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<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Taar-O</title>
<link href="https://fonts.googleapis.com/css2?family=Audiowide&display=swap" rel="stylesheet">
<style>
* { margin: 0; padding: 0; }
#CANVAS { color:#000; top:0; left:0; position:absolute; width: 100%; height: 100%; }
#FPS { color:#FFF; top:0; left:0; position:absolute; pointer-events:none; padding: 12px; font-family: monospace; }
html, body { width: 100%; height: 100%; overflow: hidden; }
/* Overlay container */
#overlay {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
display: flex;
align-items: center;
justify-content: center;
pointer-events: none;
z-index: 10;
}
/* Logo SVG */
#logo {
width: 120px;
height: 120px;
margin-bottom: 20px;
animation: float 3s ease-in-out infinite;
}
/* Main text container */
#textContainer {
text-align: center;
animation: float 3s ease-in-out infinite;
}
#mainText {
font-family: 'Audiowide', sans-serif;
font-size: clamp(48px, 12vw, 96px);
font-weight: 700;
background: linear-gradient(135deg, #ff3d00, #ff9100, #ffb300);
-webkit-background-clip: text;
-webkit-text-fill-color: transparent;
background-clip: text;
margin: 0;
letter-spacing: 1px;
filter: drop-shadow(0 0 15px rgba(255, 100, 0, 0.8)) drop-shadow(0 0 30px rgba(255, 50, 0, 0.5));
}
#subText {
font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
font-size: clamp(16px, 2.5vw, 24px);
color: rgba(255, 255, 255, 0.7);
margin-top: 16px;
letter-spacing: 1px;
text-transform: uppercase;
font-weight: 300;
filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.8));
}
/* Floating animation */
@keyframes float {
0%, 100% { transform: translateY(0px); }
50% { transform: translateY(-20px); }
}
/* Bottom left info text */
#infoText {
position: absolute;
bottom: 30px;
left: 30px;
font-family: monospace;
font-size: 0.9em;
color: rgba(255, 153, 0, 0.7);
line-height: 1.6;
pointer-events: none;
max-width: 300px;
}
</style>
<script type='x-shader/x-fragment' id='h'>
//
// Exploring noise
//
// skal/ (Pascal Massimino) [pascal.massimino@gmail.com]
// License: Creative Commons Attribution-NonCommercial-ShareAlike 4.0
//
#define eps .01
#define DMAX 10.
#define MAX_ITER 30
#define FBM_ITER 8
#define R0 0.5
#define SP0 vec3(.0, .0, .0)
vec3 SP1;
const vec3 lightDir = normalize(vec3(1., 1., 1.));
const vec3 lightCol = vec3(.6, .6, .4);
float gyroid(vec3 p) {
return abs(.05 + dot(sin(p), cos(p.zxy)));
}
float fbm(vec3 p, float tau) {
float a = tau, v = 0.;
for (int i = 0; i < FBM_ITER; ++i, a *= tau) {
p.z += v * .4;
v += gyroid(p / a) * a;
}
return v;
}
vec2 testMin(vec2 hit, float d, float id) {
return (d > hit.x) ? hit : vec2(d, id);
}
vec2 scene(vec3 p) {
vec2 dmin = vec2(DMAX, 0.);
float r0 = R0 + .1 * fbm(p + .1 * vec3(iTime * .4, 0., 0.), .5);
float r1 = .3 + .1 * fbm(p * 3., .3);
dmin = testMin(dmin, length(p - SP0) - r0, 1.);
dmin = testMin(dmin, length(p - SP1) - r1, 2.);
return dmin;
}
vec3 normal(vec3 p) {
const vec2 EPS = vec2(0., 0.01);
#if 0
vec3 n = vec3(scene(p + EPS.yxx).x - scene(p - EPS.yxx).x,
scene(p + EPS.xyx).x - scene(p - EPS.xyx).x,
scene(p + EPS.xxy).x - scene(p - EPS.xxy).x);
#else
vec3 n = vec3(scene(p + EPS.yxx).x, scene(p + EPS.xyx).x, scene(p + EPS.xxy).x) - scene(p).xxx;
#endif
return normalize(n);
}
vec3 trace(vec3 p, vec3 dir) {
float d = eps, hmin = DMAX;
for (int i = 0; d < DMAX && i < MAX_ITER; ++i) {
vec2 h = scene(p + d * dir);
hmin = min(hmin, h.x);
if (abs(h.x) < eps) return vec3(d, h.y, hmin);
d += h.x * .9;
if (d >= DMAX) break;
}
return vec3(DMAX, 0., hmin); // sky
}
bool shadow(vec3 p, vec3 dir) {
vec3 h = trace(p, dir);
return (h.x < DMAX);
}
mat3 makeCam(vec3 target, vec3 origin) {
vec3 up = vec3(0., 0., 1.);
vec3 front = normalize(target - origin);
vec3 left = cross(up, front);
up = cross(front, left);
return mat3(left, up, front);
}
vec3 getColor(vec3 p) {
vec3 c0 = vec3(.2, .6, .7), c1 = vec3(.6, .4, .3);
float t = atan(p.y, p.x);
vec3 c = mix(c0, c1, cos(10. * t + 32. * p.z));
return c;
}
void mainImage(out vec4 fragColor, in vec2 fragCoord) {
vec2 uv = 2. * (fragCoord - iResolution.xy * 0.5) / min(iResolution.x, iResolution.y);
float t = iTime * .4;
SP1 = 1. * cross(vec3(cos(t), sin(t), 0.), normalize(vec3(1., 1., -1.)));
float focal = 1.5;
vec3 target = vec3(0., 0., 0.);
vec3 origin = vec3(2. * cos(t * .3), 2. * sin(t * .3), .5);
mat3 cam = makeCam(target, origin);
vec3 dir = normalize(cam * vec3(uv, focal));
vec3 h = trace(origin, dir);
vec3 col;
if (h.y > 0.) {
vec3 p = origin + h.x * dir; // hit point
vec3 n = normal(p);
float l = max(0., dot(n, lightDir));
if (l > 0. && shadow(p + n * 0.01, lightDir)) l *= 0.1;
vec3 base = (h.y == 1.) ? getColor(p) : vec3(.3, .6, .5);
col = base * mix(0.2, 1.0, l);
if (l > 0.) col += lightCol * smoothstep(0.95, 1.0, dot(reflect(dir, n), lightDir));
} else { // 'sky'
col = vec3(.30, .25, .30) * fbm(dir, .5); // base 'clouds'
col += lightCol * smoothstep(.9, 1., dot(dir, lightDir)); // global diffuse
col = mix(col, vec3(.6, .8, .6), 0.015 / h.z); // halo
}
fragColor = vec4(col, 1.);
}
/////////// END OF THE SHADER CODE PROPER ///////////
</script>
<script type='x-shader/x-fragment' id='e'>
uniform int iFrame;
uniform float iTime, iTimeDelta;
uniform vec3 iResolution;
uniform vec4 iMouse;
</script>
<script>
var last_frame = 0|0, last_time = 0; // for FPS
// uniforms:
var u = { frame_count: last_frame,
time: last_time,
mouse:new Float32Array([0,0,-1,-1]),
screen:new Float32Array([9,6,1]) };
// global vars:
var cvs, m, prog;
function ge(a) { return document.getElementById(a); }
function gt(a) { return ge(a).innerHTML; }
function ael(n, f) { document.addEventListener(n, f, false); }
function loop() {
cvs.width = window.innerWidth;
cvs.height = window.innerHeight;
const w = u.screen[0] = m.drawingBufferWidth;
const h = u.screen[1] = m.drawingBufferHeight;
m.viewport(0, 0, w, h);
m.scissor(0, 0, w, h);
function ul(name) { return m.getUniformLocation(prog, name); }
const prev_time = u.time;
u.time = performance.now() * .001;
const dtime = u.time - prev_time;
m.uniform1i(ul("iFrame"), u.frame_count++);
m.uniform1f(ul("iTime"), u.time);
m.uniform1f(ul("iTimeDelta"), dtime);
m.uniform4fv(ul("iMouse"), u.mouse);
m.uniform3fv(ul("iResolution"), u.screen);
m.drawArrays(m.TRIANGLES, 0, 3);
const et = u.time - last_time; // compute FPS every ~2 secs
if (et >= 2.) {
const fps = (u.frame_count - last_frame) / et;
ge("FPS").innerHTML = fps.toFixed(1) + " fps";
last_frame = u.frame_count;
last_time = u.time;
}
requestAnimationFrame(loop);
}
function go() {
function updateMouse(e) {
u.mouse[0] = e.clientX * u.screen[0] / innerWidth;
u.mouse[1] = u.screen[1] - e.clientY * u.screen[1] / innerHeight;
}
ael('mousemove', e => { if (u.mouse[2] >= 0) updateMouse(e)});
ael('mousedown', e => { updateMouse(e); if (u.mouse[2] < 0) { u.mouse[2] = u.mouse[0]; u.mouse[3] = u.mouse[1]}});
ael('mouseup', e => { updateMouse(e); u.mouse[2]=-Math.abs(u.mouse[2]); u.mouse[3]=-Math.abs(u.mouse[3])});
ael('keydown', e => { });
cvs = ge("CANVAS");
m = cvs.getContext("webgl2",
{ alpha:false, depth:false, stencil:false, premultipliedAlpha:false, antialias:false, preserveDrawingBuffer:true });
const hdr = "#version 300 es\nprecision highp float;\n";
const vtxSrc = hdr + "\nconst vec2[3] t=vec2[](vec2(3,-1),vec2(-1,-1),vec2(-1,3));void main(){gl_Position=vec4(t[gl_VertexID],0,1);}";
const frgSrc = hdr + gt('e') + gt('h') + "out vec4 o;void main(){mainImage(o,gl_FragCoord.xy);}";
function err(a, b) { alert(a + "\n" + b); return null; }
function compileShader(sh_type, src, name) {
const sh = m.createShader(sh_type);
m.shaderSource(sh, src);
m.compileShader(sh);
if (!m.getShaderParameter(sh, m.COMPILE_STATUS))
return err(name, m.getShaderInfoLog(sh));
return sh;
}
const vtx_sh = compileShader(m.VERTEX_SHADER, vtxSrc, 'vtx');
const frg_sh = compileShader(m.FRAGMENT_SHADER, frgSrc, 'frg');
prog = m.createProgram();
m.attachShader(prog, vtx_sh);
m.attachShader(prog, frg_sh);
m.linkProgram(prog);
if (!m.getProgramParameter(prog, m.LINK_STATUS))
return err('link', m.getProgramInfoLog(prog));
m.useProgram(prog);
loop(); // go!
}
</script>
</head>
<body onload="go()">
<canvas id='CANVAS'></canvas>
<div id='FPS'></div>
<div id='overlay'>
<div>
<svg id='logo' viewBox='0 0 120 120' xmlns='http://www.w3.org/2000/svg'>
<!-- Outer ring -->
<circle cx='60' cy='60' r='55' fill='none' stroke='url(#gradient)' stroke-width='2' opacity='0.8'/>
<!-- Inner circles -->
<circle cx='60' cy='60' r='40' fill='none' stroke='url(#gradient)' stroke-width='1.5' opacity='0.6'/>
<circle cx='60' cy='60' r='25' fill='url(#gradient)' opacity='0.2'/>
<!-- Center point -->
<circle cx='60' cy='60' r='4' fill='url(#gradient)'/>
<defs>
<linearGradient id='gradient' x1='0%' y1='0%' x2='100%' y2='100%'>
<stop offset='0%' style='stop-color:#ff3d00;stop-opacity:1' />
<stop offset='100%' style='stop-color:#ff9100;stop-opacity:1' />
</linearGradient>
</defs>
</svg>
<div id='textContainer'>
<h1 id='mainText'>TAAR-O</h1>
<p id='subText'>Exploring Noise</p>
</div>
</div>
</div>
<div id='infoText'>
(c) MASSIMINO Pascal - Metaskal.com
</div>
</body>
</html>
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