BlockTracer.h

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// BlockTracer.h

// Declares the classes common for all blocktracers





#pragma once





#include "Defines.h"





// fwd: World.h
class cWorld;





class cBlockTracer abstract
{
public:
    class cCallbacks abstract
    {
    public:
        // Force a virtual destructor in descendants:
        virtual ~cCallbacks() {}

        virtual bool OnNextBlock(int a_BlockX, int a_BlockY, int a_BlockZ, BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta, eBlockFace a_EntryFace) = 0;

        virtual bool OnNextBlockNoData(int a_BlockX, int a_BlockY, int a_BlockZ, char a_EntryFace)
        {
            UNUSED(a_BlockX);
            UNUSED(a_BlockY);
            UNUSED(a_BlockZ);
            UNUSED(a_EntryFace);
            return false;
        }

        virtual bool OnOutOfWorld(double a_BlockX, double a_BlockY, double a_BlockZ)
        {
            UNUSED(a_BlockX);
            UNUSED(a_BlockY);
            UNUSED(a_BlockZ);
            return false;
        }

        virtual bool OnIntoWorld(double a_BlockX, double a_BlockY, double a_BlockZ)
        {
            UNUSED(a_BlockX);
            UNUSED(a_BlockY);
            UNUSED(a_BlockZ);
            return false;
        }

        virtual void OnNoMoreHits(void) {}

        virtual void OnNoChunk(void) {}
    } ;


    cBlockTracer(cWorld & a_World, cCallbacks & a_Callbacks) :
        m_World(&a_World),
        m_Callbacks(&a_Callbacks)
    {
    }


    cWorld & SetWorld(cWorld & a_World)
    {
        cWorld & Old = *m_World;
        m_World = &a_World;
        return Old;
    }


    cCallbacks & SetCallbacks(cCallbacks & a_NewCallbacks)
    {
        cCallbacks & Old = *m_Callbacks;
        m_Callbacks = &a_NewCallbacks;
        return Old;
    }

protected:
    cWorld * m_World;

    cCallbacks * m_Callbacks;
} ;