Games/XInvaders3D/camera.h

   1 /*------------------------------------------------------------------
   2   camera.h:
   3
   4     XINVADERS 3D - 3d Shoot'em up
   5     Copyright (C) 2000 Don Llopis
   6
   7     This program is free software; you can redistribute it and/or modify
   8     it under the terms of the GNU General Public License as published by
   9     the Free Software Foundation; either version 2 of the License, or
  10     (at your option) any later version.
  11
  12     This program is distributed in the hope that it will be useful,
  13     but WITHOUT ANY WARRANTY; without even the implied warranty of
  14     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15     GNU General Public License for more details.
  16
  17     You should have received a copy of the GNU General Public License
  18     along with this program; if not, write to the Free Software
  19     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20
  21 ------------------------------------------------------------------*/
  22 #ifndef CAMERA
  23 #define CAMERA
  24
  25
  26 #ifdef NEW_CAMERA
  27
  28 typedef struct CAMERASTRUCT CAMERA;
  29 struct CAMERASTRUCT
  30 {
  31    MATRIX4 local;
  32    MATRIX4 world;
  33
  34    VECTOR4 up;
  35    VECTOR4 from;
  36    VECTOR4 at;
  37
  38    VECTOR4 follow_offset;
  39
  40    float scr_width;
  41    float scr_height;
  42    float fov;
  43
  44    OBJECT *follow_obj;
  45 };
  46
  47 /* new camera interface */
  48
  49 extern CAMERA * Camera_new ( void );
  50 extern void Camera_delete ( CAMERA *cam );
  51 extern void Camera_init ( CAMERA *cam, float width, float height, float fov );
  52 extern void Camera_project_point ( CAMERA *cam, long pt[2] );
  53 extern void Camera_project_points ( CAMERA *cam, long pts[], int n );
  54 extern void Camera_transform ( CAMERA *cam, VECTOR4 up, VECTOR4 from, VECTOR4 at );
  55 extern void Camera_follow_obj ( CAMERA *cam, GOBJECT *obj );
  56 extern void Camera_set_follow_offset ( CAMERA *cam, VECTOR4 from );
  57 extern void Camera_update ( CAMERA *cam );
  58
  59 #endif
  60
  61 /* old camera interface */
  62
  63 extern void Camera_init ( unsigned int width, unsigned int height, float fov );
  64 extern void Camera_project_point ( VECTOR4 a, int b[2] );
  65 extern void Camera_project_points ( VECTOR4 a[], int b[], int n );
  66 extern void Camera_transform ( MATRIX4 r, VECTOR4 up, VECTOR4 from, VECTOR4 at );
  67
  68 #endif