public static bool Test(SharpDX.Plane plane, Vector3 a, Vector3 b, Vector3 c)
{
var p1 = plane.Intersects(ref a);
var p2 = plane.Intersects(ref b);
var p3 = plane.Intersects(ref c);
// if all three points are on same side and none of them are on the plane then there is no intersection
return(!(p1 == p2 && p2 == p3 && p1 != PlaneIntersectionType.Intersecting));
}
/// <summary>
/// Checks whether a point lay inside, intersects or lay outside the frustum.
/// </summary>
/// <param name="point">The point.</param>
/// <returns>Type of the containment</returns>
public ContainmentType Contains(ref Vector3 point)
{
var result = PlaneIntersectionType.Front;
var planeResult = PlaneIntersectionType.Front;
for (int i = 0; i < 6; i++)
{
switch (i)
{
case 0: planeResult = pNear.Intersects(ref point); break;
case 1: planeResult = pFar.Intersects(ref point); break;
case 2: planeResult = pLeft.Intersects(ref point); break;
case 3: planeResult = pRight.Intersects(ref point); break;
case 4: planeResult = pTop.Intersects(ref point); break;
case 5: planeResult = pBottom.Intersects(ref point); break;
}
switch (planeResult)
{
case PlaneIntersectionType.Back:
return(ContainmentType.Disjoint);
case PlaneIntersectionType.Intersecting:
result = PlaneIntersectionType.Intersecting;
break;
}
}
switch (result)
{
case PlaneIntersectionType.Intersecting: return(ContainmentType.Intersects);
default: return(ContainmentType.Contains);
}
}
public override bool Test(AxisAlignedBoundingBox other)
{
return(splane.Intersects(ref other.sbb) == PlaneIntersectionType.Intersecting);
}