BStream.h

Contains definitions of global variables, functions and enumerated types.

The HOOPS/Stream Toolkit utilizes several global enumerated types. The functions which black box support for writing and reading HOOPS Stream Files are also global, and are defined in BStream.h

Content

Macro definitions

`__wchar_t`
`BBINFILETK_API2`
`BBINFILETK_API`
`TK_File_Format_Version`
`TK_DEFAULT_BUFFER_SIZE`	default amount of the internal memory buffer used for file processing
`ID_Key`
`alter`	complementary to const, indicates we thought about it instead of a forgotten “const”

Functions

`Swap()`
`TK_Read_Stream_File()`	Reads a HOOPS Stream File.
`TK_Read_Stream_File()`	Reads a HOOPS Stream File.
`TK_Read_Stream_File()`
`TK_Read_Stream_File()`
`TK_Read_Stream_File()`	Deprecated ; reads a HOOPS Stream File

Enumerators

`TK_Status`	Codes which can be either passed to various toolkit functions, or indicate the result of a toolkit function call.
`TK_File_Write_Options`	Options which control how the HOOPS Stream File is generated.
`TK_Dictionary_Options`
`TK_File_Read_Options`
`TK_Debug_Logging_Options`
`TK_General_Flags`

Macro definitions

__wchar_t

BBINFILETK_API2

BBINFILETK_API

TK_File_Format_Version: the HSF specification version that this toolkit supports (along with any previous versions)

TK_DEFAULT_BUFFER_SIZE: default amount of the internal memory buffer used for file processing

ID_Key: ID_Key is just a pointer sized long integer by which it is assumed that the graphics system can uniquely identify its contents. Declared as 64-bit on win64 systems because a long is not big enough to store a pointer there (unlike all other 64-bit systems we have supported in the past

alter: complementary to const, indicates we thought about it instead of a forgotten “const”

Functions

template<typename T> void Swap(T &a, T &b)

Warning

doxygenfunction: Unable to resolve function “TK_Read_Stream_File” with arguments None in doxygen xml output for project “3dgs_stream” from directory: /hoops_3df/documentation/build/html/../doxygen/3dgs_stream/xml. Potential matches:

- TK_Status TK_Read_Stream_File(char const *filename, BStreamFileToolkit *tk)
- TK_Status TK_Read_Stream_File(char const *filename, int flags = 0)
- TK_Status TK_Read_Stream_File(char const *filename, int flags, BStreamFileToolkit *tk)
- TK_Status TK_Read_Stream_File(wchar_t const *filename, BStreamFileToolkit *tk)
- TK_Status TK_Read_Stream_File(wchar_t const *filename, int flags = 0)

Warning

doxygenfunction: Unable to resolve function “TK_Read_Stream_File” with arguments None in doxygen xml output for project “3dgs_stream” from directory: /hoops_3df/documentation/build/html/../doxygen/3dgs_stream/xml. Potential matches:

- TK_Status TK_Read_Stream_File(char const *filename, BStreamFileToolkit *tk)
- TK_Status TK_Read_Stream_File(char const *filename, int flags = 0)
- TK_Status TK_Read_Stream_File(char const *filename, int flags, BStreamFileToolkit *tk)
- TK_Status TK_Read_Stream_File(wchar_t const *filename, BStreamFileToolkit *tk)
- TK_Status TK_Read_Stream_File(wchar_t const *filename, int flags = 0)

Warning

doxygenfunction: Unable to resolve function “TK_Read_Stream_File” with arguments None in doxygen xml output for project “3dgs_stream” from directory: /hoops_3df/documentation/build/html/../doxygen/3dgs_stream/xml. Potential matches:

- TK_Status TK_Read_Stream_File(char const *filename, BStreamFileToolkit *tk)
- TK_Status TK_Read_Stream_File(char const *filename, int flags = 0)
- TK_Status TK_Read_Stream_File(char const *filename, int flags, BStreamFileToolkit *tk)
- TK_Status TK_Read_Stream_File(wchar_t const *filename, BStreamFileToolkit *tk)
- TK_Status TK_Read_Stream_File(wchar_t const *filename, int flags = 0)

Warning

doxygenfunction: Unable to resolve function “TK_Read_Stream_File” with arguments None in doxygen xml output for project “3dgs_stream” from directory: /hoops_3df/documentation/build/html/../doxygen/3dgs_stream/xml. Potential matches:

- TK_Status TK_Read_Stream_File(char const *filename, BStreamFileToolkit *tk)
- TK_Status TK_Read_Stream_File(char const *filename, int flags = 0)
- TK_Status TK_Read_Stream_File(char const *filename, int flags, BStreamFileToolkit *tk)
- TK_Status TK_Read_Stream_File(wchar_t const *filename, BStreamFileToolkit *tk)
- TK_Status TK_Read_Stream_File(wchar_t const *filename, int flags = 0)

Warning

doxygenfunction: Unable to resolve function “TK_Read_Stream_File” with arguments None in doxygen xml output for project “3dgs_stream” from directory: /hoops_3df/documentation/build/html/../doxygen/3dgs_stream/xml. Potential matches:

- TK_Status TK_Read_Stream_File(char const *filename, BStreamFileToolkit *tk)
- TK_Status TK_Read_Stream_File(char const *filename, int flags = 0)
- TK_Status TK_Read_Stream_File(char const *filename, int flags, BStreamFileToolkit *tk)
- TK_Status TK_Read_Stream_File(wchar_t const *filename, BStreamFileToolkit *tk)
- TK_Status TK_Read_Stream_File(wchar_t const *filename, int flags = 0)

Enumerators

enum TK_Status

Codes which can be either passed to various toolkit functions, or indicate the result of a toolkit function call.

Various toolkit functions can take arguments which control processing behavior. Most functions also provide a return value of type TK_Status to indicate success, failure or other information about processing status.

Values:

enumerator TK_Normal: When used as input: read through to a ‘termination’ code. When used as output: function call succeeded

enumerator TK_Error: A return value; function call failed

enumerator TK_Pause: An input value; instructs toolkit to stop reading at a ‘pause’ code

enumerator TK_Single: An input value; instructs toolkit to stop reading after the first object is completed

enumerator TK_Pending: A return value; the toolkit is waiting for (needs) more data

enumerator TK_Revisit: A return value; interpret function succeeded, but we will run it through again later

enumerator TK_Complete: A return value; processing is complete

enumerator TK_Version: A return value; version mis-match detected, processing halted

enumerator TK_NotFound: A return value; failed to find a match

enumerator TK_Abort: A return value; non-fatal error. callback requested stop, or fall back to plan B (internal)

enumerator TK_LibraryNotFound: A return value; Indicates that an external dependency for reading a file (e.g. a material library) was required but not found.

enum TK_File_Write_Options

Options which control how the HOOPS Stream File is generated.

An HSF file has a variety of properties, and the toolkit utilizes default logic when generating a file. This enumerated type gives the user high-level control over file compression, tagging and content. These options are set by calling BStreamFileToolkit::SetWriteFlags

Values:

enumerator TK_Suppress_LOD: No LODS are exported, only the original shells are written out (single pass); implicitly disables dictionary

enumerator TK_Full_Resolution_Vertices: Data fidelity is required for geometry; this causes the full single-precision floating point information to be exported; does not affect LODs or lossless compression of connectivity information

enumerator TK_Full_Resolution_Normals: Data fidelity is required for normals; as in above description of TK_Full_Resolution_Points

enumerator TK_First_LOD_Is_Bounding_Box: Adds a new LOD to represent the lowest resolution of objects, which is a bounding box representation

enumerator TK_Force_Tags: All appropriate objects (geometries,segments,includes) will be tagged

enumerator TK_Disable_Priority_Heuristic: Disables organization of multiresolution objects according to heuristic cost/benifit.

enumerator TK_Disable_Global_Compression: Inline lossless compression will not be used

enumerator TK_Disable_Instancing: Object instancing will not be used

enumerator TK_Generate_Dictionary: Enables random-access by creation of the file dictionary

enumerator TK_Connectivity_Compression: Enables connectivity compression

enumerator TK_Disable_Tristrips: Disables triangle strips, and the triangulation it requires, in shells. Incurs a heavy read-time computational cost.

enumerator TK_Disable_Compound_Primitives: Disables the use of OpcodeHandlers that encode multiple primitives (since they cannot be properly tagged)

enumerator TK_Global_Quantization: Causes any required quantization to be global (bbox of scene) instead of local (bbox of individual geometry) . Regardless of this flag, however, local quantization applies until the first TKE_Bounding_Info. HStreamFiletoolkit sends a TKE_Bounding_Info automatically, but BStreamFiletoolkit does not.

enumerator TK_Full_Resolution_Parameters: Data fidelity is required for parameters (a.k.a texture coordinates); as in above description of TK_Full_Resolution_Points

enumerator TK_Full_Resolution_Colors: Data fidelity is required for vertex/face colors; as in above description of TK_Full_Resolution_Points

enumerator TK_Full_Resolution_Index_Colors: Data fidelity is required for vertex/face colors-by-index; as in above description of TK_Full_Resolution_Points

enumerator TK_Communicator_Mode: Alters HSF Export for easier web viewer parsing

enumerator TK_Disable_Custom_Shader: Disables custom shaders.

enumerator TK_Full_Resolution: for convenience, a combination of 5 other options.

enum TK_Dictionary_Options

This enumerated type gives the user control of specific options to include if a dictionary is generated

Values:

enumerator TK_Dictionary_Bounding_Volumes: dictionary entries include bounding volume info

enum TK_File_Read_Options

Options which control how the HOOPS Stream File is read

Values:

enumerator TK_Flag_Unhandled_Opcodes: Instructs toolkit to return an error for opcodes which are not handled by a custom toolkit during reading; the default is to silently skip over unhandled opcodes

enumerator TK_Ignore_Version: Version checking will be bypassed

enumerator TK_Skip_External_References: TKE_External_Reference filespecs will not be read (the strings will still be stored in toolkit by the default handler)

enumerator TK_Ignore_Bounding_LODs: Instructs the toolkit to ignore any explicit bounding box lods included in the stream file

enumerator TK_Disable_Deferal: Instructs the toolkit to do thing in order rather than reordering as desired.

enum TK_Debug_Logging_Options

Options which control what data is collected when creating a debug log

Values:

enumerator TK_Logging_Sequence: Record sequence numbers

enumerator TK_Logging_Tagging: Record tag indices

enumerator TK_Logging_Segment_Names: Record segment names

enum TK_General_Flags

General flags which may be used by many opcodes

Values:

enumerator TK_Double_Precision: entity is double precision

enumerator TK_Has_Condition: entity has an associated condition

enumerator TK_Has_Filter: entity has an associated filter

enumerator TK_Has_Custody: entity has an owning interest in its referee

enumerator TK_UTF8_Strings: entity string(s) are UTF8 rather than (presumably) ISO Latin-1