three.js/docs/api/cameras/PerspectiveCamera.html

<h1>PerspectiveCamera &larr; <a href="javascript:goTo('cameras/Camera')">Camera</a> &larr; <a href="javascript:goTo('core/Object3D')">Object3D</a></h1>

<div>Camera with perspective projection.</div>

<h2>Example</h2>

<code>var camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 1, 1000 );
scene.add( camera );
</code>

<h2>Constructor</h2>

<h3>PerspectiveCamera( fov <a href="javascript:goTo('core/Number')">Number</a>, aspect <a href="javascript:goTo('core/Number')">Number</a>, near <a href="javascript:goTo('core/Number')">Number</a>, far <a href="javascript:goTo('core/Number')">Number</a> )</h3>


<h2>Properties</h2>

<h3>fov <a href="javascript:goTo('core/Number')">Number</a></h3>
<div>Camera frustum vertical field of view.</div>

<h3>aspect <a href="javascript:goTo('core/Number')">Number</a></h3>
<div>Camera frustum aspect ratio.</div>

<h3>near <a href="javascript:goTo('core/Number')">Number</a></h3>
<div>Camera frustum near plane.</div>

<h3>far <a href="javascript:goTo('core/Number')">Number</a></h3>
<div>Camera frustum far plane.</div>


<h2>Methods</h2>

<h3>setLens( focalLength <a href="javascript:goTo('core/Number')">Number</a>, frameSize <a href="javascript:goTo('core/Number')">Number</a> )</h3>
<div>
Uses focal length (in mm) to estimate and set FOV 35mm (fullframe) camera is used if frame size is not specified.<br />
Formula based on <a href="http://www.bobatkins.com/photography/technical/field_of_view.html" target="_blank">http://www.bobatkins.com/photography/technical/field_of_view.html</a>
</div>

<h3>setViewOffset( fullWidth <a href="javascript:goTo('core/Number')">Number</a>, fullHeight <a href="javascript:goTo('core/Number')">Number</a>, x <a href="javascript:goTo('core/Number')">Number</a>, y <a href="javascript:goTo('core/Number')">Number</a>, width <a href="javascript:goTo('core/Number')">Number</a>, height <a href="javascript:goTo('core/Number')">Number</a> )</h3>
<div>
Sets an offset in a larger frustum. This is useful for multi-window or multi-monitor/multi-machine setups.<br /><br />

For example, if you have 3x2 monitors and each monitor is 1920x1080 and the monitors are in grid like this:<br /><br />

<pre>+---+---+---+
| A | B | C |
+---+---+---+
| D | E | F |
+---+---+---+
</pre>

then for each monitor you would call it like this:<br /><br />

<code>var w = 1920;
var h = 1080;
var fullWidth = w * 3;
var fullHeight = h * 2;

// --A--
camera.setOffset( fullWidth, fullHeight, w * 0, h * 0, w, h );
//--B--
camera.setOffset( fullWidth, fullHeight, w * 1, h * 0, w, h );
//--C--
camera.setOffset( fullWidth, fullHeight, w * 2, h * 0, w, h );
//--D--
camera.setOffset( fullWidth, fullHeight, w * 0, h * 1, w, h );
//--E--
camera.setOffset( fullWidth, fullHeight, w * 1, h * 1, w, h );
//--F--
camera.setOffset( fullWidth, fullHeight, w * 2, h * 1, w, h );
</code><br />

Note there is no reason monitors have to be the same size or in a grid.
</div>

<h3>updateProjectionMatrix()</h3>
<div>
Updates camera's projection matrix. Must be called after change of parameters.
</div>

<h2>Source</h2>

<div><a href="https://github.com/mrdoob/three.js/blob/master/src/cameras/PerspectiveCamera.js" target="_blank">src/cameras/PerspectiveCamera.js</a></div>