javascript
/
three.js
oglindă de https://github.com/tazdij/three.js.git


			
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							<!DOCTYPE html>
<html lang="en">
	<head>
		<meta charset="utf-8" />
		<base href="../../../" />
		<script src="page.js"></script>
		<link type="text/css" rel="stylesheet" href="page.css" />
	</head>
	<body>
		[page:EventDispatcher] &rarr;

		<h1>[name]</h1>

		<p class="desc">
		Arcball controls allow the camera to be controlled by a virtual trackball with full touch support and advanced navigation functionality. <br>
		Cursor/finger positions and movements are mapped over a virtual trackball surface
		represented by a gizmo and mapped in intuitive and consistent camera movements.
		Dragging cursor/fingers will cause camera to orbit around the center of the trackball in a conservative way (returning to the starting point
		will make the camera to return to its starting orientation).<br><br>

		In addition to supporting pan, zoom and pinch gestures, Arcball controls provide <i>focus</i> functionality with a double click/tap for
		intuitively moving the object's point of interest in the center of the virtual trackball.
		Focus allows a much better inspection and navigation in complex environment.
		Moreover Arcball controls allow FOV manipulation (in a vertigo-style method) and z-rotation.
		Saving and restoring of Camera State is supported also through clipboard
		(use ctrl+c and ctrl+v shortcuts for copy and paste the state).<br><br>

		Unlike [page:OrbitControls] and [page:TrackballControls], [name] doesn't require [page:.update] to be called externally in an animation loop when animations
		are on.<br><br>


		To use this, as with all files in the /examples directory, you will have to
		include the file separately in your HTML.
		</p>

		<h2>Import</h2>

		<p>
			[name] is an add-on, and must be imported explicitly.
			See [link:#manual/introduction/Installation Installation / Addons].
		</p>

		<code>
			import { ArcballControls } from 'three/addons/controls/ArcballControls.js';
		</code>

		<h2>Code Example</h2>

		<code>
		const renderer = new THREE.WebGLRenderer();
		renderer.setSize( window.innerWidth, window.innerHeight );
		document.body.appendChild( renderer.domElement );

		const scene = new THREE.Scene();

		const camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 1, 10000 );

		const controls = new ArcballControls( camera, renderer.domElement, scene );

		controls.addEventListener( 'change', function () {

			renderer.render( scene, camera );

		} );

		//controls.update() must be called after any manual changes to the camera's transform
		camera.position.set( 0, 20, 100 );
		controls.update();
		</code>

		<h2>Examples</h2>

		<p>[example:misc_controls_arcball misc / controls / arcball ]</p>

		<h2>Constructor</h2>

		<h3>[name]( [param:Camera camera], [param:HTMLDOMElement domElement], [param:Scene scene] )</h3>
		<p>
			[page:Camera camera]: (required) The camera to be controlled. The camera must not be a child of another object, unless that object is the scene itself.<br><br>

			[page:HTMLDOMElement domElement]: The HTML element used for event listeners.<br><br>

			[page:Scene scene]: The scene rendered by the camera. If not given, gizmos cannot be shown.
		</p>

		<h2>Events</h2>

		<h3>change</h3>
		<p>
			Fires when the camera has been transformed by the controls.
		</p>

		<h3>start</h3>
		<p>
			Fires when an interaction was initiated.
		</p>

		<h3>end</h3>
		<p>
			Fires when an interaction has finished.
		</p>

		<h2>Properties</h2>

		<h3>[property:Boolean adjustNearFar]</h3>
		<p>
			If true, camera's near and far values will be adjusted every time zoom is performed trying to mantain the same visible portion
			given by initial near and far values ( [page:PerspectiveCamera] only ).
			Default is false.
		</p>

		<h3>[property:Camera camera]</h3>
		<p>
			The camera being controlled.
		</p>

		<h3>[property:Boolean cursorZoom]</h3>
		<p>
			Set to true to make zoom become cursor centered.
		</p>

		<h3>
			[property:Float dampingFactor]</h3>
		<p>
			The damping inertia used if [page:.enableAnimations] is set to true.
		</p>

		<h3>[property:HTMLDOMElement domElement]</h3>
		<p>
			The HTMLDOMElement used to listen for mouse / touch events. This must be passed in the constructor; changing it here will
			not set up new event listeners.
		</p>

		<h3>[property:Boolean enabled]</h3>
		<p>
			When set to `false`, the controls will not respond to user input. Default is `true`.
		</p>

		<h3>[property:Boolean enableAnimations]</h3>
		<p>
			Set to true to enable animations for rotation (damping) and focus operation. Default is true.
		</p>

		<h3>[property:Boolean enableGrid]</h3>
		<p>
			When set to true, a grid will appear when panning operation is being performed (desktop interaction only). Default is false.
		</p>

		<h3>[property:Boolean enablePan]</h3>
		<p>
			Enable or disable camera panning. Default is true.
		</p>

		<h3>[property:Boolean enableRotate]</h3>
		<p>
			Enable or disable camera rotation. Default is true.
		</p>

		<h3>[property:Boolean enableZoom]</h3>
		<p>
			Enable or disable zooming of the camera.
		</p>

		<h3>[property:Float focusAnimationTime]</h3>
		<p>
			Duration time of focus animation.
		</p>

		<h3>[property:Float maxDistance]</h3>
		<p>
			How far you can dolly out ( [page:PerspectiveCamera] only ). Default is Infinity.
		</p>

		<h3>[property:Float maxZoom]</h3>
		<p>
			How far you can zoom out ( [page:OrthographicCamera] only ). Default is Infinity.
		</p>

		<h3>[property:Float minDistance]</h3>
		<p>
			 How far you can dolly in ( [page:PerspectiveCamera] only ). Default is 0.
		</p>

		<h3>[property:Float minZoom]</h3>
		<p>
			How far you can zoom in ( [page:OrthographicCamera] only ). Default is 0.
		</p>

		<h3>[property:Float radiusFactor]</h3>
		<p>
			The size of the gizmo relative to the screen width and height. Default is 0.67.
		</p>

		<h3>[property:Float rotateSpeed]</h3>
		<p>
			Speed of rotation. Default is 1.
		</p>

		<h3>[property:Float scaleFactor]</h3>
		<p>
			The scaling factor used when performing zoom operation.
		</p>

		<h3>[property:Scene scene]</h3>
		<p>
			The scene rendered by the camera.
		</p>

		<h3>[property:Float wMax]</h3>
		<p>
			Maximum angular velocity allowed on rotation animation start.
		</p>


		<h2>Methods</h2>

		<h3>[method:undefined activateGizmos] ( [param:Boolean isActive] )</h3>
		<p>
			Make gizmos more or less visible.
		</p>

		<h3>[method:undefined copyState] ()</h3>
		<p>
			Copy the current state to clipboard (as a readable JSON text).
		</p>

		<h3>[method:undefined dispose] ()</h3>
		<p>
			Remove all the event listeners, cancel any pending animation and clean the scene from gizmos and grid.
		</p>

		<h3>[method:undefined pasteState] ()</h3>
		<p>
			Set the controls state from the clipboard, assumes that the clipboard stores a JSON text as saved from [page:.copyState].
		</p>

		<h3>[method:undefined reset] ()</h3>
		<p>
			Reset the controls to their state from either the last time the [page:.saveState] was called, or the initial state.
		</p>

		<h3>[method:undefined saveState] ()</h3>
		<p>
			Save the current state of the controls. This can later be recovered with [page:.reset].
		</p>

		<h3>[method:undefined setCamera] ( [param:Camera camera] )</h3>
		<p>
			Set the camera to be controlled. Must be called in order to set a new camera to be controlled.
		</p>

		<h3>[method:undefined setGizmosVisible] ( [param:Boolean value] )</h3>
		<p>
			Set the visible property of gizmos.
		</p>

		<h3>[method:undefined setTbRadius] ( [param:Float value] )</h3>
		<p>
			Update the `radiusFactor` value, redraw the gizmo and send a `changeEvent` to visualise the changes.
		</p>

		<h3>[method:Boolean setMouseAction] ( [param:String operation], mouse, key )</h3>
		<p>
			Set a new mouse action by specifying the operation to be performed and a mouse/key combination. In case of conflict, replaces the existing one.<br><br>
			Operations can be specified as 'ROTATE', 'PAN', 'FOV' or 'ZOOM'.<br>
			Mouse inputs can be specified as mouse buttons 0, 1 and 2 or 'WHEEL' for wheel notches.<br>
			Keyboard modifiers can be specified as 'CTRL', 'SHIFT' or null if not needed.
		</p>

		<h3>[method:Boolean unsetMouseAction] ( mouse, key )</h3>
		<p>
			Removes a mouse action by specifying its mouse/key combination.<br><br>
			Mouse inputs can be specified as mouse buttons 0, 1 and 2 or 'WHEEL' for wheel notches.<br>
			Keyboard modifiers can be specified as 'CTRL', 'SHIFT' or null if not needed.
		</p>

		<h3>[method:undefined update] ()</h3>
		<p>
			Update the controls. Must be called after any manual changes to the camera's transform.
		</p>

		<h3>[method:Raycaster getRaycaster] ()</h3>
		<p>
			Returns the [page:Raycaster] object that is used for user interaction. This object is shared between all instances of
			ArcballControls. If you set the [page:Object3D.layers .layers] property of the [name], you will also want to
			set the [page:Raycaster.layers .layers] property on the [page:Raycaster] with a matching value, or else the [name]
			won't work as expected.
		</p>

		<h2>Source</h2>

		<p>
			[link:https://github.com/mrdoob/three.js/blob/master/examples/jsm/controls/ArcballControls.js examples/jsm/controls/ArcballControls.js]
		</p>
	</body>
</html>