viewpoint3dto2d

  VIEWPOINT3DTO2D Project a 3D point onto 2D with a given camera matrix

   PTS2D = VIEWPOINT3DTO2D(PTS3D, CAMERAMATRIX)

   Converts a list of 3D points PTS3D into their corresponding
   2D projection for the camera matrix CAMERAMATRIX.  The matrix PTS3D should be
   a list of column vectors (3xN, where N is the number of points). CAMERAMATRIX
   is a standard camera matrix (see Wikipedia for "camera matrix").

   Output: PTS2D is a list of column vectors (2xN) that correspond to the 
   2D projection.  There is an arbitrary scale factor that depends upon how
   you want to display the points; you can scale these points with a multiplicative
   factor and the relative relationships will still be preserved.

   One can also call:

   PTS2D = VIEWPOINT3DTO2D(PTS3D)

   which takes the CAMERAMATRIX to be the current VIEW in the current axes.


   See also: VIEW