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The three.js canvas is a 500 x 500 square inside a larger web page with other content and I need mouse control of the camera (for zooming and rotating around the object) to only happen when the mouse is inside the 500 x 500 square.
Also, I am unable to scroll the web page but maybe that will be fixed when we isolate the mouse event listener to the 500 x 500 canvas.
Current code:
<!DOCTYPE html>
<html>
<head>
<style>
div {
position:relative;
left:100px;
top:100px;
background-color: #eeeeee;
border:1px solid black;
width:500px;
height:500px;
}
canvas {
width:500px;
height:500px;
}
</style>
</head>
<body>
<script src="https://raw.github.com/mrdoob/three.js/master/build/three.min.js"></script>
<script src="https://raw.github.com/mrdoob/three.js/master/examples/js/loaders/STLLoader.js"></script>
<script src="https://raw.github.com/mrdoob/three.js/master/examples/js/controls/TrackballControls.js"></script>
<script>
var container, camera, scene, renderer, controls;
init();
animate();
function init() {
container = document.createElement( 'div' );
document.body.appendChild( container );
var width = container.clientWidth;
var height = container.clientHeight;
camera = new THREE.PerspectiveCamera( 10 , width / height , .1 , 10000 );
camera.position.set( 0, 0, 10);
scene = new THREE.Scene();
controls = new THREE.TrackballControls( camera ); // mouse control
controls.addEventListener( 'change', render ); // mouse control
// object
var loader = new THREE.STLLoader();
loader.addEventListener( 'load', function ( event ) {
var geometry = event.content;
var material = new THREE.MeshLambertMaterial( { ambient: 0xff5533, color: 0xff5533 } );
var mesh = new THREE.Mesh( geometry, material );
scene.add( mesh );
} );
loader.load( 'slotted_disk.stl' ); // from https://raw.github.com/mrdoob/three.js/master/examples/models/stl/slotted_disk.stl
// lights
scene.add( new THREE.AmbientLight( 0x222222 ) );
var directionalLight = new THREE.DirectionalLight( 0xffffff, 1 );
directionalLight.position = camera.position;
scene.add( directionalLight );
// renderer
renderer = new THREE.WebGLRenderer( { antialias: true } );
renderer.setSize( width , height );
container.appendChild( renderer.domElement );
window.addEventListener( 'resize', onWindowResize, false );
}
function addLight( x, y, z, color, intensity ) {
var directionalLight = new THREE.DirectionalLight( color, intensity );
directionalLight.position.set( x, y, z )
scene.add( directionalLight );
}
function onWindowResize() {
camera.aspect = width / height;
camera.updateProjectionMatrix();
renderer.setSize( width, height );
}
function animate() {
requestAnimationFrame( animate );
controls.update();
render();
}
function render() {
camera.lookAt( scene.position );
renderer.render( scene, camera );
}
</script>
</body>
</html>
Most of the controls allow you to specify which DOM node the event listeners are added to. Event handlers are added to document by default, but this should constrain the mouse handling to your container element:
Suggested answer does not work for me, this however does. Hope it helps someone!