mirror of
https://github.com/Doodle3D/Doodle3D-Slicer.git
synced 2024-12-24 03:53:49 +01:00
250 lines
6.3 KiB
HTML
Executable File
250 lines
6.3 KiB
HTML
Executable File
<!DOCTYPE html>
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<html lang="en">
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<!-- based on canvas_geometry_shapes.html -->
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<head>
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<title>three.js canvas - geometry - NURBS</title>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
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<style>
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body {
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font-family: Monospace;
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background-color: #f0f0f0;
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margin: 0px;
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overflow: hidden;
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}
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#info {
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position: absolute;
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top: 0px;
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width: 100%;
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padding: 5px;
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text-align:center;
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}
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</style>
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</head>
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<body>
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<canvas id="debug" style="position:absolute; left:100px"></canvas>
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<div id="info"><a href="http://threejs.org" target="_blank">three.js</a> - NURBS curve example</div>
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<script src="../build/three.min.js"></script>
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<script src="js/curves/NURBSCurve.js"></script>
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<script src="js/curves/NURBSUtils.js"></script>
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<script src="js/renderers/Projector.js"></script>
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<script src="js/renderers/CanvasRenderer.js"></script>
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<script src="js/libs/stats.min.js"></script>
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<script>
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var container, stats;
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var camera, scene, renderer;
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var group;
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var targetRotation = 0;
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var targetRotationOnMouseDown = 0;
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var mouseX = 0;
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var mouseXOnMouseDown = 0;
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var windowHalfX = window.innerWidth / 2;
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var windowHalfY = window.innerHeight / 2;
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init();
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animate();
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function init() {
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container = document.createElement( 'div' );
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document.body.appendChild( container );
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var info = document.createElement( 'div' );
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info.style.position = 'absolute';
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info.style.top = '30px';
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info.style.width = '100%';
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info.style.textAlign = 'center';
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info.innerHTML = 'Drag to spin';
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container.appendChild( info );
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camera = new THREE.PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 1, 1000 );
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camera.position.set( 0, 150, 500 );
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scene = new THREE.Scene();
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group = new THREE.Group();
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group.position.y = 50;
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scene.add( group );
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// NURBS curve
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var nurbsControlPoints = [];
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var nurbsKnots = [];
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var nurbsDegree = 3;
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for ( var i = 0; i <= nurbsDegree; i ++ ) {
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nurbsKnots.push( 0 );
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}
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for ( var i = 0, j = 20; i < j; i ++ ) {
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nurbsControlPoints.push(
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new THREE.Vector4(
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Math.random() * 400 - 200,
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Math.random() * 400,
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Math.random() * 400 - 200,
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1 // weight of control point: higher means stronger attraction
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)
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);
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var knot = ( i + 1 ) / ( j - nurbsDegree );
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nurbsKnots.push( THREE.Math.clamp( knot, 0, 1 ) );
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}
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var nurbsCurve = new THREE.NURBSCurve(nurbsDegree, nurbsKnots, nurbsControlPoints);
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var nurbsGeometry = new THREE.Geometry();
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nurbsGeometry.vertices = nurbsCurve.getPoints( 200 );
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var nurbsMaterial = new THREE.LineBasicMaterial( { linewidth: 10, color: 0x333333 } );
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var nurbsLine = new THREE.Line( nurbsGeometry, nurbsMaterial );
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nurbsLine.position.set( 0, -100, 0 );
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var nurbsControlPointsGeometry = new THREE.Geometry();
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nurbsControlPointsGeometry.vertices = nurbsCurve.controlPoints;
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var nurbsControlPointsMaterial = new THREE.LineBasicMaterial( { linewidth: 2, color: 0x333333, opacity: 0.25 } );
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var nurbsControlPointsLine = new THREE.Line( nurbsControlPointsGeometry, nurbsControlPointsMaterial );
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nurbsControlPointsLine.position.copy( nurbsLine.position );
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group.add( nurbsLine, nurbsControlPointsLine );
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// this also works:
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// group.add( nurbsLine ).add( nurbsControlPointsLine );
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//
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renderer = new THREE.CanvasRenderer();
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renderer.setClearColor( 0xf0f0f0 );
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renderer.setPixelRatio( window.devicePixelRatio );
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renderer.setSize( window.innerWidth, window.innerHeight );
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container.appendChild( renderer.domElement );
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stats = new Stats();
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stats.domElement.style.position = 'absolute';
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stats.domElement.style.top = '0px';
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container.appendChild( stats.domElement );
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document.addEventListener( 'mousedown', onDocumentMouseDown, false );
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document.addEventListener( 'touchstart', onDocumentTouchStart, false );
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document.addEventListener( 'touchmove', onDocumentTouchMove, false );
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//
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window.addEventListener( 'resize', onWindowResize, false );
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}
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function onWindowResize() {
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windowHalfX = window.innerWidth / 2;
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windowHalfY = window.innerHeight / 2;
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camera.aspect = window.innerWidth / window.innerHeight;
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camera.updateProjectionMatrix();
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renderer.setSize( window.innerWidth, window.innerHeight );
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}
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//
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function onDocumentMouseDown( event ) {
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event.preventDefault();
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document.addEventListener( 'mousemove', onDocumentMouseMove, false );
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document.addEventListener( 'mouseup', onDocumentMouseUp, false );
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document.addEventListener( 'mouseout', onDocumentMouseOut, false );
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mouseXOnMouseDown = event.clientX - windowHalfX;
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targetRotationOnMouseDown = targetRotation;
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}
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function onDocumentMouseMove( event ) {
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mouseX = event.clientX - windowHalfX;
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targetRotation = targetRotationOnMouseDown + ( mouseX - mouseXOnMouseDown ) * 0.02;
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}
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function onDocumentMouseUp( event ) {
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document.removeEventListener( 'mousemove', onDocumentMouseMove, false );
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document.removeEventListener( 'mouseup', onDocumentMouseUp, false );
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document.removeEventListener( 'mouseout', onDocumentMouseOut, false );
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}
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function onDocumentMouseOut( event ) {
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document.removeEventListener( 'mousemove', onDocumentMouseMove, false );
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document.removeEventListener( 'mouseup', onDocumentMouseUp, false );
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document.removeEventListener( 'mouseout', onDocumentMouseOut, false );
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}
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function onDocumentTouchStart( event ) {
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if ( event.touches.length == 1 ) {
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event.preventDefault();
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mouseXOnMouseDown = event.touches[ 0 ].pageX - windowHalfX;
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targetRotationOnMouseDown = targetRotation;
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}
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}
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function onDocumentTouchMove( event ) {
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if ( event.touches.length == 1 ) {
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event.preventDefault();
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mouseX = event.touches[ 0 ].pageX - windowHalfX;
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targetRotation = targetRotationOnMouseDown + ( mouseX - mouseXOnMouseDown ) * 0.05;
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}
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}
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//
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function animate() {
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requestAnimationFrame( animate );
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render();
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stats.update();
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}
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function render() {
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group.rotation.y += ( targetRotation - group.rotation.y ) * 0.05;
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renderer.render( scene, camera );
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}
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</script>
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</body>
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</html>
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