javascript
/
three.js
mirror of https://github.com/tazdij/three.js.git


			
				
					
						
						
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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.min.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();

				// 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() );
				plane.rotation.x = - Math.PI / 2;
				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 );

				//

				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();

				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>