trigger.c

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class TriggerInsider
{
    ref OLinkT insider; // DEPRECATED
    
    protected Object m_Object;
    
    int timeStamp;
    
    float timeEntered;
    
    float lastUpdated;
    
    void TriggerInsider(Object obj)
    {
        insider = new OLinkT(obj);
        m_Object = obj;
    }
    
    void ~TriggerInsider()
    {
    }
 
    Object GetObject()
    {
        return m_Object;
    }
};
 
#ifdef DIAG_DEVELOPER
typedef Param7<vector, vector, vector, vector, float, string, array<ref TriggerInsider>> DebugTriggerInfo;
#endif

class Trigger : TriggerEvents
{
    const int TIMEOUT = 1000;
    ref array<ref TriggerInsider> m_insiders;
    
    #ifdef DIAG_DEVELOPER
    bool m_Local;//is this trigger spawning on client only ?
    string                      m_DebugAreaType;
    ref array<ref TriggerInsider> m_dbgInsiders;
    #endif
    
    private void Trigger()
    {
        SetEventMask(EntityEvent.INIT /*| EntityEvent.TOUCH*/ | EntityEvent.FRAME | EntityEvent.ENTER | EntityEvent.LEAVE );
        SetFlags(EntityFlags.TRIGGER, false);
        
        m_insiders = new array<ref TriggerInsider>;     
    }
    
    private void ~Trigger()
    {
        #ifdef DIAG_DEVELOPER
        CleanupDebugShapes(dbgTargets);
        #endif
    }


    override void EOnInit(IEntity other, int extra)
    {
        SetExtents("-2 -4 -2", "2 4 2");
    }
    
    /*override void EOnTouch(IEntity other, int extra)
    {
        Object obj;
        if (Class.CastTo(obj, other) && CanAddObjectAsInsider(obj))
            AddInsider(obj);
    }*/
    
    override void EOnFrame(IEntity other, float timeSlice)
    {
        UpdateInsiders(TIMEOUT);
    }
    
    override void EOnEnter(IEntity other, int extra)
    {
        Object obj;
        if (Class.CastTo(obj, other) && CanAddObjectAsInsider(obj))
            AddInsider(obj);
    }
    
    override void EOnLeave(IEntity other, int extra)
    {
        Object obj;
        if (Class.CastTo(obj, other))
            RemoveInsiderByObject(obj);
    }
    
    

    void SetExtents(vector mins, vector maxs)
    {
        SetCollisionBox(mins, maxs);
    }
    
    float GetRadius(vector min, vector max)
    {
        return GetCollisionRadius();            
    }
    
    array<ref TriggerInsider> GetInsiders()
    {
        return m_insiders;
    }
    
    TriggerInsider GetInsiderForObject(Object object)
    {
        TriggerInsider ins;
        
        for ( int n = 0; n < m_insiders.Count(); ++n )
        {
            ins = m_insiders[n];
            if (ins.GetObject() == object)
                return ins;
        }
        
        return null;
    }
    
    int GetInsiderIndexForObject(Object object)
    {
        TriggerInsider ins;
        
        for ( int n = 0; n < m_insiders.Count(); ++n )
        {
            ins = m_insiders[n];
            if (ins.GetObject() == object)
                return n;
        }
        
        return -1;
    }
    
    
    override protected void OnEnterBeginEvent(TriggerInsider insider)
    {
        // Call the old event for backwards compatibility
        OnEnter(insider.GetObject());
    }
    
    override protected void OnLeaveBeginEvent(TriggerInsider insider)
    {
        // Call the old event for backwards compatibility
        OnLeave(insider.GetObject());
    }   

 
    
    void OnEnter(Object obj) {}
    
    void OnLeave(Object obj) {}
    
    

    protected bool CanAddObjectAsInsider(Object object)
    {
        return true;
    }
    
    protected bool ShouldRemoveInsider(TriggerInsider insider)
    {
        return false;
    }
    
    protected bool ShouldRemoveInsiderNoLeave(TriggerInsider insider)
    {
        return false;
    }

    
    

    protected TriggerInsider CreateInsider(Object obj)
    {
        return new TriggerInsider(obj);
    }
    
    protected void AddInsider(Object obj)
    {
        if ( !obj )
            return; 
 
        // Already in?
        if ( GetInsiderForObject( obj ) )
        {
            Error(string.Format("[WARNING] :: [Trigger] :: [%1] :: Insider (%2) is already inside.", GetDebugName(this), GetDebugName(obj)));
            return;
        }
            
        // New Object entered! Fill the data.
        TriggerInsider insider = CreateInsider(obj);
        insider.timeStamp = g_Game.GetTime();
        insider.timeEntered = g_Game.GetTickTime();
        insider.lastUpdated = insider.timeEntered;
        
        // Don't add if it is going to be removed anyways..
        if ( ShouldRemoveInsider(insider) || ShouldRemoveInsiderNoLeave(insider) )
            return;
        
        // Keep track of the Object as long as it is inside the Trigger
        int index = m_insiders.Insert(insider);
        
        // Call the enter event to signal this Object entered
        Enter(insider);
        obj.OnEnterTrigger(this);
        
        #ifdef TRIGGER_DEBUG_NORMAL
        Debug.TriggerLog(string.Format("%1: inserted at index %2", GetDebugName(obj), index), "Trigger", "", "AddInsider", GetDebugName(this));
        #endif
    }
    
    protected void RemoveInsider(TriggerInsider insider, int index = -1)
    {
        Leave(insider);
        insider.GetObject().OnLeaveTrigger(this);
        
        #ifdef TRIGGER_DEBUG_NORMAL
        Debug.TriggerLog(string.Format("%1: removing at index %2", GetDebugName(insider.GetObject()), index), "Trigger", "", "RemoveInsider", GetDebugName(this));
        #endif  
        
        if (index >= 0)
            m_insiders.Remove(index);
        else
            m_insiders.RemoveItemUnOrdered(insider);
    }
    
    protected void RemoveInsiderByObject(Object object)
    {
        TriggerInsider ins;
        for ( int n = 0; n < m_insiders.Count(); ++n )
        {
            ins = m_insiders[n];
            if (ins.GetObject() == object)
            {
                RemoveInsider(ins, n);
                return;
            }
        }
        
        // As EOnLeave can call this, it is perfectly valid that this Object is not found on Script side
        // because of "ShouldRemoveInsider" and "ShouldRemoveInsiderNoLeave"
    }
    
    protected void UpdateInsiders(int timeout)
    {
        #ifdef DIAG_DEVELOPER
        DebugSendDmgTrigger();
        #endif
 
        // Don't do anything if there aren't any insiders
        if ( m_insiders.Count() == 0 )
            return;
        
        // Mark the beginning of the update loop
        StayStart(m_insiders.Count());
        
        // Iterate over the current insiders, backwards because we are deleting
        for ( int n = m_insiders.Count() - 1; n >= 0 ; --n)
        {
            TriggerInsider insider = m_insiders.Get(n);
            Object obj = insider.GetObject();
            
            // Check if the Object still exists or should be removed without calling OnLeaveEvent
            if ( !obj || ShouldRemoveInsiderNoLeave(insider) )
            {
                #ifdef TRIGGER_DEBUG_BASIC
                Debug.TriggerLog(string.Format("%1: removed with no Leave.", GetDebugName(obj)), "Trigger", "", "UpdateInsiders", GetDebugName(this));
                #endif
                
                m_insiders.Remove(n);
                continue;
            }
            
            // Check if Object left the Trigger or should be removed regardless
            if ( ShouldRemoveInsider(insider) )
            {
                RemoveInsider(insider, n);
                continue;
            }
            
            // Call the OnStayEvent, Object is still inside the Trigger and can be updated
            // Pass in the time since the Object was last updated (or entered)
            float currentTime = g_Game.GetTickTime();
            Stay(insider, currentTime - insider.lastUpdated);
            insider.lastUpdated = currentTime;
        }
        
        // Mark the end of the update loop
        StayFinish();
    }

    
    override void OnRPC(PlayerIdentity sender, int rpc_type, ParamsReadContext ctx)
    {   
        super.OnRPC(sender, rpc_type, ctx);
 
        #ifdef DIAG_DEVELOPER
        switch (rpc_type)
        {
            case ERPCs.DIAG_TRIGGER_DEBUG:
                DebugTriggerInfo data = new DebugTriggerInfo(vector.Zero, vector.Zero, vector.Zero, vector.Zero, 0, "", null);
            
                if (ctx.Read(data))
                    DebugDmgTrigger(data.param1, data.param2, data.param3, data.param4, data.param5, data.param6, data.param7);
            break;
        }
        #endif
    }
    
#ifdef DIAG_DEVELOPER
    void DebugSendDmgTrigger()
    {       
        vector minmax[2];
        GetCollisionBox(minmax);
        
        DebugTriggerInfo data = new DebugTriggerInfo(vector.Zero, vector.Zero, vector.Zero, vector.Zero, 0, "", null);
        data.param1 = GetWorldPosition();
        data.param2 = GetOrientation();     
        data.param3 = minmax[0];
        data.param4 = minmax[1];
        data.param5 = GetCollisionRadius();     
        data.param6 = m_DebugAreaType;
        data.param7 = m_insiders;
        
        if (g_Game.IsMultiplayer() && g_Game.IsServer())
            PluginDiagMenuServer.SendDataToSubscribersServer(this, ESubscriberSystems.TRIGGERS, ERPCs.DIAG_TRIGGER_DEBUG, data, false);
        else if (!g_Game.IsMultiplayer() || m_Local)
            DebugDmgTrigger(data.param1, data.param2, data.param3, data.param4, data.param5, data.param6, data.param7);
    }
    
    protected ref array<Shape> dbgTargets = new array<Shape>();
    
    void DebugDmgTrigger( vector pos, vector orientation, vector min, vector max, float radius, string dmgType, array<ref TriggerInsider> insiders)
    {
        CleanupDebugShapes(dbgTargets);
 
        bool enableDebug = DiagMenu.GetBool(DiagMenuIDs.TRIGGER_DEBUG);
        if (enableDebug)
        {
            if (g_Game.IsMultiplayer() && g_Game.IsServer())
            {
                return;
            }
            
            vector w_pos, w_pos_sphr, w_pos_lend;
            
            w_pos = pos;
            // sphere pos tweaks
            w_pos_sphr = w_pos;
            // line pos tweaks
            w_pos_lend = w_pos;
            
            //Find way to change colour of box depending on ammoType in a more elegant fashion
            m_DebugAreaType = dmgType;
            Shape dbgShape;         
            
            switch ( m_DebugAreaType )
            {
                case "FireDamage":
                    dbgShape = DrawDebugShape(pos, min, max, radius, COLOR_RED_A);
                break;
                
                case "BarbedWireHit":
                    dbgShape = DrawDebugShape(pos, min, max, radius, COLOR_BLUE_A);
                break;
                
                default:
                    dbgShape = DrawDebugShape(pos, min, max, radius, COLOR_GREEN_A);
                break;
            }
            
            if (g_Game.IsMultiplayer() || g_Game.IsServer())
                m_dbgInsiders = insiders;
        
            if (m_dbgInsiders.Count() > 0)
            {
                //Change colour to make state clearer
                dbgShape.SetColor(COLOR_YELLOW_A);
                
                for (int i = 0; i < m_dbgInsiders.Count(); i++)
                {
                    EntityAI insider_EAI = EntityAI.Cast(m_dbgInsiders[i].GetObject());
                    if (insider_EAI)
                    {
                        vector insiderPos = insider_EAI.GetWorldPosition() + "0 0.1 0";                     
                        dbgTargets.Insert(Debug.DrawArrow(w_pos, insiderPos));
                    }
                }
            }
        }
    }
    
    protected Shape DrawDebugShape(vector pos, vector min, vector max, float radius, int color)
    {
        Shape dbgShape;
 
        switch (GetTriggerShape())
        {
            case TriggerShape.BOX:
                dbgShape = Debug.DrawBoxEx(min, max, color, ShapeFlags.TRANSP|ShapeFlags.NOZWRITE);
    
                vector mat[4];
                GetTransform(mat);
                dbgShape.CreateMatrix(mat);
                dbgShape.SetMatrix(mat);
                break;
            case TriggerShape.CYLINDER:
                dbgShape = Debug.DrawCylinder(pos, radius, max[1], color, ShapeFlags.TRANSP|ShapeFlags.NOZWRITE);
                break;
            case TriggerShape.SPHERE:
                dbgShape = Debug.DrawSphere(pos, radius, color, ShapeFlags.TRANSP|ShapeFlags.NOZWRITE);
                break;
            default:
                ErrorEx("TriggerShape not found", ErrorExSeverity.WARNING);
                break;
        }
 
        dbgTargets.Insert(dbgShape);
    
        return dbgShape;
    }
    
    protected void CleanupDebugShapes(array<Shape> shapes)
    {
        foreach (Shape shape : shapes)
        {
            Debug.RemoveShape(shape);
        }
 
        shapes.Clear();
    }
    
#endif
};