Fix various cases of bad math

[libs/game.git] / examples / bassteroids / source / playercontroller.cpp

diff --git a/examples/bassteroids/source/playercontroller.cpp b/examples/bassteroids/source/playercontroller.cpp
index 939d8384c200fb3dd0c7f4077e1b0b6b8b775b0a..cd7e72ad3a53f191a36b23921466d1834dbd985f 100644 (file)
--- a/examples/bassteroids/source/playercontroller.cpp
+++ b/examples/bassteroids/source/playercontroller.cpp
@@ -8,7 +8,7 @@ using namespace Msp;
 
 PlayerController::PlayerController(Game::Stage &s):
        System(s),
-       player_setup{ .physical={ .body={ .mass=1 }, .collider={ .type=ColliderType::CIRCLE, .radius=0.8f }},
+       player_setup{ .physical={ .body={ .mass=1, .moment_of_inertia=0.8f }, .collider={ .type=ColliderType::CIRCLE, .radius=0.8f }},
                .mesh={ .object_name="Bass guitar.object" },
                .speed=12.0f, .turn_rate=4.71f }
 { }
@@ -38,10 +38,12 @@ void PlayerController::tick(Time::TimeDelta dt)
        body->add_force(fwd_dir*(controls->forward.get_value()*thrust));
        const LinAl::Vector<float, 2> &velocity = body->get_velocity();
        float speed = velocity.norm();
-       body->add_force(velocity*-min(speed+setup.speed/speed, 1.0f/dt_secs));
+       if(speed>1e-5)
+               body->add_force(velocity*-min(speed+setup.speed/speed, 1.0f/dt_secs));
 
        body->add_torque(controls->turn_left.get_value()*torque);
        Geometry::Angle<float> angular_vel = body->get_angular_velocity();
        Geometry::Angle<float> angular_speed = abs(angular_vel);
-       body->add_torque(angular_vel.radians()*-min(angular_speed.radians()+setup.turn_rate/angular_speed.radians(), 1.0f/dt_secs));
+       if(abs(angular_speed.radians())>1e-5)
+               body->add_torque(angular_vel.radians()*-min(angular_speed.radians()+setup.turn_rate/angular_speed.radians(), 1.0f/dt_secs));
 }