public static void Run() {
var p1 = new Point(10, 10);
var p2 = new Point(20, 20);
// p1 does NOT get boxed to call ToString (a virtual method)
Console.WriteLine(p1.ToString()); // (10, 10)
// p DOES get boxed to call GetType (a non-virtual method)
Console.WriteLine(p1.GetType()); // Point
// p1 does NOT get boxed to call CompareTo
// p2 does NOT get boxed because CompareTo(Point) is called
Console.WriteLine(p1.CompareTo(p2)); // -1
// p1 DOES get boxed, and the reference is placed in c
IComparable c = p1;
Console.WriteLine(c.GetType()); // Point
// p1 does NOT get boxed to call ComapreTo
// Since CompareTo is not being passed a Point variable,
// CompareTo(Object) is called which requires a reference to
// a boxed Point
// c does NOT get boxed because it already refers to a boxed Point
Console.WriteLine(p1.CompareTo(c)); // 0
// c does NOT get boxed because it is already refers ti a boxed Point.
// p2 DOES get boxed because CompareTo(Object) is called
Console.WriteLine(c.CompareTo(p2)); // -1
// c is unboxed, and fields are copied into p2
p2 = (Point)c;
// Proves that the fields got copied into p2
Console.WriteLine(p2.ToString()); // (10, 10)
}
public void Point()
{
//Do various Point method calls to cover the point class with sufficient testing
Point p0 = new Point();
Point p1 = new Point(0,0);
Point p2 = new Point(450, 120);
Assert.IsTrue(p0.IsEmpty());
Assert.IsFalse(p1.IsEmpty());
Assert.AreNotEqual(p0, p1);
Assert.AreEqual(450, p2.X);
Assert.AreEqual(120, p2.Y);
Assert.AreNotSame(p2.Clone(), p2);
p0 = p2.Clone();
p0.X += 100; p0.Y = 150;
p0[0] += p0[1];
Assert.AreEqual(new Point(700, 150),p0);
Assert.AreEqual(p2, p2.GetBoundingBox().Min);
Assert.AreEqual(p2, p2.GetBoundingBox().Max);
Assert.IsTrue(p2.IsSimple());
Assert.IsFalse(p2.IsEmpty());
Assert.AreEqual(2, p2.NumOrdinates);
Assert.AreEqual(new Point(400, 100), p2 + new Point(-50, -20));
Assert.AreEqual(new Point(500, 100), p2 - new Point(-50, 20));
Assert.AreEqual(new Point(900, 240), p2 * 2);
Assert.AreEqual(0, p2.Dimension);
Assert.AreEqual(450, p2[0]);
Assert.AreEqual(120, p2[1]);
Assert.IsNull(p2.Boundary());
Assert.AreEqual(p2.X.GetHashCode() ^ p2.Y.GetHashCode() ^ p2.IsEmpty().GetHashCode(), p2.GetHashCode());
Assert.Greater(p2.CompareTo(p1), 0);
Assert.Less(p1.CompareTo(p2), 0);
Assert.AreEqual(p2.CompareTo(new Point(450,120)), 0);
}
HitTestBehavior InsideObstacleHitTest(Point location, Obstacle obstacle) {
if ((obstacle == insideHitTestIgnoreObstacle1) || (obstacle == insideHitTestIgnoreObstacle2)) {
// It's one of the two obstacles we already know about.
return HitTestBehavior.Continue;
}
if (obstacle.IsGroup) {
// Groups are handled differently from overlaps; we create ScanSegments (overlapped
// if within a non-group obstacle, else non-overlapped), and turn on/off access across
// the Group boundary vertices.
return HitTestBehavior.Continue;
}
if (!StaticGraphUtility.PointIsInRectangleInterior(location, obstacle.VisibilityBoundingBox)) {
// The point is on the obstacle boundary, not inside it.
return HitTestBehavior.Continue;
}
// Note: There are rounding issues using Curve.PointRelativeToCurveLocation at angled
// obstacle boundaries, hence this function.
Point high = StaticGraphUtility.RectangleBorderIntersect(obstacle.VisibilityBoundingBox, location
, insideHitTestScanDirection.Direction)
+ insideHitTestScanDirection.DirectionAsPoint;
Point low = StaticGraphUtility.RectangleBorderIntersect(obstacle.VisibilityBoundingBox, location
, insideHitTestScanDirection.OppositeDirection)
- insideHitTestScanDirection.DirectionAsPoint;
var testSeg = new LineSegment(low, high);
IList<IntersectionInfo> xxs = Curve.GetAllIntersections(testSeg, obstacle.VisibilityPolyline, true /*liftIntersections*/);
// If this is an extreme point it can have one intersection, in which case we're either on the border
// or outside; if it's a collinear flat boundary, there can be 3 intersections to this point which again
// means we're on the border (and 3 shouldn't happen anymore with the curve intersection fixes and
// PointIsInsideRectangle check above). So the interesting case is that we have 2 intersections.
if (2 == xxs.Count) {
Point firstInt = SpliceUtility.RawIntersection(xxs[0], location);
Point secondInt = SpliceUtility.RawIntersection(xxs[1], location);
// If we're on either intersection, we're on the border rather than inside.
if (!PointComparer.Equal(location, firstInt) && !PointComparer.Equal(location, secondInt)
&& (location.CompareTo(firstInt) != location.CompareTo(secondInt))) {
// We're inside. However, this may be an almost-flat side, in which case rounding
// could have reported the intersection with the start or end of the same side and
// a point somewhere on the interior of that side. Therefore if both intersections
// are on the same side (integral portion of the parameter), we consider location
// to be on the border. testSeg is always xxs[*].Segment0.
Debug.Assert(testSeg == xxs[0].Segment0, "incorrect parameter ordering to GetAllIntersections");
if (!ApproximateComparer.Close(Math.Floor(xxs[0].Par1), Math.Floor(xxs[1].Par1))) {
return HitTestBehavior.Stop;
}
}
}
return HitTestBehavior.Continue;
}