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222 lines
5.2 KiB
222 lines
5.2 KiB
<!DOCTYPE html>
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<html lang="en">
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<head>
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<title>three.js webgl - interactive - voxel painter</title>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
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<link type="text/css" rel="stylesheet" href="main.css">
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<style>
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body {
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background-color: #f0f0f0;
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color: #444;
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}
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a {
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color: #08f;
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}
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</style>
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</head>
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<body>
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<div id="info">
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<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - voxel painter - webgl<br>
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<strong>click</strong>: add voxel, <strong>shift + click</strong>: remove voxel
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</div>
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<!-- Import maps polyfill -->
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<!-- Remove this when import maps will be widely supported -->
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<script async src="https://unpkg.com/es-module-shims@1.3.6/dist/es-module-shims.js"></script>
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<script type="importmap">
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{
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"imports": {
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"three": "../build/three.module.js",
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"three/addons/": "./jsm/"
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}
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}
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</script>
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<script type="module">
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import * as THREE from 'three';
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let camera, scene, renderer;
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let plane;
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let pointer, raycaster, isShiftDown = false;
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let rollOverMesh, rollOverMaterial;
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let cubeGeo, cubeMaterial;
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const objects = [];
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init();
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render();
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function init() {
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camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 1, 10000 );
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camera.position.set( 500, 800, 1300 );
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camera.lookAt( 0, 0, 0 );
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scene = new THREE.Scene();
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scene.background = new THREE.Color( 0xf0f0f0 );
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// roll-over helpers
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const rollOverGeo = new THREE.BoxGeometry( 50, 50, 50 );
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rollOverMaterial = new THREE.MeshBasicMaterial( { color: 0xff0000, opacity: 0.5, transparent: true } );
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rollOverMesh = new THREE.Mesh( rollOverGeo, rollOverMaterial );
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scene.add( rollOverMesh );
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// cubes
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cubeGeo = new THREE.BoxGeometry( 50, 50, 50 );
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cubeMaterial = new THREE.MeshLambertMaterial( { color: 0xfeb74c, map: new THREE.TextureLoader().load( 'textures/square-outline-textured.png' ) } );
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// grid
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const gridHelper = new THREE.GridHelper( 1000, 20 );
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scene.add( gridHelper );
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//
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raycaster = new THREE.Raycaster();
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pointer = new THREE.Vector2();
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const geometry = new THREE.PlaneGeometry( 1000, 1000 );
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geometry.rotateX( - Math.PI / 2 );
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plane = new THREE.Mesh( geometry, new THREE.MeshBasicMaterial( { visible: false } ) );
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scene.add( plane );
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objects.push( plane );
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// lights
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const ambientLight = new THREE.AmbientLight( 0x606060 );
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scene.add( ambientLight );
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const directionalLight = new THREE.DirectionalLight( 0xffffff );
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directionalLight.position.set( 1, 0.75, 0.5 ).normalize();
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scene.add( directionalLight );
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renderer = new THREE.WebGLRenderer( { antialias: true } );
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renderer.setPixelRatio( window.devicePixelRatio );
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renderer.setSize( window.innerWidth, window.innerHeight );
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document.body.appendChild( renderer.domElement );
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document.addEventListener( 'pointermove', onPointerMove );
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document.addEventListener( 'pointerdown', onPointerDown );
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document.addEventListener( 'keydown', onDocumentKeyDown );
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document.addEventListener( 'keyup', onDocumentKeyUp );
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//
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window.addEventListener( 'resize', onWindowResize );
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}
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function onWindowResize() {
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camera.aspect = window.innerWidth / window.innerHeight;
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camera.updateProjectionMatrix();
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renderer.setSize( window.innerWidth, window.innerHeight );
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render();
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}
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function onPointerMove( event ) {
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pointer.set( ( event.clientX / window.innerWidth ) * 2 - 1, - ( event.clientY / window.innerHeight ) * 2 + 1 );
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raycaster.setFromCamera( pointer, camera );
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const intersects = raycaster.intersectObjects( objects, false );
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if ( intersects.length > 0 ) {
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const intersect = intersects[ 0 ];
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rollOverMesh.position.copy( intersect.point ).add( intersect.face.normal );
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rollOverMesh.position.divideScalar( 50 ).floor().multiplyScalar( 50 ).addScalar( 25 );
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render();
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}
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}
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function onPointerDown( event ) {
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pointer.set( ( event.clientX / window.innerWidth ) * 2 - 1, - ( event.clientY / window.innerHeight ) * 2 + 1 );
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raycaster.setFromCamera( pointer, camera );
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const intersects = raycaster.intersectObjects( objects, false );
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if ( intersects.length > 0 ) {
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const intersect = intersects[ 0 ];
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// delete cube
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if ( isShiftDown ) {
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if ( intersect.object !== plane ) {
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scene.remove( intersect.object );
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objects.splice( objects.indexOf( intersect.object ), 1 );
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}
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// create cube
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} else {
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const voxel = new THREE.Mesh( cubeGeo, cubeMaterial );
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voxel.position.copy( intersect.point ).add( intersect.face.normal );
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voxel.position.divideScalar( 50 ).floor().multiplyScalar( 50 ).addScalar( 25 );
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scene.add( voxel );
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objects.push( voxel );
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}
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render();
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}
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}
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function onDocumentKeyDown( event ) {
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switch ( event.keyCode ) {
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case 16: isShiftDown = true; break;
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}
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}
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function onDocumentKeyUp( event ) {
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switch ( event.keyCode ) {
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case 16: isShiftDown = false; break;
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}
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}
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function render() {
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renderer.render( scene, camera );
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}
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</script>
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</body>
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</html>
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