275 lines
7.2 KiB
C++
275 lines
7.2 KiB
C++
#pragma once
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#include "BlockHandler.h"
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#include "../BlockInfo.h"
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#include "../Chunk.h"
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#include "Mixins.h"
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#include "ChunkInterface.h"
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class cBlockButtonHandler :
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public cClearMetaOnDrop<cMetaRotator<cBlockHandler, 0x07, 0x04, 0x01, 0x03, 0x02, true>>
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{
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using Super = cClearMetaOnDrop<cMetaRotator<cBlockHandler, 0x07, 0x04, 0x01, 0x03, 0x02, true>>;
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public:
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using Super::Super;
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/** Extracts the ON bit from metadata and returns if true if it is set */
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static bool IsButtonOn(NIBBLETYPE a_Meta)
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{
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return (a_Meta & 0x08) == 0x08;
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}
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/** Event handler for an arrow striking a block.
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Performs appropriate handling if the arrow intersected a wooden button. */
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static void OnArrowHit(cWorld & a_World, const Vector3i a_Position, const eBlockFace a_HitFace)
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{
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BLOCKTYPE Type;
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NIBBLETYPE Meta;
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const auto Pos = AddFaceDirection(a_Position, a_HitFace);
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if (
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!a_World.GetBlockTypeMeta(Pos, Type, Meta) ||
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IsButtonOn(Meta) ||
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!IsButtonPressedByArrow(a_World, Pos, Type, Meta)
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)
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{
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// Bail if we're not specifically a wooden button, or it's already on
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// or if the arrow didn't intersect. It is very important that nothing is
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// done if the button is depressed, since the release task will already be queued
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return;
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}
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a_World.SetBlockMeta(Pos, Meta | 0x08);
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a_World.WakeUpSimulators(Pos);
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// sound name is ok to be wood, because only wood gets triggered by arrow
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a_World.GetBroadcastManager().BroadcastSoundEffect("block.wood_button.click_on", Pos, 0.5f, 0.6f);
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// Queue a button reset
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QueueButtonRelease(a_World, Pos, Type);
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}
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private:
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virtual bool OnUse(
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cChunkInterface & a_ChunkInterface,
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cWorldInterface & a_WorldInterface,
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cPlayer & a_Player,
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const Vector3i a_BlockPos,
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eBlockFace a_BlockFace,
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const Vector3i a_CursorPos
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) const override
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{
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NIBBLETYPE Meta = a_ChunkInterface.GetBlockMeta(a_BlockPos);
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// If button is already on, do nothing:
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if (IsButtonOn(Meta))
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{
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return false;
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}
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// Set the ON bit to on
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Meta |= 0x08;
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const auto SoundToPlay = (m_BlockType == E_BLOCK_STONE_BUTTON) ? "block.stone_button.click_on" : "block.wood_button.click_on";
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a_ChunkInterface.SetBlockMeta(a_BlockPos, Meta);
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a_WorldInterface.WakeUpSimulators(a_BlockPos);
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a_WorldInterface.GetBroadcastManager().BroadcastSoundEffect(SoundToPlay, a_BlockPos, 0.5f, 0.6f, a_Player.GetClientHandle());
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// Queue a button reset (unpress)
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QueueButtonRelease(*a_Player.GetWorld(), a_BlockPos, m_BlockType);
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return true;
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}
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virtual bool IsUseable(void) const override
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{
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return true;
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}
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virtual bool GetPlacementBlockTypeMeta(
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cChunkInterface & a_ChunkInterface,
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cPlayer & a_Player,
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const Vector3i a_PlacedBlockPos,
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eBlockFace a_ClickedBlockFace,
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const Vector3i a_CursorPos,
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BLOCKTYPE & a_BlockType, NIBBLETYPE & a_BlockMeta
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) const override
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{
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a_BlockType = m_BlockType;
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a_BlockMeta = BlockFaceToMetaData(a_ClickedBlockFace);
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return true;
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}
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/** Converts the block face of the neighbor to which the button is attached, to the block meta for this button. */
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inline static NIBBLETYPE BlockFaceToMetaData(eBlockFace a_BlockFace)
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{
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switch (a_BlockFace)
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{
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case BLOCK_FACE_YP: return 0x5;
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case BLOCK_FACE_ZM: return 0x4;
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case BLOCK_FACE_ZP: return 0x3;
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case BLOCK_FACE_XM: return 0x2;
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case BLOCK_FACE_XP: return 0x1;
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case BLOCK_FACE_YM: return 0x0;
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case BLOCK_FACE_NONE:
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{
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ASSERT(!"Unhandled block face!");
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return 0x0;
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}
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}
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UNREACHABLE("Unsupported block face");
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}
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/** Converts the block meta of this button into a block face of the neighbor to which the button is attached. */
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inline static eBlockFace BlockMetaDataToBlockFace(NIBBLETYPE a_Meta)
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{
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switch (a_Meta & 0x7)
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{
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case 0x0: return BLOCK_FACE_YM;
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case 0x1: return BLOCK_FACE_XP;
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case 0x2: return BLOCK_FACE_XM;
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case 0x3: return BLOCK_FACE_ZP;
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case 0x4: return BLOCK_FACE_ZM;
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case 0x5: return BLOCK_FACE_YP;
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default:
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{
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ASSERT(!"Unhandled block meta!");
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return BLOCK_FACE_NONE;
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}
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}
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}
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virtual bool CanBeAt(cChunkInterface & a_ChunkInterface, const Vector3i a_RelPos, const cChunk & a_Chunk) const override
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{
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auto Meta = a_Chunk.GetMeta(a_RelPos);
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auto SupportRelPos = AddFaceDirection(a_RelPos, BlockMetaDataToBlockFace(Meta), true);
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if (!cChunkDef::IsValidHeight(SupportRelPos.y))
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{
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return false;
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}
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BLOCKTYPE SupportBlockType;
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a_Chunk.UnboundedRelGetBlockType(SupportRelPos, SupportBlockType);
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return cBlockInfo::FullyOccupiesVoxel(SupportBlockType);
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}
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virtual ColourID GetMapBaseColourID(NIBBLETYPE a_Meta) const override
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{
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UNUSED(a_Meta);
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return 0;
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}
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/** Schedules a recurring event at appropriate intervals to release a button at a given position.
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The given block type is checked when the task is executed to ensure the position still contains a button. */
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static void QueueButtonRelease(cWorld & a_ButtonWorld, const Vector3i a_Position, const BLOCKTYPE a_BlockType)
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{
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const auto TickDelay = (a_BlockType == E_BLOCK_STONE_BUTTON) ? 20 : 30;
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a_ButtonWorld.ScheduleTask(
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TickDelay,
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[a_Position, a_BlockType](cWorld & a_World)
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{
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BLOCKTYPE Type;
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NIBBLETYPE Meta;
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if (
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!a_World.GetBlockTypeMeta(a_Position, Type, Meta) ||
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(Type != a_BlockType) || !IsButtonOn(Meta)
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)
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{
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// Total failure or block changed, bail
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return;
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}
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if (IsButtonPressedByArrow(a_World, a_Position, Type, Meta))
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{
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// Try again in a little while
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QueueButtonRelease(a_World, a_Position, a_BlockType);
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return;
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}
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// Block hasn't change in the meantime; release it
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const auto SoundToPlayOnRelease = (Type == E_BLOCK_STONE_BUTTON) ? "block.stone_button.click_off" : "block.wood_button.click_off";
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a_World.SetBlockMeta(a_Position, Meta & 0x07);
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a_World.WakeUpSimulators(a_Position);
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a_World.BroadcastSoundEffect(SoundToPlayOnRelease, a_Position, 0.5f, 0.5f);
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}
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);
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}
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/** Returns true if an arrow was found in the wooden button */
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static bool IsButtonPressedByArrow(cWorld & a_World, const Vector3i a_ButtonPosition, const BLOCKTYPE a_BlockType, const NIBBLETYPE a_Meta)
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{
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if (a_BlockType != E_BLOCK_WOODEN_BUTTON)
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{
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return false;
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}
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const auto FaceOffset = GetButtonOffsetOnBlock(a_Meta);
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const bool FoundArrow = !a_World.ForEachEntityInBox(
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cBoundingBox(FaceOffset + a_ButtonPosition, 0.2, 0.2),
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[](cEntity & a_Entity)
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{
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return a_Entity.IsArrow();
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}
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);
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return FoundArrow;
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}
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/** Returns an offset to the integer world coordinates of a button.
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Applying this offset yields the centre of the button's bounding box,
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in terms of the position within the block the button with given meta occupies.
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TODO: this is only approximate, return the exact bbox instead. */
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static Vector3d GetButtonOffsetOnBlock(NIBBLETYPE a_Meta)
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{
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switch (BlockMetaDataToBlockFace(a_Meta))
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{
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case BLOCK_FACE_YM: return { 0.5, 1, 0.5 };
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case BLOCK_FACE_XP: return { 0, 0.5, 0.5 };
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case BLOCK_FACE_XM: return { 1, 0.5, 0.5 };
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case BLOCK_FACE_ZP: return { 0.5, 0.5, 0 };
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case BLOCK_FACE_ZM: return { 0.5, 0.5, 1 };
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case BLOCK_FACE_YP: return { 0.5, 0, 0.5 };
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case BLOCK_FACE_NONE:
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{
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ASSERT(!"Unhandled block face!");
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return { 0, 0, 0 };
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}
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}
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UNREACHABLE(!"Unhandled block face!");
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}
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} ;
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