PoweredRailHandler.h

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#pragma once
 
 
 
 
 
namespace PoweredRailHandler
{
    static Vector3i GetPoweredRailAdjacentXZCoordinateOffset(NIBBLETYPE a_Meta)
    {
        switch (a_Meta & 0x7)
        {
            case E_META_RAIL_ZM_ZP: return { 0, 0, 1 };
            case E_META_RAIL_XM_XP: return { 1, 0, 0 };
            case E_META_RAIL_ASCEND_XP: return { 1, 1, 0 };
            case E_META_RAIL_ASCEND_XM: return { 1, 1, 0 };
            case E_META_RAIL_ASCEND_ZM: return { 0, 1, 1 };
            case E_META_RAIL_ASCEND_ZP: return { 0, 1, 1 };
            default:
            {
                ASSERT(!"Impossible rail meta! wat wat wat");
                return { 0, 0, 0 };
            }
        }
    }
 
    static PowerLevel GetPowerDeliveredToPosition(const cChunk & a_Chunk, Vector3i a_Position, BLOCKTYPE a_BlockType, Vector3i a_QueryPosition, BLOCKTYPE a_QueryBlockType, bool IsLinked)
    {
        UNUSED(a_QueryBlockType);
 
        const auto Meta = a_Chunk.GetMeta(a_Position);
        const auto Offset = GetPoweredRailAdjacentXZCoordinateOffset(Meta);
        if (((Offset + a_Position) == a_QueryPosition) || ((-Offset + a_Position) == a_QueryPosition))
        {
            const auto Power = DataForChunk(a_Chunk).GetCachedPowerData(a_Position);
            return (Power <= 7) ? 0 : (Power - 1);
        }
        return 0;
    }
 
    static void Update(cChunk & a_Chunk, cChunk & CurrentlyTickingChunk, Vector3i a_Position, BLOCKTYPE a_BlockType, NIBBLETYPE a_Meta, const PowerLevel Power)
    {
        // LOGD("Evaluating tracky the rail (%d %d %d)", a_Position.x, a_Position.y, a_Position.z);
 
        switch (a_BlockType)
        {
            case E_BLOCK_DETECTOR_RAIL:
            {
                /*
                if ((m_Chunk->GetMeta(a_RelBlockX, a_RelBlockY, a_RelBlockZ) & 0x08) == 0x08)
                {
                    SetAllDirsAsPowered(a_RelBlockX, a_RelBlockY, a_RelBlockZ, a_MyType);
                }
                */
                return;
            }
            case E_BLOCK_ACTIVATOR_RAIL:
            case E_BLOCK_POWERED_RAIL:
            {
                const auto Offset = GetPoweredRailAdjacentXZCoordinateOffset(a_Meta);
                if (Power != DataForChunk(a_Chunk).ExchangeUpdateOncePowerData(a_Position, Power))
                {
                    a_Chunk.SetMeta(a_Position, (Power == 0) ? (a_Meta & 0x07) : (a_Meta | 0x08));
 
                    UpdateAdjustedRelative(a_Chunk, CurrentlyTickingChunk, a_Position, Offset);
                    UpdateAdjustedRelative(a_Chunk, CurrentlyTickingChunk, a_Position, -Offset);
                }
 
                return;
            }
            default:
            {
                ASSERT(!"Unhandled type of rail in passed to rail handler!");
            }
        }
    }
 
    static void ForValidSourcePositions(const cChunk & a_Chunk, Vector3i a_Position, BLOCKTYPE a_BlockType, NIBBLETYPE a_Meta, ForEachSourceCallback & Callback)
    {
        UNUSED(a_Chunk);
        UNUSED(a_Meta);
 
        if ((a_BlockType == E_BLOCK_POWERED_RAIL) || (a_BlockType == E_BLOCK_ACTIVATOR_RAIL))
        {
            InvokeForAdjustedRelatives(Callback, a_Position, RelativeAdjacents);
        }
    }
};