xamxidu/index.html at main · giangntse150746/xamxidu · GitHub

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<!DOCTYPE html>
<html>
<head>
    <title>Bloom</title>
    <style>
        body {
            margin: 0;
            padding: 0;
        }

        #container {
            position: fixed;
        }
    </style>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/r128/three.min.js"></script>

</head>
<body>
    <script id="vertexShader" type="x-shader/x-vertex">
        void main() {
            gl_Position = vec4( position, 1.0 );
        }
    </script>
    <script id="fragmentShader" type="x-shader/x-fragment">
        // By Liam Egan
        // 2018

        uniform vec2 u_resolution;
        uniform float u_time;

        const int octaves = 6;
        const float seed = 43758.5453123;
        const float seed2 = 73156.8473192;

        vec2 random2(vec2 st, float seed){
            st = vec2( dot(st,vec2(127.1,311.7)),
                    dot(st,vec2(269.5,183.3)) );
            return -1.0 + 2.0*fract(sin(st)*seed);
        }

        // Value Noise by Inigo Quilez - iq/2013
        // https://www.shadertoy.com/view/lsf3WH
        float noise(vec2 st, float seed) {
            vec2 i = floor(st);
            vec2 f = fract(st);

            vec2 u = f*f*(3.0-2.0*f);

            return mix( mix( dot( random2(i + vec2(0.0,0.0), seed ), f - vec2(0.0,0.0) ),
                            dot( random2(i + vec2(1.0,0.0), seed ), f - vec2(1.0,0.0) ), u.x),
                        mix( dot( random2(i + vec2(0.0,1.0), seed ), f - vec2(0.0,1.0) ),
                            dot( random2(i + vec2(1.0,1.0), seed ), f - vec2(1.0,1.0) ), u.x), u.y);
        }

        float fbm1(in vec2 _st, float seed) {
        float v = 0.0;
        float a = 0.5;
        vec2 shift = vec2(100.0);
        // Rotate to reduce axial bias
        mat2 rot = mat2(cos(0.5), sin(0.5),
                        -sin(0.5), cos(0.50));
        for (int i = 0; i < octaves; ++i) {
            v += a * noise(_st, seed);
            _st = rot * _st * 2.0 + shift;
            a *= 0.4;
        }
        return v;
        }

        float pattern(vec2 uv, float seed, float time, inout vec2 q, inout vec2 r) {

        q = vec2( fbm1( uv + vec2(0.0,0.0), seed ),
                        fbm1( uv + vec2(5.2,1.3), seed ) );

        r = vec2( fbm1( uv + 4.0*q + vec2(1.7 - time / 2.,9.2), seed ),
                        fbm1( uv + 4.0*q + vec2(8.3 - time / 2.,2.8), seed ) );

        vec2 s = vec2( fbm1( uv + 4.0*r + vec2(21.7 - time / 2.,90.2), seed ),
                        fbm1( uv + 4.0*r + vec2(80.3 - time / 2.,20.8), seed ) );

        vec2 t = vec2( fbm1( uv + 4.0*s + vec2(121.7 - time / 2.,90.2), seed ),
                        fbm1( uv + 4.0*s + vec2(180.3 - time / 2.,20.8), seed ) );

        float rtn = fbm1( uv + 4.0*t, seed );

        rtn = clamp(rtn, 0., .5); // This shit is magic!

        return rtn;
        }

        void main() {
        vec2 uv = (gl_FragCoord.xy - 0.5 * u_resolution.xy) / u_resolution.y;
        uv *= 1. + dot(uv, uv)*.3;


        float time = u_time / 20.;

        mat2 rot = mat2(cos(time), sin(time),
                        -sin(time), cos(time));
        uv = rot * uv;
        uv *= 1.4 + sin(time) * .3;
        uv.x -= time;

        vec2 q = vec2(0.,0.);
        vec2 r = vec2(0.,0.);

        vec3 colour = vec3(pattern(uv, seed, time, q, r));
        float QR = clamp(dot(q, r), -1., 1.);
        colour += vec3(
            (q.x + q.y) + QR * 30.,
            QR * 15.,
            r.x * r.y + QR * 5.
        );
        colour += .1;
        colour = clamp(colour, 0.05, 1.);


        // colour = vec3(QR * 200.);
        // colour.r -= dot(q, r) * 15.;
        // colour.g += r.x;
        // colour = mix(colour, vec3(pattern(uv * r, seed2, time, q, r), dot(q, r) * 15., 0.), .5);
        // colour -= q.y * 1.5;
        // colour.g += dot(q, r) * 15.;

        // colour = hsv2rgb(colour);

        // gl_FragColor = vec4(abs(colour), 1.);
        gl_FragColor = vec4(colour + (abs(colour) * .5), 1.);
        }
    </script>

    <div id="container"></div>
</body>
<script src="js/index_render.js"></script>
</html>