/// <summary>
/// Returns the 3D point that the user most likely clicked on.
/// Returns the closest intersection with a mesh, if possible.
/// If useClosestMeshIfPossible is true it will otherwise returns the mesh vertex that is closest to the clicked 2D screen coordinate, if possible.
/// Returns the unprojected position otherwise.
/// Also returns the 2D point corresponding to the returned 3D point.
/// </summary>
/// <param name="position"> The point in screen coordinates to calculate the closest vertices for. </param>
/// <param name="useClosestMeshIfPossible"> When true the closest vertex point to the clicked position will be used when no mesh is hit at the exact mouse cursor area.</param>
public NearestPointInCamera CalculateMouseDownNearestPoint(Point position, bool useClosestMeshIfPossible)
{
if (mViewPort3D.FindNearest(position, out Point3D nearestPoint, out _, out _))
{
return(new NearestPointInCamera(position, nearestPoint));
}
if (useClosestMeshIfPossible)
{
ClosestVertexResult closestResult = ResultOfClosestPointHit2D(position);
if (closestResult != null)
{
return(new NearestPointInCamera(closestResult.ClosestPointIn2D, closestResult.ClosestPoint));
}
}
Point3D?unprojectedPosition = mViewPort3D.UnProject(position);
return(new NearestPointInCamera(position, unprojectedPosition));
}
