javascript
/
three.js
oglindă de 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/libs/stats.min.js"></script>

		<script>

			var container, stats;
			var camera, scene, renderer;
			var projector, plane;

			var mouse2D, mouse3D, raycaster, theta = 45,
			isShiftDown = false, isCtrlDown = false,
			target = new THREE.Vector3( 0, 200, 0 );
			var normalMatrix = new THREE.Matrix3();

			var cubeGeometry = new THREE.BoxGeometry( 50, 50, 50 );
			var cubeMaterial = new THREE.MeshLambertMaterial( { color: 0x00ff80, overdraw: 0.5 } );

			var objects = [];

			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://threejs.org" target="_blank">three.js</a> - voxel painter<br><strong>click</strong>: add voxel, <strong>shift + click</strong>: remove voxel, <strong>control</strong>: rotate, <a href="javascript:save()">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 size = 500, step = 50;

				var geometry = new THREE.Geometry();

				for ( var i = - size; i <= size; i += step ) {

					geometry.vertices.push( new THREE.Vector3( - size, 0, i ) );
					geometry.vertices.push( new THREE.Vector3(   size, 0, i ) );

					geometry.vertices.push( new THREE.Vector3( i, 0, - size ) );
					geometry.vertices.push( new THREE.Vector3( i, 0,   size ) );

				}

				var material = new THREE.LineBasicMaterial( { color: 0x000000, opacity: 0.2 } );

				var line = new THREE.Line( geometry, material );
				line.type = THREE.LinePieces;
				scene.add( line );

				//

				projector = new THREE.Projector();

				plane = new THREE.Mesh( new THREE.PlaneGeometry( 1000, 1000 ), new THREE.MeshBasicMaterial() );
				plane.rotation.x = - Math.PI / 2;
				plane.visible = false;
				scene.add( plane );

				objects.push( plane );

				var material = new THREE.MeshBasicMaterial( { color: 0xff0000, wireframe: true } );

				mouse2D = new THREE.Vector3( 0, 10000, 0.5 );

				// 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.setClearColor( 0xf0f0f0 );
				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;

				var intersects = raycaster.intersectObjects( scene.children );

				if ( intersects.length > 0 ) {

					// TODO

				}

			}

			function onDocumentMouseDown( event ) {

				event.preventDefault();

				var intersects = raycaster.intersectObjects( objects );

				if ( intersects.length > 0 ) {

					var intersect = intersects[ 0 ];

					if ( isShiftDown ) {

						if ( intersect.object != plane ) {

							scene.remove( intersect.object );

							objects.splice( objects.indexOf( intersect.object ), 1 );

						}

					} else {

						normalMatrix.getNormalMatrix( intersect.object.matrixWorld );

						var normal = intersect.face.normal.clone();
						normal.applyMatrix3( normalMatrix ).normalize();

						var voxel = new THREE.Mesh( cubeGeometry, cubeMaterial );
						voxel.position.addVectors( intersect.point, normal );
						voxel.position.divideScalar( 50 ).floor().multiplyScalar( 50 ).addScalar( 25 );
						scene.add( voxel );

						objects.push( 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' );
				return false;

			}

			//

			function animate() {

				requestAnimationFrame( animate );

				render();
				stats.update();

			}

			function render() {

				if ( isCtrlDown ) {

					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 );

				raycaster = projector.pickingRay( mouse2D.clone(), camera );

				renderer.render( scene, camera );

			}

		</script>

	</body>
</html>