From b28028ac4082842143b0f528d6bc539da6ccb419 Mon Sep 17 00:00:00 2001
From: Pliable Pixels <pliablepixels@gmail.com>
Date: Thu, 21 Sep 2017 12:49:18 -0400
Subject: mega changes, including updates and X

---
 .../vis/examples/graph3d/playground/datasource.php | 155 +++++++++++++++++++++
 1 file changed, 155 insertions(+)
 create mode 100644 www/lib/vis/examples/graph3d/playground/datasource.php

(limited to 'www/lib/vis/examples/graph3d/playground/datasource.php')

diff --git a/www/lib/vis/examples/graph3d/playground/datasource.php b/www/lib/vis/examples/graph3d/playground/datasource.php
new file mode 100644
index 00000000..9c265cb9
--- /dev/null
+++ b/www/lib/vis/examples/graph3d/playground/datasource.php
@@ -0,0 +1,155 @@
+<?php
+
+/* 
+This datasource returns a response in the form of a google query response
+
+USAGE
+All parameters are optional
+datasource.php?xmin=0&xmax=314&xstepnum=25&ymin=0&ymax=314&ystepnum=25
+
+DOCUMENTATION
+http://code.google.com/apis/visualization/documentation/dev/implementing_data_source.html
+
+
+EXAMPLE OF A RESPONSE FILE
+
+Note that the reqId in the response must correspond with the reqId from the 
+request.
+________________________________________________________________________________
+
+google.visualization.Query.setResponse({
+  version:'0.6',
+  reqId:'0',
+  status:'ok',
+  table:{
+    cols:[
+      {id:'x',
+       label:'x',
+       type:'number'},
+      {id:'y',
+       label:'y',
+       type:'number'},
+      {id:'value',
+       label:'value',
+       type:'number'}
+    ],
+    rows:[
+      {c:[{v:0}, {v:0}, {v:10.0}]},
+      {c:[{v:1}, {v:0}, {v:12.0}]},
+      {c:[{v:2}, {v:0}, {v:13.0}]},
+      {c:[{v:0}, {v:1}, {v:11.0}]},
+      {c:[{v:1}, {v:1}, {v:14.0}]},
+      {c:[{v:2}, {v:1}, {v:11.0}]}
+    ]
+  }
+});
+________________________________________________________________________________
+
+*/
+
+
+/**
+ * A custom function
+ */ 
+function custom($x, $y) {
+  $d = sqrt(pow($x/100, 2) + pow($y/100, 2));
+  
+  return 50 * exp(-5 * $d / 10) * sin($d*5);
+}
+
+
+
+
+// retrieve parameters
+$default_stepnum = 25;
+
+$xmin     = isset($_REQUEST['xmin'])     ? (float)$_REQUEST['xmin']   : -100;
+$xmax     = isset($_REQUEST['xmax'])     ? (float)$_REQUEST['xmax']   : 100;
+$xstepnum = isset($_REQUEST['xstepnum']) ? (int)$_REQUEST['xstepnum'] : $default_stepnum;
+
+$ymin     = isset($_REQUEST['ymin'])     ? (float)$_REQUEST['ymin']   : -100;
+$ymax     = isset($_REQUEST['ymax'])     ? (float)$_REQUEST['ymax']   : 100;
+$ystepnum = isset($_REQUEST['ystepnum']) ? (int)$_REQUEST['ystepnum'] : $default_stepnum;
+
+// in the reply we must fill in the request id that came with the request
+$reqId = getReqId();
+
+// check for a maximum number of datapoints (for safety)
+if ($xstepnum * $ystepnum > 10000) {
+  echo "google.visualization.Query.setResponse({
+    version:'0.6',
+    reqId:'$reqId',
+    status:'error',
+    errors:[{reason:'not_supported', message:'Maximum number of datapoints exceeded'}]
+  });";
+
+  exit;
+}
+
+
+// output the header part of the response
+echo "google.visualization.Query.setResponse({
+  version:'0.6',
+  reqId:'$reqId',
+  status:'ok',
+  table:{
+    cols:[
+      {id:'x',
+       label:'x',
+       type:'number'},
+      {id:'y',
+       label:'y',
+       type:'number'},
+      {id:'value',
+       label:'',
+       type:'number'}
+    ],
+    rows:[";
+
+// output the actual values
+$first = true;
+$xstep = ($xmax - $xmin) / $xstepnum;
+$ystep = ($ymax - $ymin) / $ystepnum;
+for ($x = $xmin; $x < $xmax; $x+=$xstep) {
+  for ($y = $ymin; $y < $ymax; $y+=$ystep) {
+    $value = custom($x,$y);
+    
+    if (!$first) {
+      echo ",\n";
+    } 
+    else {
+      echo "\n";
+    }
+    echo "      {c:[{v:$x}, {v:$y}, {v:$value}]}";
+    
+    $first = false;
+  }
+}
+
+
+// output the end part of the response
+echo "      
+    ]
+  }
+});
+";
+
+
+/**
+ * Retrieve the request id from the get/post data
+ * @return {number} $reqId       The request id, or 0 if not found
+ */ 
+function getReqId() {
+  $reqId = 0;
+
+  foreach ($_REQUEST as $req) {
+    if (substr($req, 0,6) == "reqId:") {
+      $reqId = substr($req, 6);
+    }
+  }
+
+  return $reqId;
+}
+
+
+?>
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