public void GeoPolygon_ContainsPoint()
{
GeoPolygon poly;
//-----------------------------------------------------------------
// Test a point polygon.
poly = new GeoPolygon(new GeoCoordinate[] { new GeoCoordinate(10, 10) });
Assert.IsTrue(poly.Contains(new GeoCoordinate(10, 10)));
Assert.IsFalse(poly.Contains(new GeoCoordinate(10, 0)));
Assert.IsFalse(poly.Contains(new GeoCoordinate(0, 10)));
//-----------------------------------------------------------------
// Test a simple rectangle
poly = new GeoPolygon(
new GeoCoordinate[] {
new GeoCoordinate(45, 0),
new GeoCoordinate(0, 0),
new GeoCoordinate(6, 60),
new GeoCoordinate(45, 60)
});
// Points inside
Assert.IsTrue(poly.Contains(new GeoCoordinate(22.5, 30)));
// Points outside
Assert.IsFalse(poly.Contains(new GeoCoordinate(22.5, 61)));
Assert.IsFalse(poly.Contains(new GeoCoordinate(-1, 61)));
Assert.IsFalse(poly.Contains(new GeoCoordinate(-1, 30)));
Assert.IsFalse(poly.Contains(new GeoCoordinate(0, -1)));
Assert.IsFalse(poly.Contains(new GeoCoordinate(22.5, -1)));
Assert.IsFalse(poly.Contains(new GeoCoordinate(46, -1)));
//-----------------------------------------------------------------
// Test a slanted parallelogram.
poly = new GeoPolygon(
new GeoCoordinate[] {
new GeoCoordinate(45, 0),
new GeoCoordinate(0, 45),
new GeoCoordinate(0, 155),
new GeoCoordinate(45, 65)
});
// Points inside the polygon
Assert.IsTrue(poly.Contains(new GeoCoordinate(22.5, 60)));
Assert.IsTrue(poly.Contains(new GeoCoordinate(1, 119)));
Assert.IsTrue(poly.Contains(new GeoCoordinate(1, 46)));
// Points outside the polygon but within the bounding rectangle
Assert.IsFalse(poly.Contains(new GeoCoordinate(44, 119)));
Assert.IsFalse(poly.Contains(new GeoCoordinate(1, 1)));
// Points outside the bounding rectangle
Assert.IsFalse(poly.Contains(new GeoCoordinate(46, 121)));
Assert.IsFalse(poly.Contains(new GeoCoordinate(46, 60)));
Assert.IsFalse(poly.Contains(new GeoCoordinate(46, -1)));
Assert.IsFalse(poly.Contains(new GeoCoordinate(22.5, -1)));
Assert.IsFalse(poly.Contains(new GeoCoordinate(44, 119)));
Assert.IsFalse(poly.Contains(new GeoCoordinate(-1, -1)));
Assert.IsFalse(poly.Contains(new GeoCoordinate(-1, 60)));
Assert.IsFalse(poly.Contains(new GeoCoordinate(-1, 121)));
Assert.IsFalse(poly.Contains(new GeoCoordinate(22.5, 121)));
}