<?xml version="1.0" encoding="UTF-8"?>
<inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
<_name>The Spiral Of Archimedes</_name>
<id>fablabchemnitz.de.archimedesspiral</id>
<param name="name" appearance="header" type="description">R = r + aθ</param>
<param name="r" type="int" min="0" max="1000000" _gui-text="r (mm)">50</param>
<param name="a" type="float" min="0" max="1000000" _gui-text="a">3</param>
<param name="step" type="int" min="1" max="300" _gui-text="Step">50</param>
<param name="trl" type="optiongroup" _gui-text="Turn direction">
<option value="0">Left</option>
<option value="1">Right</option>
</param>
<param name="length" type="float" min="0" max="1000000" _gui-text="Length (mm)">0</param>
<param name="turns" type="int" min="1" max="1000000" _gui-text="Turns">5</param>
<param name="desc" appearance="header" type="description">Notes</param>
<param name="desc_text" type="description">
The option "turns" only works if you set "length (mm)" to 0.0.
Otherwise the length value will be used to calculate the
spiral for given length. The higher the "step" value is
set the better the accuracy is. If you set the step value
really low the resulting length will not be precise and
the curve is maybe not drawn at all. You can validate the
length by using the extension "Visualize Path > Measure Path"
<effect>
<object-type>all</object-type>
<effects-menu>
<submenu _name="FabLab Chemnitz">
<submenu _name="Shape/Pattern from Generator" />
</submenu>
</effects-menu>
</effect>
<script>
<command reldir="extensions" interpreter="python">fablabchemnitz_archimedesspiral.py</command>
</script>
</inkscape-extension>
