Doodle3D-Slicer/three.js-master/examples/js/controls/DeviceOrientationControls.js

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2015-06-12 15:58:26 +02:00
/**
* @author richt / http://richt.me
* @author WestLangley / http://github.com/WestLangley
*
* W3C Device Orientation control (http://w3c.github.io/deviceorientation/spec-source-orientation.html)
*/
THREE.DeviceOrientationControls = function ( object ) {
var scope = this;
this.object = object;
this.object.rotation.reorder( "YXZ" );
this.enabled = true;
this.deviceOrientation = {};
this.screenOrientation = 0;
var onDeviceOrientationChangeEvent = function ( event ) {
scope.deviceOrientation = event;
};
var onScreenOrientationChangeEvent = function () {
scope.screenOrientation = window.orientation || 0;
};
// The angles alpha, beta and gamma form a set of intrinsic Tait-Bryan angles of type Z-X'-Y''
var setObjectQuaternion = function () {
var zee = new THREE.Vector3( 0, 0, 1 );
var euler = new THREE.Euler();
var q0 = new THREE.Quaternion();
var q1 = new THREE.Quaternion( - Math.sqrt( 0.5 ), 0, 0, Math.sqrt( 0.5 ) ); // - PI/2 around the x-axis
return function ( quaternion, alpha, beta, gamma, orient ) {
euler.set( beta, alpha, - gamma, 'YXZ' ); // 'ZXY' for the device, but 'YXZ' for us
quaternion.setFromEuler( euler ); // orient the device
quaternion.multiply( q1 ); // camera looks out the back of the device, not the top
quaternion.multiply( q0.setFromAxisAngle( zee, - orient ) ); // adjust for screen orientation
}
}();
this.connect = function() {
onScreenOrientationChangeEvent(); // run once on load
window.addEventListener( 'orientationchange', onScreenOrientationChangeEvent, false );
window.addEventListener( 'deviceorientation', onDeviceOrientationChangeEvent, false );
scope.enabled = true;
};
this.disconnect = function() {
window.removeEventListener( 'orientationchange', onScreenOrientationChangeEvent, false );
window.removeEventListener( 'deviceorientation', onDeviceOrientationChangeEvent, false );
scope.enabled = false;
};
this.update = function () {
if ( scope.enabled === false ) return;
var alpha = scope.deviceOrientation.alpha ? THREE.Math.degToRad( scope.deviceOrientation.alpha ) : 0; // Z
var beta = scope.deviceOrientation.beta ? THREE.Math.degToRad( scope.deviceOrientation.beta ) : 0; // X'
var gamma = scope.deviceOrientation.gamma ? THREE.Math.degToRad( scope.deviceOrientation.gamma ) : 0; // Y''
var orient = scope.screenOrientation ? THREE.Math.degToRad( scope.screenOrientation ) : 0; // O
setObjectQuaternion( scope.object.quaternion, alpha, beta, gamma, orient );
};
this.connect();
};