Linux Manuals session 3

vpStoreRawVolume, 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; Arguments vpc VolPack context from vpCreateContext. fd File descriptor from open(2), open…

vpShadeTable – compute the contents of the shading lookup table Synopsis #include <volpack.h> vpResult vpShadeTable(vpc) vpContext *vpc; Arguments vpc VolPack context from vpCreateContext. Description vpShadeTable computes the contents of the shading lookup table previously specified with vpLookupShader. For each entry in the table, the Phong shading equation is evaluated using the current lighting properties (as…

vpSeti, vpSetd – set the value of an option Synopsis #include <volpack.h> vpResult vpSeti(vpc, option, value) vpContext *vpc; int option; int value; vpResult vpSetd(vpc, option, value) vpContext *vpc; int option; double value; Arguments vpc VolPack context from vpCreateContext. option Constant that specifies the option to be set. value New value for the option. Description These…

vpSetVoxelSize – define the size of a voxel Synopsis #include <volpack.h> vpResult vpSetVoxelSize(vpc, bytes_per_voxel, num_voxel_fields, num_shade_fields, num_classify_fields) vpContext *vpc; int bytes_per_voxel; int num_voxel_fields; int num_shade_fields; int num_classify_fields; Arguments vpc VolPack context from vpCreateContext. bytes_per_voxel Size of one voxel in bytes. num_voxel_fields Number of fields in a voxel. num_shade_fields Number of voxel fields that are arguments…

vpSetVoxelField, vpFieldOffset – define the size and location of a voxel field Synopsis #include <volpack.h> vpResult vpSetVoxelField(vpc, field_num, field_size, field_offset, field_max) vpContext *vpc; int field_num; int field_size; int field_offset; int field_max; int vpFieldOffset(voxel_ptr, field_name) vpContext *vpc; LITERAL field_name; Arguments vpc VolPack context from vpCreateContext. field_num Field number for the field to define (first field is…

vpSetVolumeSize – define the dimensions of a volume Synopsis #include <volpack.h> vpResult vpSetVolumeSize(vpc, xlen, ylen, zlen) vpContext *vpc; int xlen, ylen, zlen; Arguments vpc VolPack context from vpCreateContext. xlen Size of first dimension of the volume in voxels. ylen Size of the second dimension of the volume in voxels. zlen Size of the third dimension…

vpSetShadowLookupShader – specify shading lookup tables for rendering shadows Synopsis #include <volpack.h> vpResult vpSetShadowLookupShader(vpc, color_channels, num_materials, color_field, color_table, color_table_size, weight_field, weight_table, weight_table_size, shadow_table, shadow_table_size) vpContext *vpc; int color_channels, num_materials; int color_field; float *color_table; int color_table_size; int weight_field; float *weight_table; int weight_table_size; float *shadow_table; int shadow_table_size; Arguments vpc VolPack context from vpCreateContext. color_channels The number of…

vpSetRawVoxels – specify an array of volume data Synopsis #include <volpack.h> vpResult vpSetRawVoxels(vpc, voxels, size, xstride, ystride, zstride) vpContext *vpc; void *voxels; int size; int xstride, ystride, zstride; Arguments vpc VolPack context from vpCreateContext. voxels 3D array of voxels. size Size of the voxel array in bytes. xstride Number of bytes from the beginning of…

vpSetMatrix – load a matrix into the current transformation matrix Synopsis #include <volpack.h> vpResult vpSetMatrix(vpc, m) vpContext *vpc; vpMatrix4 m; Arguments vpc VolPack context from vpCreateContext. m Input matrix. Description vpSetMatrix is used to load a 4-by-4 transformation matrix into the current transformation matrix. Use vpCurrentMatrix to set the current transformation matrix. State Variables The…

vpSetMaterial – set material properties Synopsis #include <volpack.h> vpResult vpSetMaterial(vpc, material, property, surface_side, r, g, b) vpContext *vpc; int material; int property; int surface_side; double r, g, b; Arguments vpc VolPack context from vpCreateContext. material A constant specifying a particular material number (VP_MATERIAL0, VP_MATERIAL1, …, VP_MATERIAL5). property A constant specifying one material property (VP_AMBIENT, VP_DIFFUSE,…

vpSetLookupShader – specify shading lookup tables Synopsis #include <volpack.h> vpResult vpSetLookupShader(vpc, color_channels, num_materials, color_field, color_table, color_table_size, weight_field, weight_table, weight_table_size) vpContext *vpc; int color_channels, num_materials; int color_field; float *color_table; int color_table_size; int weight_field; float *weight_table; int weight_table_size; Arguments vpc VolPack context from vpCreateContext. color_channels The number of color channels per pixel (1 or 3). num_materials The…

vpSetLight – set lighting properties Synopsis #include <volpack.h> vpResult vpSetLight(vpc, light_num, property, n0, n1, n2) vpContext *vpc; int light_num; int property; double n0, n1, n2; Arguments vpc VolPack context from vpCreateContext. light_num A constant specifying a particular light source (VP_LIGHT0, VP_LIGHT1, …, VP_LIGHT5). property A constant specifying one lighting property (VP_COLOR or VP_DIRECTION). n0, n1,…

vpSetImage – specify an image array Synopsis #include <volpack.h> vpResult vpSetImage(vpc, image, width, height, scan_bytes, pixel_type) vpContext *vpc; unsigned char *image; int width, height; int scan_bytes; int pixel_type; Arguments vpc VolPack context from vpCreateContext. image 2D array for storing result images. width Width of image in pixels. height Height of image in pixels. scan_bytes Number…

vpSetFilter – define a resampling filter Synopsis #include <volpack.h> vpResult vpSetFilter(vpc, num_taps, num_phases, weights) vpContext *vpc; int num_taps, num_phases; float *weights; Arguments vpc VolPack context from vpCreateContext. num_taps Number of filter taps. num_phases Number of filter phases. weights Array containing filter weights. Description vpSetFilter is used to specify a table of filter weights before resampling…

vpSetDepthCueing – set depth cueing parameters Synopsis #include <volpack.h> vpResult vpSetDepthCueing(vpc, front_factor, density) vpContext *vpc; double front_factor; double density; Arguments vpc VolPack context from vpCreateContext. front_factor Depth cueing factor at the front clipping plane. density Fog density. Description vpSetDepthCueing is used to set the parameters for depth cueing. Depth cueing is a simulated fog that…

vpSetDebug – enable/disable debugging options Synopsis #include <volpack.h> vpResult vpSetDebug(vpc, flag, value) vpContext *vpc; int flag; int value; Arguments vpc VolPack context from vpCreateContext. flag Constant that specifies the debugging option to be adjusted. value New value for the option (boolean: 0 or 1). Description vpSetDebug is used to enable or disable a debugging option…

vpSetClientData – define a client data pointer Synopsis #include <volpack.h> vpResult vpSetClientData(vpc, client_data) vpContext *vpc; void *client_data; Arguments vpc VolPack context from vpCreateContext. client_data Pointer to application-specific client data. Description vpSetClientData is used to store a pointer to application-specific client data in the VolPack context. This pointer is passed to some of the callback routines…

vpSetClassifierTable – specify an opacity transfer function Synopsis #include <volpack.h> vpResult vpSetClassifierTable(vpc, param_num, param_field, table, table_size) vpContext *vpc; int param_num, param_field; float *table; int table_size; Arguments vpc VolPack context from vpCreateContext. param_num Parameter number identifying one parameter of the opacity transfer function. param_field Field number identifying a voxel field that contains the parameter. table Lookup…

vpSetCallback – define a callback function Synopsis #include <volpack.h> vpResult vpSetCallback(vpc, option, func) vpContext *vpc; int option; void (*func)(); Arguments vpc VolPack context from vpCreateContext. option A code specifying which callback function to set. func A pointer to the callback function. Description vpSetCallback is used to set a callback function. The following list gives the…

vpScanlineNormals – compute surface normal vectors and gradient magnitudes for a scanline Synopsis #include <volpack.h> vpResult vpScanlineNormals(vpc, length, scalar_data, scalar_minus_y, scalar_plus_y, scalar_minus_z, scalar_plus_z, voxel_data, scalar_field, grad_field, norm_field) vpContext *vpc; int length; unsigned char *scalar_data; unsigned char *scalar_minus_y, *scalar_plus_y; unsigned char *scalar_minus_z, *scalar_plus_z; void *voxel_data; int scalar_field; int grad_field; int norm_field; Arguments vpc VolPack context from…