three实现变色粒子在容器中碰撞动画效果代码-html代码-BFW代码库

three实现变色粒子在容器中碰撞动画效果代码

代码语言：html

所属分类：粒子

代码描述：three实现变色粒子在容器中碰撞动画效果代码

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">

  <meta name="viewport" content="width=device-width, initial-scale=1">
  
  
  
<style>
@import url("https://fonts.googleapis.com/css?family=Inconsolata:400,400i,700");
* {
  margin: 0;
  padding: 0;
}

html,
body {
  overflow: hidden;
  font-family: Inconsolata, sans-serif;
  color: #eee;
}
h1 {
  position: relative;
  z-index: 1;
  padding: 1rem;
  font-weight: 400;
  font-size: 1rem;
}
.webgl {
  position: fixed;
  top: 0;
  left: 0;
  outline: none;
}
</style>



</head>

<body  >
  <canvas class="webgl"></canvas>


<script type="x-shader/x-vertex" id="vertexShader">
  uniform mat4 projectionMatrix;
uniform mat4 viewMatrix;
uniform mat4 modelMatrix;
attribute vec3 position;
attribute vec2 uv;
varying vec2 vUv;

void main()
{
    vec4 pos=vec4(position,1.);
    vec4 modelPosition=modelMatrix*vec4(position,1.);
    vec4 viewPosition=viewMatrix*modelPosition;
    vec4 projectedPosition=projectionMatrix*viewPosition;
    vUv=uv;
    gl_Position=projectedPosition;
}
</script>

<script type="x-shader/x-fragment" id="fragmentShader">
  precision mediump float;

uniform float u_time;
varying vec2 vUv;

#define PI 3.141592653589
#define TWO_PI 6.28318530718

float rand(float x) { return fract(sin(x * 1.14529) * 43758.5453123); }

vec3 light_point(vec2 xy, vec2 center, vec3 color, float strength, float threshold) {
  vec3 clr = vec3(0.0);
  float l = length(xy - center);
  clr += (strength / l) * smoothstep(0.0, threshold, strength / l);
  return clr * color;
}

vec3 hsl2rgb(vec3 c) {
  vec3 rgb = clamp(abs(mod(c.x * 6.0 + vec3(0.0, 4.0, 2.0), 6.0) - 3.0) - 1.0,
                   0.0, 1.0);
  return c.z + c.y * (rgb - 0.5) * (1.0 - abs(2.0 * c.z - 1.0));
}

void main() {
  vec2 uv = vUv;
  vec2 center = vec2(.5);
  vec3 color = vec3(.0);
  const int count = 150;
  
  float t = 12. + TWO_PI * u_time * .25;
  for (int i = 0; i < count; i++) {
    float j = rand(float(i));
    //vec3 rgb_color = hsl2rgb(vec3(sin(u_time * .25) + j * .125, 0.5, .5));
    vec3 rgb_color = vec3(0.7, 0.2 + 0.6 *sin(u_time), .1 + j);
    vec3 new_c =
        light_point(uv,
                    center + vec2(0.35 * 1. * sin(j + 1. + 2. *  t * j),
                                  +.45 * sin(j * .75 * PI + PI +  t)),
                    rgb_color, 0.0025, .8 - .2*(1. - (1. - uv.y)* uv.y) );

    color += new_c;
  }

  gl_FragColor = vec4(vec3(color), 1.0);
}

</script>


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