int game_update(int mousedx, int mousedy)
{
const uint8_t* keys = SDL_GetKeyboardState(NULL);
double rot = mousedx*PLAYER_ROTSPEED;
if (keys[SDL_SCANCODE_LEFT])
rot -= 10*PLAYER_ROTSPEED;
if (keys[SDL_SCANCODE_RIGHT])
rot += 10*PLAYER_ROTSPEED;
vec2_rotate(&player.dir, rot, &player.dir);
vec2_t dir = {0, 0};
double spd = PLAYER_MOVESPEED;
if (keys[SDL_SCANCODE_LCTRL])
spd *= .1;
if (keys[SDL_SCANCODE_LSHIFT])
spd *= 10.;
vec2_t dirCrossed = {player.dir.y, -player.dir.x};
if (keys[SDL_SCANCODE_W] || keys[SDL_SCANCODE_UP])
vec2_add(&dir, &player.dir, &dir);
if (keys[SDL_SCANCODE_S] || keys[SDL_SCANCODE_DOWN])
vec2_addScale(&dir, &player.dir, -1, &dir);
if (keys[SDL_SCANCODE_A])
vec2_addScale(&dir, &dirCrossed, -1, &dir);
if (keys[SDL_SCANCODE_D])
vec2_add(&dir, &dirCrossed, &dir);
if (vec2_lengthSq(&dir) > 0.00001)
{
vec2_normalize(&dir, &dir);
camera_t cam = player;
cam.dir = dir;
raycast_travel(&cam, spd, &m);
player.pos = cam.pos;
}
return keys[SDL_SCANCODE_ESCAPE];
}
double vec2_length(vec2_t* v)
{
return sqrt(vec2_lengthSq(v));
}
