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| var container; | |
| var camera, scene, renderer; | |
| var text, parent; | |
| var targetRotation = 0; | |
| var targetRotationOnMouseDown = 0; | |
| var mouseX = 0; | |
| var mouseXOnMouseDown = 0; | |
| var windowHalfX = window.innerWidth / 2; | |
| var windowHalfY = window.innerHeight / 2; | |
| document.addEventListener('DOMContentLoaded', init); | |
| function init() { | |
| container = document.createElement( 'div' ); | |
| document.body.appendChild( container ); | |
| camera = new THREE.PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 1, 1000 ); | |
| camera.position.set( 0, 150, 500 ); | |
| scene = new THREE.Scene(); | |
| set3dText('nothing here..'); | |
| renderer = new THREE.CanvasRenderer(); | |
| renderer.setSize( window.innerWidth, window.innerHeight ); | |
| container.appendChild( renderer.domElement ); | |
| container.addEventListener( 'mousedown', onDocumentMouseDown, false ); | |
| container.addEventListener( 'touchstart', onDocumentTouchStart, false ); | |
| container.addEventListener( 'touchmove', onDocumentTouchMove, false ); | |
| // | |
| window.addEventListener( 'resize', onWindowResize, false ); | |
| animate(); | |
| } | |
| function set3dText(newText) { | |
| if (text && renderer) { | |
| scene.remove(text); | |
| } | |
| if (parent && renderer) { | |
| scene.remove(parent); | |
| } | |
| var text3d = new THREE.TextGeometry(newText, { | |
| size: 80, | |
| height: 20, | |
| curveSegments: 2, | |
| font: "helvetiker" | |
| }); | |
| text3d.computeBoundingBox(); | |
| var centerOffset = -0.5 * ( text3d.boundingBox.max.x - text3d.boundingBox.min.x ); | |
| var textMaterial = new THREE.MeshBasicMaterial( { color: Math.random() * 0xffffff, overdraw: true } ); | |
| text = new THREE.Mesh( text3d, textMaterial ); | |
| text.position.x = centerOffset; | |
| text.position.y = 100; | |
| text.position.z = 0; | |
| text.rotation.x = 0; | |
| text.rotation.y = Math.PI * 2; | |
| parent = new THREE.Object3D(); | |
| parent.add( text ); | |
| scene.add( parent ); | |
| } | |
| function onWindowResize() { | |
| windowHalfX = window.innerWidth / 2; | |
| windowHalfY = window.innerHeight / 2; | |
| camera.aspect = window.innerWidth / window.innerHeight; | |
| camera.updateProjectionMatrix(); | |
| renderer.setSize( window.innerWidth, window.innerHeight ); | |
| } | |
| // | |
| function onDocumentMouseDown( event ) { | |
| event.preventDefault(); | |
| document.addEventListener( 'mousemove', onDocumentMouseMove, false ); | |
| document.addEventListener( 'mouseup', onDocumentMouseUp, false ); | |
| document.addEventListener( 'mouseout', onDocumentMouseOut, false ); | |
| mouseXOnMouseDown = event.clientX - windowHalfX; | |
| targetRotationOnMouseDown = targetRotation; | |
| } | |
| function onDocumentMouseMove( event ) { | |
| mouseX = event.clientX - windowHalfX; | |
| targetRotation = targetRotationOnMouseDown + ( mouseX - mouseXOnMouseDown ) * 0.02; | |
| } | |
| function onDocumentMouseUp( event ) { | |
| document.removeEventListener( 'mousemove', onDocumentMouseMove, false ); | |
| document.removeEventListener( 'mouseup', onDocumentMouseUp, false ); | |
| document.removeEventListener( 'mouseout', onDocumentMouseOut, false ); | |
| } | |
| function onDocumentMouseOut( event ) { | |
| document.removeEventListener( 'mousemove', onDocumentMouseMove, false ); | |
| document.removeEventListener( 'mouseup', onDocumentMouseUp, false ); | |
| document.removeEventListener( 'mouseout', onDocumentMouseOut, false ); | |
| } | |
| function onDocumentTouchStart( event ) { | |
| if ( event.touches.length == 1 ) { | |
| event.preventDefault(); | |
| mouseXOnMouseDown = event.touches[ 0 ].pageX - windowHalfX; | |
| targetRotationOnMouseDown = targetRotation; | |
| } | |
| } | |
| function onDocumentTouchMove( event ) { | |
| if ( event.touches.length == 1 ) { | |
| event.preventDefault(); | |
| mouseX = event.touches[ 0 ].pageX - windowHalfX; | |
| targetRotation = targetRotationOnMouseDown + ( mouseX - mouseXOnMouseDown ) * 0.05; | |
| } | |
| } | |
| // | |
| function animate() { | |
| requestAnimationFrame( animate ); | |
| render(); | |
| } | |
| function render() { | |
| parent.rotation.y += ( targetRotation - parent.rotation.y ) * 0.05; | |
| renderer.render( scene, camera ); | |
| } |
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