStart,cols-1]);

    // copy original values
    const rowCopy=new Float32Array(field[r]);

    // sort each span by brightness
    for(const[start,end]of spans){
      if(end-start<2)continue;
      const slice=[];
      for(let c=start;c<=end;c++){
        slice.push({val:rowCopy[c],origCol:c});
      }
      // sort ascending (dark to light) or descending based on position
      const descending=r%2===0;
      slice.sort((a,b)=>descending?b.val-a.val:a.val-b.val);
      for(let i=0;i<slice.length;i++){
        field[r][start+i]=slice[i].val;
      }
    }
  }

  // vertical sort pass (partial, based on mouse X)
  if(pmx>0.3&&pmx<0.7){
    const vStrength=1-Math.abs(pmx-0.5)*4;
    const vLoThresh=loThresh*0.8;
    const vHiThresh=hiThresh*1.1;

    // only sort some columns for performance
    const step=Math.max(1,Math.floor(3-vStrength*2));
    for(let c=0;c<cols;c+=step){
      let spans=[];
      let spanStart=-1;
      for(let r=0;r<rows;r++){
        const v=field[r][c];
        const inRange=v>vLoThresh&&v<vHiThresh;
        if(inRange&&spanStart===-1){
          spanStart=r;
        }else if(!inRange&&spanStart!==-1){
          spans.push([spanStart,r-1]);
          spanStart=-1;
        }
      }
      if(spanStart!==-1)spans.push([spanStart,rows-1]);

      const colVals=[];
      for(let r=0;r<rows;r++)colVals.push(field[r][c]);

      for(const[start,end]of spans){
        if(end-start<2)continue;
        const slice=[];
        for(let r=start;r<=end;r++)slice.push(colVals[r]);
        slice.sort((a,b)=>a-b);
        for(let i=0;i<slice.length;i++){
          field[start+i][c]=slice[i];
        }
      }
    }
  }
}

// color from brightness - rich warm-to-cold palette
function valToColor(v,origV,isSorted){
  // base color from brightness
  let r,g,b;
  if(v<0.2){
    const f=v/0.2;
    r=8+f*20;g=6+f*15;b=15+f*40;
  }else if(v<0.4){
    const f=(v-0.2)/0.2;
    r=28+f*30;g=21+f*60;b=55+f*40;
  }else if(v<0.6){
    const f=(v-0.4)/0.2;
    r=58+f*80;g=81+f*40;b=95-f*30;
  }else if(v<0.8){
    const f=(v-0.6)/0.2;
    r=138+f*80;g=121+f*50;b=65-f*20;
  }else{
    const f=(v-0.8)/0.2;
    r=218+f*37;g=171+f*70;b=45+f*130;
  }

  // sorted streaks get color shift - push toward magenta/cyan
  if(isSorted){
    const shift=Math.sin(v*12+t*3)*0.3;
    if(shift>0){
      r=Math.min(255,r+shift*80);
      b=Math.min(255,b+shift*60);
    }else{
      g=Math.min(255,g-shift*60);
      b=Math.min(255,b-shift*40);
    }
  }

  return[Math.floor(Math.min(255,Math.max(0,r))),
         Math.floor(Math.min(255,Math.max(0,g))),
         Math.floor(Math.min(255,Math.max(0,b)))];
}

function frame(){
  t+=0.012;
  pmx+=(mx-pmx)*0.06;
  pmy+=(my-pmy)*0.06;

  // generate fresh field
  generateField();

  // store pre-sort for comparison
  const preSorted=new Array(rows);
  for(let r=0;r<rows;r++)preSorted[r]=new Float32Array(field[r]);

  // SORT
  sortField();

  // RENDER
  ctx.fillStyle='#0a0a0c';
  ctx.fillRect(0,0,W,H);

  const cw=CELL*0.55;

  for(let r=0;r<rows;r++){
    for(let c=0;c<cols;c++){
      const v=field[r][c];
      if(v<0.06)continue;

      const origV=preSorted[r][c];
      const wasSorted=Math.abs(v-origV)>0.02;
      const sortDelta=Math.abs(v-origV);

      // character from brightness
      const charIdx=Math.floor(v*(RAMP.length-1));
      let base=RAMP[Math.min(RAMP.length-1,charIdx)];

      // zalgo on sorted streaks proportional to how far the value moved
      let glyph=base;
      if(wasSorted){
        const stack=Math.min(Math.floor(sortDelta*8),4);
        if(stack>=1)glyph+=ABOVE[Math.floor((t*2+c*1.1+v*10)%ABOVE.length)];
        if(stack>=2)glyph+=BELOW[Math.floor((t*1.7+r*0.9+v*7)%BELOW.length)];
        if(stack>=3)glyph+=ABOVE[Math.floor((t*3+c*0.7+r)%ABOVE.length)];
        if(stack>=4)glyph+=STRIKE[Math.floor(t*4+c)%STRIKE.length];
      }

      // color
      const[cr,cg,cb]=valToColor(v,origV,wasSorted);

      // streak glow: sorted areas slightly brighter
      const brightness=wasSorted?1+sortDelta*0.5:1;
      const fr=Math.min(255,Math.floor(cr*brightness));
      const fg=Math.min(255,Math.floor(cg*brightness));
      const fb=Math.min(255,Math.floor(cb*brightness));

      ctx.fillStyle=`rgb(${fr},${fg},${fb})`;
      ctx.fillText(glyph,c*cw,r*CELL);
    }
  }

  // cursor
  const curX=pmx*W,curY=pmy*H;
  // threshold indicator lines
  const loThresh=Math.max(0.05,pmy*0.5-0.1);
  const hiThresh=Math.min(0.98,pmy*0.5+0.4);
  ctx.fillStyle='rgba(255,255,255,0.12)';
  ctx.fillRect(0,0,4,H);
  const loY=loThresh*H,hiY=hiThresh*H;
  ctx.fillStyle='rgba(255,100,180,0.25)';
  ctx.fillRect(0,loY,6,hiY-loY);

  // crosshair
  ctx.fillStyle='rgba(220,200,255,0.5)';
  ctx.font='14px Courier New';
  ctx.fillText('\u253C',curX-4,curY-6);
  ctx.font=CELL+'px Courier New';

  requestAnimationFrame(frame);
}

document.addEventListener('mousemove',e=>{mx=e.clientX/W;my=e.clientY/H});
document.addEventListener('touchmove',e=>{e.preventDefault();mx=e.touches[0].clientX/W;my=e.touches[0].clientY/H},{passive:false});

// click: drop a bright spot that disrupts sorting
document.addEventListener('click',e=>{
  // handled through mouse proximity in field generation
  // but also pulse the time forward for visual burst
  t+=0.15;
});

window.addEventListener('resize',resize);
resize();
frame();
</script>
</body>
</html>