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webgl_paint3d.html
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<!DOCTYPE html>
<html lang="en">
<head>
<title>Paint 3D</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="https://threejs.org/examples/main.css">
<style>
body {
background-color: #f0f0f0;
color: #444;
}
a {
color: #08f;
}
#blocker {
position: absolute;
width: 100%;
height: 100%;
background-color: rgba(0, 0, 0, 0.5);
}
#instructions {
width: 100%;
height: 100%;
display: -webkit-box;
display: -moz-box;
display: box;
-webkit-box-orient: horizontal;
-moz-box-orient: horizontal;
box-orient: horizontal;
-webkit-box-pack: center;
-moz-box-pack: center;
box-pack: center;
-webkit-box-align: center;
-moz-box-align: center;
box-align: center;
color: #ffffff;
text-align: center;
font-family: Arial;
font-size: 14px;
line-height: 24px;
cursor: pointer;
}
</style>
</head>
<body>
<div id="info">
<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> webgl - paint 3D
</div>
<div id="blocker">
<div id="instructions">
<span style="font-size:36px">Press F to unlock movement</span>
<br /><br />
Move: WASD<br />
Up: SPACE<br />
Down: SHIFT<br />
Look: MOUSE<br />
Lock movement: ESC
</div>
</div>
<script type="module">
import * as THREE from 'https://threejs.org/build/three.module.js';
import Stats from 'https://threejs.org/examples/jsm/libs/stats.module.js';
import { PointerLockControls } from './PointerLockControls.js';
import { GUI } from 'https://threejs.org/examples/jsm/libs/dat.gui.module.js'
let container, stats;
let camera, controls, scene, raycaster, renderer;
let brushColor = 0x000000;
let CLICKED = false;
let INTERSECTED;
const center = new THREE.Vector2();
center.x = 0;
center.y = 0,5;
let moveForward = false;
let moveBackward = false;
let moveLeft = false;
let moveRight = false;
let moveUp = false;
let moveDown = false;
let prevTime = performance.now();
let time;
const velocity = new THREE.Vector3();
const direction = new THREE.Vector3();
init();
animate();
function init() {
container = document.createElement('div');
document.body.appendChild(container);
camera = new THREE.PerspectiveCamera(70, window.innerWidth / window.innerHeight, 1, 10000);
camera.position.z = 500;
scene = new THREE.Scene();
scene.background = new THREE.Color(0xf0f0f0);
const light = new THREE.AmbientLight(0xffffff);
light.position.set(1, 1, 1).normalize();
scene.add(light);
const geometry = new THREE.BoxGeometry(20, 20, 20);
let x = 0;
let y = 0;
let z = 0;
for (let i = 0; i < 1000; i++) { // 10^3
const object = new THREE.Mesh(geometry, new THREE.MeshLambertMaterial({
color: 0xffffff,
opacity: 0,
transparent: true
}));
object.position.x = x;
object.position.y = y;
object.position.z = z;
scene.add(object);
x += 20;
if (x == 200) {
x = 0;
y += 20;
if (y == 200) {
y = 0;
z += 20;
}
}
}
raycaster = new THREE.Raycaster();
renderer = new THREE.WebGLRenderer();
renderer.setPixelRatio(window.devicePixelRatio);
renderer.setSize(window.innerWidth, window.innerHeight);
container.appendChild(renderer.domElement);
stats = new Stats();
container.appendChild(stats.dom);
//
const gui = new GUI();
let parameters = { color: '#000000' };
gui.addColor(parameters, 'color').onChange(function (colorValue) {
brushColor = colorValue.replace("#", "0x");
});
//
controls = new PointerLockControls(camera, document.body);
const blocker = document.getElementById('blocker');
const instructions = document.getElementById('instructions');
controls.addEventListener('lock', function () {
instructions.style.display = 'none';
blocker.style.display = 'none';
});
controls.addEventListener('unlock', function () {
blocker.style.display = 'block';
instructions.style.display = '';
});
scene.add(controls.getObject());
const onKeyDown = function (event) {
switch (event.keyCode) {
case 87: // W
moveForward = true;
break;
case 65: // A
moveLeft = true;
break;
case 83: // S
moveBackward = true;
break;
case 68: // D
moveRight = true;
break;
case 32: // SPACE
moveUp = true;
break;
case 16: // SHIFT
moveDown = true;
break;
case 70: // F
controls.lock();
break;
}
};
const onKeyUp = function (event) {
switch (event.keyCode) {
case 87: // W
moveForward = false;
break;
case 65: // A
moveLeft = false;
break;
case 83: // S
moveBackward = false;
break;
case 68: // D
moveRight = false;
break;
case 32: // SPACE
moveUp = false;
break;
case 16: // SHIFT
moveDown = false;
break;
}
};
document.addEventListener('keydown', onKeyDown);
document.addEventListener('keyup', onKeyUp);
//
document.addEventListener("mousedown", onDocumentMouseDown);
document.addEventListener("mouseup", onDocumentMouseUp);
//
window.addEventListener('resize', onWindowResize);
}
function onWindowResize() {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize(window.innerWidth, window.innerHeight);
}
function onDocumentMouseDown() {
CLICKED = true;
}
function onDocumentMouseUp() {
CLICKED = false;
}
//
function animate() {
requestAnimationFrame(animate);
time = performance.now();
if (controls.isLocked === true) {
const delta = (time - prevTime) / 1000;
velocity.x -= velocity.x * 10.0 * delta;
velocity.y -= velocity.y * 10.0 * delta;
velocity.z -= velocity.z * 10.0 * delta;
direction.x = Number(moveRight) - Number(moveLeft);
direction.y = Number(moveUp) - Number(moveDown);
direction.z = Number(moveForward) - Number(moveBackward);
direction.normalize(); // this ensures consistent movements in all directions
if (moveLeft || moveRight) velocity.x -= direction.x * 2000.0 * delta;
if (moveUp || moveDown) velocity.y -= direction.y * 2000.0 * delta;
if (moveForward || moveBackward) velocity.z -= direction.z * 2000.0 * delta;
controls.moveRight(- velocity.x * delta);
controls.moveUp(- velocity.y * delta);
controls.moveForward(- velocity.z * delta);
}
render();
stats.update();
}
function render() {
raycaster.setFromCamera(center, camera);
const intersects = raycaster.intersectObjects(scene.children);
if (intersects.length > 0) {
if (INTERSECTED != intersects[0].object) {
// Eraser
if (INTERSECTED && !CLICKED) {
INTERSECTED.material.opacity = 0;
}
INTERSECTED = intersects[0].object;
INTERSECTED.material.color.setHex(brushColor);
INTERSECTED.material.opacity = 1;
}
} else {
// Eraser
if (INTERSECTED && !CLICKED) {
INTERSECTED.material.opacity = 0;
}
INTERSECTED = null;
}
prevTime = time;
renderer.render(scene, camera);
}
</script>
</body>
</html>