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msd2/tracking/piwik/vendor/szymach/c-pchart/doc/polar.md

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+# Drawing a polar chart
+
+[Reference](http://wiki.pchart.net/doc.draw.polar.html)
+
+```php
+require '/path/to/your/vendor/autoload.php';
+
+use CpChart\Chart\Data;
+use CpChart\Chart\Image;
+use CpChart\Chart\Radar;
+
+/* Create and populate the Data object */
+$data = new Data();
+$data->addPoints([10, 20, 30, 40, 50, 60, 70, 80, 90], "ScoreA");
+$data->addPoints([20, 40, 50, 12, 10, 30, 40, 50, 60], "ScoreB");
+$data->setSerieDescription("ScoreA", "Coverage A");
+$data->setSerieDescription("ScoreB", "Coverage B");
+
+/* Define the absissa serie */
+$data->addPoints([40, 80, 120, 160, 200, 240, 280, 320, 360], "Coord");
+$data->setAbscissa("Coord");
+
+/* Create the Image object */
+$image = new Image(700, 230, $data);
+
+/* Draw a solid background */
+$settings = ["R" => 179, "G" => 217, "B" => 91, "Dash" => 1, "DashR" => 199, "DashG" => 237, "DashB" => 111];
+$image->drawFilledRectangle(0, 0, 700, 230, $settings);
+
+/* Overlay some gradient areas */
+$settings = ["StartR" => 194, "StartG" => 231, "StartB" => 44, "EndR" => 43, "EndG" => 107, "EndB" => 58, "Alpha" => 50];
+$image->drawGradientArea(0, 0, 700, 230, DIRECTION_VERTICAL, $settings);
+$image->drawGradientArea(0, 0, 700, 20, DIRECTION_VERTICAL, [
+    "StartR" => 0,
+    "StartG" => 0,
+    "StartB" => 0,
+    "EndR" => 50,
+    "EndG" => 50,
+    "EndB" => 50,
+    "Alpha" => 100
+]);
+
+/* Add a border to the picture */
+$image->drawRectangle(0, 0, 699, 229, ["R" => 0, "G" => 0, "B" => 0]);
+
+/* Write the picture title */
+$image->setFontProperties(["FontName" => "Silkscreen.ttf", "FontSize" => 6]);
+$image->drawText(10, 13, "pRadar - Draw polar charts", ["R" => 255, "G" => 255,
+    "B" => 255]);
+
+/* Set the default font properties */
+$image->setFontProperties(["FontName" => "Forgotte.ttf", "FontSize" => 10,
+    "R" => 80, "G" => 80, "B" => 80]);
+
+/* Enable shadow computing */
+$image->setShadow(true, ["X" => 2, "Y" => 2, "R" => 0, "G" => 0, "B" => 0,
+    "Alpha" => 10]);
+
+/* Create the pRadar object */
+$radarChart = new Radar();
+
+/* Draw a polar chart */
+$image->setGraphArea(10, 25, 340, 225);
+$options = ["BackgroundGradient" => [
+    "StartR" => 255,
+    "StartG" => 255,
+    "StartB" => 255,
+    "StartAlpha" => 100,
+    "EndR" => 207,
+    "EndG" => 227,
+    "EndB" => 125,
+    "EndAlpha" => 50
+]];
+$radarChart->drawPolar($image, $data, $options);
+
+/* Draw a polar chart */
+$image->setGraphArea(350, 25, 690, 225);
+$options = [
+    "LabelPos" => RADAR_LABELS_HORIZONTAL,
+    "BackgroundGradient" => [
+        "StartR" => 255, "StartG" => 255, "StartB" => 255, "StartAlpha" => 50, "EndR" => 32,
+        "EndG" => 109, "EndB" => 174, "EndAlpha" => 30
+    ],
+    "AxisRotation" => 0,
+    "DrawPoly" => true,
+    "PolyAlpha" => 50
+];
+$radarChart->drawPolar($image, $data, $options);
+
+/* Write the chart legend */
+$image->setFontProperties(["FontName" => "pf_arma_five.ttf", "FontSize" => 6]);
+$image->drawLegend(270, 205, ["Style" => LEGEND_BOX, "Mode" => LEGEND_HORIZONTAL]);
+
+/* Render the picture (choose the best way) */
+$image->autoOutput("example.polar.png");
+```