public void IsovistFromPointReturnsExceptionIfOriginPointIsInsideInternalPolygonTest()
{
// Create obstruction
Polygon internals = Rectangle.ByWidthLength(5, 5) as Polygon;
// Create origin point
Point originPoint = Point.ByCoordinates(0, 0);
Assert.Throws <ApplicationException>(() => Isovist.FromPoint(new List <Polygon> {
layoutPolygon
}, new List <Polygon> {
internals
}, originPoint));
}
public void IsovistFromPointReturnsCorrectSurfaceAreaTest()
{
// Create origin point
Point originPoint = layoutPolygon.Center();
// Create isovist form the origin point
Surface isovist = Isovist.FromPoint(new List <Polygon> {
layoutPolygon
}, new List <Polygon> {
layoutPolygon
}, originPoint);
// Checks if the area of the isovist is equal to the area of the layout
// as there are no obstructions the entire layout should be visible from the origin point
Assert.AreEqual(isovist.Area, Surface.ByPatch(layoutPolygon).Area);
}
public void IsovistFromPointDetectsObstructionsInLayoutTest()
{
// Create obstruction
Polygon internals = Rectangle.ByWidthLength(5, 5) as Polygon;
// Create origin point
Point originPoint = Point.ByCoordinates(3, 3);
// Create isovist form the origin point
Surface isovist = Isovist.FromPoint(new List <Polygon> {
layoutPolygon
}, new List <Polygon> {
internals
}, originPoint);
// Checks that the area returned by the isovist is not equal to the area of the layout
// and that the isovist does not intersect the midpoint of the obstacle.
Assert.AreNotEqual(Surface.ByPatch(layoutPolygon).Area, isovist.Area);
Assert.False(isovist.DoesIntersect(internals.Center()));
}
