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    /*****************************************************************************
    *                                                                             
    *   Bomb.cpp                                                            
    *                                                                             
    *   Electrical Engineering Faculty - Software Lab                             
    *   Spring semester 1998                                                      
    *                                                                             
    *   Tanks game                                                                
    *                                                                             
    *   Module description: Implements the bomb object.
    *                       
    *                                                                             
    *   Authors: Eran Yariv - 28484475                                           
    *            Moshe Zur  - 24070856                                           
    *                                                                            
    *                                                                            
    *   Date: 23/09/98                                                           
    *                                                                            
    ******************************************************************************/
    #include <stdafx.h>
    #include <Bomb.h>
    #include <TankObj.h>
    
    CBomb::CBomb (CPoint& Origin, UINT uDirectionIndex) :
        CMovingGameObject (         Origin.x, Origin.y,
                                    BOMB_WIDTH, BOMB_HEIGHT, 
                                    uDirectionIndex, 
                                    BOMB_SPEED),
    
        CExplodingGameObject (      Origin.x, Origin.y,
                                    BOMB_WIDTH, BOMB_HEIGHT,
                                    BOMB_INTENSITY,
                                    CImageManager::IMG_SHELL_EXPLODE),   // TODO: replace(?)
        m_Origin(Origin)
    {
        m_himgBomb = m_GlobalImageManager.GetImage (CImageManager::IMG_BOMB);
        m_pCurImage = &m_himgBomb; // Override explosion image as current image
    }
    
    StateType 
    CBomb::CalcState (DWORD dwCurTime)
    {
        m_bImageChanged = FALSE;    // Assume no change since last CalcState
        if (m_bIsExploding)
        {
            if (IsExplosionOver()) // Bomb is exploding and after its last frame
            {
                return STATE_DEAD;
            }
            else 
            {
                return STATE_ALIVE;
            }
        }
    
        // We're flying high, we're flying high right to the sky......
    
        // Try to advance...
        int iDistSqr = CalcNewPos (dwCurTime, FALSE);
        if (iDistSqr < 0) 
        {   // Out of map situation
            return STATE_DEAD;
        }
        if (m_GlobalImageManager.ImageEnded (m_himgBomb))
        {
            // Bomb hit's the ground
            Explode ();
        }
        return STATE_ALIVE;
    }
            
    CReaction
    CBomb::React(CGameObject *pTo)
    {
        if (!m_bIsExploding ||          // We don't react until we explode
            pTo->GetType() != TANK)     // We react only to tanks !
        {
            return CReaction(); // No reaction
        }
    
        UINT uTankID = pTo->GetID();
        if (CheckAndSetTankNotification(uTankID))
                // We already exploded on this tank before
            return CReaction(); // No reaction
    
            // OK, this is a tank and it is the first time we explode on it ....
        return CReaction (CalcRelativeExplosionIntensity (pTo, MIN_BOMB_RADIUS, MAX_BOMB_RADIUS));
    }