Processing the Input (keyboard, mouse). Intersections

private void Update()
{
	// if the right mouse button is pressed
	if(Input.IsMouseButtonDown(Input.MOUSE_BUTTON.RIGHT))
	{
		ivec2 mouse = Input.MousePosition;
		// write the current cursor coordinates to the Console
		Log.Message("Right mouse button was clicked at {0}\n", mouse);
	}

	// close the application when the 'q' key is pressed on the keyboard, or ignore it if the Console is open
	if (Input.IsKeyDown(Input.KEY.Q) && !Unigine.Console.Active)
	{
		Engine.Quit();
	}
}

void listNodes(List<Node> nodes, string intersection_with)
{
	Log.Message("total number of nodes intersecting a {0} is: {1} \n", intersection_with, nodes.Count);
	foreach (Node node in nodes)
	{
		Log.Message("Intersected node: {0} \n", node.Name);
	}

	// clearing the list of nodes
	nodes.Clear();
}

private void Update()
{

	// take a reference to the current camera (Player)
	Player player = Game.Player;

	// create a list for storing detected nodes
	List<Node> nodes = new <Node>();

	//-------------------------- FINDING INTERSECTIONS WITH BOUNDING BOX -------------------------

	// initializing a bounding box with a size of 3 units located at the World origin
	WorldBoundBox boundBox = new WorldBoundBox(new Vec3(0.0f), new Vec3(3.0f));

	// searching for nodes intersected the bound and, if found, adding them into the list
	if (World.GetIntersection(boundBox, nodes))
		listNodes(nodes, "bounding box");

	//------------------------- FINDING INTERSECTIONS WITH BOUNDING SPHERE ------------------------

	// initializing a bounding sphere with a radius of 3 units at the coordinate origin
	WorldBoundSphere boundSphere = new WorldBoundSphere(new Vec3(0.0f), 3.0f);

	// searching for nodes intersected the bound and, if found, adding them into the list
	if (World.GetIntersection(boundSphere, nodes))
		listNodes(nodes, "bounding sphere");

	//-------------------------FINDING INTERSECTIONS WITH BOUNDING FRUSTUM -----------------------

	// initializing a bounding frustum with a frustum of the player's camera
	WorldBoundFrustum boundFrustum = new WorldBoundFrustum(player.Camera.Projection, player.Camera.Modelview);

	// finding ObjectMeshStaticNodes intersecting a bounding frustum and listing them if any
	if (World.GetIntersection(boundFrustum, Node.TYPE.OBJECT_MESH_STATIC, nodes))
		listNodes(nodes, "bounding frustum");

	//---------------- FINDING THE FIRST OBJECT INTERSECTED BY A RAY CAST FROM P0 to P1 --------------

	// initializing points of the ray from player's position (p0) in the direction pointed by the mouse cursor (p1)
	ivec2 mouse = Input.MousePosition;
	Vec3 p0 = player.WorldPosition;
	Vec3 p1 = p0 + new Vec3(player.GetDirectionFromMainWindow(mouse.x, mouse.y)) * 100;

	// creating a WorldIntersection object to store the information about the intersection
	WorldIntersection intersection = new WorldIntersection();

	// casting a ray from p0 to p1 to find the first intersected object
	Unigine.Object obj = World.GetIntersection(p0, p1, 1, intersection);

	// print the name of the first intersected object and coordinates of intersection point, if any, to the Console
	if (obj)
	{
		Vec3 p = intersection.Point;
		Log.Message("The first object intersected by the ray at point ({0}) is: {1} \n ", p, obj.Name);
	}
}