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canvas_interactive_voxelpainter.html
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<!doctype html>
<html lang="en">
<head>
<title>three.js canvas - 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 {
font-family: Monospace;
background-color: #f0f0f0;
margin: 0px;
overflow: hidden;
}
</style>
</head>
<body>
<script src="../build/Three.js"></script>
<script src="js/Stats.js"></script>
<script>
var container, stats;
var camera, scene, renderer;
var projector, plane;
var mouse2D, mouse3D, ray,
rollOveredFace, isShiftDown = false,
theta = 45, isCtrlDown = false,
target = new THREE.Vector3( 0, 200, 0 );
init();
animate();
function init() {
container = document.createElement( 'div' );
document.body.appendChild( container );
var info = document.createElement( 'div' );
info.style.position = 'absolute';
info.style.top = '10px';
info.style.width = '100%';
info.style.textAlign = 'center';
info.innerHTML = '<a href="http://github.com/mrdoob/three.js" target="_blank">three.js</a> - voxel painter<br><strong>click</strong>: add voxel, <strong>control + click</strong>: remove voxel, <strong>shift</strong>: rotate, <a href="javascript:save();return false;">save .png</a>';
container.appendChild( info );
camera = new THREE.PerspectiveCamera( 40, window.innerWidth / window.innerHeight, 1, 10000 );
camera.position.y = 800;
scene = new THREE.Scene();
scene.add( camera );
// Grid
var geometry = new THREE.Geometry();
geometry.vertices.push( new THREE.Vector3( - 500, 0, 0 ) );
geometry.vertices.push( new THREE.Vector3( 500, 0, 0 ) );
var material = new THREE.LineBasicMaterial( { color: 0x000000, opacity: 0.2 } );
for ( var i = 0; i <= 20; i ++ ) {
var line = new THREE.Line( geometry, material );
line.position.z = ( i * 50 ) - 500;
scene.add( line );
var line = new THREE.Line( geometry, material );
line.position.x = ( i * 50 ) - 500;
line.rotation.y = 90 * Math.PI / 180;
scene.add( line );
}
projector = new THREE.Projector();
plane = new THREE.Mesh( new THREE.PlaneGeometry( 1000, 1000 ), new THREE.MeshFaceMaterial() );
scene.add( plane );
mouse2D = new THREE.Vector3( 0, 10000, 0.5 );
ray = new THREE.Ray( camera.position, null );
// Lights
var ambientLight = new THREE.AmbientLight( 0x606060 );
scene.add( ambientLight );
var directionalLight = new THREE.DirectionalLight( 0xffffff );
directionalLight.position.x = Math.random() - 0.5;
directionalLight.position.y = Math.random() - 0.5;
directionalLight.position.z = Math.random() - 0.5;
directionalLight.position.normalize();
scene.add( directionalLight );
var directionalLight = new THREE.DirectionalLight( 0x808080 );
directionalLight.position.x = Math.random() - 0.5;
directionalLight.position.y = Math.random() - 0.5;
directionalLight.position.z = Math.random() - 0.5;
directionalLight.position.normalize();
scene.add( directionalLight );
renderer = new THREE.CanvasRenderer();
renderer.setSize( window.innerWidth, window.innerHeight );
container.appendChild(renderer.domElement);
stats = new Stats();
stats.domElement.style.position = 'absolute';
stats.domElement.style.top = '0px';
container.appendChild( stats.domElement );
document.addEventListener( 'mousemove', onDocumentMouseMove, false );
document.addEventListener( 'mousedown', onDocumentMouseDown, false );
document.addEventListener( 'keydown', onDocumentKeyDown, false );
document.addEventListener( 'keyup', onDocumentKeyUp, false );
}
function onDocumentMouseMove( event ) {
event.preventDefault();
mouse2D.x = ( event.clientX / window.innerWidth ) * 2 - 1;
mouse2D.y = - ( event.clientY / window.innerHeight ) * 2 + 1;
}
function onDocumentMouseDown( event ) {
event.preventDefault();
var intersects = ray.intersectObjects( scene.children );
if ( intersects.length > 0 ) {
if ( isCtrlDown ) {
if ( intersects[ 0 ].object != plane ) {
scene.remove( intersects[ 0 ].object );
}
} else {
var position = new THREE.Vector3().add( intersects[ 0 ].point, intersects[ 0 ].object.matrixRotationWorld.multiplyVector3( intersects[ 0 ].face.normal.clone() ) );
var voxel = new THREE.Mesh( new THREE.CubeGeometry( 50, 50, 50 ), new THREE.MeshLambertMaterial( { color: 0x00ff80, opacity: 1 } ) );
voxel.position.x = Math.floor( position.x / 50 ) * 50 + 25;
voxel.position.y = Math.floor( position.y / 50 ) * 50 + 25;
voxel.position.z = Math.floor( position.z / 50 ) * 50 + 25;
voxel.matrixAutoUpdate = false;
voxel.updateMatrix();
scene.add( voxel );
}
}
}
function onDocumentKeyDown( event ) {
switch( event.keyCode ) {
case 16: isShiftDown = true; break;
case 17: isCtrlDown = true; break;
}
}
function onDocumentKeyUp( event ) {
switch( event.keyCode ) {
case 16: isShiftDown = false; break;
case 17: isCtrlDown = false; break;
}
}
function save() {
window.open( renderer.domElement.toDataURL('image/png'), 'mywindow' );
}
//
function animate() {
requestAnimationFrame( animate );
render();
stats.update();
}
function render() {
if ( isShiftDown ) {
theta += mouse2D.x * 3;
}
camera.position.x = 1400 * Math.sin( theta * Math.PI / 360 );
camera.position.z = 1400 * Math.cos( theta * Math.PI / 360 );
camera.lookAt( target );
mouse3D = projector.unprojectVector( mouse2D.clone(), camera );
ray.direction = mouse3D.subSelf( camera.position ).normalize();
var intersects = ray.intersectObjects( scene.children );
if ( intersects.length > 0 ) {
if ( intersects[ 0 ].face != rollOveredFace ) {
if ( rollOveredFace ) rollOveredFace.materials = [];
rollOveredFace = intersects[ 0 ].face;
rollOveredFace.materials = [ new THREE.MeshBasicMaterial( { color: 0xff0000, opacity: 0.5 } ) ];
}
} else if ( rollOveredFace ) {
rollOveredFace.materials = [];
rollOveredFace = null;
}
renderer.render( scene, camera );
}
</script>
</body>
</html>