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<?php |
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/** |
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* Copyright (C) 2022 Graham Breach |
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* |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU Lesser General Public License as published by |
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* the Free Software Foundation, either version 3 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>. |
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*/ |
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/** |
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* For more information, please contact <graham@goat1000.com> |
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*/ |
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|
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namespace Goat1000\SVGGraph; |
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|
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abstract class HorizontalThreeDGraph extends HorizontalGridGraph { |
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|
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use ThreeDTrait; |
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|
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/** |
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* Adjust axes for block spacing, setting the depth unit |
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*/ |
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protected function adjustAxes(&$x_len, &$y_len) |
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{ |
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// make sure project_angle is in range |
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$this->project_angle = min(89, max(1, $this->getOption('project_angle', 30))); |
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|
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$ends = $this->getAxisEnds(); |
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$bars = $ends['k_max'][0] - $ends['k_min'][0] + 1; |
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$a = deg2rad($this->project_angle); |
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|
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$depth = $this->depth; |
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$u = $y_len / ($bars + $depth * cos($a)); |
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$c = $u * $depth * cos($a); |
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if($c > $x_len) { |
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// doesn't fit - use 1/2 length |
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$c = $x_len / 2; |
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$u = $d / $depth * cos($a); |
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} |
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$d = $u * $depth * sin($a); |
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$x_len -= $c; |
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$y_len -= $d; |
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$this->depth_unit = $y_len / $bars; |
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return [$c, $d]; |
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} |
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|
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/** |
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* Returns the (vertical) grid stripes as a string |
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*/ |
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protected function getGridStripes() |
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{ |
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if(!$this->getOption('grid_back_stripe')) |
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return ''; |
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|
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$z = $this->depth * $this->depth_unit; |
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list($xd,$yd) = $this->project(0, 0, $z); |
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$y_h = new Number($this->g_height); |
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$minus_y_h = new Number(-$this->g_height); |
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$ybottom = new Number($this->height - $this->pad_bottom); |
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$minus_xd = new Number(-$xd); |
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$minus_yd = new Number(-$yd); |
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$xd = new Number($xd); |
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$yd = new Number($yd); |
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|
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// use array of colours if available, otherwise stripe a single colour |
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$colours = $this->getOption('grid_back_stripe_colour'); |
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if(!is_array($colours)) |
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$colours = [null, $colours]; |
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$opacity = $this->getOption('grid_back_stripe_opacity'); |
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|
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$pathdata = ''; |
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$c = 0; |
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$p1 = null; |
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$num_colours = count($colours); |
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$points = $this->getGridPointsX($this->main_x_axis); |
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$first = array_shift($points); |
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$last_pos = $first->position; |
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$stripes = ''; |
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foreach($points as $x) { |
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$x = $x->position; |
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$cc = $colours[$c % $num_colours]; |
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if($cc !== null) { |
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$x1 = $last_pos - $x; |
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$dpath = new PathData('M', $x, $ybottom, |
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'l', $xd, $yd, |
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'v', $minus_y_h, |
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'h', $x1, |
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'v', $y_h, |
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'l', $minus_xd, $minus_yd, 'z'); |
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$bpath = [ |
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'fill' => new Colour($this, $cc), |
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'd' => $dpath, |
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]; |
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if($opacity != 1) |
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$bpath['fill-opacity'] = $opacity; |
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$stripes .= $this->element('path', $bpath); |
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} else { |
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$p1 = $x; |
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} |
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$last_pos = $x; |
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++$c; |
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} |
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return $stripes; |
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} |
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} |
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|
