src/graphics/camera.c

   1 /************************************************************************
   2 * camera.c
   3 * voxelands - 3d voxel world sandbox game
   4 * Copyright (C) Lisa 'darkrose' Milne 2016 <lisa@ltmnet.com>
   5 *
   6 * This program is free software: you can redistribute it and/or modify
   7 * it under the terms of the GNU General Public License as published by
   8 * the Free Software Foundation, either version 3 of the License, or
   9 * (at your option) any later version.
  10 *
  11 * This program is distributed in the hope that it will be useful, but
  12 * WITHOUT ANY WARRANTY; without even the implied warranty of
  13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  14 * See the GNU General Public License for more details.
  15 *
  16 * You should have received a copy of the GNU General Public License
  17 * along with this program.  If not, see <http://www.gnu.org/licenses/>
  18 ************************************************************************/
  19
  20 #include "common.h"
  21 #define _WM_EXPOSE_ALL
  22 #include "wm.h"
  23
  24 static camera_t camera = {
  25         0.0,
  26         0.0,
  27         0.0,
  28         0.0,
  29         0.0
  30 };
  31
  32 /* move to the camera position */
  33 void camera_view_matrix(matrix_t *mat, camera_t *cam)
  34 {
  35         if (!cam)
  36                 cam = &camera;
  37         matrix_init(mat);
  38         matrix_translate(mat,-cam->x, -cam->y, -cam->z);
  39         matrix_rotate_deg_y(mat,-cam->yaw);
  40         matrix_rotate_deg_x(mat,cam->pitch);
  41 }
  42
  43 /* get the camera data */
  44 camera_t *camera_get()
  45 {
  46         return &camera;
  47 }
  48
  49 /* set the position of the camera */
  50 void camera_set_pos(v3_t *p)
  51 {
  52         camera.x = p->x;
  53         camera.y = p->y;
  54         camera.z = p->z;
  55 }
  56
  57 /* set the yaw - y rotation - of the camera */
  58 void camera_set_yaw(GLfloat yaw)
  59 {
  60         camera.yaw = yaw;
  61 }
  62
  63 /* set the pitch - x rotation - of the camera */
  64 void camera_set_pitch(GLfloat pitch)
  65 {
  66         camera.pitch = pitch;
  67 }