three+gsap实现鼠标滚动火苗变大动画效果代码-html代码-BFW代码库

three+gsap实现鼠标滚动火苗变大动画效果代码

代码语言：html

所属分类：动画

代码描述：three+gsap实现鼠标滚动火苗变大动画效果代码，鼠标向下滚动浏览器试试。

下面为部分代码预览，完整代码请点击下载或在bfwstudio webide中打开

<!DOCTYPE html>
<html lang="en" >

<head>

  <meta charset="UTF-8">
  

  
  
  
  
<style>
html, body {
    padding: 0;
    margin: 0;
    background-color: black;
}

.scroll-space {
    height: 250vh;
}

.container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 4vw;
}

#canvas {
    position: absolute;
    top: 0;
    left: 0;
}
</style>




</head>

<body >
  <div class="scroll-space"></div>
<div class="container">
    Fire Scroll
    <canvas id="canvas"></canvas>
</div>


<script type="x-shader/x-fragment" id="fragmentShader">

    varying vec2 vUv;
    uniform float u_ratio;
    uniform float u_time;
    uniform float u_speed;
    uniform float u_shape_offset;
    uniform float u_power;
    uniform float u_addition;

    // Simplex noise taken from
    // https://gist.github.com/patriciogonzalezvivo/670c22f3966e662d2f83
    vec3 permute(vec3 x) { return mod(((x*34.0)+1.0)*x, 289.0); }
    float snoise(vec2 v){
        const vec4 C = vec4(0.211324865405187, 0.366025403784439,
        -0.577350269189626, 0.024390243902439);
        vec2 i = floor(v + dot(v, C.yy));
        vec2 x0 = v - i + dot(i, C.xx);
        vec2 i1;
        i1 = (x0.x > x0.y) ? vec2(1.0, 0.0) : vec2(0.0, 1.0);
        vec4 x12 = x0.xyxy + C.xxzz;
        x12.xy -= i1;
        i = mod(i, 289.0);
        vec3 p = permute(permute(i.y + vec3(0.0, i1.y, 1.0))
        + i.x + vec3(0.0, i1.x, 1.0));
        vec3 m = max(0.5 - vec3(dot(x0, x0), dot(x12.xy, x12.xy),
        dot(x12.zw, x12.zw)), 0.0);
        m = m*m;
        m = m*m;
        vec3 x = 2.0 * fract(p * C.www) - 1.0;
        vec3 h = abs(x) - 0.5;
        vec3 ox = floor(x + 0.5);
        vec3 a0 = x - ox;
        m *= 1.79284291400159 - 0.85373472095314 * (a0*a0 + h*h);
        vec3 g;
        g.x = a0.x * x0.x + h.x * x0.y;
        g.yz = a0.yz * x12.xz + h.yz * x12.yw;
        return 130.0 * dot(m, g);
    }

    // Color space transform taken from
    // https://gist.github.com/983/e170a24ae8eba2cd174f
    vec3 hsv2rgb(vec3 c) {
        vec4 K = vec4(1.0, 2.0 / 3.0, 1.0 / 3.0, 3.0);
        vec3 p = abs(fract(c.xxx + K.xyz) * 6.0 - K.www);
        return c.z * mix(K.xxx, clamp(p - K.xxx, 0.0, 1.0), c.y);
    }

    const float STEPS = 4.;

    float get_noise(vec2 uv, float t){
        float SCALE = 8.;
        float noise = snoise(vec2(uv.x * SCALE, uv.y * .4 * SCALE - t));
        SCALE = 10.;
        noise += .2 * snoise(vec2(uv.x * SCALE + 1.5 * t, uv.y * .6 * SCALE));
        noise = min(1., .5 * noise + u_addition);
        return noise;
    }


    void main () {
        vec2 uv = vUv;
        uv.y /= u_ratio;

        float t = u_time * u_speed;

        float noise = get_noise(uv, t);
        float shape = pow(.8 * uv.y * u_ratio, .5);
        shape += 5. * pow(abs(uv.x - .5), 2.);
        shape *= u_shape_offset;

        float stepped_noise = floor(get_noise(uv, t) * STEPS) / STEPS;
        float d = pow(stepped_noise, u_p.........完整代码请登录后点击上方下载按钮下载查看