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webgl_geometry_spline_editor-注释代码.html
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webgl_geometry_spline_editor-注释代码.html
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<!DOCTYPE html>
<html lang="en">
<head>
<title>three.js webgl - geometry - catmull spline editor</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.js"></script>
<script src="js/controls/OrbitControls.js"></script>
<script src="js/controls/TransformControls.js"></script>
<script src="js/controls/DragControls.js"></script>
<script src="js/materials/ShadowMaterial.js"></script>
<script src="js/libs/stats.min.js"></script>
<script>
String.prototype.format = function () {
var str = this;
for ( var i = 0; i < arguments.length; i ++ ) {
str = str.replace( '{' + i + '}', arguments[ i ] );
}
return str;
}
var container, stats; //div对象
var camera, scene, renderer; //相机对象
var splineHelperObjects = [], //帮助数组？
splineOutline;
var splinePointsLength = 4; //线条点的个数？
var positions = []; //位置
var options; //操作其选项
var geometry = new THREE.BoxGeometry( 20, 20, 20 ); //创建一个球体
var ARC_SEGMENTS = 200;
var splineMesh;
var splines = {
};
init();
animate();
function init() {
container = document.createElement( 'div' );
document.body.appendChild( container );
scene = new THREE.Scene();
camera = new THREE.PerspectiveCamera( 70, window.innerWidth / window.innerHeight, 1, 10000 );
camera.position.z = 1000;
scene.add( camera );
scene.add( new THREE.AmbientLight( 0xf0f0f0 ) );
var light = new THREE.SpotLight( 0xffffff, 1.5 );
light.position.set( 0, 1500, 200 );
light.castShadow = true;
light.shadow = new THREE.LightShadow( new THREE.PerspectiveCamera( 70, 1, 200, 2000 ) );
light.shadow.bias = -0.000222;
light.shadow.mapSize.width = 1024;
light.shadow.mapSize.height = 1024;
scene.add( light );
spotlight = light;
// scene.add( new THREE.CameraHelper( light.shadow.camera ) );
var planeGeometry = new THREE.PlaneGeometry( 2000, 2000 );
planeGeometry.rotateX( - Math.PI / 2 );
var planeMaterial = new THREE.ShadowMaterial();
planeMaterial.opacity = 0.2;
var plane = new THREE.Mesh( planeGeometry, planeMaterial );
plane.position.y = -200;
plane.receiveShadow = true;
scene.add( plane );
var helper = new THREE.GridHelper( 1000, 100 );
helper.position.y = - 199;
helper.material.opacity = 0.25;
helper.material.transparent = true;
scene.add( helper );
var axis = new THREE.AxisHelper();
axis.position.set( -500, -500, -500 );
scene.add( axis );
renderer = new THREE.WebGLRenderer( { antialias: true } );
renderer.setClearColor( 0xf0f0f0 );
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( window.innerWidth, window.innerHeight );
renderer.shadowMap.enabled = true;
container.appendChild( renderer.domElement );
var info = document.createElement( 'div' );
info.style.position = 'absolute';
info.style.top = '10px';
info.style.width = '100%';
info.style.textAlign = 'center';
info.innerHTML = 'catmull-rom rom spline comparisions';
options = document.createElement( 'div' );
options.style.position = 'absolute';
options.style.top = '30px';
options.style.width = '100%';
options.style.textAlign = 'center';
options.innerHTML = 'Points: <input type="button" onclick="addPoint();" value="+" />\
<input type="button" onclick="removePoint();" value="-" />\
<input type="button" onclick="exportSpline();" value="Export" /><br />\
<input type="checkbox" id="uniform" checked /> <label for="uniform">Uniform Catmull-rom</label> <input type="range" id="tension" onchange="splines.uniform.tension = tension.value;updateSplineOutline();" min=0 max=1 step=0.01 value=0.5 /> <span id="tension_value" /></span> <br />\
<input type="checkbox" id="centripetal" checked /> Centripetal Catmull-rom<br />\
<input type="checkbox" id="chordal" checked /> Chordal Catmull-rom<br />';
container.appendChild( info );
container.appendChild( options );
stats = new Stats();
container.appendChild( stats.dom );
// Controls
controls = new THREE.OrbitControls( camera, renderer.domElement );
controls.damping = 0.2;
controls.addEventListener( 'change', render );
transformControl = new THREE.TransformControls( camera, renderer.domElement );
transformControl.addEventListener( 'change', render );
scene.add( transformControl );
// Hiding transform situation is a little in a mess :()
transformControl.addEventListener( 'change', function( e ) {
cancelHideTransorm();
} );
transformControl.addEventListener( 'mouseDown', function( e ) {
cancelHideTransorm();
} );
transformControl.addEventListener( 'mouseUp', function( e ) {
delayHideTransform();
} );
transformControl.addEventListener( 'objectChange', function( e ) {
updateSplineOutline();
} );
var dragcontrols = new THREE.DragControls( camera, splineHelperObjects, renderer.domElement ); //
dragcontrols.on( 'hoveron', function( e ) {
transformControl.attach( e.object );
cancelHideTransorm(); // *
} )
dragcontrols.on( 'hoveroff', function( e ) {
if ( e ) delayHideTransform();
} )
controls.addEventListener( 'start', function() {
cancelHideTransorm();
} );
controls.addEventListener( 'end', function() {
delayHideTransform();
} );
var hiding;
function delayHideTransform() {
cancelHideTransorm();
hideTransform();
}
function hideTransform() {
hiding = setTimeout( function() {
transformControl.detach( transformControl.object );
}, 2500 )
}
function cancelHideTransorm() {
if ( hiding ) clearTimeout( hiding );
}
/*******
* Curves
*********/
var i;
for ( i = 0; i < splinePointsLength; i ++ ) {
addSplineObject( positions[ i ] );
}
positions = [];
for ( i = 0; i < splinePointsLength; i ++ ) {
positions.push( splineHelperObjects[ i ].position );
}
//以上都是增加球状物体
var geometry = new THREE.Geometry();
for ( var i = 0; i < ARC_SEGMENTS; i ++ ) {
geometry.vertices.push( new THREE.Vector3() );
}
var curve;
curve = new THREE.CatmullRomCurve3( positions );
curve.type = 'catmullrom';
curve.mesh = new THREE.Line( geometry.clone(), new THREE.LineBasicMaterial( {
color: 0xff0000,
opacity: 0.35,
linewidth: 2
} ) );
curve.mesh.castShadow = true;
splines.uniform = curve;
curve = new THREE.CatmullRomCurve3( positions );
curve.type = 'centripetal';
curve.mesh = new THREE.Line( geometry.clone(), new THREE.LineBasicMaterial( {
color: 0x00ff00,
opacity: 0.35,
linewidth: 2
} ) );
curve.mesh.castShadow = true;
splines.centripetal = curve;
curve = new THREE.CatmullRomCurve3( positions );
curve.type = 'chordal';
curve.mesh = new THREE.Line( geometry.clone(), new THREE.LineBasicMaterial( {
color: 0x0000ff,
opacity: 0.35,
linewidth: 2
} ) );
curve.mesh.castShadow = true;
splines.chordal = curve;
for ( var k in splines ) {
var spline = splines[ k ];
scene.add( spline.mesh );
}
load( [ new THREE.Vector3( 289.76843686945404, 452.51481137238443, 56.10018915737797 ),
new THREE.Vector3( -53.56300074753207, 171.49711742836848, -14.495472686253045 ),
new THREE.Vector3( -91.40118730204415, 176.4306956436485, -6.958271935582161 ),
new THREE.Vector3( -383.785318791128, 491.1365363371675, 47.869296953772746 ) ] );
}
function addSplineObject( position ) {
var object = new THREE.Mesh( geometry, new THREE.MeshLambertMaterial( {
color: Math.random() * 0xffffff
} ) );
object.material.ambient = object.material.color;
if ( position ) {
object.position.copy( position );
} else {
object.position.x = Math.random() * 1000 - 500;
object.position.y = Math.random() * 600
object.position.z = Math.random() * 800 - 400;
}
object.castShadow = true;
object.receiveShadow = true;
scene.add( object );
splineHelperObjects.push( object );
return object;
}
function addPoint() {
splinePointsLength ++;
positions.push( addSplineObject()
.position );
updateSplineOutline();
}
function removePoint() {
if ( splinePointsLength <= 4 ) {
return;
}
splinePointsLength --;
positions.pop();
scene.remove( splineHelperObjects.pop() );
updateSplineOutline();
}
function updateSplineOutline() {
var p;
for ( var k in splines ) {
var spline = splines[ k ];
splineMesh = spline.mesh;
for ( var i = 0; i < ARC_SEGMENTS; i ++ ) {
p = splineMesh.geometry.vertices[ i ];
p.copy( spline.getPoint( i / ( ARC_SEGMENTS - 1 ) ) );
}
splineMesh.geometry.verticesNeedUpdate = true;
}
}
function exportSpline() {
var p;
var strplace = [];
for ( i = 0; i < splinePointsLength; i ++ ) {
p = splineHelperObjects[ i ].position;
strplace.push( 'new THREE.Vector3({0}, {1}, {2})'.format( p.x, p.y, p.z ) )
}
console.log( strplace.join( ',\n' ) );
var code = '[' + ( strplace.join( ',\n\t' ) ) + ']';
prompt( 'copy and paste code', code );
}
function load( new_positions ) {
while ( new_positions.length > positions.length ) {
addPoint();
}
while ( new_positions.length < positions.length ) {
removePoint();
}
for ( i = 0; i < positions.length; i ++ ) {
positions[ i ].copy( new_positions[ i ] );
}
updateSplineOutline();
}
function animate() {
requestAnimationFrame( animate );
render();
stats.update();
controls.update();
transformControl.update();
}
function render() {
splines.uniform.mesh.visible = uniform.checked;
splines.centripetal.mesh.visible = centripetal.checked;
splines.chordal.mesh.visible = chordal.checked;
renderer.render( scene, camera );
}
</script>
</body>
</html>