void GameScreen::Update(const float time_step)
{
player.Update(time_step);
bool game_over = false;
//Update asteroids checking them against player and lasers
BSphere player_sphere = player.GetBSphere();
std::list<Asteroid*>::iterator iter = asteroids.begin();
while(iter != asteroids.end())
{
Asteroid* ast = iter._Ptr->_Myval;
ast->Update(time_step);
//Check asteroid is in the play region
//if not reset it
if(!play_region.Contains(ast->GetBSphere()))
{
//Move the asteroid elsewhere
RepositionAsteroid(ast);
}
//check against the player
if(player_sphere.Contains(ast->GetBSphere()))
{
//player.AddScore(ast->GetBSphere().GetRadius());
game_over = true;
}
iter++;
}
//Do some laser-asteroid checking
player.CheckLaserAsteroidCollisions(&asteroids);
asteroid_spawn_countdown -= time_step;
if(asteroid_spawn_countdown < 0 && asteroids.size() < MAX_ASTEROIDS)
{
asteroid_spawn_countdown = ASTEROID_SPAWN_INTERVAL;
SpawnAsteroid();
}
if(game_over)
{
GameOverScreen *gameover_screen = new GameOverScreen();
gameover_screen->Initialise(player.GetScore());
RustyLib::Framework::ScreenManagement::ScreenManager::Instance().ChangeScreen(
gameover_screen);
}
}
void Player::CheckLaserAsteroidCollisions(std::list<Asteroid*>* asteroids)
{
std::list<Asteroid*>::iterator a_iter = asteroids->begin();
std::list<Asteroid*> a_tbd;
std::list<Laser*> l_tbd;
while(a_iter != asteroids->end())
{
Asteroid *ast = a_iter._Ptr->_Myval;
std::list<Laser*>::iterator l_iter = lasers.begin();
while(l_iter != lasers.end())
{
Laser *las = l_iter._Ptr->_Myval;
if(ast->GetBSphere().Contains(las->GetPosition()))
{
//The laser is inside the asteroid bsphere
a_tbd.push_back(ast);
l_tbd.push_back(las);
AddScore(ast->GetBSphere().GetRadius());
}
l_iter++;
}
a_iter++;
}
//Do the deletions
std::list<Laser*>::iterator l_iter = l_tbd.begin();
while(l_iter != l_tbd.end())
{
lasers.remove(l_iter._Ptr->_Myval);
l_iter++;
}
a_iter = a_tbd.begin();
while(a_iter != a_tbd.end())
{
asteroids->remove(a_iter._Ptr->_Myval);
a_iter++;
}
}