twgljs实现webgl canvas文字圈圈闪烁动画效果代码-html代码-BFW代码库

代码语言：html

所属分类：动画

代码描述：twgljs实现webgl canvas文字圈圈闪烁动画效果代码

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">
  

  
  
  
  
<style>
html {
  height: 100%;
}
body {
  background: #333;
  overflow: hidden;
  padding: 0;
  margin: 0;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
}
canvas {
  height: 100%;
  width: 100%;
  margin: auto;
}
</style>

  
  
</head>

<body translate="no">
  <canvas id="canvas"></canvas>
<!-- VertexShader code here -->
<script id="vertexShader" type="x-shader/x-vertex">#version 300 es
precision highp float;
  in vec4 position;

  void main() {
    gl_Position = vec4( position );
  }
</script>

<!-- FragmentShader code here -->
<script id="fragmentShader" type="x-shader/x-fragment">#version 300 es
precision highp float;
out vec4 fragColor;
uniform vec2 u_resolution;
uniform float u_time;
uniform vec4 u_mouse;
  
#define R           u_resolution
#define T           u_time
#define M           u_mouse

#define PI          3.141592653
#define PI2         6.283185307

#define MIN_DIST    1e-4
#define MAX_DIST    55.

// constants
const float sz = .425;
const float hf = sz/2.;

const vec4 bz = vec4(.075,.055,.035,.0);
const vec4 bo = vec4(.175,.15,.075,.025);
const vec2 oa = vec2(.15,.1);

vec3 hue(float t){ return .55 + .45*cos(PI2*t*(vec3(.95,.97,.98)+vec3(1,.5,.2))); }
float hash21(vec2 p){return fract(sin(dot(p,vec2(27.619,57.583)))*4358.5453);}
mat2 rot(float a){return mat2(cos(a),sin(a),-sin(a),cos(a)); }

float box( in vec2 p, in vec2 b ){
    vec2 d = abs(p)-b;
    return length(max(d,0.))+min(max(d.x,d.y),0.);
}

float rbox( in vec2 p, in vec2 b, in vec4 r ) {
    r.xy = (p.x>0.)?r.xy : r.zw;
    r.x  = (p.y>0.)?r.x  : r.y;
    vec2 q = abs(p)-b+r.x;
    return min(max(q.x,q.y),0.)+length(max(q,0.))-r.x;
}
// special
float getdp(vec2 p) {
    float bt = length(p)-.075;
    return bt;
}
// number
float get3(vec2 p) {
    vec2 of = vec2(0,.075);
    float bt = max(
    rbox(p-of,oa,bz.xxww),
    -rbox(p-of+vec2(.05,0),vec2(.15,.05),bz.zzww)
    );
    float bb = max(
    rbox(p+of,oa,bz.xxww),
    -rbox(p+of+vec2(.05,0),vec2(.15,.05),bz.zzww)
    );
    return min(bt,bb);
}
//letters
float getA(vec2 p) {
    vec2 of = vec2(0,.075);
    float bt = max(
    rbox(p,vec2(.15,.175),bz.xwxw),
    -rbox(p+vec2(.0,.05),vec2(.1,.175),bz.zwzw)
    );
    float bb = box(p,vec2(.15,.025));
    return min(bt,bb);
}
float getB(vec2 p) {
    vec2 of = vec2(0,.075);
    float bt = max(
        rbox(p-of,oa,bz.xxww),
        -rbox(p-of,vec2(.1,.05),bz.zzww)
    );
    float bb = max(
        rbox(p+of,oa,bz.xxww),
        -rbox(p+of,vec2(.1,.05),bz.zzww)
    );
    return min(bt,bb);
}
float getC(vec2 p) {
    float bt = max(
        rbox(p,vec2(.15,.175),bz.wwxx),
        -rbox(p-vec2(.05,0),vec2(.15,.125),bz.wwzz)
    );
    return bt;
}
float getD(vec2 p) {
    float bt = max(rbox(p,vec2(.15,.175),bz.xxww),
    -rbox(p,vec2(.1,.125),vec4(.035,.035,0,0)));
    return bt;
}
float getE(vec2 p) {
    vec2 of = vec2(0,.075);
    float bt = max(
        rbox(p-of,oa,bz.wwxx),
        -rbox(p-of-vec2(.05,0),vec2(.15,.05),bz.wwzz)
    );
    float bb = max(
        rbox(p+of,oa,bz.wwxx),
        -rbox(p+of-vec2(.05,0),vec2(.15,.05),bz.wwzz)
    );
    return min(bt,bb);
}
float getF(vec2 p) {
    float bt = min(
        box(vec2(p.x+.125,p.y),vec2(.025,.175)),
        box(vec2(p.x,abs(p.y-.075)-.075),vec2(.15,.025))
    );
    return bt;
}
float getG(vec2 p) {
    float bt = max(
        rbox(p,vec2(.15,.175),bz.wwxx),
        -rbox(p-vec2(.05,0),vec2(.15,.125),bz.wwzz)
    );
    float bf = min(
        box(vec2(p.x-.125,p.y+.075),vec2(.025,.1)),
        box(vec2(p.x-.05,p.y),vec2(.1,.025))
    );
    return min(bt,bf);
}
float getH(vec2 p) {
    float bt = min(
        box(vec2(abs(p.x)-.125,p.y),vec2(.025,.175)),
        box(p,vec2(.15,.025))
    );
    return bt;
}
float getI(vec2 p) {
    float bt = min(
        box(p,vec2(.025,.175)),
        box(vec2(p.x,abs(p.y)-.15),vec2(.15,.025))
    );
    return bt;
}
float getJ(vec2 p) {
    float bt = max(
        rbox(p,vec2(.15,.175),vec4(.0,.1,0,0)),
        -rbox(p+vec2(.05,-.05),vec2(.15,.175),vec4(.0,.055,0,0))
    );
    return bt;
}
float getK(vec2 p) {
    float bt = max(
        rbox(p-vec2(0,.075),oa,vec4(.0,.1,0,0)),
        -rbox(p-vec2(0,.12),vec2(.1,.095),vec4(.0,.055,0,0))
    );
    float bb = max(
        rbox(p+vec2(0,.075),oa,vec4(.1,.0,0,0)),
        -rbox(p+vec2(0,.12),vec2(.1,.095),vec4(.055,.0,0,0))
    );
    return min(bt,bb);
}
float getL(vec2 p) {
    float bt = min(
        box(p+vec2(.125,0),vec2(.025,.175)),
        box(p+vec2(0,.15),vec2(.15,.025))
    );
    return bt;
}
float getM(vec2 p) {
    vec2 of = vec2(.065,0);
    float bt = max(
        rbox(p+of,vec2(.085,.175),bz.xwxw),
        -rbox(p+of+vec2(.0,.05),vec2(.0375,.175),bz.zwzw)
    );
    float bb = max(
        rbox(p-of,vec2(.085,.175),bz.xwxw),
        -rbox(p-of+vec2(.0,.05),vec2(.0375,.175),bz.zwzw)
    );
    return min(bt,bb);
}
float getN(vec2 p) {
    float bt = max(
        rbox(p,vec2(.15,.175),bz.xwxw),
        -rbox(p+vec2(.0,.045),vec2(.1,.175),bz.zwzw)
    );
    return bt;
}
float getO(vec2 p) {
    float bt = max(
        rbox(p,vec2(.15,.175),bz.xxxx),
        -rbox(p,vec2(.1,.125),bz.zzzz)
    );
    return bt;
}
float getP(vec2 p) {
    float bt = max(
        rbox(p-vec2(.0,.075),oa,bz.xxww),
        -rbox(p-vec2(.0,.075),vec2(.1,.05),bz.zzww)
    );
    float bb = box(p+vec2(.125,0),vec2(.025,.175));
    return min(bt,bb);
}
float getQ(vec2 p) {
    float bt = max(
        rbox(p,vec2(.15,.175),vec4(.075,.11,.075,.075)),
        -rbox(p,vec2(.1,.125),vec4(.035,.065,.035,.035))
    );
    vec2 q = (p+vec2(-.0925,.115))*rot(.8);
    float bb = box(q,vec2(.025,.065));
    return min(bt,bb);
}
float getR(vec2 p) {
    float bt = max(
        rbox(p-vec2(.0,.075),oa,bz.xxww),
        -rbox(p-vec2(.0,.075),vec2(.1,.05),bz.zzww)
    );
    float bb = max(
        rbox(p+vec2(.0,.075),oa,bz.xwww),
        -rbox(p+vec2(.0,.12),vec2(.1,.095),bz.zwww)
    );
    return min(bt,bb);
}
float getS(vec2 p) {
    float bt = max(
        rbox(p-vec2(.0,.075),oa,bz.wwxx),
        -rbox(p-vec2(.075,.075),vec2(.175,.05),bz.wwzz)
    );
    bt = max(bt,-box(p-vec2(.085,.045),vec2(.08,.08)));
    float bb = max(
        rbox(p+vec2(.0,.075),oa,.........完整代码请登录后点击上方下载按钮下载查看