Use macros to use Segment2s when necessary.

[btb/d2x.git] / main / editor / editor.h

/* $Id: editor.h,v 1.5 2004-12-24 05:17:09 btb Exp $ */
/*
THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX
SOFTWARE CORPORATION ("PARALLAX").  PARALLAX, IN DISTRIBUTING THE CODE TO
END-USERS, AND SUBJECT TO ALL OF THE TERMS AND CONDITIONS HEREIN, GRANTS A
ROYALTY-FREE, PERPETUAL LICENSE TO SUCH END-USERS FOR USE BY SUCH END-USERS
IN USING, DISPLAYING,  AND CREATING DERIVATIVE WORKS THEREOF, SO LONG AS
SUCH USE, DISPLAY OR CREATION IS FOR NON-COMMERCIAL, ROYALTY OR REVENUE
FREE PURPOSES.  IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE
CONTAINED HEREIN FOR REVENUE-BEARING PURPOSES.  THE END-USER UNDERSTANDS
AND AGREES TO THE TERMS HEREIN AND ACCEPTS THE SAME BY USE OF THIS FILE.
COPYRIGHT 1993-1999 PARALLAX SOFTWARE CORPORATION.  ALL RIGHTS RESERVED.
*/

/*
 *
 * FIXME: put description here
 *
 */

#ifndef _EDITOR_H
#define _EDITOR_H

#include "vecmat.h"
#include "segment.h"
#include "inferno.h"
#include "gr.h"
#include "ui.h"

/*
 * Constants
 *
 */

#define ORTHO_VIEWS 0                   // set to 1 to enable 3 orthogonal views
#define ED_SCREEN_W     800             //width of editor screen
#define ED_SCREEN_H     600             //height of editor screen

#define MENUBAR_H               16

#define GAMEVIEW_X      1               //where the 320x200 game window goes
#define GAMEVIEW_Y      1+MENUBAR_H
#define GAMEVIEW_W      320
#define GAMEVIEW_H      200

#define STATUS_X        0
#define STATUS_H        18
#define STATUS_Y        (ED_SCREEN_H-STATUS_H)
#define STATUS_W        ED_SCREEN_W

#define LVIEW_X 1                       //large view
#define LVIEW_Y (GAMEVIEW_Y+GAMEVIEW_H+2)
#define LVIEW_W 447
#define LVIEW_H (STATUS_Y-LVIEW_Y-2)

#define TMAPBOX_X       (LVIEW_X+LVIEW_W+4)     //location of first one
#define TMAPBOX_Y       (LVIEW_Y+2)
#define TMAPBOX_W       64
#define TMAPBOX_H       64

#define TMAPCURBOX_X (TMAPBOX_X + 4*(TMAPBOX_W + 3))
#define TMAPCURBOX_Y (TMAPBOX_Y + TMAPBOX_H)

#define OBJCURBOX_X (TMAPCURBOX_X)
#define OBJCURBOX_Y (TMAPCURBOX_Y + 3*(TMAPBOX_H + 2) -40)

#define PAD_X (GAMEVIEW_X + GAMEVIEW_W + 16)
#define PAD_Y (GAMEVIEW_Y + 4)

#define SMALLVIEW_W     173             //width of small view windows
#define SMALLVIEW_H     148             //height of small view windows

#define TVIEW_X (LVIEW_X+LVIEW_W+2)             //top view
#define TVIEW_Y LVIEW_Y
#define TVIEW_W SMALLVIEW_W
#define TVIEW_H SMALLVIEW_H

#define FVIEW_X TVIEW_X                                         //front view
#define FVIEW_Y (TVIEW_Y+SMALLVIEW_H+2)
#define FVIEW_W SMALLVIEW_W
#define FVIEW_H SMALLVIEW_H

#define RVIEW_X (TVIEW_X+SMALLVIEW_W+2) //right view
#define RVIEW_Y FVIEW_Y 
#define RVIEW_W SMALLVIEW_W
#define RVIEW_H SMALLVIEW_H

#define GVIEW_X RVIEW_X                                         //group view
#define GVIEW_Y TVIEW_Y 
#define GVIEW_W SMALLVIEW_W
#define GVIEW_H SMALLVIEW_H

//there were color constants here, but I moved them to meddraw.c - Matt

#define SEGMOVE_PAD_ID          0
#define SEGSIZE_PAD_ID          1
#define CURVE_PAD_ID            2       
#define TEXTURE_PAD_ID          3
#define OBJECT_PAD_ID           4
#define OBJMOV_PAD_ID           5
#define GROUP_PAD_ID            6
#define LIGHTING_PAD_ID 7
#define TEST_PAD_ID                     8
#define MAX_PAD_ID                      8

/*
 * Strucures
 * 
 */

#define VF_ANGLES 0
#define VF_MATRIX 1

// Default size of a segment
#define DEFAULT_X_SIZE          F1_0*20
#define DEFAULT_Y_SIZE          F1_0*20
#define DEFAULT_Z_SIZE          F1_0*20

//      Scale factor from 3d units (integer portion) to uv coordinates (integer portion)
#define VMAG    (F1_0 / (DEFAULT_X_SIZE/F1_0))
#define UMAG    VMAG            // unused

//      Number of segments which can be found (size of Found_segs[])
#define MAX_FOUND_SEGS          200
#define MAX_SELECTED_SEGS       (MAX_SEGMENTS)
#define MAX_WARNING_SEGS        (MAX_SEGMENTS)

#define MAX_GROUPS                      10
#define ROT_GROUP                       MAX_GROUPS

//      Modes for segment sizing
#define SEGSIZEMODE_FREE                1
#define SEGSIZEMODE_ALL                 2
#define SEGSIZEMODE_CURSIDE     3
#define SEGSIZEMODE_EDGE                4
#define SEGSIZEMODE_VERTEX              5

#define SEGSIZEMODE_MIN                 SEGSIZEMODE_FREE
#define SEGSIZEMODE_MAX                 SEGSIZEMODE_VERTEX

//defines a view for an editor window
typedef struct editor_view {
        short ev_num;                           //each view has it's own number
        short ev_changed;                       //set to true if view changed
        grs_canvas *ev_canv;            //points to this window's canvas
        fix ev_dist;                            //the distance from the view point
        vms_matrix ev_matrix;   //the view matrix
        fix ev_zoom;                            //zoom for this window
} editor_view;

/*
 * Global variables
 * 
 */

extern editor_view *Views[];
extern int N_views;
extern grs_canvas *canv_offscreen;              //for off-screen rendering
extern int Large_view_index;
extern UI_GADGET_USERBOX * LargeViewBox;
extern int Found_seg_index;                             // Index in Found_segs corresponding to Cursegp
extern int gamestate_not_restored;


extern  segment  *Cursegp;                              // Pointer to current segment in the mine, the one to which things happen.
#define Curseg2p s2s2(Cursegp)          // Pointer to segment2 for Cursegp

extern  vms_vector Ed_view_target;              // what editor is looking at

// -- extern    segment  New_segment;                   // The segment which can be added to the mine.
#define New_segment     (Segments[MAX_SEGMENTS-1])

extern  int             Curside;                                        // Side index in 0..MAX_SIDES_PER_SEGMENT of active side.
extern  int             Curedge;                                        //      Current edge on current side, in 0..3
extern  int             Curvert;                                        //      Current vertex on current side, in 0..3
extern  int             AttachSide;                             //      Side on segment to attach
extern  int             Draw_all_segments;      // Set to 1 means draw_world draws all segments in Segments, else draw only connected segments
extern  segment *Markedsegp;                    // Marked segment, used in conjunction with *Cursegp to form joints.
extern  int             Markedside;                             // Marked side on Markedsegp.
extern  sbyte   Vertex_active[MAX_VERTICES]; // !0 means vertex is in use, 0 means not in use.

extern  grs_canvas *Pad_text_canvas;            // Keypad text

// The extra group in the following arrays is used for group rotation.
extern  group           GroupList[MAX_GROUPS+1];
extern  segment  *Groupsegp[MAX_GROUPS+1];
extern  int             Groupside[MAX_GROUPS+1];
extern  int             current_group;
extern  int             num_groups; 
extern  int             Current_group;

extern  short           Found_segs[];                   // List of segment numbers "found" under cursor click
extern  int             N_found_segs;                   // Number of segments found at Found_segs

extern  int             N_selected_segs;                // Number of segments found at Selected_segs
extern  short           Selected_segs[];                // List of segment numbers currently selected

extern  int             N_warning_segs;         // Number of segments warning-worthy, such as a concave segment
extern  short           Warning_segs[];         // List of warning-worthy segments

extern  int             Show_axes_flag;         // 0 = don't show, !0 = do show coordinate axes in *Cursegp orientation

extern   int            Autosave_count;         // Current counter for which autosave mine we are "on"
extern  int             Autosave_flag;                  // Whether or not Autosave is on.
extern  struct tm Editor_time_of_day;

extern  int             SegSizeMode;                    // Mode = 0/1 = not/is legal to move bound vertices, 

void init_editor(void);
void editor(void);
void close_editor(void);
void init_editor_screen(void);

//      Returns true if vertex vi is contained in exactly one segment, else returns false.
extern int is_free_vertex(int vi);

//      Set existing vertex vnum to value *vp.
extern  int med_set_vertex(int vnum,vms_vector *vp);

extern void med_combine_duplicate_vertices(sbyte *vlp);

// Attach side newside of newseg to side destside of destseg.
// Copies *newseg into global array Segments, increments Num_segments.
// Forms a weld between the two segments by making the new segment fit to the old segment.
// Updates number of faces per side if necessitated by new vertex coordinates.
// Return value:
//  0 = successful attach
//  1 = No room in Segments[].
//  2 = No room in Vertices[].
extern  int med_attach_segment(segment *destseg, segment *newseg, int destside, int newside);

// Delete a segment.
// Deletes a segment from the global array Segments.
// Updates Cursegp to be the segment to which the deleted segment was connected.  If there is
//      more than one connected segment, the new Cursegp will be the segment with the highest index
//      of connection in the deleted segment (highest index = front)
// Return value:
//  0 = successful deletion
//  1 = unable to delete
extern  int med_delete_segment(segment *sp);

// Rotate the segment *seg by the pitch, bank, heading defined by *rot, destructively
// modifying its four free vertices in the global array Vertices.
// It is illegal to rotate a segment which has MAX_SIDES_PER_SEGMENT != 1.
// Pitch, bank, heading are about the point which is the average of the four points
// forming the side of connection.
// Return value:
//  0 = successful rotation
//  1 = MAX_SIDES_PER_SEGMENT makes rotation illegal (connected to 0 or 2+ segments)
//  2 = Rotation causes degeneracy, such as self-intersecting segment.
extern  int med_rotate_segment(segment *seg, vms_matrix *rotmat);
extern  int med_rotate_segment_ang(segment *seg, vms_angvec *ang);

// Scales a segment, destructively modifying vertex coordinates in global Vertices[].
//      Uses scale factor in sp->scale.
//      Modifies only free vertices (those which are not part of a segment other than *sp).
// The vector *svp contains the x,y,z scale factors.  The x,y,z directions are relative
// to the segment.  x scales in the dimension of the right vector, y of the up vector, z of the forward vector.
// The dimension of the vectors is determined by averaging appropriate sets of 4 of the 8 points.
extern void med_scale_segment(segment *sp);

// Loads mine *name from disk, updating global variables:
//    Segments, Vertices
//    Num_segments,Num_vertices
//    Cursegp = pointer to active segment.  Written as an index in med_save_mine, converted to a pointer
//              at load time.
// Returns:
//  0 = successfully loaded.
//  1 = unable to load.
extern  int med_load_mine(char *name);

// Loads game *name from disk.
// This function automatically loads mine with name.MIN 
extern  int med_load_game(char *name);


// Loads a previous generation mine.  Needs to be updated in code. 
extern  int med_load_pmine(char *name);

// Saves mine contained in Segments[] and Vertices[].
// Num_segments = number of segments in mine.
// Num_vertices = number of vertices in mine.
// Cursegp = current segment.
// Saves Num_segments, and index of current segment (which is Cursegp - Segments), which will be converted to a pointer
// and written to Cursegp in med_load_mine.
// Returns:
//  0 = successfully saved.
//  1 = unable to save.
extern  int med_save_mine(char *name);

// Loads group *filename from disk.
//      Adds group to global Segments and Vertices array.
//      Returns:
//       0 = successfully loaded.
//       1 = unable to load.
extern  int med_load_group( char *filename, short *vertex_ids, short *segment_ids, int *num_vertices, int *num_segments);

// Saves group *filename from disk.
//      Saves group defined by vertex_ids and segment_ids to disk. 
//      Returns:
//       0 = successfully saved.
//       1 = unable to save.
extern  int med_save_group( char *filename, short *vertex_ids, short *segment_ids, int num_vertices, int num_segments);

// Updates the screen... (I put the prototype here for curves.c)
extern   int medlisp_update_screen();

// Returns 0 if no error, 1 if error, whatever that might be.
// Sets globals:
//    Num_segments
//    Num_vertices
//    Cursegp = pointer to only segment.
extern  int create_new_mine(void);

// extern       void med_create_segment(segment *sp, vms_vector *scale);
extern  void old_med_attach_segment(segment *sp,int main_side,int branch_side,fix cx, fix cy, fix cz, fix length, fix width, fix height, vms_matrix *mp);

// Copy a segment from *ssp to *dsp.  Do not simply copy the struct.  Use *dsp's vertices, copying in
//      just the values, not the indices.
extern  void med_copy_segment(segment *dsp,segment *ssp);

//      Create a default segment.
//      Useful for when user creates a garbage segment.
extern  void med_create_default_segment(segment *sp);

//      Create New_segment with sizes found in *scale.
extern  void med_create_new_segment(vms_vector *scale);

//      Create New_segment with sizes found in Cursegp.
extern void med_create_new_segment_from_cursegp(void);

//      Update New_segment using scale factors.
extern  void med_update_new_segment(void);

//      Replace *sp with New_segment.
extern  void med_update_segment(segment *sp);

//      Create a new segment and use it to form a bridge between two existing segments.
//      Specify two segment:side pairs.  If either segment:side is not open (ie, segment->children[side] != -1)
//      then it is not legal to form the brider.
//      Return:
//              0       bridge segment formed
//              1       unable to form bridge because one (or both) of the sides is not open.
//      Note that no new vertices are created by this process.
extern  int med_form_bridge_segment(segment *seg1, int side1, segment *seg2, int side2);

//      Compress mine at Segments and Vertices by squeezing out all holes.
//      If no holes (ie, an unused segment followed by a used segment), then no action.
//      If Cursegp or Markedsegp is a segment which gets moved to fill in a hole, then
//      they are properly updated.
extern  void med_compress_mine(void);

//      Extract the forward vector from segment *sp, return in *vp.
//      The forward vector is defined to be the vector from the the center of the front face of the segment
// to the center of the back face of the segment.
extern  void med_extract_forward_vector_from_segment(segment *sp,vms_vector *vp);

//      Extract the right vector from segment *sp, return in *vp.
//      The forward vector is defined to be the vector from the the center of the left face of the segment
// to the center of the right face of the segment.
extern  void med_extract_right_vector_from_segment(segment *sp,vms_vector *vp);

//      Extract the up vector from segment *sp, return in *vp.
//      The forward vector is defined to be the vector from the the center of the bottom face of the segment
// to the center of the top face of the segment.
extern  void med_extract_up_vector_from_segment(segment *sp,vms_vector *vp);

// Compute the center point of a side of a segment.
//      The center point is defined to be the average of the 4 points defining the side.
extern  void med_compute_center_point_on_side(vms_vector *vp,segment *sp,int side);

extern void     set_matrix_based_on_side(vms_matrix *rotmat,int destside);

// Given a forward vector, compute and return an angvec triple.
//      [ THIS SHOULD BE MOVED TO THE VECTOR MATRIX LIBRARY ]
extern  vms_angvec *vm_vec_to_angles(vms_angvec *result, vms_vector *forvec);


// Curves stuff.

#define ACCURACY 0.1*F1_0

typedef struct vms_equation {
    union {
            struct {fix x3, x2, x1, x0, y3, y2, y1, y0, z3, z2, z1, z0;};
            fix xyz[3][4];
    };
} vms_equation;

extern void create_curve(vms_vector *p1, vms_vector *p4, vms_vector *r1, vms_vector *r4, vms_equation *coeffs);
// Q(t) = (2t^3 - 3t^2 + 1) p1 + (-2t^3 + 3t^2) p4 + (t^3 - 2t^2 + t) r1 + (t^3 - t^2 ) r4

extern vms_vector evaluate_curve(vms_equation *coeffs, int degree, fix t);

extern fix curve_dist(vms_equation *coeffs, int degree, fix t0, vms_vector *p0, fix dist);

extern void curve_dir(vms_equation *coeffs, int degree, fix t0, vms_vector *dir);

extern void plot_parametric(vms_equation *coeffs, fix min_t, fix max_t, fix del_t);

// Curve generation routine.
// Returns 1 if curve is generated.
// Returns 0 if no curve.
extern int generate_curve( fix r1scale, fix r4scale );

// Deletes existing curve generated in generate_curve().
extern void delete_curve();

// --- // -- Temporary function, identical to med_rotate_segment, but it takes a vector instead of an angvec
// --- extern   int med_rotate_segment_vec(segment *seg, vms_vector *vec);

extern  void med_extract_matrix_from_segment(segment *sp,vms_matrix *rotmat);

//      Assign default u,v coordinates to all sides of a segment.
//      This routine should only be used for segments which are not connected to anything else,
//      ie the segment created at mine creation.
extern  void assign_default_uvs_to_segment(segment *segp);
extern  void assign_default_uvs_to_side(segment *segp, int side);

extern  void assign_default_uvs_to_side(segment *segp,int side);

//      Assign u,v coordinates to con_seg, con_common_side from base_seg, base_common_side
//      They are connected at the edge defined by the vertices abs_id1, abs_id2.
extern  void med_assign_uvs_to_side(segment *con_seg, int con_common_side, segment *base_seg, int base_common_side, int abs_id1, int abs_id2);

// Debug -- show a matrix.
//      type: 0 --> mprintf, 1 --> printf
//      *s = string to display
//      *mp = matrix to display
extern  void show_matrix(char *s,vms_matrix *mp,int type);

//      Create coordinate axes in orientation of specified segment, stores vertices at *vp.
extern  void create_coordinate_axes_from_segment(segment *sp,short *vertnums);

//      Scale a segment.  Then, if it is connected to something, rotate it.
extern  int med_scale_and_rotate_segment(segment *seg, vms_angvec *rot);

//      Set Vertex_active to number of occurrences of each vertex.
//      Set Num_vertices.
extern  void set_vertex_counts(void);

//      Modify seg2 to share side2 with seg1:side1.  This forms a connection between
//      two segments without creating a new segment.  It modifies seg2 by sharing
//      vertices from seg1.  seg1 is not modified.  Four vertices from seg2 are
//      deleted.
//      If the four vertices forming side2 in seg2 are not free, the joint is not formed.
//      Return code:
//              0                       joint formed
//              1                       unable to form joint because one or more vertices of side2 is not free
//              2                       unable to form joint because side1 is already used
extern  int med_form_joint(segment *seg1, int side1, segment *seg2, int side2);

// The current texture... use by saying something=bm_lock_bitmap(CurrentTexture)
extern int CurrentTexture;

extern void compute_segment_center(vms_vector *vp,segment *sp);

extern void med_propagate_tmaps_to_segments(segment *base_seg,segment *con_seg, int uv_only_flag);

extern void med_propagate_tmaps_to_back_side(segment *base_seg, int back_side, int uv_only_flag);

extern void med_propagate_tmaps_to_any_side(segment *base_seg, int back_side, int tmap_num, int uv_only_flag);

//      Find segment adjacent to sp:side.
//      Adjacent means a segment which shares all four vertices.
//      Return true if segment found and fill in segment in adj_sp and side in adj_side.
//      Return false if unable to find, in which case adj_sp and adj_side are undefined.
extern int med_find_adjacent_segment_side(segment *sp, int side, segment **adj_sp, int *adj_side);

// Finds the closest segment and side to sp:side.
extern int med_find_closest_threshold_segment_side(segment *sp, int side, segment **adj_sp, int *adj_side, fix threshold);

//      Given two segments, return the side index in the connecting segment which connects to the base segment
extern int find_connect_side(segment *base_seg, segment *con_seg);

// Select previous segment.
//      If there is a connection on the side opposite to the current side, then choose that segment.
// If there is no connecting segment on the opposite face, try any segment.
extern void get_previous_segment(int curseg_num, int curside,int *newseg_num, int *newside);

// Select next segment.
//      If there is a connection on the current side, then choose that segment.
// If there is no connecting segment on the current side, try any segment.
extern void get_next_segment(int curseg_num, int curside, int *newseg_num, int *newside);

//      Copy texture maps in newseg to nsp.
extern void copy_uvs_seg_to_seg(segment *nsp,segment *newseg);

//      Return true if segment is concave.
extern int check_seg_concavity(segment *s);

//      Return N_found_segs = number of concave segments in mine.
//      Segment ids stored at Found_segs
extern void find_concave_segs(void);

//      High level call.  Check for concave segments, print warning message (using editor_status)
//      if any concave segments.
//      Calls find_concave_segs, therefore N_found_segs gets set, and Found_segs filled in.
extern void warn_if_concave_segments(void);

//      Warn if segment s is concave.
extern void warn_if_concave_segment(segment *s);

//      Add a vertex to the vertex list.
extern int med_add_vertex(vms_vector *vp);

//      Add a vertex to the vertex list which may be identical to another vertex (in terms of coordinates).
//      Don't scan list, looking for presence of a vertex with same coords, add this one.
extern int med_create_duplicate_vertex(vms_vector *vp);

//      Create a new segment, duplicating exactly, including vertex ids and children, the passed segment.
extern int med_create_duplicate_segment(segment *sp);

//      Returns the index of a free segment.
//      Scans the Segments array.
extern int get_free_segment_number(void);

//      Diagnostic message.
extern void diagnostic_message(const char *format, ... );

//      Status Icon.
extern void print_status_icon( char icon[1], int position );
extern void clear_status_icon( char icon[1], int position );

//      Editor status message.
extern void editor_status(const char *format, ... );

// Variables in editor.c that the k*.c files need

#define UF_NONE             0x000       //nothing has changed
#define UF_WORLD_CHANGED    0x001       //something added or deleted
#define UF_VIEWPOINT_MOVED  0x002       //what we're watching has moved

#define UF_GAME_VIEW_CHANGED 0x004              //the game window changed    
#define UF_ED_STATE_CHANGED  0x008              //something like curside,curseg changed

#define UF_ALL                                  0xffffffff  //all flags

extern uint        Update_flags;
extern int         Funky_chase_mode;
extern vms_angvec  Seg_orientation;
extern vms_vector  Seg_scale;
extern int         mine_changed;
extern int         ModeFlag;
extern editor_view *current_view;

//the view for the different windows
extern editor_view LargeView;
extern editor_view TopView;
extern editor_view FrontView;
extern editor_view RightView;

extern void set_view_target_from_segment(segment *sp);
extern int SafetyCheck();

extern void editor_status( const char *format, ...);

extern int MacroNumEvents;
extern int MacroStatus;

//extern        int     Highest_vertex_index;                   // Highest index in Vertices and Vertex_active, an efficiency hack
//extern        int     Highest_segment_index;                  // Highest index in Segments, an efficiency hack
extern  int     Lock_view_to_cursegp;                   // !0 means whenever cursegp changes, view it

//      eglobal.c
extern  int     Num_tilings;                                            // number of tilings/wall
extern  int     Degenerate_segment_found;

extern  sbyte Been_visited[];                   // List of segments visited in a recursive search, if element n set, segment n done been visited

// Initializes autosave system.
// Sets global Autosave_count to 0.
extern void init_autosave(void);

// Closes autosave system.
// Deletes all autosaved files.
extern void close_autosave(void);

// Saves current mine to name.miX where name = suffix of mine name and X = Autosave_count.
// For example, if name = "cookie.min", and Autosave_count = 3, then writes "cookie.mi3".
// Increments Autosave_count, wrapping from 9 to 0.
// (If there is no current mine name, assume "temp.min")
// Call med_save_mine to save the mine.
extern void autosave_mine(char *name);

// Timed autosave
extern void TimedAutosave(char *name);
extern void set_editor_time_of_day();

// Undo function
extern int undo(void);
extern char mine_filename[128];
extern char undo_status[10][100];

//      group.c
int AttachSegmentNewAng(vms_angvec *pbh);
int RotateSegmentNew(vms_angvec *pbh);
int rotate_segment_new(vms_angvec *pbh);

//get & free vertices
int alloc_vert();
void free_vert(int vert_num);

// The current robot type declared in eglobal.c
extern int Cur_robot_type;

//      From med.c
extern int DisplayCurrentRobotType(void);
extern short                    Cur_object_index;

extern int render_3d_in_big_window;
extern void move_object_to_mouse_click(void);

//these are instances of canvases, pointed to by variables below
extern grs_canvas _canv_editor_game;            //the game on the editor screen

//these are pointers to our canvases
extern grs_canvas *Canv_editor;                 //the editor screen
extern grs_canvas *Canv_editor_game; //the game on the editor screen

extern grs_canvas *canv_offscreen;              //for off-screen rendering
extern grs_canvas *Pad_text_canvas;             // Keypad text

//where the editor is looking
extern vms_vector Ed_view_target;

extern int gamestate_not_restored;

extern UI_WINDOW * EditorWindow;

extern int     Large_view_index;

extern UI_GADGET_USERBOX * GameViewBox;
extern UI_GADGET_USERBOX * LargeViewBox;
extern UI_GADGET_USERBOX * GroupViewBox;

extern void med_point_2_vec(grs_canvas *canv,vms_vector *v,short sx,short sy);

//shutdown ui on the editor screen
void close_editor_screen(void);

//      From eobject.c
extern int place_object(segment *segp, vms_vector *object_pos, int object_type);

// from ksegsize.c
extern void med_extract_up_vector_from_segment_side(segment *sp, int sidenum, vms_vector *vp);
extern void med_extract_right_vector_from_segment_side(segment *sp, int sidenum, vms_vector *vp);
extern void med_extract_forward_vector_from_segment_side(segment *sp, int sidenum, vms_vector *vp);

//      In medmisc.c
extern void draw_world_from_game(void);

//      In medrobot.c
extern void close_all_windows(void);

//      In seguvs.c

//      Amount to stretch a texture map by.
//      The two different ones are for the two dimensions of a texture map.
extern fix Stretch_scale_x, Stretch_scale_y;

#endif