<!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">
<style>
body {
font-family: Monospace;
background-color: #f0f0f0;
margin: 0px;
overflow: hidden;
}
</style>
</head>
<body>
<script src="js/three.js"></script>
<script src="js/libs/stats.min.js"></script>
<script>
var container, stats;
var camera, scene, renderer;
var group;
var targetRotation = 0;
var targetRotationOnMouseDown = 0;
var mouseX = 0;
var mouseXOnMouseDown = 0;
var windowHalfX = window.innerWidth / 2;
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 = 'Simple procedurally-generated shapes<br/>Drag to spin';
container.appendChild( info );
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 );
var light = new THREE.PointLight( 0xffffff, 0.8 );
camera.add( light );
group = new THREE.Group();
group.position.y = 50;
scene.add( group );
var loader = new THREE.TextureLoader();
var texture = loader.load( "textures/UV_Grid_Sm.jpg" );
// 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, position, rotation, s ,transparent) {
// flat shape with texture
// note: default UVs generated by ShapeBufferGeometry are simply the x- and y-coordinates of the vertices
var geometry = new THREE.ShapeBufferGeometry( shape );
/*
var mesh = new THREE.Mesh( geometry, new THREE.MeshPhongMaterial( { side: THREE.DoubleSide, map: texture } ) );
mesh.position.set( position.x, position.y, position.z - 175 );
mesh.rotation.set( rotation.x, rotation.y, rotation.z );
mesh.scale.set( s, s, s );
group.add( mesh );
// flat shape
var geometry = new THREE.ShapeBufferGeometry( shape );
var mesh = new THREE.Mesh( geometry, new THREE.MeshPhongMaterial( { color: color, side: THREE.DoubleSide } ) );
mesh.position.set( position.x, position.y, position.z - 125 );
mesh.rotation.set( rotation.x, rotation.y, rotation.z );
mesh.scale.set( s, s, s );
group.add( mesh );
*/
// extruded shape
var geometry = new THREE.ExtrudeBufferGeometry( shape, extrudeSettings );
var material = new THREE.MeshPhongMaterial( { color: color } )
material.transparent = transparent === true ? true : false;
if (material.transparent) {
/*
* opacity和blending都可以設置成透明度。
*
* opacity: 自己調整0~1之間的值， 比起blending自由
* blending：固定的幾個值 three.js中已經定義好
* "NoBlending", "NormalBlending", "AdditiveBlending",
* "SubtractiveBlending", "MultiplyBlending", "CustomBlending"
*/
material.opacity = 0.8
// material.blending = THREE[ 'AdditiveBlending' ];
}
var mesh = new THREE.Mesh( geometry, material);
mesh.position.set( position.x, position.y, position.z - 75 );
mesh.rotation.set( rotation.x, rotation.y, rotation.z );
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;
var points = shape.getPoints();
var spacedPoints = shape.getSpacedPoints( 50 );
var geometryPoints = new THREE.BufferGeometry().setFromPoints( points );
var geometrySpacedPoints = new THREE.BufferGeometry().setFromPoints( spacedPoints );
// solid line
var 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
var 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
var 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
var 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 );
}
var x = 0, y = 0;
var extrudeSettings = { depth: 8, bevelEnabled: true, bevelSegments: 2, steps: 2, bevelSize: 1, bevelThickness: 1 };
function showCaliforniaShape() {
// California
var 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 ( var i = 0; i < californiaPts.length; i ++ ) californiaPts[ i ].multiplyScalar( 0.25 );
var californiaShape = new THREE.Shape( californiaPts );
var position = {x:-300,y: - 100,z:0}
var rotation = {x:0,y:0,z:0};
addShape( californiaShape, extrudeSettings, 0xf08000, position, rotation, 1 );
}
function shwoTriangleShape() {
// Triangle
var triangleShape = new THREE.Shape();
triangleShape.moveTo( 80, 20 );
triangleShape.lineTo( 40, 80 );
triangleShape.lineTo( 120, 80 );
triangleShape.lineTo( 80, 20 ); // close path
var position = {x:-180,y: 0,z:0}
var rotation = {x:0,y:0,z:0};
addShape( triangleShape, extrudeSettings, 0x8080f0, position, rotation, 1 );
}
function showArcShape() {
// Arc circle
var arcShape = new THREE.Shape();
arcShape.moveTo( 50, 10 );
arcShape.absarc( 10, 10, 40, 0, Math.PI * 2, false );
var holePath = new THREE.Path();
holePath.moveTo( 20, 10 );
holePath.absarc( 10, 10, 10, 0, Math.PI * 2, true );
arcShape.holes.push( holePath );
var position = {x:150,y: 0,z:0}
var rotation = {x:0,y:0,z:0}
addShape( arcShape, extrudeSettings, 0x804000, position, rotation, 1 );
addLineShape( arcShape.holes[ 0 ], 0x804000, 150, 0, 0, 0, 0, 0, 1 );
}
/**
* 圓角方形
*/
function showRoundedRectShape() {
// Rounded rectangle
var 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 );
var position = {x:-150,y: 150,z:0}
var rotation = {x:0,y:0,z:0}
addShape( roundedRectShape, extrudeSettings, 0x008000, position, rotation, 1 );
}
function showHeartShape() {
var heartShape = new THREE.Shape(); // From http://blog.burlock.org/html5/130-paths
heartShape.moveTo( x + 25, y + 25 );
heartShape.bezierCurveTo( x + 25, y + 25, x + 20, y, x, y );
heartShape.bezierCurveTo( x - 30, y, x - 30, y + 35, x - 30, y + 35 );
heartShape.bezierCurveTo( x - 30, y + 55, x - 10, y + 77, x + 25, y + 95 );
heartShape.bezierCurveTo( x + 60, y + 77, x + 80, y + 55, x + 80, y + 35 );
heartShape.bezierCurveTo( x + 80, y + 35, x + 80, y, x + 50, y );
heartShape.bezierCurveTo( x + 35, y, x + 25, y + 25, x + 25, y + 25 );
var position = {x:60,y: 100,z:0}
var rotation = {x:0,y:0,z: Math.PI}
addShape( heartShape, extrudeSettings, 0xf00000, position, rotation, 1 );
}
function showSquareShape() {
// Square
var sqLength = 80;
var squareShape = new THREE.Shape();
squareShape.moveTo( 0, 0 );
squareShape.lineTo( 0, sqLength );
squareShape.lineTo( sqLength, sqLength );
squareShape.lineTo( sqLength, 0 );
squareShape.lineTo( 0, 0 );
var position = {x:150,y: 100,z:0}
var rotation = {x:0,y:0,z:0}
addShape( squareShape, extrudeSettings, 0x0040f0, position, rotation, 1 );
}
/*
* 橢圓桌
*/
function showTrackShape() {
// Track
var trackShape = new THREE.Shape();
const start_X = 50;
const start_Y = 20;
const end_X = 200;
const end_Y = 100;
const radius = Math.abs(start_X - end_X) / 2; // 半徑
trackShape.moveTo( start_X, start_Y ); // 開始點
trackShape.lineTo( start_X, end_Y ); // 畫線
/*
* absarc的解釋
* 參考：https://developer.mozilla.org/zh-CN/docs/Web/API/CanvasRenderingContext2D/arc
* x：圓弧中心（圓心）的 x 軸座標。
* y：圓弧中心（圓心）的 y 軸座標。
* radius：圓弧的半徑。
* startAngle：圓弧的起始點， x軸方向開始計算，單位以弧度表示。
* endAngle： 圓弧的終點， 單位以弧度表示。
* anticlockwise：可選，可選的Boolean值 ，如果爲 true，逆時針繪製圓弧，反之，順時針繪製。
*/
trackShape.absarc( Math.abs(start_X - end_X) / 2 + start_X, end_Y, radius, Math.PI, 0, true ); // 弧線，並且第三個點
trackShape.lineTo( end_X, start_Y ); // 結束點
trackShape.absarc( Math.abs(start_X - end_X) / 2 + start_X, start_Y, radius, 2 * Math.PI, Math.PI, true ); // 弧線，並且回到開始點
var position = {x:0,y: 0,z:-100}
var rotation = {x:0,y:0,z:0}
// var rotation = {x:Math.PI/2,y:0,z:0}
addShape( trackShape, extrudeSettings, 0x008080, position, rotation, 1 , true);
}
function shwoCircleShape() {
// Circle
var circleRadius = 40;
var circleShape = new THREE.Shape();
circleShape.moveTo( 0, circleRadius );
circleShape.quadraticCurveTo( circleRadius, circleRadius, circleRadius, 0 );
circleShape.quadraticCurveTo( circleRadius, - circleRadius, 0, - circleRadius );
circleShape.quadraticCurveTo( - circleRadius, - circleRadius, - circleRadius, 0 );
circleShape.quadraticCurveTo( - circleRadius, circleRadius, 0, circleRadius );
var position = {x:120,y: 250,z:0}
var rotation = {x:0,y:0,z:0}
addShape( circleShape, extrudeSettings, 0x00f000, position, rotation, 1 );
}
function showFishShape () {
// Fish
var x = y = 0;
var fishShape = new THREE.Shape();
fishShape.moveTo( x, y );
fishShape.quadraticCurveTo( x + 50, y - 80, x + 90, y - 10 );
fishShape.quadraticCurveTo( x + 100, y - 10, x + 115, y - 40 );
fishShape.quadraticCurveTo( x + 115, y, x + 115, y + 40 );
fishShape.quadraticCurveTo( x + 100, y + 10, x + 90, y + 10 );
fishShape.quadraticCurveTo( x + 50, y + 80, x, y );
var position = {x:- 60,y: 200,z:0}
var rotation = {x:0,y:0,z:0}
addShape( fishShape, extrudeSettings, 0x404040, position, rotation, 1 );
}
function showSmileyShape() {
// Smiley
var smileyShape = new THREE.Shape();
smileyShape.moveTo( 80, 40 );
smileyShape.absarc( 40, 40, 40, 0, Math.PI * 2, false );
var smileyEye1Path = new THREE.Path();
smileyEye1Path.moveTo( 35, 20 );
smileyEye1Path.absellipse( 25, 20, 10, 10, 0, Math.PI * 2, true );
smileyShape.holes.push( smileyEye1Path );
var smileyEye2Path = new THREE.Path();
smileyEye2Path.moveTo( 65, 20 );
smileyEye2Path.absarc( 55, 20, 10, 0, Math.PI * 2, true );
smileyShape.holes.push( smileyEye2Path );
var smileyMouthPath = new THREE.Path();
smileyMouthPath.moveTo( 20, 40 );
smileyMouthPath.quadraticCurveTo( 40, 60, 60, 40 );
smileyMouthPath.bezierCurveTo( 70, 45, 70, 50, 60, 60 );
smileyMouthPath.quadraticCurveTo( 40, 80, 20, 60 );
smileyMouthPath.quadraticCurveTo( 5, 50, 20, 40 );
smileyShape.holes.push( smileyMouthPath );
var position = {x:- 200,y: 250,z:0}
var rotation = {x:0,y:0,z:Math.PI}
addShape( smileyShape, extrudeSettings, 0xf000f0, position, rotation, 1 );
for ( var i = 0; i < smileyShape.holes.length; i += 1 ) {
addLineShape( smileyShape.holes[ i ], 0xf000f0, - 200, 250, 0, 0, 0, Math.PI, 1 );
}
}
function showSplineShape() {
// Spline shape
var 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 ) );
var splineShape = new THREE.Shape();
splineShape.moveTo( 0, 0 );
splineShape.splineThru( splinepts );
var position = {x:- 50,y:- 100,z:0}
var rotation = {x:0,y:0,z:0}
addShape( splineShape, extrudeSettings, 0x808080, position, rotation, 1 );
}
showCaliforniaShape() // 多邊形
showRoundedRectShape()// 圓角方形
shwoTriangleShape() // 三角形
showArcShape() // 圓
showHeartShape() // 心
showSquareShape() // 正方形
showTrackShape() // 橢圓
shwoCircleShape() // 圓
showFishShape() // 魚
showSmileyShape() // 臉
showSplineShape() // 多邊形
//
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 );
document.addEventListener( 'mousedown', onDocumentMouseDown, false );
document.addEventListener( 'touchstart', onDocumentTouchStart, false );
document.addEventListener( 'touchmove', onDocumentTouchMove, false );
//
window.addEventListener( 'resize', onWindowResize, false );
}
function onWindowResize() {
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() {
document.removeEventListener( 'mousemove', onDocumentMouseMove, false );
document.removeEventListener( 'mouseup', onDocumentMouseUp, false );
document.removeEventListener( 'mouseout', onDocumentMouseOut, false );
}
function onDocumentMouseOut() {
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();
stats.update();
}
function render() {
group.rotation.y += ( targetRotation - group.rotation.y ) * 0.05;
renderer.render( scene, camera );
}
</script>
</body>
</html>
