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<title>Execute</title>
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<td class="Banner" nowrap=""><a href="../../../_Body.htm" class="Banner"><img src="../../../../../../Images/_Unit.gif" align="absmiddle">ClipperLib</a>
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<h1>ClipperOffset.Execute</h1>
<p class="Decl"><span class="Comment">Del.»</span> <b>procedure</b> Execute(<b>out</b> solution: TPaths; Delta: Double); <b>overload</b>;</p>
<p class="Decl2"><span class="Comment"> C++ »</span> <b>void</b> Execute(Paths& solution, double delta);</p>
<p class="Decl3"><span class="Comment">C# »</span> <b>public void</b> Execute(ref Paths solution, double delta);</p>
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<p class="Decl"><span class="Comment">Del.»</span> <b>procedure</b> Execute(<b>out</b> PolyTree: TPolyTree; Delta: Double); <b>overload</b>;</p>
<p class="Decl2"><span class="Comment"> C++ »</span> <b>void</b> Execute(PolyTree& polytree, double delta);</p>
<p class="Decl3"><span class="Comment">C# »</span> <b>public void</b> Execute(ref PolyTree polytree, double delta);</p>
<br>
<p class="Body"> This method takes two parameters. The first is the structure that receives the result of the offset operation (either a PolyTree or a Paths structure). The second parameter is the amount to which the supplied paths will be offset. Negative delta values shrink polygons and positive delta expand them.<br><br> This method can be called multiple times, offsetting the same paths by different amounts (ie using different deltas).<br><br> <img src="../../../../../../Images/offset1.png" alt="" width="310" height="314" border="0" align="right">
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<pre class="brush: cpp;">
#include "clipper.hpp"
...
using namespace ClipperLib;
int main()
{
Path subj;
Paths solution;
subj <<
IntPoint(348,257) << IntPoint(364,148) << IntPoint(362,148) <<
IntPoint(326,241) << IntPoint(295,219) << IntPoint(258,88) <<
IntPoint(440,129) << IntPoint(370,196) << IntPoint(372,275);
ClipperOffset co;
co.AddPath(subj, jtRound, etClosedPolygon);
co.Execute(solution, -7.0);
//draw solution ...
DrawPolygons(solution, 0x4000FF00, 0xFF009900);
}
</pre>
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