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Diffstat (limited to 'config/archive/dspam/pear/Image/Graph/Plot/Smoothed/Bezier.php')
| -rw-r--r-- | config/archive/dspam/pear/Image/Graph/Plot/Smoothed/Bezier.php | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/config/archive/dspam/pear/Image/Graph/Plot/Smoothed/Bezier.php b/config/archive/dspam/pear/Image/Graph/Plot/Smoothed/Bezier.php new file mode 100644 index 00000000..bc21b4c8 --- /dev/null +++ b/config/archive/dspam/pear/Image/Graph/Plot/Smoothed/Bezier.php @@ -0,0 +1,173 @@ +<?php + +/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */ + +/** + * Image_Graph - PEAR PHP OO Graph Rendering Utility. + * + * PHP versions 4 and 5 + * + * LICENSE: This library is free software; you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License as published by + * the Free Software Foundation; either version 2.1 of the License, or (at your + * option) any later version. This library is distributed in the hope that it + * will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser + * General Public License for more details. You should have received a copy of + * the GNU Lesser General Public License along with this library; if not, write + * to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + * 02111-1307 USA + * + * @category Images + * @package Image_Graph + * @subpackage Plot + * @author Jesper Veggerby <pear.nosey@veggerby.dk> + * @copyright Copyright (C) 2003, 2004 Jesper Veggerby Hansen + * @license http://www.gnu.org/copyleft/lesser.html LGPL License 2.1 + * @version CVS: $Id$ + * @link http://pear.php.net/package/Image_Graph + */ + +/** + * Include file Image/Graph/Plot.php + */ +require_once 'Image/Graph/Plot.php'; + +/** + * Include file Image/Graph/Tool.php + */ +require_once 'Image/Graph/Tool.php'; + +/** + * Bezier smoothed plottype. + * + * The framework for calculating the Bezier smoothed curve from the dataset. + * Used in {@link Image_Graph_Plot_Smoothed_Line} and {@link + * Image_Graph_Plot_Smoothed_Area}. Smoothed charts are only supported with non- + * stacked types + * @link http://homepages.borland.com/efg2lab/Graphics/Jean- + * YvesQueinecBezierCurves.htm efg computer lab - description of bezier curves + * + * @category Images + * @package Image_Graph + * @subpackage Plot + * @author Jesper Veggerby <pear.nosey@veggerby.dk> + * @copyright Copyright (C) 2003, 2004 Jesper Veggerby Hansen + * @license http://www.gnu.org/copyleft/lesser.html LGPL License 2.1 + * @version Release: @package_version@ + * @link http://pear.php.net/package/Image_Graph + * @abstract + */ +class Image_Graph_Plot_Smoothed_Bezier extends Image_Graph_Plot +{ + + /** + * Image_Graph_Plot_Smoothed_Bezier [Constructor] + * + * Only 'normal' multitype supported + * + * @param Dataset $dataset The data set (value containter) to plot + * @param string $title The title of the plot (used for legends, {@link + * Image_Graph_Legend}) + */ + function Image_Graph_Plot_Smoothed_Bezier(& $dataset, $title = '') + { + parent::Image_Graph_Plot($dataset, 'normal', $title); + } + + /** + * Return the minimum Y point + * + * @return double The minumum Y point + * @access private + */ + function _minimumY() + { + return 1.05 * parent::_minimumY(); + } + + /** + * Return the maximum Y point + * + * @return double The maximum Y point + * @access private + */ + function _maximumY() + { + return 1.05 * parent::_maximumY(); + } + + /** + * Calculates all Bezier points, for the curve + * + * @param array $p1 The actual point to calculate control points for + * @param array $p0 The point "just before" $p1 + * @param array $p2 The point "just after" $p1 + * @param array $p3 The point "just after" $p2 + * @return array Array of Bezier points + * @access private + */ + function _getControlPoints($p1, $p0, $p2, $p3) + { + $p1 = $this->_pointXY($p1); + if ($p2) { + $p2 = $this->_pointXY($p2); + } + if (!$p0) { + $p0['X'] = $p1['X'] - abs($p2['X'] - $p1['X']); + $p0['Y'] = $p1['Y']; //-($p2['Y']-$p1['Y']); + } else { + $p0 = $this->_pointXY($p0); + } + if (!$p3) { + $p3['X'] = $p1['X'] + 2*abs($p1['X'] - $p0['X']); + $p3['Y'] = $p1['Y']; + } else { + $p3 = $this->_pointXY($p3); + } + + if (!$p2) { + $p2['X'] = $p1['X'] + abs($p1['X'] - $p0['X']); + $p2['Y'] = $p1['Y']; + } + + $pC1['X'] = Image_Graph_Tool::controlPoint($p0['X'], $p1['X'], $p2['X']); + $pC1['Y'] = Image_Graph_Tool::controlPoint($p0['Y'], $p1['Y'], $p2['Y']); + $pC2['X'] = Image_Graph_Tool::controlPoint($p3['X'], $p2['X'], $p1['X']); + $pC2['Y'] = Image_Graph_Tool::controlPoint($p3['Y'], $p2['Y'], $p1['Y']); + + return array( + 'X' => $p1['X'], + 'Y' => $p1['Y'], + 'P1X' => $pC1['X'], + 'P1Y' => $pC1['Y'], + 'P2X' => $pC2['X'], + 'P2Y' => $pC2['Y'] + ); + } + + /** + * Create legend sample data for the canvas. + * + * Common for all smoothed plots + * + * @access private + */ + function _addSamplePoints($x0, $y0, $x1, $y1) + { + $p = abs($x1 - $x0); + $cy = ($y0 + $y1) / 2; + $h = abs($y1 - $y0); + $dy = $h / 4; + $dw = abs($x1 - $x0) / $p; + for ($i = 0; $i < $p; $i++) { + $v = 2 * pi() * $i / $p; + $x = $x0 + $i * $dw; + $y = $cy + 2 * $v * sin($v); + $this->_canvas->addVertex(array('x' => $x, 'y' => $y)); + } + } + +} + +?>
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