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

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
<!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:#08060e;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=13;
let W,H,cols,rows;
let mx=0.5,my=0.5,pmx=0.5,pmy=0.5;
let mxv=0,myv=0,prevMx=0.5,prevMy=0.5;
let t=0;
let energy;

// combining marks - small curated sets
const ABOVE=['\u0300','\u0301','\u0302','\u0303','\u0304','\u0307','\u0308','\u030A','\u030C','\u0311'];
const BELOW=['\u0323','\u0324','\u0325','\u0326','\u0327','\u0330','\u0331','\u0332'];
const OVERLAY=['\u0334','\u0335','\u0336'];

const CALM='\u00B7 \u2027 \u2219 . - ~'.split(' ');
const MID='\u2500\u2502\u256D\u256E\u256F\u2570\u2571\u2572'.split('');
const DENSE='\u2591\u2592\u2593\u25A0\u25C6'.split('');

let vortices=[];

function resize(){
  W=window.innerWidth;H=window.innerHeight;
  cv.width=W;cv.height=H;
  cols=Math.floor(W/(CELL*0.58));
  rows=Math.floor(H/(CELL*1.1));
  energy=new Float32Array(cols*rows);
  ctx.font=CELL+'px Courier New';
  ctx.textBaseline='top';
  vortices=[
    {x:0.35,y:0.4,vx:0.001,vy:0.0008,strength:1,spin:1},
    {x:0.65,y:0.6,vx:-0.0008,vy:0.001,strength:0.8,spin:-1}
  ];
}

function noise(x,y,s){
  return Math.sin(x*s+t*0.8)*Math.cos(y*s*0.7+t*0.6)+Math.sin((x+y)*s*0.5+t)*0.4;
}

function frame(){
  t+=0.018;

  mxv=mx-prevMx;myv=my-prevMy;
  prevMx=mx;prevMy=my;
  pmx+=(mx-pmx)*0.08;
  pmy+=(my-pmy)*0.08;
  const mouseSpeed=Math.sqrt(mxv*mxv+myv*myv)*80;

  // update vortices
  for(const v of vortices){
    v.x+=v.vx;v.y+=v.vy;
    v.vx+=(0.5-v.x)*0.00008;
    v.vy+=(0.5-v.y)*0.00008;
    if(v.x<0.08||v.x>0.92)v.vx*=-0.7;
    if(v.y<0.08||v.y>0.92)v.vy*=-0.7;
  }

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

      let en=Math.abs(noise(fx,fy,5))*0.15;

      for(const v of vortices){
        const dx=fx-v.x,dy=fy-v.y;
        const d=Math.sqrt(dx*dx+dy*dy)+0.02;
        en+=v.strength/(d*10+0.8)*0.5;
      }

      // mouse influence
      const md=Math.sqrt((fx-pmx)**2+(fy-pmy)**2)+0.02;
      en+=(0.8+mouseSpeed*3)/(md*14+0.6)*0.4;

      energy[idx]=energy[idx]*0.75+en*0.25;
    }
  }

  ctx.fillStyle='#08060e';
  ctx.fillRect(0,0,W,H);

  const cw=CELL*0.58;
  const ch_h=CELL*1.1;

  for(let r=0;r<rows;r++){
    for(let c=0;c<cols;c++){
      const idx=r*cols+c;
      const en=energy[idx];
      if(en<0.12)continue;

      const norm=Math.min(en/2.5,1);

      // base character
      let base;
      if(norm<0.25){
        base=CALM[Math.floor(Math.abs(noise(c*0.4,r*0.4,1.5))*CALM.length)%CALM.length];
      }else if(norm<0.55){
        const angle=noise(c*0.2,r*0.2,3)+t;
        base=MID[Math.floor((angle*2+8)%MID.length)];
      }else{
        base=DENSE[Math.floor(norm*DENSE.length)%DENSE.length];
      }

      // combining marks - gentle, max 3 total
      let glyph=base;
      if(norm>0.35){
        const count=Math.min(Math.floor((norm-0.35)*4.5),3);
        for(let i=0;i<count;i++){
          if(i%2===0){
            glyph+=ABOVE[Math.floor((t*2+c*1.3+i*3)%ABOVE.length)];
          }else{
            glyph+=BELOW[Math.floor((t*1.5+r*1.7+i*2.5)%BELOW.length)];
          }
        }
      }
      if(norm>0.8){
        glyph+=OVERLAY[Math.floor(t*3)%OVERLAY.length];
      }

      // color - muted, cool palette
      const flowAngle=noise(c*0.15,r*0.15,4)*3.14+t*0.5;
      const hue=(flowAngle/6.28*360+180)%360;
      const sat=25+norm*25;
      const lit=10+norm*40;

      const hp=((hue%360)+360)%360;
      const sp=sat/100,lp=lit/100;
      const kk=n=>(n+hp/30)%12;
      const aa=sp*Math.min(lp,1-lp);
      const ff=n=>lp-aa*Math.max(-1,Math.min(kk(n)-3,9-kk(n),1));
      let cr=Math.round(ff(0)*255);
      let cg=Math.round(ff(8)*255);
      let cb=Math.round(ff(4)*255);

      // gentle mouse glow
      const mdist=Math.sqrt((c/cols-pmx)**2+(r/rows-pmy)**2);
      if(mdist<0.06){
        const boost=1-mdist/0.06;
        cr=Math.min(255,cr+Math.floor(boost*80));
        cg=Math.min(255,cg+Math.floor(boost*80));
        cb=Math.min(255,cb+Math.floor(boost*80));
      }

      ctx.fillStyle=`rgb(${cr},${cg},${cb})`;
      ctx.fillText(glyph,c*cw,r*ch_h);
    }
  }

  // cursor
  const curX=pmx*W,curY=pmy*H;
  let cur='\u2316';
  if(mouseSpeed>0.3)cur+=ABOVE[Math.floor(t*4)%ABOVE.length];
  ctx.fillStyle='rgba(200,220,240,0.6)';
  ctx.font='14px Courier New';
  ctx.fillText(cur,curX-5,curY-7);
  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});

document.addEventListener('click',e=>{
  vortices.push({
    x:e.clientX/W,y:e.clientY/H,
    vx:(Math.random()-0.5)*0.003,
    vy:(Math.random()-0.5)*0.003,
    strength:0.6+Math.random()*0.6,
    spin:Math.random()<0.5?1:-1
  });
  if(vortices.length>5)vortices.shift();
});

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