make sure the area is comparable in polar area diagram

3 files changed, 24 insertions, 23 deletions

diff --git a/dev/demo/polar.svg b/dev/demo/polar.svg
index bec99c3..a4442a0 100644
--- a/dev/demo/polar.svg
+++ b/dev/demo/polar.svg
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="150.61pt" height="130.844pt" viewBox="0 0 150.61 130.844" version="1.1">
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="160.48pt" height="146.966pt" viewBox="0 0 160.48 146.966" version="1.1">
 <defs>
 <g>
 <symbol overflow="visible" id="glyph0-0">
@@ -35,41 +35,41 @@
 </g>
 </defs>
 <g id="surface1">
-<path style="fill-rule:nonzero;fill:rgb(39.99939%,39.99939%,100%);fill-opacity:1;stroke-width:0.79701;stroke-linecap:butt;stroke-linejoin:round;stroke:rgb(0%,0%,0%);stroke-opacity:1;stroke-miterlimit:10;" d="M 0.00078125 -0.00015625 L 21.258594 -0.00015625 C 21.258594 11.742031 11.742969 21.257656 0.00078125 21.257656 Z M 0.00078125 -0.00015625 " transform="matrix(1,0,0,-1,64.675,44.91)"/>
+<path style="fill-rule:nonzero;fill:rgb(39.99939%,39.99939%,100%);fill-opacity:1;stroke-width:0.79701;stroke-linecap:butt;stroke-linejoin:round;stroke:rgb(0%,0%,0%);stroke-opacity:1;stroke-miterlimit:10;" d="M -0.00003125 0.00165625 L 42.5195 0.00165625 C 42.5195 23.482125 23.484344 42.521187 -0.00003125 42.521187 Z M -0.00003125 0.00165625 " transform="matrix(1,0,0,-1,74.543,61.029)"/>
 <g style="fill:rgb(0%,0%,0%);fill-opacity:1;">
-  <use xlink:href="#glyph0-0" x="83.925" y="25.66"/>
+  <use xlink:href="#glyph0-0" x="108.826" y="26.747"/>
 </g>
 <g style="fill:rgb(0%,0%,0%);fill-opacity:1;">
-  <use xlink:href="#glyph0-1" x="64.289" y="39.623"/>
-  <use xlink:href="#glyph0-2" x="69.2703" y="39.623"/>
-  <use xlink:href="#glyph0-3" x="74.2516" y="39.623"/>
+  <use xlink:href="#glyph0-1" x="82.904" y="46.996"/>
+  <use xlink:href="#glyph0-2" x="87.8853" y="46.996"/>
+  <use xlink:href="#glyph0-3" x="92.8666" y="46.996"/>
 </g>
-<path style="fill-rule:nonzero;fill:rgb(40.000916%,80.703735%,96.237183%);fill-opacity:1;stroke-width:0.79701;stroke-linecap:butt;stroke-linejoin:round;stroke:rgb(0%,0%,0%);stroke-opacity:1;stroke-miterlimit:10;" d="M 0.00078125 -0.00015625 L 0.00078125 42.519375 C -23.483594 42.519375 -42.51875 23.484219 -42.51875 -0.00015625 Z M 0.00078125 -0.00015625 " transform="matrix(1,0,0,-1,64.675,44.91)"/>
+<path style="fill-rule:nonzero;fill:rgb(40.000916%,80.703735%,96.237183%);fill-opacity:1;stroke-width:0.79701;stroke-linecap:butt;stroke-linejoin:round;stroke:rgb(0%,0%,0%);stroke-opacity:1;stroke-miterlimit:10;" d="M -0.00003125 0.00165625 L -0.00003125 60.130562 C -33.210969 60.130562 -60.132844 33.208687 -60.132844 0.00165625 Z M -0.00003125 0.00165625 " transform="matrix(1,0,0,-1,74.543,61.029)"/>
 <g style="fill:rgb(0%,0%,0%);fill-opacity:1;">
-  <use xlink:href="#glyph0-4" x="23.337" y="10.628"/>
+  <use xlink:href="#glyph0-4" x="20.75" y="14.293"/>
 </g>
 <g style="fill:rgb(0%,0%,0%);fill-opacity:1;">
-  <use xlink:href="#glyph0-5" x="38.05" y="30.876"/>
-  <use xlink:href="#glyph0-2" x="43.0313" y="30.876"/>
-  <use xlink:href="#glyph0-3" x="48.0126" y="30.876"/>
+  <use xlink:href="#glyph0-5" x="40.672" y="39.75"/>
+  <use xlink:href="#glyph0-2" x="45.6533" y="39.75"/>
+  <use xlink:href="#glyph0-3" x="50.6346" y="39.75"/>
 </g>
-<path style="fill-rule:nonzero;fill:rgb(100%,96.939087%,40.000916%);fill-opacity:1;stroke-width:0.79701;stroke-linecap:butt;stroke-linejoin:round;stroke:rgb(0%,0%,0%);stroke-opacity:1;stroke-miterlimit:10;" d="M 0.00078125 -0.00015625 L -63.776562 -0.00015625 C -63.776562 -35.222813 -35.225781 -63.7775 0.00078125 -63.7775 Z M 0.00078125 -0.00015625 " transform="matrix(1,0,0,-1,64.675,44.91)"/>
+<path style="fill-rule:nonzero;fill:rgb(100%,96.939087%,40.000916%);fill-opacity:1;stroke-width:0.79701;stroke-linecap:butt;stroke-linejoin:round;stroke:rgb(0%,0%,0%);stroke-opacity:1;stroke-miterlimit:10;" d="M -0.00003125 0.00165625 L -73.644563 0.00165625 C -73.644563 -40.674125 -40.675813 -73.646781 -0.00003125 -73.646781 Z M -0.00003125 0.00165625 " transform="matrix(1,0,0,-1,74.543,61.029)"/>
 <g style="fill:rgb(0%,0%,0%);fill-opacity:1;">
-  <use xlink:href="#glyph0-6" x="8.166" y="101.032"/>
+  <use xlink:href="#glyph0-6" x="11.056" y="124.129"/>
 </g>
 <g style="fill:rgb(0%,0%,0%);fill-opacity:1;">
-  <use xlink:href="#glyph0-7" x="29.304" y="74.608"/>
-  <use xlink:href="#glyph0-2" x="34.2853" y="74.608"/>
-  <use xlink:href="#glyph0-3" x="39.2666" y="74.608"/>
+  <use xlink:href="#glyph0-7" x="35.112" y="94.787"/>
+  <use xlink:href="#glyph0-2" x="40.0933" y="94.787"/>
+  <use xlink:href="#glyph0-3" x="45.0746" y="94.787"/>
 </g>
-<path style="fill-rule:nonzero;fill:rgb(100%,69.999695%,39.99939%);fill-opacity:1;stroke-width:0.79701;stroke-linecap:butt;stroke-linejoin:round;stroke:rgb(0%,0%,0%);stroke-opacity:1;stroke-miterlimit:10;" d="M 0.00078125 -0.00015625 L 0.00078125 -85.035313 C 46.965625 -85.035313 85.035938 -46.965 85.035938 -0.00015625 Z M 0.00078125 -0.00015625 " transform="matrix(1,0,0,-1,64.675,44.91)"/>
+<path style="fill-rule:nonzero;fill:rgb(100%,69.999695%,39.99939%);fill-opacity:1;stroke-width:0.79701;stroke-linecap:butt;stroke-linejoin:round;stroke:rgb(0%,0%,0%);stroke-opacity:1;stroke-miterlimit:10;" d="M -0.00003125 0.00165625 L -0.00003125 -85.037406 C 46.964812 -85.037406 85.039031 -46.967094 85.039031 0.00165625 Z M -0.00003125 0.00165625 " transform="matrix(1,0,0,-1,74.543,61.029)"/>
 <g style="fill:rgb(0%,0%,0%);fill-opacity:1;">
-  <use xlink:href="#glyph0-8" x="129.022" y="116.064"/>
+  <use xlink:href="#glyph0-8" x="138.891" y="132.185"/>
 </g>
 <g style="fill:rgb(0%,0%,0%);fill-opacity:1;">
-  <use xlink:href="#glyph0-9" x="90.528" y="83.354"/>
-  <use xlink:href="#glyph0-2" x="95.5093" y="83.354"/>
-  <use xlink:href="#glyph0-3" x="100.4906" y="83.354"/>
+  <use xlink:href="#glyph0-9" x="100.397" y="99.474"/>
+  <use xlink:href="#glyph0-2" x="105.3783" y="99.474"/>
+  <use xlink:href="#glyph0-3" x="110.3596" y="99.474"/>
 </g>
 </g>
 </svg>
diff --git a/dev/logo.png b/dev/logo.png
index 767cb66..68959bc 100644
--- a/dev/logo.png
+++ b/dev/logo.png
diff --git a/dev/pgf-pie.sty b/dev/pgf-pie.sty
index 7407f90..c9fe681 100644
--- a/dev/pgf-pie.sty
+++ b/dev/pgf-pie.sty
@@ -164,7 +164,7 @@ chart by using PGF/Tikz package.]
     }
     \pgfmathparse{\sum / \value{pgfpie@sliceLength}}
     \xdef\polarangle{\pgfmathresult}
-    \pgfmathparse{\radius / \maxValue}
+    \pgfmathparse{\radius / sqrt(\maxValue)}
     \xdef\polarRadiusUnit{\pgfmathresult}
   \else
     \xdef\theradius{\radius}
@@ -177,7 +177,8 @@ chart by using PGF/Tikz package.]
     \ifpolar
       % Polar area diagram
       \addtocounter{pgfpie@angleEnd}{\polarangle}
-      \xdef\theradius{\p*\polarRadiusUnit}
+      \pgfmathparse{sqrt(\p) * \polarRadiusUnit}
+      \xdef\theradius{\pgfmathresult}
     \else
       % normal pie
       \addtocounter{pgfpie@angleEnd}{\p}