src/client/camera.c

   1 #include <math.h>
   2 #include "client/client.h"
   3 #include "client/camera.h"
   4
   5 struct Camera camera;
   6
   7 static const vec3 world_up = {0.0f, 1.0f, 0.0f};
   8
   9 static void camera_update()
  10 {
  11         vec3 center;
  12         vec3_add(center, camera.eye, camera.front);
  13
  14         mat4x4_look_at(camera.view, camera.eye, center, camera.up);
  15 }
  16
  17 void camera_set_position(v3f32 pos)
  18 {
  19         camera.eye[0] = pos.x;
  20         camera.eye[1] = pos.y;
  21         camera.eye[2] = pos.z;
  22
  23         camera_update();
  24 }
  25
  26 void camera_set_angle(f32 yaw, f32 pitch)
  27 {
  28         camera.front[0] = camera.movement_dirs.front[0] = cos(yaw) * cos(pitch);
  29         camera.front[1] = sin(pitch);
  30         camera.front[2] = camera.movement_dirs.front[2] = sin(yaw) * cos(pitch);
  31
  32         vec3_norm(camera.front, camera.front);
  33         vec3_norm(camera.movement_dirs.front, camera.movement_dirs.front);
  34
  35         vec3_mul_cross(camera.right, camera.front, world_up);
  36         camera.movement_dirs.right[0] = camera.right[0];
  37         camera.movement_dirs.right[2] = camera.right[2];
  38
  39         vec3_norm(camera.right, camera.right);
  40         vec3_norm(camera.movement_dirs.right, camera.movement_dirs.right);
  41
  42         vec3_mul_cross(camera.up, camera.right, camera.front);
  43         vec3_norm(camera.up, camera.up);
  44
  45         camera.movement_dirs.up[0] = world_up[0];
  46         camera.movement_dirs.up[1] = world_up[1];
  47         camera.movement_dirs.up[2] = world_up[2];
  48
  49         camera_update();
  50 }