public void Polygon_Extrude()
{
Point basePoint = Point.Origin;
Point topLeftPoint = Point.MakePointWithInches(0, 4, 0);
Point bottomRightPoint = Point.MakePointWithInches(8, 0, 0);
Point topRightPoint = Point.MakePointWithInches(8, 4, 0);
Point backbasepoint = Point.MakePointWithInches(0, 0, -4);
Point backtopleftpoint = Point.MakePointWithInches(0, 4, -4);
Point backbottomrightpoint = Point.MakePointWithInches(8, 0, -4);
Point backtoprightpoint = Point.MakePointWithInches(8, 4, -4);
LineSegment left = new LineSegment(basePoint, topLeftPoint);
LineSegment right = new LineSegment(bottomRightPoint, topRightPoint);
LineSegment top = new LineSegment(topLeftPoint, topRightPoint);
LineSegment bottom = new LineSegment(basePoint, bottomRightPoint);
LineSegment backLeft = new LineSegment(backbasepoint, backtopleftpoint);
LineSegment backRight = new LineSegment(backbottomrightpoint, backtoprightpoint);
LineSegment backTop = new LineSegment(backtopleftpoint, backtoprightpoint);
LineSegment backBottom = new LineSegment(backbasepoint, backbottomrightpoint);
LineSegment topleftConnector = new LineSegment(topLeftPoint, backtopleftpoint);
LineSegment toprightConnector = new LineSegment(topRightPoint, backtoprightpoint);
LineSegment baseConnector = new LineSegment(basePoint, backbasepoint);
LineSegment bottomRightConnector = new LineSegment(bottomRightPoint, backbottomrightpoint);
Polygon frontRegion = new Polygon(new List<LineSegment> { left, top, bottom, right });
Polygon backRegion = new Polygon(new List<LineSegment> { backLeft, backRight, backTop, backBottom });
Polygon topRegion = new Polygon(new List<LineSegment> { top, backTop, topleftConnector, toprightConnector });
Polygon bottomRegion = new Polygon(new List<LineSegment> { bottom, backBottom, baseConnector, bottomRightConnector });
Polygon leftRegion = new Polygon(new List<LineSegment> { left, backLeft, baseConnector, topleftConnector });
Polygon rightRegion = new Polygon(new List<LineSegment> { right, backRight, toprightConnector, bottomRightConnector });
Polyhedron extrudedResult = frontRegion.Extrude(new Vector(Point.MakePointWithInches(0, 0, -4)));
extrudedResult.Polygons.Contains(frontRegion).Should().BeTrue();
extrudedResult.Polygons.Contains(backRegion).Should().BeTrue();
extrudedResult.Polygons.Contains(topRegion).Should().BeTrue();
extrudedResult.Polygons.Contains(bottomRegion).Should().BeTrue();
extrudedResult.Polygons.Contains(leftRegion).Should().BeTrue();
extrudedResult.Polygons.Contains(rightRegion).Should().BeTrue();
}
