SCR_AIDecoBallisticPath.c

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class SCR_AIDecoBallisticPath : DecoratorScripted
{
    // Inputs
    protected static const string PORT_DISTANCE_COMPENSATION = "DistanceCompensation";
    protected static const string PORT_TARGET_POSITION = "TargetPos";
    
    protected ref TraceParam m_TraceParam;
    
#ifdef WORKBENCH
    protected ref array<ref Shape> m_aDebugShapes = {};
#endif
    
    //--------------------------------------------------------------------------------
    //override void OnInit(AIAgent owner) { }
    
    //--------------------------------------------------------------------------------
    override bool TestFunction(AIAgent owner)
    {
        SCR_ChimeraCharacter myCharacter = SCR_ChimeraCharacter.Cast(owner.GetControlledEntity());
        if (!myCharacter)
            return false;
        
        vector targetPos;
        GetVariableIn(PORT_TARGET_POSITION, targetPos);
        
        vector distanceCompensation;
        GetVariableIn(PORT_DISTANCE_COMPENSATION, distanceCompensation);
        
        vector traceFrom = myCharacter.EyePosition(); // todo For now it only works for character, and not for turrets!
        vector targetPosCompensated = targetPos + distanceCompensation;
        vector traceTo = 0.5*(traceFrom + targetPosCompensated);
        
        
        if (!m_TraceParam)
            m_TraceParam = new TraceParam();
        
        m_TraceParam.Start = traceFrom;
        m_TraceParam.End = traceTo;
        m_TraceParam.Exclude = myCharacter;
        m_TraceParam.LayerMask = EPhysicsLayerDefs.Projectile;
        m_TraceParam.Flags = TraceFlags.ENTS | TraceFlags.OCEAN | TraceFlags.WORLD | TraceFlags.ANY_CONTACT;
        
        float traceResult = GetGame().GetWorld().TraceMove(m_TraceParam, null);
        bool traceHit = traceResult != 1.0;
        
#ifdef WORKBENCH
        if (DiagMenu.GetBool(SCR_DebugMenuID.DEBUGUI_AI_SHOW_DEBUG_SHAPES))
        {
            m_aDebugShapes.Clear();
            
            int lineColor;
            if (!traceHit)
                lineColor = Color.GREEN;
            else
                lineColor = Color.RED;
            
            vector lineVerts[2];
            lineVerts[0] = m_TraceParam.Start;
            lineVerts[1] = m_TraceParam.End;
            Shape lineShape = Shape.CreateLines(lineColor, ShapeFlags.DEFAULT, lineVerts, 2);
            m_aDebugShapes.Insert(lineShape);
            
            if (traceHit)
            {
                vector hitPos = m_TraceParam.Start + traceResult * (m_TraceParam.End - m_TraceParam.Start);
                Shape sphereShape = Shape.CreateSphere(Color.RED, ShapeFlags.DEFAULT, hitPos, 0.2);
                m_aDebugShapes.Insert(sphereShape);
            }
        }
#endif
        
        return !traceHit;
    }
    
    //--------------------------------------------------------------------------------
    static override string GetOnHoverDescription() { return "Estimates if projectile ballistic path can reach destination. It is performance heavy, use with some timer."; }
    static override bool VisibleInPalette() { return true; }
    
    protected static ref TStringArray s_aVarsIn = { PORT_DISTANCE_COMPENSATION, PORT_TARGET_POSITION };
    override TStringArray GetVariablesIn() { return s_aVarsIn; }
}