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CSS

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HTML
!

CSS 

              
                html, body, canvas {
  margin: 0;
  width: 100%;
  height: 100%;
  display: block;
  position: absolute;
  top: 0;
  left: 0;
}
!

JS 

              
                // forked from Griffin Moyer; variances and camera rotation by me

// to keep the presentation clean. check out Griffin's work at https://codepen.io/gmoyer
document.addEventListener('DOMContentLoaded', function() {
    document.querySelector('#gm-signature').setAttribute('style','display: none;');
});

// ----------------------------------------------------------------------------

import * as THREE from "https://esm.sh/three";
import TWEEN from "https://cdn.skypack.dev/@tweenjs/tween.js@18.6.4";

// in seconds
const minDelay = 5;
const maxDelay = 10;
const minRotationDelay = 3;
const maxRotationDelay = 6; 

const randomizeSpeed = true;
const randomizeSpacing = true;
const randomizeSize = true;
const gridSize = 1100; // in pixels

const scene = new THREE.Scene();
const hexColor = 0x6699ff;

function getRandomInRange(min, max) {
    return Math.random() * (max - min) + min;
}

function getInitialView() {
    const isTopDown = Math.random() > 0.5; // 50% chance to be a top-down view
    return {
        speed: getRandomInRange(10, 30),
        spacing: getRandomInRange(1.25, 6.25),
        size: getRandomInRange(1.5, 3.5),
        position: {
            x: getRandomInRange(-500, 500),
            y: getRandomInRange(150, 500),
            z: getRandomInRange(250, 500)
        },
        lookAt: {
            x: 0,
            y: 0,
            z: 0
        },
        fov: isTopDown ? getRandomInRange(13, 17) : getRandomInRange(45, 75),
        far: isTopDown ? getRandomInRange(600, 1000) : getRandomInRange(700, 1000),
        rotation: {
            x: getRandomInRange(0, 2 * Math.PI),
            y: getRandomInRange(0, 2 * Math.PI),
            z: getRandomInRange(0, 2 * Math.PI)
        }
    };
}

let currentView = getInitialView();

function getRandomView() {
    const isTopDown = Math.random() > 0.5; // 50% chance to be a top-down view
    return {
        speed: randomizeSpeed ? getRandomInRange(10, 30) : currentView.speed,
        spacing: randomizeSpacing ? getRandomInRange(1.25, 6.25) : currentView.spacing,
        size: randomizeSize ? getRandomInRange(0.5, 1.5) : currentView.size,
        position: {
            x: getRandomInRange(-500, 500),
            y: getRandomInRange(150, 500),
            z: getRandomInRange(-500, 500)
        },
        lookAt: {
            x: 0,
            y: 0,
            z: 0
        },
        fov: isTopDown ? getRandomInRange(13, 17) : getRandomInRange(45, 75),
        far: isTopDown ? getRandomInRange(600, 1000) : getRandomInRange(700, 1000),
        rotation: {
            x: getRandomInRange(0, 2 * Math.PI),
            y: getRandomInRange(0, 2 * Math.PI),
            z: getRandomInRange(0, 2 * Math.PI)
        }
    };
}

let camera = new THREE.PerspectiveCamera(currentView.fov, window.innerWidth / window.innerHeight, 0.1, currentView.far);

function setView(view) {
    camera.position.set(view.position.x, view.position.y, view.position.z);
    camera.lookAt(view.lookAt.x, view.lookAt.y, view.lookAt.z);
    camera.fov = view.fov;
    camera.far = view.far;
    camera.rotation.set(view.rotation.x, view.rotation.y, view.rotation.z);
    camera.updateProjectionMatrix();
}

function transitionView() {
    let nextView = getRandomView();

    new TWEEN.Tween(camera.position)
        .to({
            x: nextView.position.x,
            y: nextView.position.y,
            z: nextView.position.z
        }, 2000)
        .easing(TWEEN.Easing.Quadratic.InOut)
        .start();

    new TWEEN.Tween(camera.rotation)
        .to({
            x: nextView.rotation.x,
            y: nextView.rotation.y,
            z: nextView.rotation.z
        }, 2000)
        .easing(TWEEN.Easing.Quadratic.InOut)
        .onUpdate(() => {
            camera.lookAt(new THREE.Vector3(nextView.lookAt.x, nextView.lookAt.y, nextView.lookAt.z));
        })
        .start();

    new TWEEN.Tween({ fov: camera.fov })
        .to({ fov: nextView.fov }, 2000)
        .easing(TWEEN.Easing.Quadratic.InOut)
        .onUpdate(function (object) {
            camera.fov = object.fov;
            camera.updateProjectionMatrix();
        })
        .start();

    new TWEEN.Tween({ far: camera.far })
        .to({ far: nextView.far }, 2000)
        .easing(TWEEN.Easing.Quadratic.InOut)
        .onUpdate(function (object) {
            camera.far = object.far;
            camera.updateProjectionMatrix();
        })
        .start();

    currentView = nextView;

    setTimeout(transitionView, getRandomInRange(minDelay, maxDelay) * 1000); // Set next transition
}

setView(currentView);
setTimeout(transitionView, getRandomInRange(minRotationDelay, maxRotationDelay) * 1000); // Initial random delay

function update() {
    TWEEN.update();
}

// Existing code
let renderer = new THREE.WebGLRenderer();
renderer.setSize(window.innerWidth, window.innerHeight);
document.body.appendChild(renderer.domElement);

addNote();

function randint(min, max) {
    return Math.floor(Math.random() * (max - min + 1)) + min;
}

function RGB(red, green, blue) {
    function colorcheck(color) {
        if (color > 255) color = 255;
        if (color < 0) color = 0;
        return color;
    }
    red = colorcheck(red);
    green = colorcheck(green);
    blue = colorcheck(blue);

    return 'rgb(' + red + ',' + green + ',' + blue + ')';
}

function rgb2hex(redGreenBlue) {
    redGreenBlue = redGreenBlue.match(/^rgba?[\s+]?\([\s+]?(\d+)[\s+]?,[\s+]?(\d+)[\s+]?,[\s+]?(\d+)[\s+]?/i);

    return (redGreenBlue && redGreenBlue.length === 4) ? "0x" +
        ("0" + parseInt(redGreenBlue[1], 10).toString(16)).slice(-2) +
        ("0" + parseInt(redGreenBlue[2], 10).toString(16)).slice(-2) +
        ("0" + parseInt(redGreenBlue[3], 10).toString(16)).slice(-2) : '';
}

function rgb2color(r, g, b) {
    return rgb2hex(RGB(r, g, b));
}

let color = {};
color.red = 0;
color.green = 0;
color.blue = 255;
color.redStep = 0;
color.greenStep = 0;
color.blueStep = 0;
color.redTarget = 0;
color.greenTarget = 0;
color.blueTarget = 255;

// Create elements here:
const simplex = new SimplexNoise();

function smoothNoise(x, z) {
    // Calculate the contribution of the corners
    let cornerNoise = (
        simplex.noise2D(x - 1, z - 1) +
        simplex.noise2D(x + 1, z - 1) +
        simplex.noise2D(x - 1, z + 1) +
        simplex.noise2D(x + 1, z + 1)
    ) / 16;

    // Calculate the contribution of the sides
    let sideNoise = (
        simplex.noise2D(x - 1, z) +
        simplex.noise2D(x + 1, z) +
        simplex.noise2D(x, z - 1) +
        simplex.noise2D(x, z + 1)
    ) / 8;

    // Calculate the contribution of the center
    let centerNoise = simplex.noise2D(x, z) / 4;

    // Combine the contributions to get the final smooth noise value
    return cornerNoise + sideNoise + centerNoise;
}

function noise(x, z) {
  return smoothNoise(x / 100, z / 100) * 10; // Adjusted scaling factors
}

let size = gridSize,
    grid = new THREE.BufferGeometry(),
    positions = [],
    gMaterial = new THREE.PointsMaterial({
        color: hexColor,
        size: currentView.size
    });

// now create the individual particles
for (let x = 0; x < size; x += currentView.spacing) {
    for (let z = 0; z < size; z += currentView.spacing) {
        positions.push(x, 0, z);
    }
}

// Add positions to the geometry
grid.setAttribute('position', new THREE.Float32BufferAttribute(positions, 3));

// create the particle system
let gridSystem = new THREE.Points(grid, gMaterial);

// add it to the scene
scene.add(gridSystem);
gridSystem.position.x = -size / 2;
gridSystem.position.z = -900;

//end of elements
camera.position.y = 175;
camera.position.z = 250;
camera.lookAt(new THREE.Vector3(0, 0, 0));

let render = function () {
    requestAnimationFrame(render);
    mainloop();
    renderer.render(scene, camera);
};

let time = 0;

function mainloop() {
    time += currentView.speed;

    if (Math.abs(color.red - color.redTarget) >= 5) color.red += color.redStep;
    if (Math.abs(color.green - color.greenTarget) >= 5) color.green += color.greenStep;
    if (Math.abs(color.blue - color.blueTarget) >= 5) color.blue += color.blueStep;

    if (Math.abs(color.red - color.redTarget) < 5 &&
        Math.abs(color.green - color.greenTarget) < 5 &&
        Math.abs(color.blue - color.blueTarget) < 5) {
        color.redTarget = randint(0, 255);
        color.greenTarget = randint(0, 255);
        color.blueTarget = randint(0, 255);
        const divisor = 50;

        color.redStep = (color.redTarget > color.red) ? randint(5, 45) / divisor : -randint(5, 45) / divisor;
        color.greenStep = (color.greenTarget > color.green) ? randint(5, 45) / divisor : -randint(5, 45) / divisor;
        color.blueStep = (color.blueTarget > color.blue) ? randint(5, 45) / divisor : -randint(5, 45) / divisor;
    }

    let red = Math.round(color.red);
    let green = Math.round(color.green);
    let blue = Math.round(color.blue);

    const positions = grid.attributes.position.array;
    
    for (let i = 0; i < positions.length; i += 3) {
        positions[i + 1] = noise(positions[i] + (time / 20), positions[i + 2] + (time / 10));
    }
    
    grid.attributes.position.needsUpdate = true;
    gridSystem.material.color.setHex(rgb2color(red, green, blue));

    update(); // Update camera animation
}

render();

window.addEventListener('resize', onWindowResize, false);

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

    renderer.setSize(window.innerWidth, window.innerHeight);
}
!
999px

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