*GeometryType = 4 is used for view point projection, GeometryType = 6 is used for Crasters Parabolic Projection
2.2 Frame packing for cubemap projection
When the input or output geometry is the cubemap format (that is, InputGeometryType = 1 or
CodingGeometryType = 1), the respective configuration parameters SourceFPStructure and
CodingFPStructure are used to specify the frame packing arrangement of the input and/or cubemap faces.
The six faces of a cubemap are illustrated in Figure 1(a), and Figure 1(b) shows the 2D uv coordinates
system used to store the cubemap faces: u is the horizontal axis and v is the vertical axis in the frame
memory. As will be discussed below, each of the cubemap faces may be rotated by a multiple of 90⁰
before being stored in the output frame packed image. Figure 1(b) illustrates how each of the six cubemap
faces will be stored in the output frame packed image if no rotation is applied (that is, 0⁰ rotation). When
90⁰, 180⁰, or 270⁰ rotation is applied to a given face, that face will be rotated counter-clockwise based on
the orientation of the uv axes. The tool supports cubemap conversion from one frame packing
arrangement to another frame packing arrangement.