rangefinder.c

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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()
    {
    }
    
    // How frequently the measurement should be taken
    float GetMeasurementUpdateInterval()
    {
        return 0.5;
    }
    
    override void OnWorkStart()
    {
        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" );
    }
}