javascript
/
three.js
spiegel van https://github.com/tazdij/three.js.git


			
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							<!DOCTYPE html>
<html lang="en">
	<head>
		<title>three.js webgl - geometry - shapes</title>
		<meta charset="utf-8">
		<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
		<link type="text/css" rel="stylesheet" href="main.css">
		<style>
			body {
				background-color: #f0f0f0;
				color: #444;
			}
		</style>
	</head>
	<body>

		<div id="info">Simple procedurally-generated shapes</div>

		<!-- Import maps polyfill -->
		<!-- Remove this when import maps will be widely supported -->
		<script async src="https://unpkg.com/[email protected]/dist/es-module-shims.js"></script>

		<script type="importmap">
			{
				"imports": {
					"three": "../build/three.module.js",
					"three/addons/": "./jsm/"
				}
			}
		</script>

		<script type="module">

			import * as THREE from 'three';

			import Stats from 'three/addons/libs/stats.module.js';

			let container, stats;

			let camera, scene, renderer;

			let group;

			let targetRotation = 0;
			let targetRotationOnPointerDown = 0;

			let pointerX = 0;
			let pointerXOnPointerDown = 0;

			let windowHalfX = window.innerWidth / 2;

			init();
			animate();

			function init() {

				container = document.createElement( 'div' );
				document.body.appendChild( container );

				scene = new THREE.Scene();
				scene.background = new THREE.Color( 0xf0f0f0 );

				camera = new THREE.PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 1, 1000 );
				camera.position.set( 0, 150, 500 );
				scene.add( camera );

				const light = new THREE.PointLight( 0xffffff, 0.8 );
				camera.add( light );

				group = new THREE.Group();
				group.position.y = 50;
				scene.add( group );

				const loader = new THREE.TextureLoader();
				const texture = loader.load( 'textures/uv_grid_opengl.jpg' );
				texture.colorSpace = THREE.SRGBColorSpace;

				// it's necessary to apply these settings in order to correctly display the texture on a shape geometry

				texture.wrapS = texture.wrapT = THREE.RepeatWrapping;
				texture.repeat.set( 0.008, 0.008 );

				function addShape( shape, extrudeSettings, color, x, y, z, rx, ry, rz, s ) {

					// flat shape with texture
					// note: default UVs generated by THREE.ShapeGeometry are simply the x- and y-coordinates of the vertices

					let geometry = new THREE.ShapeGeometry( shape );

					let mesh = new THREE.Mesh( geometry, new THREE.MeshPhongMaterial( { side: THREE.DoubleSide, map: texture } ) );
					mesh.position.set( x, y, z - 175 );
					mesh.rotation.set( rx, ry, rz );
					mesh.scale.set( s, s, s );
					group.add( mesh );

					// flat shape

					geometry = new THREE.ShapeGeometry( shape );

					mesh = new THREE.Mesh( geometry, new THREE.MeshPhongMaterial( { color: color, side: THREE.DoubleSide } ) );
					mesh.position.set( x, y, z - 125 );
					mesh.rotation.set( rx, ry, rz );
					mesh.scale.set( s, s, s );
					group.add( mesh );

					// extruded shape

					geometry = new THREE.ExtrudeGeometry( shape, extrudeSettings );

					mesh = new THREE.Mesh( geometry, new THREE.MeshPhongMaterial( { color: color } ) );
					mesh.position.set( x, y, z - 75 );
					mesh.rotation.set( rx, ry, rz );
					mesh.scale.set( s, s, s );
					group.add( mesh );

					addLineShape( shape, color, x, y, z, rx, ry, rz, s );

				}

				function addLineShape( shape, color, x, y, z, rx, ry, rz, s ) {

					// lines

					shape.autoClose = true;

					const points = shape.getPoints();
					const spacedPoints = shape.getSpacedPoints( 50 );

					const geometryPoints = new THREE.BufferGeometry().setFromPoints( points );
					const geometrySpacedPoints = new THREE.BufferGeometry().setFromPoints( spacedPoints );

					// solid line

					let line = new THREE.Line( geometryPoints, new THREE.LineBasicMaterial( { color: color } ) );
					line.position.set( x, y, z - 25 );
					line.rotation.set( rx, ry, rz );
					line.scale.set( s, s, s );
					group.add( line );

					// line from equidistance sampled points

					line = new THREE.Line( geometrySpacedPoints, new THREE.LineBasicMaterial( { color: color } ) );
					line.position.set( x, y, z + 25 );
					line.rotation.set( rx, ry, rz );
					line.scale.set( s, s, s );
					group.add( line );

					// vertices from real points

					let particles = new THREE.Points( geometryPoints, new THREE.PointsMaterial( { color: color, size: 4 } ) );
					particles.position.set( x, y, z + 75 );
					particles.rotation.set( rx, ry, rz );
					particles.scale.set( s, s, s );
					group.add( particles );

					// equidistance sampled points

					particles = new THREE.Points( geometrySpacedPoints, new THREE.PointsMaterial( { color: color, size: 4 } ) );
					particles.position.set( x, y, z + 125 );
					particles.rotation.set( rx, ry, rz );
					particles.scale.set( s, s, s );
					group.add( particles );

				}


				// California

				const californiaPts = [];

				californiaPts.push( new THREE.Vector2( 610, 320 ) );
				californiaPts.push( new THREE.Vector2( 450, 300 ) );
				californiaPts.push( new THREE.Vector2( 392, 392 ) );
				californiaPts.push( new THREE.Vector2( 266, 438 ) );
				californiaPts.push( new THREE.Vector2( 190, 570 ) );
				californiaPts.push( new THREE.Vector2( 190, 600 ) );
				californiaPts.push( new THREE.Vector2( 160, 620 ) );
				californiaPts.push( new THREE.Vector2( 160, 650 ) );
				californiaPts.push( new THREE.Vector2( 180, 640 ) );
				californiaPts.push( new THREE.Vector2( 165, 680 ) );
				californiaPts.push( new THREE.Vector2( 150, 670 ) );
				californiaPts.push( new THREE.Vector2( 90, 737 ) );
				californiaPts.push( new THREE.Vector2( 80, 795 ) );
				californiaPts.push( new THREE.Vector2( 50, 835 ) );
				californiaPts.push( new THREE.Vector2( 64, 870 ) );
				californiaPts.push( new THREE.Vector2( 60, 945 ) );
				californiaPts.push( new THREE.Vector2( 300, 945 ) );
				californiaPts.push( new THREE.Vector2( 300, 743 ) );
				californiaPts.push( new THREE.Vector2( 600, 473 ) );
				californiaPts.push( new THREE.Vector2( 626, 425 ) );
				californiaPts.push( new THREE.Vector2( 600, 370 ) );
				californiaPts.push( new THREE.Vector2( 610, 320 ) );

				for ( let i = 0; i < californiaPts.length; i ++ ) californiaPts[ i ].multiplyScalar( 0.25 );

				const californiaShape = new THREE.Shape( californiaPts );


				// Triangle

				const triangleShape = new THREE.Shape()
					.moveTo( 80, 20 )
					.lineTo( 40, 80 )
					.lineTo( 120, 80 )
					.lineTo( 80, 20 ); // close path


				// Heart

				const x = 0, y = 0;

				const heartShape = new THREE.Shape()
					.moveTo( x + 25, y + 25 )
					.bezierCurveTo( x + 25, y + 25, x + 20, y, x, y )
					.bezierCurveTo( x - 30, y, x - 30, y + 35, x - 30, y + 35 )
					.bezierCurveTo( x - 30, y + 55, x - 10, y + 77, x + 25, y + 95 )
					.bezierCurveTo( x + 60, y + 77, x + 80, y + 55, x + 80, y + 35 )
					.bezierCurveTo( x + 80, y + 35, x + 80, y, x + 50, y )
					.bezierCurveTo( x + 35, y, x + 25, y + 25, x + 25, y + 25 );


				// Square

				const sqLength = 80;

				const squareShape = new THREE.Shape()
					.moveTo( 0, 0 )
					.lineTo( 0, sqLength )
					.lineTo( sqLength, sqLength )
					.lineTo( sqLength, 0 )
					.lineTo( 0, 0 );

				// Rounded rectangle

				const roundedRectShape = new THREE.Shape();

				( function roundedRect( ctx, x, y, width, height, radius ) {

					ctx.moveTo( x, y + radius );
					ctx.lineTo( x, y + height - radius );
					ctx.quadraticCurveTo( x, y + height, x + radius, y + height );
					ctx.lineTo( x + width - radius, y + height );
					ctx.quadraticCurveTo( x + width, y + height, x + width, y + height - radius );
					ctx.lineTo( x + width, y + radius );
					ctx.quadraticCurveTo( x + width, y, x + width - radius, y );
					ctx.lineTo( x + radius, y );
					ctx.quadraticCurveTo( x, y, x, y + radius );

				} )( roundedRectShape, 0, 0, 50, 50, 20 );


				// Track

				const trackShape = new THREE.Shape()
					.moveTo( 40, 40 )
					.lineTo( 40, 160 )
					.absarc( 60, 160, 20, Math.PI, 0, true )
					.lineTo( 80, 40 )
					.absarc( 60, 40, 20, 2 * Math.PI, Math.PI, true );


				// Circle

				const circleRadius = 40;
				const circleShape = new THREE.Shape()
					.moveTo( 0, circleRadius )
					.quadraticCurveTo( circleRadius, circleRadius, circleRadius, 0 )
					.quadraticCurveTo( circleRadius, - circleRadius, 0, - circleRadius )
					.quadraticCurveTo( - circleRadius, - circleRadius, - circleRadius, 0 )
					.quadraticCurveTo( - circleRadius, circleRadius, 0, circleRadius );


				// Fish

				const fishShape = new THREE.Shape()
					.moveTo( x, y )
					.quadraticCurveTo( x + 50, y - 80, x + 90, y - 10 )
					.quadraticCurveTo( x + 100, y - 10, x + 115, y - 40 )
					.quadraticCurveTo( x + 115, y, x + 115, y + 40 )
					.quadraticCurveTo( x + 100, y + 10, x + 90, y + 10 )
					.quadraticCurveTo( x + 50, y + 80, x, y );


				// Arc circle

				const arcShape = new THREE.Shape()
					.moveTo( 50, 10 )
					.absarc( 10, 10, 40, 0, Math.PI * 2, false );

				const holePath = new THREE.Path()
					.moveTo( 20, 10 )
					.absarc( 10, 10, 10, 0, Math.PI * 2, true );

				arcShape.holes.push( holePath );


				// Smiley

				const smileyShape = new THREE.Shape()
					.moveTo( 80, 40 )
					.absarc( 40, 40, 40, 0, Math.PI * 2, false );

				const smileyEye1Path = new THREE.Path()
					.moveTo( 35, 20 )
					.absellipse( 25, 20, 10, 10, 0, Math.PI * 2, true );

				const smileyEye2Path = new THREE.Path()
					.moveTo( 65, 20 )
					.absarc( 55, 20, 10, 0, Math.PI * 2, true );

				const smileyMouthPath = new THREE.Path()
					.moveTo( 20, 40 )
					.quadraticCurveTo( 40, 60, 60, 40 )
					.bezierCurveTo( 70, 45, 70, 50, 60, 60 )
					.quadraticCurveTo( 40, 80, 20, 60 )
					.quadraticCurveTo( 5, 50, 20, 40 );

				smileyShape.holes.push( smileyEye1Path );
				smileyShape.holes.push( smileyEye2Path );
				smileyShape.holes.push( smileyMouthPath );


				// Spline shape

				const splinepts = [];
				splinepts.push( new THREE.Vector2( 70, 20 ) );
				splinepts.push( new THREE.Vector2( 80, 90 ) );
				splinepts.push( new THREE.Vector2( - 30, 70 ) );
				splinepts.push( new THREE.Vector2( 0, 0 ) );

				const splineShape = new THREE.Shape()
					.moveTo( 0, 0 )
					.splineThru( splinepts );

				const extrudeSettings = { depth: 8, bevelEnabled: true, bevelSegments: 2, steps: 2, bevelSize: 1, bevelThickness: 1 };

				// addShape( shape, color, x, y, z, rx, ry,rz, s );

				addShape( californiaShape, extrudeSettings, 0xf08000, - 300, - 100, 0, 0, 0, 0, 1 );
				addShape( triangleShape, extrudeSettings, 0x8080f0, - 180, 0, 0, 0, 0, 0, 1 );
				addShape( roundedRectShape, extrudeSettings, 0x008000, - 150, 150, 0, 0, 0, 0, 1 );
				addShape( trackShape, extrudeSettings, 0x008080, 200, - 100, 0, 0, 0, 0, 1 );
				addShape( squareShape, extrudeSettings, 0x0040f0, 150, 100, 0, 0, 0, 0, 1 );
				addShape( heartShape, extrudeSettings, 0xf00000, 60, 100, 0, 0, 0, Math.PI, 1 );
				addShape( circleShape, extrudeSettings, 0x00f000, 120, 250, 0, 0, 0, 0, 1 );
				addShape( fishShape, extrudeSettings, 0x404040, - 60, 200, 0, 0, 0, 0, 1 );
				addShape( smileyShape, extrudeSettings, 0xf000f0, - 200, 250, 0, 0, 0, Math.PI, 1 );
				addShape( arcShape, extrudeSettings, 0x804000, 150, 0, 0, 0, 0, 0, 1 );
				addShape( splineShape, extrudeSettings, 0x808080, - 50, - 100, 0, 0, 0, 0, 1 );

				addLineShape( arcShape.holes[ 0 ], 0x804000, 150, 0, 0, 0, 0, 0, 1 );

				for ( let i = 0; i < smileyShape.holes.length; i += 1 ) {

					addLineShape( smileyShape.holes[ i ], 0xf000f0, - 200, 250, 0, 0, 0, Math.PI, 1 );

				}

				//

				renderer = new THREE.WebGLRenderer( { antialias: true } );
				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( window.innerWidth, window.innerHeight );
				container.appendChild( renderer.domElement );

				stats = new Stats();
				container.appendChild( stats.dom );

				container.style.touchAction = 'none';
				container.addEventListener( 'pointerdown', onPointerDown );

				//

				window.addEventListener( 'resize', onWindowResize );

			}

			function onWindowResize() {

				windowHalfX = window.innerWidth / 2;

				camera.aspect = window.innerWidth / window.innerHeight;
				camera.updateProjectionMatrix();

				renderer.setSize( window.innerWidth, window.innerHeight );

			}

			//

			function onPointerDown( event ) {

				if ( event.isPrimary === false ) return;

				pointerXOnPointerDown = event.clientX - windowHalfX;
				targetRotationOnPointerDown = targetRotation;

				document.addEventListener( 'pointermove', onPointerMove );
				document.addEventListener( 'pointerup', onPointerUp );

			}

			function onPointerMove( event ) {

				if ( event.isPrimary === false ) return;

				pointerX = event.clientX - windowHalfX;

				targetRotation = targetRotationOnPointerDown + ( pointerX - pointerXOnPointerDown ) * 0.02;

			}

			function onPointerUp() {

				if ( event.isPrimary === false ) return;

				document.removeEventListener( 'pointermove', onPointerMove );
				document.removeEventListener( 'pointerup', onPointerUp );

			}

			//

			function animate() {

				requestAnimationFrame( animate );

				render();
				stats.update();

			}

			function render() {

				group.rotation.y += ( targetRotation - group.rotation.y ) * 0.05;
				renderer.render( scene, camera );

			}

		</script>

	</body>
</html>