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Public Member Functions | List of all members
EggWriter Class Reference

This is the base class for a program that generates an egg file output, but doesn't read any for input. More...

`#include "eggWriter.h"`

Inheritance diagram for EggWriter:

## Public Member Functions
| EggWriter (bool allow_last_param=false, bool allow_stdout=true)
| Egg-writing type programs may specify their output file using either the last-filename convention, the -o convention, and/or implicitly writing the result to standard output.
virtual EggWriter * | as_writer ()
| Returns this object as an EggWriter pointer, if it is in fact an EggWriter, or NULL if it is not.
virtual void | post_process_egg_file ()
| Performs any processing of the egg file that is appropriate before writing it out.
void | write_egg_file ()
| Writes out the egg file as the normal result of the program.
Public Member Functions inherited from EggSingleBase
virtual EggReader * | as_reader ()
| Returns this object as an EggReader pointer, if it is in fact an EggReader, or NULL if it is not.
Public Member Functions inherited from EggBase
void | add_normals_options ()
| Adds -no, -np, etc.
void | add_points_options ()
| Adds -points as a valid option for this program.
void | add_transform_options ()
| Adds -TS, -TT, etc.
Public Member Functions inherited from ProgramBase
| ProgramBase (const std::string &name=std::string())
std::string | get_exec_command () const
| Returns the command that invoked this program, as a shell-friendly string, suitable for pasting into the comments of output files.
virtual void | parse_command_line (int argc, char **argv)
| Dispatches on each of the options on the command line, and passes the remaining parameters to handle_args().
void | show_description ()
| Writes the program description to stderr.
void | show_options ()
| Describes each of the available options to stderr.
void | show_text (const std::string &prefix, int indent_width, std::string text)
| Formats the indicated text and its prefix for output to stderr with the known _terminal_width.
void | show_text (const std::string &text)
| Formats the indicated text to stderr with the known _terminal_width.
void | show_usage ()
| Writes the usage line(s) to stderr.
void | write_man_page (std::ostream &out)
| Generates a man page in nroff syntax based on the description and options.
Public Member Functions inherited from WithOutputFile
| WithOutputFile (bool allow_last_param, bool allow_stdout, bool binary_output)
void | close_output ()
| Closes the output stream previously opened by get_output().
std::ostream & | get_output ()
| Returns an output stream that corresponds to the user's intended egg file output–either stdout, or the named output file.
Filename | get_output_filename () const
| If has_output_filename() returns true, this is the filename that the user specified.
bool | has_output_filename () const
| Returns true if the user specified an output filename, false otherwise (e.g.

## Additional Inherited Members
Public Types inherited from ProgramBase
typedef pdeque< std::string > | Args
Static Public Member Functions inherited from EggBase
static void | convert_paths (EggNode *node, PathReplace *path_replace, const DSearchPath &additional_path)
| Recursively walks the egg hierarchy.
Public Attributes inherited from ProgramBase
Args | _program_args
Filename | _program_name

## Detailed Description

This is the base class for a program that generates an egg file output, but doesn't read any for input.

Definition at line 28 of file eggWriter.h.

## Constructor & Destructor Documentation

## ◆ EggWriter()

EggWriter::EggWriter | ( | bool | allow_last_param = false,
|  | bool | allow_stdout = true )

Egg-writing type programs may specify their output file using either the last-filename convention, the -o convention, and/or implicitly writing the result to standard output.

Not all interfaces are appropriate for all applications; some may be confusing or dangerous.

The calling application should pass allow_last_param true to allow the user to specify the output filename as the last parameter on the command line (the most dangerous, but convenient, method), and allow_stdout true to allow the user to omit the output filename altogether and have the output implicitly go to standard output (not terribly dangerous, but inappropriate when writing binary file formats).

Definition at line 33 of file eggWriter.cxx.

Referenced by as_writer().

## Member Function Documentation

## ◆ as_writer()

EggWriter * EggWriter::as_writer | ( |  | ) |
| virtual

Returns this object as an EggWriter pointer, if it is in fact an EggWriter, or NULL if it is not.

This is intended to work around the C++ limitation that prevents downcasts past virtual inheritance. Since both EggReader and EggWriter inherit virtually from EggSingleBase, we need functions like this to downcast to the appropriate pointer.

Reimplemented from EggSingleBase.

Definition at line 97 of file eggWriter.cxx.

References EggWriter().

## ◆ post_process_egg_file()

void EggWriter::post_process_egg_file | ( |  | ) |
| virtual

Performs any processing of the egg file that is appropriate before writing it out.

This includes any normal adjustments the user requested via -np, etc.

Normally, you should not need to call this function directly; write_egg_file() calls it for you. You should call this only if you do not use write_egg_file() to write out the resulting egg file.

Definition at line 111 of file eggWriter.cxx.

Referenced by write_egg_file().

## ◆ write_egg_file()

void EggWriter::write_egg_file | ( |  | ) |

Writes out the egg file as the normal result of the program.

This calls post_process_egg_file() to perform any last minute processing (like normal computation) and then writes out the file to the output stream returned by get_output().

Definition at line 176 of file eggWriter.cxx.

References WithOutputFile::get_output(), and post_process_egg_file().

The documentation for this class was generated from the following files:

- pandatool/src/eggbase/eggWriter.h
- pandatool/src/eggbase/eggWriter.cxx