| <?php |
| /** |
| * File containing the ezcGraphRotation class |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| * @package Graph |
| * @version //autogentag// |
| * @copyright Copyright (C) 2005-2010 eZ Systems AS. All rights reserved. |
| * @license http://www.apache.org/licenses/LICENSE-2.0 Apache License, Version 2.0 |
| * @access private |
| */ |
| /** |
| * Class to create rotation matrices from given rotation and center point |
| * |
| * Three dimensional matrices (3x3) may be used to specify transformation of |
| * points, vectors and complexer structures in a two dimensional cartesian |
| * coordinate system. For more details have a look here: |
| * http://en.wikipedia.org/wiki/Transformation_matrix |
| * |
| * This class implements a convenient interface to create matrixes to rotate |
| * elements. This matrix may be combined with other transformation matrices, as |
| * usual. |
| * |
| * @version //autogentag// |
| * @package Graph |
| * @access private |
| */ |
| class ezcGraphRotation extends ezcGraphTransformation |
| { |
| /** |
| * Rotation in degrees |
| * |
| * @var float |
| */ |
| protected $rotation; |
| |
| /** |
| * Center point |
| * |
| * @var ezcGraphCoordinate |
| */ |
| protected $center; |
| |
| /** |
| * Construct rotation matrix from rotation (in degrees) and optional |
| * center point. |
| * |
| * @param int $rotation |
| * @param ezcGraphCoordinate $center |
| * @return ezcGraphTransformation |
| */ |
| public function __construct( $rotation = 0, ezcGraphCoordinate $center = null ) |
| { |
| $this->rotation = (float) $rotation; |
| |
| if ( $center === null ) |
| { |
| $this->center = new ezcGraphCoordinate( 0, 0 ); |
| |
| $clockwiseRotation = deg2rad( $rotation ); |
| $rotationMatrixArray = array( |
| array( cos( $clockwiseRotation ), -sin( $clockwiseRotation ), 0 ), |
| array( sin( $clockwiseRotation ), cos( $clockwiseRotation ), 0 ), |
| array( 0, 0, 1 ), |
| ); |
| |
| return parent::__construct( $rotationMatrixArray ); |
| } |
| |
| parent::__construct(); |
| |
| $this->center = $center; |
| |
| $this->multiply( new ezcGraphTranslation( $center->x, $center->y ) ); |
| $this->multiply( new ezcGraphRotation( $rotation ) ); |
| $this->multiply( new ezcGraphTranslation( -$center->x, -$center->y ) ); |
| } |
| |
| /** |
| * Return rotaion angle in degrees |
| * |
| * @return float |
| */ |
| public function getRotation() |
| { |
| return $this->rotation; |
| } |
| |
| /** |
| * Return the center point of the current rotation |
| * |
| * @return ezcGraphCoordinate |
| */ |
| public function getCenter() |
| { |
| return $this->center; |
| } |
| } |
| |
| ?> |