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POthree.js rotate camera in plane
 

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    <p>I have a camera in my app: </p> <pre><code>camera = new THREE.PerspectiveCamera( 75, window.innerWidth / window.innerHeight, 0.1, 1000 ); camera.position.z = 1; camera.position.y = -5; camera.rotateOnAxis(new THREE.Vector3(1, 0, 0), degInRad(90)); camera.up = new THREE.Vector3(0, 0, 1); </code></pre> <p>Those code in <code>render</code> function must rotate the camera while I'm pressing the keys: </p> <pre><code>if (leftPressed) { camera.rotateOnAxis((new THREE.Vector3(0, 1, 0)).normalize(), degInRad(1)); } else if (rightPressed) { camera.rotateOnAxis((new THREE.Vector3(0, 1, 0)).normalize(), degInRad(-1)); } if (upPressed) { camera.rotateOnAxis((new THREE.Vector3(1, 0, 0)).normalize(), degInRad(1)); } else if (downPressed) { camera.rotateOnAxis((new THREE.Vector3(1, 0, 0)).normalize(), degInRad(-1)); } </code></pre> <p>Camera rotates, but not in way I need. I want that camera rotates like in FPS (first person shooter) on plane. See picture to understand what I want...<br> I'm try to use <code>sin(1)</code> and <code>cos(1)</code> but can't understand how <code>rotateOnAxis</code> works, cause <code>translate</code> functions work like a charm and moves camera in direction in what she sees.<br> <strong>P.S.</strong><br> Here is a <a href="http://threejs.org/docs/" rel="nofollow noreferrer">docs</a> to the <code>three.js</code> maybe it helps.<br> To handle keyboard events I use <a href="http://robertwhurst.github.io/KeyboardJS/" rel="nofollow noreferrer">KeyboardJS</a><br> And here is a <code>degInRad</code> function: </p> <pre><code>function degInRad(deg) { return deg * Math.PI / 180; } </code></pre> <p>Link on <a href="http://jsfiddle.net/ostapische/uFwFC/" rel="nofollow noreferrer">JSFiddle</a> </p> <p><img src="https://i.stack.imgur.com/cvC1j.jpg" alt="camera rotation"></p> <p><code>O</code> - position of camera<br> <code>O-O1</code> - current camera direction<br> <code>R1</code> - current rotation direction<br> <code>R</code> - direction what I want<br> Sorry for <em>good</em> picture.</p>
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    1. COConsider, instead, using/modifying, `THREE.PointerLockControls`. See http://threejs.org/examples/misc_controls_pointerlock.html. Note in the pointer-lock source code how the camera is added as a child/grandchild of 2 objects to achieve the effect you want.
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    2. CO@WestLangley, it's nice link, thanks, but I don't need to move camera with mouse. And `camera` uses only in `controls = new THREE.PointerLockControls( camera ); scene.add( controls.getObject() );` - it's `PointerLockControls` inner object adds to scene, not `camera` itself and in `onWindowResize` function - just applying new properties, and in `renderer.render( scene, camera );` - here is using original `camera` variable. About what `child/grandchild` You talk? I really can't understand, can You explain? Thanks in advance.
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    3. CONotice how `PointerLockControls` rotates the camera as you desire, except it uses the mouse, instead of the keyboard. To get that effect, it uses the `pitchObject` and `yawObject` technique. See the source code. That is what I meant by `child/grandchild`. You do not have to use the `PointerLockControls`; you can implement similar logic yourself.
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