A VAPOR VDC is associated with a single three-dimensional volume. Its extents are described by minimum and maximum X, Y, and Z coordinates, i.e. the volume is a box bounded by 6 axis-aligned planes. Within the full data extents, users may specify various sub-boxes of the full domain which describe the data that is visualized. The region panel specifies a 3-dimensional box that is used for volume rendering, isosurfaces, and flow integration. Additional boxes include: A 3-dimensional "rake" in the flow panel specifies the location of seed points used to initialize flow integration. Another rake, the "barb rake" specifies the location of vectors in barb visualization. The 2D panel and the Image panel each have 2-dimensional boxes identifying the location of data to be visualized. The probe supports a two or three-dimensional box that can be oriented in any direction for constructing contour planes and sampling data in the scene. The contour panel supports either a 3D rotatable box or a 2D horizontal box, depending on whether a 3D or 2D variable is being visualized. Boxes can also be used to resize and position colorbars that are enabled in Vapor's Visualizer Features option list, by setting the Colorbar mouse mode.
