STORE(3) - man page online | library functions
Store volume data structures.
vpStoreRawVolume(3) Library Functions Manual vpStoreRawVolume(3)
NAMEvpStoreRawVolume, vpStoreMinMaxOctree, vpStoreClassifiedVolume, vpStoreContext - store volume data structures to a file
SYNOPSIS#include <volpack.h> vpResult vpStoreRawVolume(vpc, fd) vpContext *vpc; int fd; vpResult vpStoreMinMaxOctree(vpc, fd) vpContext *vpc; int fd; vpResult vpStoreClassifiedVolume(vpc, fd) vpContext *vpc; int fd; vpResult vpStoreContext(vpc, fd) vpContext *vpc; int fd;
ARGUMENTSvpc VolPack context from vpCreateContext. fd File descriptor from open(2), open for writing.
DESCRIPTIONThese functions are used to store volume data structures from a rendering context into files in the format read by the VolPack file reading routines (see vpLoadRawVolume(3)). vpStoreRawVolume creates a 3D voxel array file. The file includes information about the size of the volume and the layout of the voxels as well as the volume data itself. vpStoreMinMaxOctree creates a min-max octree file. The file includes information about the size of the volume and the layout of the voxels as well as the octree itself. vpStoreClassifiedVolume creates a preclassified volume data file. The file includes information about the size of the volume and the layout of the voxels as well as the vol‐ ume data itself. vpStoreContext creates a rendering context file. The file includes all rendering parame‐ ters except volume data and callback functions. The contents of any lookup tables for shading and classification are also stored. The function used to write data to the files can be set by calling vpSetCallback with the VP_WRITE_FUNC option. This could be used to implement a file-compression system, for example.
STATE VARIABLESThe current file I/O parameters can be retrieved with the following state variable codes (see vpGeti(3)): VP_WRITE_FUNC.
ERRORSThe normal return value is VP_OK. The following error return values are possible: VPERROR_IO The file writing function returned an error value (in which case the external vari‐ able errno should contain an operating-system specific error code), or the file system is full. VPERROR_BAD_VOLUME The volume dimensions are invalid, or there is no voxel data in the context. VPERROR_BAD_SIZE There is no min-max octree in the volume (vpStoreMinMaxOctree only). VPERROR_BAD_VOXEL The voxel fields in the rendering context have not been properly defined.
SEE ALSOVolPack(3), vpCreateContext(3), vpLoadRawVolume(3)
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|refer to||open(2) | VolPack(3)|