/******************************************************************************
 *
 * 9998sketch/global.h
 *
 * (c) Eugene K. Ressler, Jr. 2004, 2005
 *
 * A program related to the book
 *
 * Fundamentals of Virtual World Simulation
 * by Eugene K. Ressler, Jr.
 *
 * No warranty of correctness or capability of any kind is expressed or implied.
 *
 * The author grants free use of this code for any purpose as long any text,
 * executable program, library file, or source code distributed to others 
 * and employing any portion of this code clearly cites the book named above.
 *
 ******************************************************************************/

#ifndef __GLOBAL_H
#define __GLOBAL_H

#include "opts.h"
#include "error.h"
#include "geometry.h"

#define GE_EXTENT           0
#define GE_BASELINE         1
#define GE_OPTS             2
#define GE_FRAME            3
#define GE_SPLIT            4
#define GE_CAMERA           8
#define GE_OUTPUT_LANGUAGE  9

// these must match table in opt.c and global.c
#define GEOL_PSTRICKS       0
#define GEOL_TIKZ           1

// this must match string table in global.c
extern char *output_language_str[];

typedef struct global_env_t {
  unsigned set_p_mask;
  OPTS opts[1];
  POINT_3D bb1, bb2; // bounding box 
  char *frame_opts;  // null if frame has none
  FLOAT baseline;
  int split_p;
  TRANSFORM camera;
  int output_language;
} GLOBAL_ENV;

#define global_env_is_set_p(Env, F) ((Env)->set_p_mask & bit(F))

void init_global_env(GLOBAL_ENV *env);
void set_global_baseline(GLOBAL_ENV *env, FLOAT baseline, SRC_LINE line);
#define NO_BASELINE FLT_MAX
void set_global_env_extent(GLOBAL_ENV *env, POINT_3D p1, POINT_3D p2, SRC_LINE line);
int get_transformed_global_env_extent(BOX_3D *extent, GLOBAL_ENV *env);
void set_global_env_opts(GLOBAL_ENV *env, char *opt_str, SRC_LINE line);
void set_global_env_frame(GLOBAL_ENV *env, char *opt_str, SRC_LINE line);
void set_global_env_camera(GLOBAL_ENV *env, TRANSFORM camera, SRC_LINE line);
void set_global_output_language(GLOBAL_ENV *env, int output_language, SRC_LINE line);
int get_global_output_language(int *output_language, GLOBAL_ENV *env);

extern GLOBAL_ENV __the_global_env[1];

#define global_env  __the_global_env

#endif