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+<?xml version="1.0" encoding="UTF-8"?>
+<inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
+ <name>Parametric Curves</name>
+ <id>org.inkscape.effect.param_curves</id>
+ <param name="tab" type="notebook">
+ <page name="sampling" gui-text="Range and Sampling">
+ <param name="t_start" type="float" min="-1000.0" max="1000.0" gui-text="Start t-value:">0.0</param>
+ <param name="t_end" type="float" min="-1000.0" max="1000.0" gui-text="End t-value:">1.0</param>
+ <param name="times2pi" type="bool" gui-text="Multiply t-range by 2*pi">true</param>
+ <param name="xleft" type="float" min="-1000.0" max="1000.0" gui-text="X-value of rectangle's left:">-1.0</param>
+ <param name="xright" type="float" min="-1000.0" max="1000.0" gui-text="X-value of rectangle's right:">1.0</param>
+ <param name="ybottom" type="float" min="-1000.0" max="1000.0" gui-text="Y-value of rectangle's bottom:">-1.0</param>
+ <param name="ytop" type="float" min="-1000.0" max="1000.0" gui-text="Y-value of rectangle's top:">1.0</param>
+ <param name="samples" type="int" min="2" max="1000" gui-text="Samples:">30</param>
+ <param name="isoscale" type="bool" gui-text="Isotropic scaling">false</param>
+ <label>When set, Isotropic scaling uses smallest of width/xrange or height/yrange</label>
+ </page>
+ <page name="use" gui-text="Use">
+ <label xml:space="preserve">Select a rectangle before calling the extension, it will determine X and Y scales.
+First derivatives are always determined numerically.</label>
+ </page>
+ <page name="desc" gui-text="Functions">
+ <label>Standard Python math functions are available:</label>
+ <label xml:space="preserve" translatable="no">
+ceil(x); copysign(x, y); fabs(x); floor(x); fmod(x,y); frexp(x); ldexp(x,i); modf(x); remainder(x, y); trunc(x);
+
+exp(x); expm1(x); log(x [, base]); log1p(x); log2(x); log10(x); pow(x,y); sqrt(x);
+
+cos(x); sin(x); tan(x); acos(x); asin(x); atan(x); atan2(y,x); dist(p, q); hypot(x,y);
+
+degrees(x); radians(x);
+
+cosh(x); sinh(x); tanh(x); acosh(x); asinh(x); atanh(x);
+
+erf(x); erfc(x); gamma(x); lgamma(x).
+ </label>
+ <label>The constants pi, e and tau are also available.</label>
+
+ <label>Functions from the random library may also be used,
+ eg. random(); randint(a, b); uniform(a, b).</label>
+ </page>
+ <page name="Help" gui-text="Help">
+ <label>This extension creates a parametric plot of a vector valued function (in variable t).</label>
+
+ <label>In order to use the extension, select a rectangle first. The rectangle will serve as bounding box of the plot.</label>
+ </page>
+ </param>
+ <param name="fofx" type="string" gui-text="X-Function:">cos(3*t)</param>
+ <param name="fofy" type="string" gui-text="Y-Function:">sin(5*t)</param>
+ <param name="remove" type="bool" gui-text="Remove rectangle">true</param>
+ <param name="drawaxis" type="bool" gui-text="Draw Axes">false</param>
+ <effect>
+ <object-type>rect</object-type>
+ <effects-menu>
+ <submenu name="Render"/>
+ </effects-menu>
+ </effect>
+ <script>
+ <command location="inx" interpreter="python">param_curves.py</command>
+ </script>
+</inkscape-extension>