private List <T> FindNeighbours(T point, double radius, BalancedKdTreeNode <T> node, Func <T, T, double> distanceFunc = null)
{
var result = new List <T>();
//if (distanceFunc(point, node.Point) <= radius)
//{
// result.Add(node.Point);
//}
if (node.LeftChild != null && !node.LeftChild.IsNilNode())
{
var relation = SpatialUtility.CalculateAxisAlignedRectangleRelationToCircle(PointFunc(point), radius, node.LeftChild.MinimumBoundingBox);
if (relation == IRI.Msh.Common.Model.SpatialRelation.Contained)
{
result.AddRange(GetAllValues(node.LeftChild));
}
else if (relation == IRI.Msh.Common.Model.SpatialRelation.Intersects)
{
result.AddRange(FindNeighbours(point, radius, node.LeftChild, distanceFunc));
}
}
if (node.RightChild != null && !node.RightChild.IsNilNode())
{
var relation = SpatialUtility.CalculateAxisAlignedRectangleRelationToCircle(PointFunc(point), radius, node.RightChild.MinimumBoundingBox);
if (relation == IRI.Msh.Common.Model.SpatialRelation.Contained)
{
result.AddRange(GetAllValues(node.RightChild));
}
else if (relation == IRI.Msh.Common.Model.SpatialRelation.Intersects)
{
result.AddRange(FindNeighbours(point, radius, node.RightChild, distanceFunc));
}
}
return(result);
}
public void TestCircleRectangleIntersects()
{
// -------
// | |
// | |
// | |
// -------
BoundingBox rectangle = new BoundingBox(0, 0, 10, 20);
var radius = 5;
Point insideRectangle = new Point(5, 9);
Assert.AreEqual(true, SpatialUtility.CircleRectangleIntersects(insideRectangle, radius, rectangle));
Point topOfRectangle = new Point(5, 25.1);
Assert.AreEqual(false, SpatialUtility.CircleRectangleIntersects(topOfRectangle, radius, rectangle));
Point bottomOfRectangle = new Point(5, -6);
Assert.AreEqual(false, SpatialUtility.CircleRectangleIntersects(bottomOfRectangle, radius, rectangle));
Point topRightCorner = new Point(13, 24);
Assert.AreEqual(true, SpatialUtility.CircleRectangleIntersects(topRightCorner, radius, rectangle));
Point topRightCorner2 = new Point(13.1, 24);
Assert.AreEqual(false, SpatialUtility.CircleRectangleIntersects(topRightCorner2, radius, rectangle));
Point centerRectangle = new Point(5, 10);
Assert.AreEqual(false, SpatialUtility.IsAxisAlignedRectangleInsideCircle(centerRectangle, radius, rectangle));
Point insideRectangle2 = new Point(5.1, 10);
Assert.AreEqual(false, SpatialUtility.IsAxisAlignedRectangleInsideCircle(insideRectangle2, radius, rectangle));
Point insideRectangle3 = new Point(5.1, 10);
Assert.AreEqual(false, SpatialUtility.IsAxisAlignedRectangleInsideCircle(insideRectangle3, 11.19, rectangle));
Point insideRectangle4 = new Point(5, 10);
Assert.AreEqual(true, SpatialUtility.IsAxisAlignedRectangleInsideCircle(insideRectangle4, 11.19, rectangle));
Assert.AreEqual(Intersects, SpatialUtility.CalculateAxisAlignedRectangleRelationToCircle(insideRectangle, radius, rectangle));
Assert.AreEqual(Disjoint, SpatialUtility.CalculateAxisAlignedRectangleRelationToCircle(topOfRectangle, radius, rectangle));
Assert.AreEqual(Disjoint, SpatialUtility.CalculateAxisAlignedRectangleRelationToCircle(bottomOfRectangle, radius, rectangle));
Assert.AreEqual(Intersects, SpatialUtility.CalculateAxisAlignedRectangleRelationToCircle(topRightCorner, radius, rectangle));
Assert.AreEqual(Disjoint, SpatialUtility.CalculateAxisAlignedRectangleRelationToCircle(topRightCorner2, radius, rectangle));
Assert.AreEqual(Intersects, SpatialUtility.CalculateAxisAlignedRectangleRelationToCircle(centerRectangle, radius, rectangle));
Assert.AreEqual(Intersects, SpatialUtility.CalculateAxisAlignedRectangleRelationToCircle(insideRectangle2, radius, rectangle));
Assert.AreEqual(Intersects, SpatialUtility.CalculateAxisAlignedRectangleRelationToCircle(insideRectangle3, 11.19, rectangle));
Assert.AreEqual(Contained, SpatialUtility.CalculateAxisAlignedRectangleRelationToCircle(insideRectangle4, 11.19, rectangle));
}
