XRacer::BVRML3pm

Usage

  use XRacer::BVRML;

Overview

This is a parser for a tiny subset of VRML generated by Blender, so called Blender-VRML or BVRML. In fact, this parser is by no means guaranteed to be able to parse everything that Blender could generate. I will add parsing capability to it as I see the need.

"XRacer::BVRML" parses a Blender VRML file, and stores it in an internal world representation, which can be inspected and manipulated. "XRacer::BVRML" can also write out a C function containing GL commands which render this world object, and this function can then be used inside an XRacer track or craft file.

Class methods

$world = XRacer::BVRML->parse ($filename [, $world]);

This function parses a BVRML file called $filename, and generates a $world object. If the second optional $world parameter is given, then the BVRML file is parsed and the results are merged with the existing $world object.

If the parsing fails, then this function will print an error message and return "undef".

World object methods

$nr_vertices = $world->nr_vertices;

Return the total number of vertices in the world.

$nr_faces = $world->nr_faces;

Return the total number of faces in the world.

@vertices = $world->vertices;

Aggregate all vertices in the world, and return it as a list.

@faces = $world->faces;

Aggregate all faces in the world, and return it as a list.

($smallest_x, $largest_x, $smallest_y, $largest_y, $smallest_z, $largest_z) = $world->bbox;

Return the bounding box (or bounding cuboid, to be more precise) of this world.

$world->write_display_function ([name => $function_name,] [filehandle => $filehandle,] [decl => $decl]);

Write out a C function containing GL calls which, when invoked, will display this world object. The C function is called $function_name and will be written to the file specified by the $filehandle. The function will be declared as "void function_name (void)" unless the $decl parameter is given, which gives the return declaration. The C function is suitable for directly linking into XRacer craft and track files. However, it requires some support. In particular, you will need to include the header file GL/gl.h, and probably xracer.h before the function.