verge3d-code-examples/webgl_custom_attributes.html at master · Soft8Soft/verge3d-code-examples · GitHub

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<!DOCTYPE html>
<html lang="en">
  <head>
    <title>Verge3D webgl - custom attributes</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
    <link type="text/css" rel="stylesheet" href="main.css">
  </head>

  <body>
    <div id="info"><a href="https://www.soft8soft.com/verge3d" target="_blank" rel="noopener">Verge3D</a> - custom attributes example</div>
    <div id="container"></div>

    <script type="x-shader/x-vertex" id="vertexshader">

      uniform float amplitude;

      attribute float displacement;

      varying vec3 vNormal;
      varying vec2 vUv;

      void main() {

        vNormal = normal;
        vUv = (0.5 + amplitude) * uv + vec2(amplitude);

        vec3 newPosition = position + amplitude * normal * vec3(displacement);
        gl_Position = projectionMatrix * modelViewMatrix * vec4(newPosition, 1.0);

      }

    </script>

    <script type="x-shader/x-fragment" id="fragmentshader">

      varying vec3 vNormal;
      varying vec2 vUv;

      uniform vec3 color;
      uniform sampler2D colorTexture;

      void main() {

        vec3 light = vec3(0.5, 0.2, 1.0);
        light = normalize(light);

        float dProd = dot(vNormal, light) * 0.5 + 0.5;

        vec4 tcolor = texture2D(colorTexture, vUv);
        vec4 gray = vec4(vec3(tcolor.r * 0.3 + tcolor.g * 0.59 + tcolor.b * 0.11), 1.0);

        gl_FragColor = gray * vec4(vec3(dProd) * vec3(color), 1.0);

      }

    </script>

    <!-- Import maps polyfill -->
    <!-- Remove this when import maps will be widely supported -->
    <script async src="https://unpkg.com/es-module-shims@1.3.6/dist/es-module-shims.js"></script>

    <script type="importmap">
      {
        "imports": {
          "v3d": "../build/v3d.module.js",
          "v3d/addons/": "./jsm/"
        }
      }
    </script>

    <script type="module">

      import * as v3d from 'v3d';

      import Stats from 'v3d/addons/libs/stats.module.js';

      let renderer, scene, camera, stats;

      let sphere, uniforms;

      let displacement, noise;

      init();
      animate();

      function init() {

        camera = new v3d.PerspectiveCamera(30, window.innerWidth / window.innerHeight, 1, 10000);
        camera.position.z = 300;

        scene = new v3d.Scene();
        scene.background = new v3d.Color(0x050505);

        uniforms = {

          'amplitude': { value: 1.0 },
          'color': { value: new v3d.Color(0xff2200) },
          'colorTexture': { value: new v3d.TextureLoader().load('textures/water.jpg') }

        };

        uniforms['colorTexture'].value.wrapS = uniforms['colorTexture'].value.wrapT = v3d.RepeatWrapping;

        const shaderMaterial = new v3d.ShaderMaterial({

          uniforms: uniforms,
          vertexShader: document.getElementById('vertexshader').textContent,
          fragmentShader: document.getElementById('fragmentshader').textContent

        });


        const radius = 50, segments = 128, rings = 64;

        const geometry = new v3d.SphereGeometry(radius, segments, rings);

        displacement = new Float32Array(geometry.attributes.position.count);
        noise = new Float32Array(geometry.attributes.position.count);

        for (let i = 0; i < displacement.length; i++) {

          noise[i] = Math.random() * 5;

        }

        geometry.setAttribute('displacement', new v3d.BufferAttribute(displacement, 1));

        sphere = new v3d.Mesh(geometry, shaderMaterial);
        scene.add(sphere);

        renderer = new v3d.WebGLRenderer();
        renderer.setPixelRatio(window.devicePixelRatio);
        renderer.setSize(window.innerWidth, window.innerHeight);

        const container = document.getElementById('container');
        container.appendChild(renderer.domElement);

        stats = new Stats();
        container.appendChild(stats.dom);

        //

        window.addEventListener('resize', onWindowResize);

      }

      function onWindowResize() {

        camera.aspect = window.innerWidth / window.innerHeight;
        camera.updateProjectionMatrix();

        renderer.setSize(window.innerWidth, window.innerHeight);

      }

      function animate() {

        requestAnimationFrame(animate);

        render();
        stats.update();

      }

      function render() {

        const time = Date.now() * 0.01;

        sphere.rotation.y = sphere.rotation.z = 0.01 * time;

        uniforms['amplitude'].value = 2.5 * Math.sin(sphere.rotation.y * 0.125);
        uniforms['color'].value.offsetHSL(0.0005, 0, 0);

        for (let i = 0; i < displacement.length; i++) {

          displacement[i] = Math.sin(0.1 * i + time);

          noise[i] += 0.5 * (0.5 - Math.random());
          noise[i] = v3d.MathUtils.clamp(noise[i], -5, 5);

          displacement[i] += noise[i];

        }

        sphere.geometry.attributes.displacement.needsUpdate = true;

        renderer.render(scene, camera);

      }


    </script>

</body>

</html>