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{ .physical={ .body={ .mass=1, .moment_of_inertia=0.8f }, .collider={ .type=ColliderType::CIRCLE, .radius=0.8f }},
  12                 .mesh={ .object_name="Bass guitar.object" },
  13                 .speed=12.0f, .turn_rate=4.71f },
  14         bullet_setup{ .physical={ .body={ .mass=0.05f, .moment_of_inertia=0.04f }, .collider={ .type=ColliderType::CIRCLE, .radius=0.2f }},
  15                 .hittable={ .damaging=true, .hits={ .max_hits=1 }, .damage={ .amount=1, .type=0 }},
  16                 .mesh={ .object_name="Quaver.object" }}
  17 { }
  18
  19 void PlayerController::set_controls(Controls *c)
  20 {
  21         controls = c;
  22         if(!player_ship)
  23                 player_ship = Game::Owned<Ship>(stage.get_root(), player_setup);
  24 }
  25
  26 void PlayerController::tick(Time::TimeDelta dt)
  27 {
  28         if(!controls)
  29                 return;
  30
  31         float dt_secs = dt/Time::sec;
  32
  33         const Ship::Setup &setup = player_ship->get_setup();
  34         float thrust = setup.speed*setup.speed;
  35         float torque = setup.turn_rate*setup.turn_rate;
  36
  37         Game::Handle<Game::Transform> transform = player_ship->get_transform();
  38         LinAl::Vector<float, 2> fwd_dir = normalize(transform->get_world_matrix().column(0).slice<2>(0));
  39         Game::Handle<RigidBody> body = player_ship->get_body();
  40
  41         body->add_force(fwd_dir*(controls->forward.get_value()*thrust));
  42         const LinAl::Vector<float, 2> &velocity = body->get_velocity();
  43         float speed = velocity.norm();
  44         if(speed>1e-5)
  45                 body->add_force(velocity*-min(speed+setup.speed/speed, 1.0f/dt_secs));
  46
  47         body->add_torque(controls->turn_left.get_value()*torque);
  48         Geometry::Angle<float> angular_vel = body->get_angular_velocity();
  49         Geometry::Angle<float> angular_speed = abs(angular_vel);
  50         if(abs(angular_speed.radians())>1e-5)
  51                 body->add_torque(angular_vel.radians()*-min(angular_speed.radians()+setup.turn_rate/angular_speed.radians(), 1.0f/dt_secs));
  52
  53         if(controls->fire.was_pressed())
  54                 fire();
  55
  56         controls->reset_edges();
  57 }
  58
  59 void PlayerController::deferred_tick()
  60 {
  61         System::deferred_tick();
  62         erase_if(bullets, [](Game::Handle<Bullet> b){ return !b->get_hitpoints()->is_alive(); });
  63 }
  64
  65 void PlayerController::fire()
  66 {
  67         Game::Handle<Game::Transform> player_tf = player_ship->get_transform();
  68         Game::Handle<RigidBody> player_body = player_ship->get_body();
  69
  70         Game::TransformValues tv;
  71         tv.position = (player_tf->get_world_matrix()*LinAl::Vector<float, 4>(2.0f, 0.0f, 0.0f, 1.0f)).slice<3>(0);
  72         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));
  73         bullets.emplace_back(stage.get_root(), bullet_setup, tv);
  74         Game::Handle<Bullet> bullet = bullets.back();
  75         Game::Handle<RigidBody> bullet_body = bullet->get_body();
  76         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));
  77 }