src/client/camera.c

   1 #include <math.h>
   2 #include "client/client.h"
   3 #include "client/camera.h"
   4
   5 static struct
   6 {
   7         mat4x4 view;
   8         vec3 eye, front, right, up;
   9 } camera;
  10
  11 static vec3 world_up = {0.0f, 1.0f, 0.0f};
  12
  13 struct camera_movement_dirs camera_movement_dirs;
  14
  15 static void camera_update()
  16 {
  17         vec3 center;
  18         vec3_add(center, camera.eye, camera.front);
  19
  20         mat4x4_look_at(camera.view, camera.eye, center, camera.up);
  21 }
  22
  23 void camera_enable(GLint loc_view)
  24 {
  25         glUniformMatrix4fv(loc_view, 1, GL_FALSE, camera.view[0]);
  26 }
  27
  28 void camera_set_position(v3f pos)
  29 {
  30         camera.eye[0] = pos.x;
  31         camera.eye[1] = pos.y;
  32         camera.eye[2] = pos.z;
  33
  34         camera_update();
  35 }
  36
  37 void camera_set_angle(f32 yaw, f32 pitch)
  38 {
  39         camera.front[0] = camera_movement_dirs.front[0] = cos(yaw) * cos(pitch);
  40         camera.front[1] = sin(pitch);
  41         camera.front[2] = camera_movement_dirs.front[2] = sin(yaw) * cos(pitch);
  42
  43         vec3_norm(camera.front, camera.front);
  44         vec3_norm(camera_movement_dirs.front, camera_movement_dirs.front);
  45
  46         vec3_mul_cross(camera.right, camera.front, world_up);
  47         camera_movement_dirs.right[0] = camera.right[0];
  48         camera_movement_dirs.right[2] = camera.right[2];
  49
  50         vec3_norm(camera.right, camera.right);
  51         vec3_norm(camera_movement_dirs.right, camera_movement_dirs.right);
  52
  53         vec3_mul_cross(camera.up, camera.right, camera.front);
  54         vec3_norm(camera.up, camera.up);
  55
  56         camera_update();
  57 }