DayZOfficialSourceCode/Scripts/4_world/entities/itembase/rangefinder.c

class Rangefinder extends PoweredOptic_Base
{
	static const float RANGEFINDER_MAX_DISTANCE = 913.4856; //TODO adjust maximal distance to match real life rangefinder
	
	protected ref Timer 				m_Timer;
	protected TextWidget				m_RangeText;
	
	void Rangefinder()
	{
	}
	
	void ~Rangefinder()
	{
		m_IsActionActive = false;
	}
	
	// How frequently the measurement should be taken
	float GetMeasurementUpdateInterval()
	{
		return 0.5;
	}
	
	override void OnWorkStart()
	{
		if (GetGame().IsServer() && !m_IsActionActive)	// incorrectly synchronized state from EM
			StopWorkServer();
		
		if( !GetGame().IsDedicatedServer())
		{
			PlayerBase player_this = PlayerBase.Cast( GetGame().GetPlayer() );
			PlayerBase player_owner = PlayerBase.Cast( GetHierarchyRootPlayer() );
			
			if ( player_this == player_owner )
			{
				StartPeriodicMeasurement();
			}
		}
	}
	
	override void OnWorkStop()
	{
		if( !GetGame().IsDedicatedServer())
		{
			PlayerBase player_this = PlayerBase.Cast( GetGame().GetPlayer() );
			PlayerBase player_owner = PlayerBase.Cast( GetHierarchyRootPlayer() );
			
			if ( player_this == player_owner )
			{
				StopPeriodicMeasurement();
			}
		}
	}
	
	void StartPeriodicMeasurement()
	{
		if( !m_Timer )
		{
			m_Timer = new Timer( CALL_CATEGORY_GAMEPLAY );
		}
		
		m_RangeText = TextWidget.Cast( GetGame().GetWorkspace().CreateWidgets( "gui/layouts/gameplay/rangefinder_hud.layout" ) );
		
		m_Timer.Run( GetMeasurementUpdateInterval(), this, "DoMeasurement", null, true );
	}
	
	void StopPeriodicMeasurement()
	{
		if( m_Timer )
		{
			m_Timer.Stop();
		}
		
		if (m_RangeText)
		{
			delete m_RangeText;
		}
	}
	
	// Measures the distance and returns result in formated string
	void DoMeasurement()
	{
		PlayerBase player = GetPlayer();
		
		if ( player )
		{
			vector 		from 			= GetGame().GetCurrentCameraPosition();
			vector 		to 				= from + (GetGame().GetCurrentCameraDirection() * RANGEFINDER_MAX_DISTANCE);
			vector 		contact_pos;
			vector 		contact_dir;
			int 		contactComponent;
			
			DayZPhysics.RaycastRV( from, to, contact_pos, contact_dir, contactComponent, NULL , NULL, player, false, false, ObjIntersectIFire);
			
			// Generate result
			float dist = vector.Distance( from, contact_pos );
			dist = Math.Round(dist);
			
			if (dist < RANGEFINDER_MAX_DISTANCE)
			{
				if( dist < 10 )
					m_RangeText.SetText( "00" + dist.ToString() );
				else if( dist < 100 )
					m_RangeText.SetText( "0" + dist.ToString() );
				else
					m_RangeText.SetText( dist.ToString() );
			}
			else
			{
				m_RangeText.SetText( "- - -" );
			}
		}
	}
	
	override void SetActions()
	{
		super.SetActions();
		
		RemoveAction(ActionViewOptics);
		AddAction(ActionViewBinoculars);
	}
	
	override void OnDebugSpawn()
	{
		GetInventory().CreateInInventory( "Battery9V" );
	}
}