BlockStairs.h

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#pragma once

#include "BlockHandler.h"
#include "Mixins.h"




class cBlockStairsHandler :
    public cClearMetaOnDrop<cMetaRotator<cBlockHandler, 0x03, 0x03, 0x00, 0x02, 0x01, true>>
{
    using super = cClearMetaOnDrop<cMetaRotator<cBlockHandler, 0x03, 0x03, 0x00, 0x02, 0x01, true>>;

public:

    cBlockStairsHandler(BLOCKTYPE a_BlockType):
        super(a_BlockType)
    {

    }

    virtual bool GetPlacementBlockTypeMeta(
        cChunkInterface & a_ChunkInterface, cPlayer & a_Player,
        int a_BlockX, int a_BlockY, int a_BlockZ, eBlockFace a_BlockFace,
        int a_CursorX, int a_CursorY, int a_CursorZ,
        BLOCKTYPE & a_BlockType, NIBBLETYPE & a_BlockMeta
    ) override
    {
        UNUSED(a_ChunkInterface);
        UNUSED(a_BlockX);
        UNUSED(a_BlockY);
        UNUSED(a_BlockZ);
        UNUSED(a_CursorX);
        UNUSED(a_CursorZ);
        a_BlockType = m_BlockType;
        a_BlockMeta = RotationToMetaData(a_Player.GetYaw());
        switch (a_BlockFace)
        {
            case BLOCK_FACE_TOP:    break;
            case BLOCK_FACE_BOTTOM: a_BlockMeta = a_BlockMeta | 0x4; break;  // When placing onto a bottom face, always place an upside-down stairs block
            case BLOCK_FACE_EAST:
            case BLOCK_FACE_NORTH:
            case BLOCK_FACE_SOUTH:
            case BLOCK_FACE_WEST:
            {
                // When placing onto a sideways face, check cursor, if in top half, make it an upside-down stairs block
                if (a_CursorY > 8)
                {
                    a_BlockMeta |= 0x4;
                }
                break;
            }
            case BLOCK_FACE_NONE: return false;
        }
        return true;
    }

    static NIBBLETYPE RotationToMetaData(double a_Rotation)
    {
        a_Rotation += 90 + 45;  // So its not aligned with axis
        if (a_Rotation > 360)
        {
            a_Rotation -= 360;
        }
        if ((a_Rotation >= 0) && (a_Rotation < 90))
        {
            return 0x0;
        }
        else if ((a_Rotation >= 180) && (a_Rotation < 270))
        {
            return 0x1;
        }
        else if ((a_Rotation >= 90) && (a_Rotation < 180))
        {
            return 0x2;
        }
        else
        {
            return 0x3;
        }
    }

    virtual NIBBLETYPE MetaMirrorXZ(NIBBLETYPE a_Meta) override
    {
        // Toggle bit 3:
        return (a_Meta & 0x0b) | ((~a_Meta) & 0x04);
    }

    virtual ColourID GetMapBaseColourID(NIBBLETYPE a_Meta) override
    {
        UNUSED(a_Meta);
        switch (m_BlockType)
        {
            case E_BLOCK_SANDSTONE_STAIRS:
            case E_BLOCK_BIRCH_WOOD_STAIRS: return 2;
            case E_BLOCK_QUARTZ_STAIRS: return 8;
            case E_BLOCK_JUNGLE_WOOD_STAIRS:
            case E_BLOCK_RED_SANDSTONE_STAIRS: return 10;
            case E_BLOCK_COBBLESTONE_STAIRS:
            case E_BLOCK_STONE_BRICK_STAIRS: return 11;
            case E_BLOCK_OAK_WOOD_STAIRS: return 13;
            case E_BLOCK_ACACIA_WOOD_STAIRS: return 15;
            case E_BLOCK_PURPUR_STAIRS: return 16;
            case E_BLOCK_DARK_OAK_WOOD_STAIRS: return 26;
            case E_BLOCK_BRICK_STAIRS: return 28;
            case E_BLOCK_NETHER_BRICK_STAIRS: return 35;
            case E_BLOCK_SPRUCE_WOOD_STAIRS: return 34;
            default:
            {
                ASSERT(!"Unhandled blocktype in stairs handler!");
                return 0;
            }
        }
    }

    #if 0
    bool IsInsideBlock(const Vector3d & a_Position, const BLOCKTYPE a_BlockType, const NIBBLETYPE a_BlockMeta)
    {
        if (a_BlockMeta & 0x4)  // upside down
        {
            return true;
        }
        else if ((a_BlockMeta & 0x3) == 0)  // tall side is east (+X)
        {
            return a_Position.y < ((a_Position.x > 0.5) ? 1.0 : 0.5);
        }
        else if ((a_BlockMeta & 0x3) == 1)  // tall side is west (-X)
        {
            return a_Position.y < ((a_Position.x < 0.5) ? 1.0 : 0.5);
        }
        else if ((a_BlockMeta & 0x3) == 2)  // tall side is south (+Z)
        {
            return a_Position.y < ((a_Position.z > 0.5) ? 1.0 : 0.5);
        }
        else if ((a_BlockMeta & 0x3) == 3)  // tall side is north (-Z)
        {
            return a_Position.y < ((a_Position.z < 0.5) ? 1.0 : 0.5);
        }
        return false;
    }
    #endif

} ;