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<!-- This file is to illustrate the use of the element polygon and constraint polygon_by_vertices.
It still has not been run on any DGS, so it may contain bugs. -->
<construction xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../xml/intergeo.xsd">
<elements>
<point id="A">
<homogeneous_coordinates>
<double>0.0</double>
<double>0.0</double>
<double>1.0</double>
</homogeneous_coordinates>
</point>
<point id="B">
<homogeneous_coordinates>
<double>0.0</double>
<double>1.0</double>
<double>1.0</double>
</homogeneous_coordinates>
</point>
<point id="C">
<homogeneous_coordinates>
<double>1.0</double>
<double>1.0</double>
<double>1.0</double>
</homogeneous_coordinates>
</point>
<polygon id="p">
<list_of_vertices_coordinates>
<homogeneous_coordinates>
<double>0</double>
<double>0</double>
<double>1</double>
</homogeneous_coordinates>
<homogeneous_coordinates>
<double>0</double>
<double>1</double>
<double>1</double>
</homogeneous_coordinates>
<homogeneous_coordinates>
<double>1</double>
<double>1</double>
<double>1</double>
</homogeneous_coordinates>
</list_of_vertices_coordinates>
</polygon>
</elements>
<constraints>
<free_point>
<point out="true">A</point>
</free_point>
<free_point>
<point out="true">B</point>
</free_point>
<free_point>
<point out="true">C</point>
</free_point>
<polygon_by_vertices>
<polygon out="true">p</polygon>
<list_of_vertices>
<point>A</point>
<point>B</point>
<point>C</point>
</list_of_vertices>
</polygon_by_vertices>
</constraints>
</construction>
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