shader_icosahedron.js

// Ensure ThreeJS is in global scope for the 'examples/'
global.THREE = require("three");

// Include any additional ThreeJS examples below
require("three/examples/js/controls/OrbitControls");

const canvasSketch = require("canvas-sketch");
const glsl = require("glslify");

const settings = {
  // Make the loop animated
  animate: true,
  // Get a WebGL canvas rather than 2D
  context: "webgl"
};

const sketch = ({ context }) => {
  // Create a renderer
  const renderer = new THREE.WebGLRenderer({
    canvas: context.canvas
  });

  // WebGL background color
  renderer.setClearColor("#fff", 1);

  // Setup a camera
  const camera = new THREE.PerspectiveCamera(50, 1, 0.01, 100);
  camera.position.set(0, 0, -4);
  camera.lookAt(new THREE.Vector3());

  // Setup camera controller
  const controls = new THREE.OrbitControls(camera, context.canvas);

  // Setup your scene
  const scene = new THREE.Scene();

  // Setup a geometry
  const geometry = new THREE.SphereGeometry(1, 32, 16);

  const baseGeom = new THREE.IcosahedronGeometry(1, 1);
  const points = baseGeom.vertices;
  console.log(points);

  const circleGeom = new THREE.CircleGeometry(1, 32);

  points.forEach(point => {
    const mesh = new THREE.Mesh(
      circleGeom, new THREE.MeshBasicMaterial({
        color: "black",
        side: THREE.BackSide
      })
    );
    mesh.position.copy(point);
    // mesh.position.copy(point).multiplyScalar(1.5);
    mesh.scale.setScalar(0.25 * Math.random());
    mesh.lookAt(new THREE.Vector3());
    scene.add(mesh);
  });

  const vertexShader = /* glsl */ `
    varying vec2 vUv;
    void main() {
      vUv = uv;
      gl_Position = projectionMatrix * modelViewMatrix * vec4(position.xyz, 1.0);
    }
  `;

  const fragmentShader =  glsl(/* glsl */`
    #pragma glslify: noise = require('glsl-noise/simplex/3d')
    varying vec2 vUv;
    uniform vec3 color;
    uniform float time;
    void main () {
      gl_FragColor = vec4(vec3(color), 1.0);

    }
  `);

  // Setup a material
  const material = new THREE.ShaderMaterial({
    uniforms: {
      time: { value: 0 },
      color: { value: new THREE.Color("tomato") }
    },
    vertexShader,
    fragmentShader
  });

  // Setup a mesh with geometry + material
  const mesh = new THREE.Mesh(geometry, material);
  scene.add(mesh);

  // draw each frame
  return {
    // Handle resize events here
    resize({ pixelRatio, viewportWidth, viewportHeight }) {
      renderer.setPixelRatio(pixelRatio);
      renderer.setSize(viewportWidth, viewportHeight, false);
      camera.aspect = viewportWidth / viewportHeight;
      camera.updateProjectionMatrix();
    },
    // Update & render your scene here
    render({ time }) {
      material.uniforms.time.value = time;
      controls.update();
      renderer.render(scene, camera);
    },
    // Dispose of events & renderer for cleaner hot-reloading
    unload() {
      controls.dispose();
      renderer.dispose();
    }
  };
};

canvasSketch(sketch, settings);