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+<!DOCTYPE html>
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+<html lang="en">
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+ <head>
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+ <meta charset="utf-8" />
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+ <base href="../../../" />
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+ <script src="list.js"></script>
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+ <script src="page.js"></script>
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+ <link type="text/css" rel="stylesheet" href="page.css" />
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+ </head>
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+ <body>
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+ [page:EventDispatcher] →
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+
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+ <h1>[name]</h1>
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+
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+ <p class="desc">
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+ [name] is similar to [page:OrbitControls]. However, it does not maintain a constant camera [page:Object3D.up up] vector.
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+ That means if the camera orbits over the “north” and “south” poles, it does not flip to stay "right side up".
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+ </p>
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+
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+ <h2>Example</h2>
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+
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+ <p>[example:misc_controls_trackball misc / controls / trackball ]</p>
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+
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+ <h2>Constructor</h2>
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+
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+ <h3>[name]( [param:Camera camera], [param:HTMLDOMElement domElement] )</h3>
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+ <p>
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+ <p>
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+ [page:Camera camera]: The camera of the rendered scene.
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+ </p>
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+ <p>
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+ [page:HTMLDOMElement domElement]: (optional) The HTML element used for event listeners. By default this is the whole document,
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+ however if you only want the controls to work over a specific element (e.g. the canvas) you can specify that here.
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+ </p>
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+ <p>
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+ Creates a new instance of [name].
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+ </p>
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+ </p>
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+
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+ <h2>Events</h2>
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+
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+ <h3>change</h3>
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+ <p>
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+ Fires when the camera has been transformed by the controls.
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+ </p>
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+
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+ <h3>start</h3>
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+ <p>
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+ Fires when an interaction (e.g. touch) was initiated.
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+ </p>
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+
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+ <h3>end</h3>
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+ <p>
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+ Fires when an interaction has finished.
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+ </p>
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+
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+ <h2>Properties</h2>
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+
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+ <h3>[property:HTMLDOMElement domElement]</h3>
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+ <p>
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+ The HTMLDOMElement used to listen for mouse / touch events. This must be passed in the constructor; changing it here will
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+ not set up new event listeners. Default is the whole document.
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+ </p>
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+
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+ <h3>[property:Number dynamicDampingFactor]</h3>
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+ <p>
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+ Defines the intensity of damping. Only considered if [page:.staticMoving staticMoving] is set to *false*. Default is *0.2*.
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+ </p>
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+
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+ <h3>[property:Boolean enabled]</h3>
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+ <p>
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+ Whether or not the controls are enabled.
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+ </p>
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+
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+ <h3>[property:Array keys]</h3>
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+ <p>
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+ This array holds keycodes for controlling interactions.
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+ <ul>
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+ <li>When the first defined key is pressed, all mouse interactions (left, middle, right) performs orbiting.</li>
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+ <li>When the second defined key is pressed, all mouse interactions (left, middle, right) performs zooming.</li>
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+ <li>When the third defined key is pressed, all mouse interactions (left, middle, right) performs panning.</li>
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+ </ul>
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+ Default is *65, 83, 68* which represents A, S, D.
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+ </p>
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+
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+ <h3>[property:Number maxDistance]</h3>
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+ <p>
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+ How far you can zoom in. Default is *Infinity*.
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+ </p>
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+
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+ <h3>[property:Number minDistance]</h3>
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+ <p>
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+ How far you can zoom in. Default is *0*.
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+ </p>
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+
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+ <h3>
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+ [property:Object mouseButtons]</h3>
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+ <p>
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+ This object contains references to the mouse actions used by the controls.
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+ <ul>
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+ <li>.LEFT is assinged with *THREE.MOUSE.ROTATE*</li>
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+ <li>.MIDDLE is assinged with *THREE.MOUSE.ZOOM*</li>
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+ <li>.RIGHT is assinged with *THREE.MOUSE.PAN*</li>
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+ </ul>
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+ </p>
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+
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+ <h3>[property:Boolean noPan]</h3>
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+ <p>
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+ Whether or not panning is disabled. Default is *false*.
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+ </p>
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+
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+ <h3>[property:Boolean noRotate]</h3>
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+ <p>
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+ Whether or not rotation is disabled. Default is *false*.
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+ </p>
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+
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+ <h3>[property:Boolean noZoom]</h3>
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+ <p>
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+ Whether or not zooming is disabled. Default is *false*.
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+ </p>
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+
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+ <h3>[property:Camera object]</h3>
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+ <p>
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+ The camera being controlled.
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+ </p>
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+
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+ <h3>[property:Number panSpeed]</h3>
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+ <p>
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+ The zoom speed. Default is *0.3*.
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+ </p>
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+
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+ <h3>[property:Number rotateSpeed]</h3>
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+ <p>
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+ The rotation speed. Default is *1.0*.
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+ </p>
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+
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+ <h3>[property:Object screen]</h3>
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+ <p>
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+ Represents the properties of the screen. Automatically set when [page:.handleResize handleResize]() is called.
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+ <ul>
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+ <li>left: Represents the offset in pixels to the screen's left boundary.</li>
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+ <li>top: Represents the offset in pixels to the screen's top boundary.</li>
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+ <li>width: Represents the screen width in pixels.</li>
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+ <li>height: Represents the screen height in pixels.</li>
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+ </ul>
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+ </p>
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+
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+ <h3>[property:Boolean staticMoving]</h3>
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+ <p>
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+ Whether or not damping is disabled. Default is *false*.
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+ </p>
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+
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+ <h3>[property:Number zoomSpeed]</h3>
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+ <p>
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+ The zoom speed. Default is *1.2*.
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+ </p>
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+
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+ <h2>Methods</h2>
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+
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+ <h3>[method:null checkDistances] ()</h3>
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+ <p>
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+ Ensures the controls stay in the range [minDistance, maxDistance]. Called by [page:.update update]().
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+ </p>
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+
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+ <h3>[method:null dispose] ()</h3>
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+ <p>
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+ Should be called if the controls is no longer required.
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+ </p>
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+
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+ <h3>[method:null handleResize] ()</h3>
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+ <p>
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+ Should be called if the application window is resized.
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+ </p>
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+
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+ <h3>[method:null panCamera] ()</h3>
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+ <p>
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+ Performs panning if necessary. Called by [page:.update update]().
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+ </p>
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+
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+ <h3>[method:null reset] ()</h3>
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+ <p>
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+ Resets the controls to its initial state.
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+ </p>
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+
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+ <h3>[method:null rotateCamera] ()</h3>
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+ <p>
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+ Rotates the camera if necessary. Called by [page:.update update]().
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+ </p>
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+
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+ <h3>[method:null update] ()</h3>
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+ <p>
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+ Updates the controls. Usually called in the animation loop.
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+ </p>
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+
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+ <h3>[method:null zoomCamera] ()</h3>
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+ <p>
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+ Performs zooming if necessary. Called by [page:.update update]().
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+ </p>
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+
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+ <h2>Source</h2>
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+
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+ <p>
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+ [link:https://github.com/mrdoob/three.js/blob/master/examples/js/controls/TrackballControls.js examples/js/controls/TrackballControls.js]
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+ </p>
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+ </body>
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+</html>
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Mugen87