用three打造黑暗空间穿梭动画效果

代码语言:html

所属分类:三维

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">

<title>Blackness, darkness, forever</title>
<style>
      body {
  margin: 0;
  padding: 0;
}

#container {
  position: fixed;
  touch-action: none;
}

    </style>

</head>
<body translate="no">
<script src="http://repo.bfw.wiki/bfwrepo/js/three.js"></script>
<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">
  uniform vec2 u_resolution;
  uniform vec2 u_mouse;
  uniform float u_time;
  uniform sampler2D u_noise;

// Hash function. This particular one probably doesn't disperse things quite 
// as nicely as some of the others around, but it's compact, and seems to work.
//
vec3 hash33(vec3 p){ 
    float n = sin(dot(p, vec3(7, 157, 113)));    
    return fract(vec3(2097152, 262144, 32768)*n); 
}

float pn( in vec3 p ){
    
    vec3 i = floor(p); p -= i; p *= p*(3. - 2.*p);
	p.xy = texture2D(u_noise, (p.xy + i.xy + vec2(37, 17)*i.z + .5)/256., -100.).yx;
	return mix(p.x, p.y, p.z);
}

float trigNoise3D(in vec3 p){

    
    float res = 0., sum = 0.;
    
    float n = pn(p*8. + u_time*2.);

    vec3 t = sin(p.yzx*3.14159265 + cos(p.zxy*3.14159265+1.57/2.))*0.5 + 0.5;
    p = p*1.5 + (t - 1.5); //  + u_time*0.1
    res += (dot(t, vec3(0.333)));

    t = sin(p.yzx*3.14159265 + cos(p.zxy*3.14159265+1.57/2.))*0.5 + 0.5;
    res += (dot(t, vec3(0.333)))*0.7071;    
	 
	return ((res/1.7071))*0.85 + n*0.15;
}

// Distance function.
float map(vec3 p) {
  float n = trigNoise3D(p*0.2);
    float t = sin(u_time*.0001)*.5+.5;
    float c = cos(p.z*.05*t+n);
    float s = sin(p.z*.05+n*.5);
    p.xy *= mat2(c, -s, s, c);
    p -= n*1.5;
    p.y = mod(p.y, 4.0) - 2.;
    return abs(p.y) - .1;

    return trigNoise3D(p*0.5);
    
}



void mainImage( out vec4 fragColor, in vec2 fragCoord )
{  

    vec3 rd = normalize(vec3(fragCoord - u_resolution.xy*.5, u_resolution.y*.75)); 

    // Ray origin. Moving along the Z-axis.
    vec3 ro = vec3(0, 0, u_time*10.);

    vec3 lp = vec3( 0, -.5, 5);
    lp += ro;

    rd = (rd + (hash33(rd.zyx)*.006 - .003)); 
    rd *= (1. + fract(sin(dot(vec3(7, 157, 113), rd.zyx))*43758.5453)*0.06-0.03);      

    float lDe = 0., td = 0., w = 0.;

    float d = 1., t = 0.;
 
    const float h = .5;

    vec3 col = vec3(0), sp;



    vec3 sn = normalize(vec3(-1));

    // Raymarching loop.
    for (int i=0; i<64; i++) {

        if((td>1.) || d<.001*t || t>80.)break;


        sp = ro + rd*t; // Current ray position.
        d = map(sp); // Closest distance to the surface... particle.

        lDe = (h - d)*step(d, h); 
        w = (1. - td)*lDe;
 
        td += w*(1.-h)*1./abs(d); //w*w*5. + 1./50.;
      
        // Point light calculations.
        vec3 ld = lp-sp; // Direction vector from the surface to the light position.
        float lDist = max(length(ld), .001); // Distance from the surface to the light.
        ld/=lDist; // Normalizing the directional light vector.

        // Using the light distance to perform some falloff.
        float atten = 1./(lDist);

        float diff = max(dot( sn, ld ), 0.);.........完整代码请登录后点击上方下载按钮下载查看

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