<body>
<div id="container"></div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/89/three.min.js"></script>
<script id="vertexShader" type="x-shader/x-vertex">
void main() {
gl_Position = vec4( position, 1.0 );
}
</script>
<!-- 参考 http://glslsandbox.com/e#58290.6 -->
<script id="fragmentShader" type="x-shader/x-fragment">
// global remix - Del 30/10/2019
#ifdef GL_ES
precision highp float;
#endif
#extension GL_OES_standard_derivatives : enable
uniform float time;
uniform vec2 mouse;
uniform vec2 resolution;
float snow(vec2 uv,float scale)
{
float _t = time*0.3;
uv.x+=_t/scale;
uv*=scale;
vec2 s=floor(uv);
vec2 f=fract(uv);
vec2 p;
float k=40.;
float d;
p=sin(11.*fract(sin((s+p+scale)*mat2(7,3,6,5))*5.))-f;
d=length(p);
k=min(d,k);
k=smoothstep(0.,k,sin(f.x+f.y)*0.003); // particleの大きさ
return k;
}
void main(void){
vec2 uv=(gl_FragCoord.xy*2.-resolution.xy)/min(resolution.x,resolution.y);
// uv.x += sin(time*0.001);
//uv.y += sin(uv.x*1.4)*0.2;
// uv.x *= 0.005;
float c=0.0;
c+=snow(uv,5.);
c+=snow(uv,10.);
c+=snow(uv,20.);
c+=snow(uv,30.);
c+=snow(uv,40.);
vec3 finalColor=(vec3(0.9,0.8,0.99))*c*30.0;
gl_FragColor = vec4(finalColor,1);
}
</script>
</body>
*{
padding: 0;
margin: 0;
}
var container;
var camera, scene, renderer;
var uniforms;
init();
animate();
function init() {
container = document.getElementById( 'container' );
camera = new THREE.Camera();
camera.position.z = 1;
scene = new THREE.Scene();
var geometry = new THREE.PlaneBufferGeometry( 2, 2 );
uniforms = {
time: { type: "f", value: 1.0 },
resolution: { type: "v2", value: new THREE.Vector2() }
};
var material = new THREE.ShaderMaterial( {
uniforms: uniforms,
vertexShader: document.getElementById( 'vertexShader' ).textContent,
fragmentShader: document.getElementById( 'fragmentShader' ).textContent
} );
var mesh = new THREE.Mesh( geometry, material );
scene.add( mesh );
renderer = new THREE.WebGLRenderer();
renderer.setPixelRatio( window.devicePixelRatio );
container.appendChild( renderer.domElement );
onWindowResize();
window.addEventListener( 'resize', onWindowResize, false );
}
function onWindowResize( event ) {
renderer.setSize( window.innerWidth, window.innerHeight );
uniforms.resolution.value.x = renderer.domElement.width;
uniforms.resolution.value.y = renderer.domElement.height;
}
function animate() {
requestAnimationFrame( animate );
render();
}
function render() {
uniforms.time.value += 0.05;
renderer.render( scene, camera );
}
This Pen doesn't use any external CSS resources.
This Pen doesn't use any external JavaScript resources.