Shows the simulation of motion of balls.

Balls attracted to each other with a force F(r) = 1/r + 1/r^2, where r - the distance between the balls.

Balls can be:

• added when hit with left mouse button by the empty place;
• dragged with the mouse when holding left mouse button;
• removed when hit with right mouse button by the ball;

Written on C++11 using Qt5.

Create a scene::Scene object and use next interfaces:

• scene::interfaces::Playable for manipulating with scene playback;
• scene::interface::Controllable for manipulating with selected object;
• scene::interface::Container for adding and removing objects;
• scene::interface::WithGravity for setting the gravity type;
• interchange::Broadcaster for creating a interchange::Subscription for alerting of changes on the scene;

Create QSimulatorWidget for viewing and and interacting with the scene.