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-rw-r--r--src/Simulator/IncrementalRedstoneSimulator/RedstoneRepeaterHandler.h90
1 files changed, 85 insertions, 5 deletions
diff --git a/src/Simulator/IncrementalRedstoneSimulator/RedstoneRepeaterHandler.h b/src/Simulator/IncrementalRedstoneSimulator/RedstoneRepeaterHandler.h
index 9a0e26100..0cd65be53 100644
--- a/src/Simulator/IncrementalRedstoneSimulator/RedstoneRepeaterHandler.h
+++ b/src/Simulator/IncrementalRedstoneSimulator/RedstoneRepeaterHandler.h
@@ -15,11 +15,6 @@ class cRedstoneRepeaterHandler:
public:
- inline static bool IsOn(BLOCKTYPE a_Block)
- {
- return (a_Block == E_BLOCK_REDSTONE_REPEATER_ON);
- }
-
virtual unsigned char GetPowerDeliveredToPosition(cWorld & a_World, Vector3i a_Position, BLOCKTYPE a_BlockType, NIBBLETYPE a_Meta, Vector3i a_QueryPosition, BLOCKTYPE a_QueryBlockType) const override
{
return (
@@ -42,6 +37,17 @@ public:
auto Data = static_cast<cIncrementalRedstoneSimulator *>(a_World.GetRedstoneSimulator())->GetChunkData();
auto DelayInfo = Data->GetMechanismDelayInfo(a_Position);
+ // If the repeater is locked by another, ignore and forget all power changes:
+ if (IsLocked(a_World, a_Position, a_Meta))
+ {
+ if (DelayInfo != nullptr)
+ {
+ Data->m_MechanismDelays.erase(a_Position);
+ }
+
+ return {};
+ }
+
if (DelayInfo == nullptr)
{
bool ShouldBeOn = (a_PoweringData.PowerLevel != 0);
@@ -71,4 +77,78 @@ public:
{
return { cBlockRedstoneRepeaterHandler::GetRearCoordinateOffset(a_Meta) + a_Position };
}
+
+private:
+
+ inline static bool IsOn(BLOCKTYPE a_Block)
+ {
+ return (a_Block == E_BLOCK_REDSTONE_REPEATER_ON);
+ }
+
+ /** Returns a pair with first element indicating if the block at the given position is an activated repeater.
+ If it is activated, the second element is the repeater metadata. */
+ static std::pair<bool, NIBBLETYPE> IsOnRepeater(cWorld & a_World, const Vector3i a_Position)
+ {
+ BLOCKTYPE Type;
+ NIBBLETYPE Meta;
+
+ if (!a_World.GetBlockTypeMeta(a_Position, Type, Meta))
+ {
+ return std::make_pair(false, 0);
+ }
+
+ return std::make_pair(IsOn(Type), Meta);
+ }
+
+ /** Determine if a repeater is locked.
+ A locked repeater is one with another powered repeater facing them, to their immediate left or right sides.
+ "Left" is relative to the direction the repeater output faces, naturally. */
+ inline static bool IsLocked(cWorld & a_World, const Vector3i a_Position, const NIBBLETYPE a_Meta)
+ {
+ // The left hand side offset. Will be negated to get the rhs offset
+ const auto LhsOffset = cBlockRedstoneRepeaterHandler::GetLeftCoordinateOffset(a_Meta);
+
+ // Test the block to the left of us
+ const auto Lhs = IsOnRepeater(a_World, LhsOffset + a_Position);
+ if (Lhs.first && DoesLhsLockMe(Lhs.second, a_Meta))
+ {
+ return true;
+ }
+
+ // Test the right side, flipping the argument order to DoesLhsLockMe
+ const auto Rhs = IsOnRepeater(a_World, -LhsOffset + a_Position);
+ return Rhs.first && DoesLhsLockMe(a_Meta, Rhs.second);
+ }
+
+ /** Determine, from the metadata of a repeater on our left side, if they lock us.
+ To test a repeater on our right, simply invert the order of arguments provided.
+ "Left" is relative to the direction the repeater output faces, naturally. */
+ static bool DoesLhsLockMe(NIBBLETYPE a_MetaLhs, NIBBLETYPE a_MyMeta)
+ {
+ // Get the direction bits
+ a_MetaLhs &= E_META_REDSTONE_REPEATER_FACING_MASK;
+ a_MyMeta &= E_META_REDSTONE_REPEATER_FACING_MASK;
+
+ /*
+ Check for a valid locking configuration, where they are perpendicular and one snuggles into the other.
+
+ Order of comparisons:
+ XP >^ ZM
+ ZP |_ XP
+ XM <| ZP
+ ZP ^< xM
+
+ Key:
+ ^ Facing up
+ _ Facing right
+ | Facing down
+ < Facing left
+ */
+ return
+ ((a_MetaLhs == E_META_REDSTONE_REPEATER_FACING_XP) && (a_MyMeta == E_META_REDSTONE_REPEATER_FACING_ZM)) ||
+ ((a_MetaLhs == E_META_REDSTONE_REPEATER_FACING_ZP) && (a_MyMeta == E_META_REDSTONE_REPEATER_FACING_XP)) ||
+ ((a_MetaLhs == E_META_REDSTONE_REPEATER_FACING_XM) && (a_MyMeta == E_META_REDSTONE_REPEATER_FACING_ZP)) ||
+ ((a_MetaLhs == E_META_REDSTONE_REPEATER_FACING_ZM) && (a_MyMeta == E_META_REDSTONE_REPEATER_FACING_XM))
+ ;
+ }
};