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addons/curved_lines_2d/tests/cubic_bezier.svg

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+<?xml version="1.0" standalone="no"?>
+<svg width="5cm" height="4cm" viewBox="0 0 500 400"
+     xmlns="http://www.w3.org/2000/svg" version="1.1">
+  <title>Example cubic01- cubic Bézier commands in path data</title>
+  <desc>Picture showing a simple example of path data
+        using both a "C" and an "S" command,
+        along with annotations showing the control points
+        and end points</desc>
+  <style type="text/css"><![CDATA[
+    .Border { fill:none; stroke:blue; stroke-width:1 }
+    .Connect { fill:none; stroke:#888888; stroke-width:2 }
+    .SamplePath { fill:none; stroke:red; stroke-width:5 }
+    .EndPoint { fill:none; stroke:#888888; stroke-width:2 }
+    .CtlPoint { fill:#888888; stroke:none }
+    .AutoCtlPoint { fill:none; stroke:blue; stroke-width:4 }
+    .Label { font-size:22; font-family:Verdana }
+  ]]></style>
+
+  <!-- <rect class="Border" x="1" y="1" width="498" height="398" /> -->
+
+  <polyline class="Connect" points="100,200 100,100" />
+  <polyline class="Connect" points="250,100 250,200" />
+  <polyline class="Connect" points="250,200 250,300" />
+  <polyline class="Connect" points="400,300 400,200" />
+  <path class="SamplePath" d="M100,200 C100,100 250,
+                  100 250,200 s150,100 150,0" />
+  <circle class="EndPoint" cx="100" cy="200" r="10" />
+  <circle class="EndPoint" cx="250" cy="200" r="10" />
+  <circle class="EndPoint" cx="400" cy="200" r="10" />
+  <circle class="CtlPoint" cx="100" cy="100" r="10" />
+  <circle class="CtlPoint" cx="250" cy="100" r="10" />
+  <circle class="CtlPoint" cx="400" cy="300" r="10" />
+  <circle class="AutoCtlPoint" cx="250" cy="300" r="9" />
+  <text class="Label" x="25" y="70">M100,200 C100,100 250,100 250,200</text>
+  <text class="Label" x="325" y="350"
+        style="text-anchor:middle">S400,300 400,200</text>
+</svg>