examples/bassteroids/source/gamecontroller.cpp

   1 #include "gamecontroller.h"
   2 #include <stdexcept>
   3 #include <msp/game/root.h>
   4 #include <msp/game/transform.h>
   5
   6 using namespace std;
   7 using namespace Msp;
   8
   9 GameController::GameController(Game::Stage &s):
  10         System(s),
  11         asteroid_setup{ .physical={ .body={ .mass=200 }, .collider={ .type=ColliderType::CIRCLE, .radius=3.0f } },
  12                 .mesh={ .object_name="Asteroid 1.object" }}
  13 { }
  14
  15 void GameController::tick(Time::TimeDelta)
  16 {
  17         switch(state)
  18         {
  19         case LEVEL_START:
  20                 defer([this]{
  21                         uniform_real_distribution<float> sdist(-1, 1);
  22                         uniform_real_distribution<float> udist(0, 1);
  23                         for(unsigned i=0; i<level+2; ++i)
  24                         {
  25                                 asteroids.emplace_back(stage.get_root(), asteroid_setup);
  26                                 asteroids.back()->get_transform()->set_position({ sdist(rng)*32, sdist(rng)*18, 0.0f });
  27                                 Geometry::Angle<float> angle = Geometry::Angle<float>::from_turns(udist(rng));
  28                                 float speed = udist(rng)*7;
  29                                 asteroids.back()->get_body()->set_velocity({ cos(angle)*speed, sin(angle)*speed });
  30                         }
  31                         state = PLAYING;
  32                 });
  33                 break;
  34         case PLAYING:
  35                 break;
  36         default:
  37                 throw logic_error("Unimplemented state");
  38         }
  39 }