WebGL

Применение

Учебник Шейдеры Разбор создания шейдера Конкретный шейдер


void mainImage( out vec4 fragColor, in vec2 fragCoord )
{
    vec2 uv = fragCoord.xy / iResolution.x;
    
    float n = iTime * 0.15;
    
    float x = uv.x*(sin(uv.y+n*0.2)*1.);
    float y = uv.y*(sin(uv.x+n*0.2)*1.);
    
    float xp = uv.x-0.1+sin(x*3.+n-sin(y*1.+n));
    float yp = uv.y-0.5+sin(y*3.+n+sin(x*1.-n));
    
    float eh = ((sqrt(xp*xp+yp*yp)*1.+n));
    
    fragColor = vec4(sin(eh*0.1+(y+n*1.1)*5.-n*5.),sin(eh*0.8+(y+n)*5.-n*5.),sin(eh*0.2+(y+n*1.2)*5.-n*5.),1.0);
}

Конкретный шейдер2


void mainImage( out vec4 fragColor, in vec2 fragCoord )
{
    vec2 uv = fragCoord.xy / iResolution.x;
    
    float n = iTime * 0.15 + 0.5;
    
    float x = uv.x*(sin(uv.y+n*0.4)*1.);
    float y = uv.y*(sin(uv.x+n*0.4)*1.);
    
    float xp = uv.x-0.1+sin(x*3.+n-sin(y*1.+n));
    float yp = uv.y-0.5+sin(y*3.+n+sin(x*1.-n));
    
    float eh = ((sqrt(xp*xp+yp*yp) * 1.+n));
    
    float p = max(1., 2. * (1. - uv.x));
    
    float red = mix(sin(eh*1.1+(y+n*1.1)*5.-n*5.), 0., p);
    float green = mix(sin(eh*0.8+(y+n)*5.-n*5.), 0., p);
    float blue = mix(sin(eh*0.2+(y+n*1.2)*5.-n*5.), 0., p);
    
    fragColor = vec4(red, green, blue, 1.0);
}

Применение


<body>
    <div id="container"></div>
    <style>body{padding:0;margin:0;}</style>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/r128/three.min.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 float u_time;

        
        void main()
        {
            vec2 uv = gl_FragCoord.xy / u_resolution.x;
            
            float n = u_time * 0.15 + 0.5;
            
            float x = uv.x*(sin(uv.y+n*0.4)*1.);
            float y = uv.y*(sin(uv.x+n*0.4)*1.);
            
            float xp = uv.x-0.1+sin(x*3.+n-sin(y*1.+n));
            float yp = uv.y-0.5+sin(y*3.+n+sin(x*1.-n));
            
            float eh = ((sqrt(xp*xp+yp*yp) * 1.+n));
            
            float p = max(1., 2. * (1. - uv.x));
            
            float red = mix(sin(eh*1.1+(y+n*1.1)*5.-n*5.), 0., p);
            float green = mix(sin(eh*0.8+(y+n)*5.-n*5.), 0., p);
            float blue = mix(sin(eh*0.2+(y+n*1.2)*5.-n*5.), 0., p);
            
            gl_FragColor = vec4(red, green, blue, 1.0);
        }
    </script>
    <script>
        var container;
        var camera, scene, renderer, clock;
        var uniforms;

        init();
        animate();

        function init() {
            container = document.getElementById( 'container' );

            camera = new THREE.Camera();
            camera.position.z = 1;

            scene = new THREE.Scene();
            clock = new THREE.Clock();

            var geometry = new THREE.PlaneBufferGeometry( 2, 2 );

            uniforms = {
                u_time: { type: "f", value: 1.0 },
                u_resolution: { type: "v2", value: new THREE.Vector2() },
                u_mouse: { 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 );

            document.onmousemove = function(e){
              uniforms.u_mouse.value.x = e.pageX
              uniforms.u_mouse.value.y = e.pageY
            }
        }

        function onWindowResize( event ) {
            renderer.setSize( window.innerWidth, window.innerHeight );
            uniforms.u_resolution.value.x = renderer.domElement.width;
            uniforms.u_resolution.value.y = renderer.domElement.height;
        }

        function animate() {
            requestAnimationFrame( animate );
            render();
        }

        function render() {
            uniforms.u_time.value += clock.getDelta();
            renderer.render( scene, camera );
        }
    </script>
</body>

Пример работы