BlockObserver.h

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#pragma once
 
#include "BlockHandler.h"
#include "Mixins.h"
 
 
class cBlockObserverHandler final :
    public cClearMetaOnDrop<cDisplacementYawRotator<cBlockHandler>>
{
    using Super = cClearMetaOnDrop<cDisplacementYawRotator<cBlockHandler>>;
 
public:
 
    using Super::Super;
 
    inline static Vector3i GetObservingFaceOffset(NIBBLETYPE a_Meta)
    {
        return -GetSignalOutputOffset(a_Meta);
    }
 
    inline static Vector3i GetSignalOutputOffset(NIBBLETYPE a_Meta)
    {
        switch (a_Meta & 0x7)
        {
            case 0x00: return { 0, 1, 0 };
            case 0x01: return { 0, -1, 0 };
            case 0x02: return { 0, 0, 1 };
            case 0x03: return { 0, 0, -1 };
            case 0x04: return { 1, 0, 0 };
            case 0x05: return { -1, 0, 0 };
            default:
            {
                LOGWARNING("%s: Unknown metadata: %d", __FUNCTION__, a_Meta);
                ASSERT(!"Unknown metadata while determining orientation of observer!");
                return { 0, 0, 0 };
            }
        }
    }
};