public ICollection <Vector2D> ComputePositionsOnPlane(IEnumerable <Vector3D> positions)
{
if (positions == null)
{
throw new ArgumentNullException("positions");
}
IList <Vector2D> positionsOnPlane = new List <Vector2D>(CollectionAlgorithms.EnumerableCount(positions));
foreach (Vector3D position in positions)
{
Vector3D intersectionPoint;
if (IntersectionTests.TryRayPlane(Vector3D.Zero, position.Normalize(), _normal, _d, out intersectionPoint))
{
Vector3D v = intersectionPoint - _origin;
positionsOnPlane.Add(new Vector2D(_xAxis.Dot(v), _yAxis.Dot(v)));
}
else
{
// Ray does not intersect plane
}
}
return(positionsOnPlane);
}
public void RayPlaneIntersects()
{
Vector3D intersectionPoint;
Vector3D normal = Vector3D.UnitX;
Assert.IsTrue(IntersectionTests.TryRayPlane(Vector3D.Zero, Vector3D.UnitX,
normal, planeD(Vector3D.UnitX, normal), out intersectionPoint));
}
public void RayPlaneOppositeDirection2()
{
Vector3D intersectionPoint;
Vector3D normal = Vector3D.UnitX;
Assert.IsFalse(IntersectionTests.TryRayPlane(Vector3D.Zero, Vector3D.UnitX,
normal, planeD(-Vector3D.UnitX, normal), out intersectionPoint));
}
public void RayPlaneParallel()
{
Vector3D intersectionPoint;
Vector3D normal = Vector3D.UnitY;
Assert.IsFalse(IntersectionTests.TryRayPlane(Vector3D.Zero, Vector3D.UnitX,
normal, planeD(Vector3D.UnitY, normal), out intersectionPoint));
}