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);
	}
}

using System;
using System.Collections;
using System.Collections.Generic;
using Unigine;
#if UNIGINE_DOUBLE
using Vec3 = Unigine.dvec3;
#else
	using Vec3 = Unigine.vec3;
#endif 
[Component(PropertyGuid = "AUTOGENERATED_GUID")] // <-- this line is generated automatically for a new component
public class InputProcessor : Component
{
	private Player player = Game.Player;
	private Unigine.Object SelectedObject = null;	// last selected object

	public WorldIntersection intersection = null;	// intersection point with the last object under the mouse cursor
	
	private void Init()
	{
		// create an instance of the WorldIntersection class to store information about intersection
		intersection = new WorldIntersection();
	}

	private void Update()
	{
		// if the console is open, do nothing
		if(Unigine.Console.Active)
		return;

		// set the beginning of the segment (p0) at the camera position and the end (p1) at the point the mouse cursor is pointing to
		ivec2 mouse = Input.MousePosition;
		Vec3 p0 = player.WorldPosition;
		Vec3 p1 = p0 + new Vec3(player.GetDirectionFromMainWindow(mouse.x, mouse.y)) * 100;

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

		// if the object is interactable (has the Interactable component assigned), display information about it on the screen
		Interactable interactable = obj.GetComponent<Interactable>();
		if (interactable)
			interactable.DisplayInfo();
		
		// check the state of the right mouse button
		if(Input.IsMouseButtonDown(Input.MOUSE_BUTTON.RIGHT))
		{
			// if the object is interactable (has the Interactable component assigned)
			if (obj && interactable)
			{
				// send the 'Perform action 0' signal to the object
				interactable.Action(0);
				// register it as the list selected
				SelectedObject = obj;
			}
		}

		// check if any object is selected and the 'TAB' key is pressed 
		if(SelectedObject && Input.IsKeyDown(Input.KEY.TAB))
		{
			// send 'Perform action 1' signal to the object
			SelectedObject.GetComponent<Interactable>().Action(1);
		}

		// check if the 'Q' key is pressed and the Console is not open, then close the application
		if(Input.IsKeyDown(Input.KEY.Q) && !Unigine.Console.Active)
		{
			Engine.Quit();
		}
	}
}