include/trails.h

   1 /*
   2  * $Logfile: /Freespace2/code/Weapon/Trails.h $
   3  * $Revision$
   4  * $Date$
   5  * $Author$
   6  *
   7  * External defs for missile trail stuff
   8  *
   9  * $Log$
  10  * Revision 1.1  2002/05/03 03:28:12  root
  11  * Initial revision
  12  *
  13  *
  14  * 3     11/14/98 5:33p Dave
  15  * Lots of nebula work. Put in ship contrails.
  16  *
  17  * 2     10/07/98 10:54a Dave
  18  * Initial checkin.
  19  *
  20  * 1     10/07/98 10:51a Dave
  21  *
  22  * 3     3/23/98 5:00p John
  23  * Improved missile trails.  Made smooth alpha under hardware.  Made end
  24  * taper.  Made trail touch weapon.
  25  *
  26  * 2     12/21/97 6:15p John
  27  * Made a seperate system for missile trails
  28  *
  29  * 1     12/21/97 5:30p John
  30  * Initial version
  31  *
  32  * $NoKeywords: $
  33  */
  34
  35 #ifndef _TRAILS_H
  36 #define _TRAILS_H
  37
  38 #include "pstypes.h"
  39
  40 #define NUM_TRAIL_SECTIONS 16
  41
  42 // contrail info - similar to that for missile trails
  43 // place this inside of info structures instead of explicit structs (eg. ship_info instead of ship, or weapon_info instead of weapon)
  44 typedef struct trail_info {
  45         vector pt;                              // offset from the object's center
  46         float w_start;                  // starting width
  47         float w_end;                    // ending width
  48         float a_start;                  // starting alpha
  49         float a_end;                    // ending alpha
  50         float max_life;         // max_life for a section
  51         int stamp;                              // spew timestamp
  52         int bitmap;                             // bitmap to use
  53 } trail_info;
  54
  55 // Call at start of level to reinit all missilie trail stuff
  56 void trail_level_init();
  57
  58 // Needs to be called from somewhere to move the trails each frame
  59 void trail_move_all(float frametime);
  60
  61 // Needs to be called from somewhere to render the trails each frame
  62 void trail_render_all();
  63
  64 // The following functions are what the weapon code calls
  65 // to deal with trails:
  66
  67 // Returns -1 if failed
  68 int trail_create(trail_info info);
  69 void trail_add_segment( int trail_num, vector *pos );
  70 void trail_set_segment( int trail_num, vector *pos );
  71 void trail_object_died( int trail_num );
  72 int trail_stamp_elapsed( int trail_num );
  73 void trail_set_stamp( int trail_num );
  74
  75 #endif //_TRAILS_H
  76