Html
<!DOCTYPE html>
<html lang="en">
<head>
<title>three.js webgl - interactive - voxel painter</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
<style>
body
{
background:#777;
padding:0;
margin:0;
font-weight: bold;
overflow:hidden;
}
#info
{
position: absolute;
top: 0px;
width: 100%;
padding: 5px;
font-family:Monospace;
font-size:13px;
text-align:center;
}
a
{
color: #ff0000;
}
</style>
</head>
<body>
<div id="info">
<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - voxel painter - webgl<br>
<strong>click</strong>: add voxel, <strong>shift + click</strong>: remove voxel
</div>
<!-- подключаем библиотеку three.js -->
<script src="https://dir.by/example_lib/tree_js/three.js"></script>
<!-- дополнительные библиотеки -->
<script src="https://dir.by/example_lib/tree_js/WebGL.js"></script>
<script>
if ( WEBGL.isWebGLAvailable() === false ) {
document.body.appendChild( WEBGL.getWebGLErrorMessage() );
}
var camera, scene, renderer;
var plane, cube;
var mouse, raycaster, isShiftDown = false;
var rollOverMesh, rollOverMaterial;
var cubeGeo, cubeMaterial;
var objects = [];
init();
render();
function init()
{
camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 1, 10000 );
camera.position.set( 500, 800, 1300 );
camera.lookAt( 0, 0, 0 );
scene = new THREE.Scene();
scene.background = new THREE.Color( 0xf0f0f0 );
// roll-over helpers
var rollOverGeo = new THREE.BoxBufferGeometry( 50, 50, 50 );
rollOverMaterial = new THREE.MeshBasicMaterial( { color: 0xff0000, opacity: 0.5, transparent: true } );
rollOverMesh = new THREE.Mesh( rollOverGeo, rollOverMaterial );
scene.add( rollOverMesh );
// cubes
cubeGeo = new THREE.BoxBufferGeometry( 50, 50, 50 );
cubeMaterial = new THREE.MeshLambertMaterial( { color: 0xfeb74c, map: new THREE.TextureLoader().load( 'https://dir.by/developer/three_js/example_paint_3d_cubes/textures/square-outline-textured.png' ) } );
// grid
var gridHelper = new THREE.GridHelper( 1000, 20 );
scene.add( gridHelper );
//
raycaster = new THREE.Raycaster();
mouse = new THREE.Vector2();
var geometry = new THREE.PlaneBufferGeometry( 1000, 1000 );
geometry.rotateX( - Math.PI / 2 );
plane = new THREE.Mesh( geometry, new THREE.MeshBasicMaterial( { visible: false } ) );
scene.add( plane );
objects.push( plane );
// lights
var ambientLight = new THREE.AmbientLight( 0x606060 );
scene.add( ambientLight );
var directionalLight = new THREE.DirectionalLight( 0xffffff );
directionalLight.position.set( 1, 0.75, 0.5 ).normalize();
scene.add( directionalLight );
renderer = new THREE.WebGLRenderer( { antialias: true } );
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( window.innerWidth, window.innerHeight );
document.body.appendChild( renderer.domElement );
document.addEventListener( 'mousemove', onDocumentMouseMove, false );
document.addEventListener( 'mousedown', onDocumentMouseDown, false );
document.addEventListener( 'keydown', onDocumentKeyDown, false );
document.addEventListener( 'keyup', onDocumentKeyUp, false );
window.addEventListener( 'resize', onWindowResize, false );
}
function onWindowResize()
{
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize( window.innerWidth, window.innerHeight );
}
function onDocumentMouseMove( event )
{
event.preventDefault();
mouse.set( ( event.clientX / window.innerWidth ) * 2 - 1, - ( event.clientY / window.innerHeight ) * 2 + 1 );
raycaster.setFromCamera( mouse, camera );
var intersects = raycaster.intersectObjects( objects );
if ( intersects.length > 0 )
{
var intersect = intersects[ 0 ];
rollOverMesh.position.copy( intersect.point ).add( intersect.face.normal );
rollOverMesh.position.divideScalar( 50 ).floor().multiplyScalar( 50 ).addScalar( 25 );
}
render();
}
function onDocumentMouseDown( event )
{
event.preventDefault();
mouse.set( ( event.clientX / window.innerWidth ) * 2 - 1, - ( event.clientY / window.innerHeight ) * 2 + 1 );
raycaster.setFromCamera( mouse, camera );
var intersects = raycaster.intersectObjects( objects );
if ( intersects.length > 0 )
{
var intersect = intersects[ 0 ];
// delete cube
if ( isShiftDown )
{
if ( intersect.object !== plane )
{
scene.remove( intersect.object );
objects.splice( objects.indexOf( intersect.object ), 1 );
}
}
else
{
// create cube
var voxel = new THREE.Mesh( cubeGeo, cubeMaterial );
voxel.position.copy( intersect.point ).add( intersect.face.normal );
voxel.position.divideScalar( 50 ).floor().multiplyScalar( 50 ).addScalar( 25 );
scene.add( voxel );
objects.push( voxel );
}
render();
}
}
function onDocumentKeyDown( event )
{
switch( event.keyCode )
{
case 16: isShiftDown = true; break;
}
}
function onDocumentKeyUp( event )
{
switch ( event.keyCode )
{
case 16: isShiftDown = false; break;
}
}
function render()
{
renderer.render( scene, camera );
}
</script>
</body>
</html>
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