source: other-projects/playing-in-the-street/summer-2013/trunk/Playing-in-the-Street-WPF/Content/Web/mrdoob-three.js-4862f5f/src/cameras/Camera.js@ 28897

/**
 * @author mrdoob / http://mrdoob.com/
 * @author mikael emtinger / http://gomo.se/
 * @author WestLangley / http://github.com/WestLangley
*/

THREE.Camera = function () {

    THREE.Object3D.call( this );

    this.matrixWorldInverse = new THREE.Matrix4();
    this.projectionMatrix = new THREE.Matrix4();

};

THREE.Camera.prototype = Object.create( THREE.Object3D.prototype );

THREE.Camera.prototype.lookAt = function () {

    // This routine does not support cameras with rotated and/or translated parent(s)

    var m1 = new THREE.Matrix4();

    return function ( vector ) {

        m1.lookAt( this.position, vector, this.up );

        this.quaternion.setFromRotationMatrix( m1 );

    };

}();

THREE.Camera.prototype.clone = function (camera) {

    if ( camera === undefined ) camera = new THREE.Camera();

    THREE.Object3D.prototype.clone.call( this, camera );

    camera.matrixWorldInverse.copy( this.matrixWorldInverse );
    camera.projectionMatrix.copy( this.projectionMatrix );

    return camera;
};