examples/bassteroids/source/playercontroller.cpp

   1 #include "playercontroller.h"
   2 #include <msp/game/root.h>
   3 #include <msp/game/stage.h>
   4 #include "controls.h"
   5
   6 using namespace std;
   7 using namespace Msp;
   8
   9 PlayerController::PlayerController(Game::Stage &s):
  10         System(s),
  11         player_setup(stage.get_resources().get<ShipSetup>("player.ship.setup")),
  12         bullet_setup(stage.get_resources().get<BulletSetup>("quaver.bullet.setup"))
  13 {
  14         declare_dependency<Game::Transform>(READ_OLD);
  15         declare_dependency<RigidBody>(UPDATE);
  16 }
  17
  18 void PlayerController::set_controls(Controls *c)
  19 {
  20         controls = c;
  21         if(!player_ship)
  22                 player_ship = Game::Owned<Ship>(stage.get_root(), player_setup);
  23 }
  24
  25 void PlayerController::tick(Time::TimeDelta dt)
  26 {
  27         if(!controls)
  28                 return;
  29
  30         float dt_secs = dt/Time::sec;
  31
  32         const Ship::Setup &setup = player_ship->get_setup();
  33         float thrust = setup.speed*setup.speed;
  34         float torque = setup.turn_rate*setup.turn_rate;
  35
  36         Game::Handle<Game::Transform> transform = player_ship->get_transform();
  37         LinAl::Vector<float, 2> fwd_dir = normalize(transform->get_world_matrix().column(0).slice<2>(0));
  38         Game::Handle<RigidBody> body = player_ship->get_body();
  39
  40         body->add_force(fwd_dir*(controls->forward.get_value()*thrust));
  41         const LinAl::Vector<float, 2> &velocity = body->get_velocity();
  42         float speed = velocity.norm();
  43         if(speed>1e-5)
  44                 body->add_force(velocity*-min(speed+setup.speed/speed, 1.0f/dt_secs));
  45
  46         body->add_torque(controls->turn_left.get_value()*torque);
  47         Geometry::Angle<float> angular_vel = body->get_angular_velocity();
  48         Geometry::Angle<float> angular_speed = abs(angular_vel);
  49         if(abs(angular_speed.radians())>1e-5)
  50                 body->add_torque(angular_vel.radians()*-min(angular_speed.radians()+setup.turn_rate/angular_speed.radians(), 1.0f/dt_secs));
  51
  52         if(controls->fire.was_pressed())
  53                 defer([this]{ fire(); });
  54
  55         controls->reset_edges();
  56 }
  57
  58 void PlayerController::deferred_tick()
  59 {
  60         System::deferred_tick();
  61         erase_if(bullets, [](Game::Handle<Bullet> b){ return !b->get_hitpoints()->is_alive(); });
  62 }
  63
  64 void PlayerController::fire()
  65 {
  66         Game::Handle<Game::Transform> player_tf = player_ship->get_transform();
  67         Game::Handle<RigidBody> player_body = player_ship->get_body();
  68
  69         Game::TransformValues tv;
  70         tv.position = (player_tf->get_world_matrix()*LinAl::Vector<float, 4>(2.0f, 0.0f, 0.0f, 1.0f)).slice<3>(0);
  71         tv.rotation = player_tf->get_rotation()*Geometry::Quaternion<float>::rotation(Geometry::Angle<float>::from_degrees(10), LinAl::Vector<float, 3>(0.0f, 0.0f, 1.0f));
  72         bullets.emplace_back(stage.get_root(), bullet_setup, tv);
  73         Game::Handle<Bullet> bullet = bullets.back();
  74         Game::Handle<RigidBody> bullet_body = bullet->get_body();
  75         bullet_body->set_velocity(player_body->get_velocity()+(player_tf->get_world_matrix()*LinAl::Vector<float, 4>(20.0f, 0.0f, 0.0f, 0.0f)).slice<2>(0));
  76 }