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parabolic-path.html
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parabolic-path.html
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<!DOCTYPE html>
<head>
<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
<title>Hello, world!</title>
<!-- include three.js library -->
<script src='js/three.js'></script>
<!-- include jsartookit -->
<script src="jsartoolkit5/artoolkit.min.js"></script>
<script src="jsartoolkit5/artoolkit.api.js"></script>
<!-- include threex.artoolkit -->
<script src="threex/threex-artoolkitsource.js"></script>
<script src="threex/threex-artoolkitcontext.js"></script>
<script src="threex/threex-arbasecontrols.js"></script>
<script src="threex/threex-armarkercontrols.js"></script>
</head>
<body style='margin : 0px; overflow: hidden; font-family: Monospace;'>
<!--
Example created by Lee Stemkoski: https://github.com/stemkoski
Based on the AR.js library and examples created by Jerome Etienne: https://github.com/jeromeetienne/AR.js/
-->
<script>
var scene, camera, renderer, clock, deltaTime, totalTime;
var arToolkitSource, arToolkitContext;
var markerRoot1;
var material1, mesh1;
initialize();
animate();
function initialize()
{
scene = new THREE.Scene();
camera = new THREE.Camera();
scene.add(camera);
renderer = new THREE.WebGLRenderer({
antialias : true,
alpha: true
});
renderer.setClearColor(new THREE.Color('lightgrey'), 0)
renderer.setSize( 640, 480 );
renderer.domElement.style.position = 'absolute'
renderer.domElement.style.top = '0px'
renderer.domElement.style.left = '0px'
document.body.appendChild( renderer.domElement );
clock = new THREE.Clock();
deltaTime = 0;
totalTime = 0;
////////////////////////////////////////////////////////////
// setup arToolkitSource
////////////////////////////////////////////////////////////
arToolkitSource = new THREEx.ArToolkitSource({
sourceType : 'webcam',
});
function onResize()
{
arToolkitSource.onResize()
arToolkitSource.copySizeTo(renderer.domElement)
if ( arToolkitContext.arController !== null )
{
arToolkitSource.copySizeTo(arToolkitContext.arController.canvas)
}
}
arToolkitSource.init(function onReady(){
onResize()
});
// handle resize event
window.addEventListener('resize', function(){
onResize()
});
////////////////////////////////////////////////////////////
// setup arToolkitContext
////////////////////////////////////////////////////////////
// create atToolkitContext
arToolkitContext = new THREEx.ArToolkitContext({
cameraParametersUrl: 'data/camera_para.dat',
detectionMode: 'mono'
});
// copy projection matrix to camera when initialization complete
arToolkitContext.init( function onCompleted(){
camera.projectionMatrix.copy( arToolkitContext.getProjectionMatrix() );
});
////////////////////////////////////////////////////////////
// setup markerRoots
////////////////////////////////////////////////////////////
// build markerControls
markerRootA = new THREE.Group();
scene.add(markerRootA);
let markerControls1 = new THREEx.ArMarkerControls(arToolkitContext, markerRootA, {
type: 'pattern', patternUrl: "data/letterA.patt",
});
markerRootB = new THREE.Group();
scene.add(markerRootB);
let markerControls2 = new THREEx.ArMarkerControls(arToolkitContext, markerRootB, {
type: 'pattern', patternUrl: "data/letterB.patt",
});
////////////////////////////////////////////////////////////
// setup scene
////////////////////////////////////////////////////////////
renderer.shadowMap.enabled = true;
renderer.shadowMap.type = THREE.PCFSoftShadowMap;
let loader = new THREE.TextureLoader();
sceneGroup = new THREE.Group();
markerRootA.add(sceneGroup);
let floorGeometry = new THREE.PlaneGeometry( 20,20 );
let floorMaterial = new THREE.ShadowMaterial();
floorMaterial.opacity = 0.3;
let floorMesh = new THREE.Mesh( floorGeometry, floorMaterial );
floorMesh.rotation.x = -Math.PI/2;
floorMesh.receiveShadow = true;
sceneGroup.add( floorMesh );
ballMesh = new THREE.Mesh(
new THREE.SphereGeometry(0.25, 32, 32),
new THREE.MeshLambertMaterial({
map: loader.load("images/basketball-gray.png"),
color: 0xff8800
})
);
ballMesh.castShadow = true;
scene.add( ballMesh );
let light = new THREE.PointLight( 0xffffff, 1, 100 );
light.position.set( 0,4,0 ); // default; light shining from top
light.castShadow = true;
sceneGroup.add( light );
let lightSphere = new THREE.Mesh(
new THREE.SphereGeometry(0.1),
new THREE.MeshBasicMaterial({
color: 0xffffff,
transparent: true,
opacity: 0.8
})
);
lightSphere.position.copy( light.position );
sceneGroup.add( lightSphere );
let ambientLight = new THREE.AmbientLight( 0x666666 );
sceneGroup.add( ambientLight );
// let helper = new THREE.CameraHelper( light.shadow.camera );
// sceneGroup.add( helper );
// default normal of a plane is 0,0,1. Apply mesh rotation to it.
let clipPlane = new THREE.Plane().setFromNormalAndCoplanarPoint(
new THREE.Vector3(0,1,0), new THREE.Vector3(0,0,0) );
renderer.clippingPlanes = [clipPlane];
}
function update()
{
// update artoolkit on every frame
if ( arToolkitSource.ready !== false )
arToolkitContext.update( arToolkitSource.domElement );
if ( markerRootA.visible && markerRootB.visible )
{
// align clipping plane to scene.
renderer.clippingPlanes[0].setFromNormalAndCoplanarPoint(
new THREE.Vector3(0,1,0).applyQuaternion(sceneGroup.getWorldQuaternion()),
sceneGroup.getWorldPosition()
);
let p = parabolicPath( markerRootA.getWorldPosition(), markerRootB.getWorldPosition(), (totalTime/1) % 4 - 1 );
ballMesh.position.copy( p );
ballMesh.rotation.z += 0.1
}
}
// create a function p() that passes through the points (0,p0), (1,p1), (2,p2)
// and evaluate that function at time t.
function parabolaEvaluate(p0, p1, p2, t)
{
return ( 0.5*(p0 - 2*p1 + p2) )*t*t + ( -0.5*(3*p0 - 4*p1 + p2) )*t + ( p0 );
}
function parabolicPath( pointStart, pointEnd, time )
{
let pointMiddle = new THREE.Vector3().addVectors( pointStart, pointEnd ).multiplyScalar(0.5).add( new THREE.Vector3(0,2,0) );
return new THREE.Vector3(
parabolaEvaluate( pointStart.x, pointMiddle.x, pointEnd.x, time ),
parabolaEvaluate( pointStart.y, pointMiddle.y, pointEnd.y, time ),
parabolaEvaluate( pointStart.z, pointMiddle.z, pointEnd.z, time )
);
}
function render()
{
renderer.render( scene, camera );
}
function animate()
{
requestAnimationFrame(animate);
deltaTime = clock.getDelta();
totalTime += deltaTime;
update();
render();
}
</script>
</body>
</html>