feat: add redstone core engine and basic sources

server/block/lever.go

@@ -23,22 +23,17 @@ type Lever struct {
 	Direction cube.Direction
 }
 
-// RedstoneSource ...
-func (l Lever) RedstoneSource() bool {
-	return true
-}
-
-// WeakPower ...
-func (l Lever) WeakPower(cube.Pos, cube.Face, *world.Tx, bool) int {
+// RedstonePower returns maximum power while the lever is active.
+func (l Lever) RedstonePower(cube.Pos, *world.Tx, cube.Face) int {
 	if l.Powered {
 		return 15
 	}
 	return 0
 }
 
-// StrongPower ...
-func (l Lever) StrongPower(_ cube.Pos, face cube.Face, _ *world.Tx, _ bool) int {
-	if l.Powered && l.Facing == face {
+// RedstoneStrongPower strongly powers the block the lever is attached to.
+func (l Lever) RedstoneStrongPower(_ cube.Pos, _ *world.Tx, face cube.Face) int {
+	if l.Powered && l.Facing.Opposite() == face {
 		return 15
 	}
 	return 0
@@ -87,14 +82,13 @@ func (l Lever) Activate(pos cube.Pos, _ cube.Face, tx *world.Tx, _ item.User, _
 	} else {
 		tx.PlaySound(pos.Vec3Centre(), sound.PowerOff{})
 	}
-	updateDirectionalRedstone(pos, tx, l.Facing.Opposite())
 	return true
 }
 
 // BreakInfo ...
 func (l Lever) BreakInfo() BreakInfo {
 	return newBreakInfo(0.5, alwaysHarvestable, nothingEffective, oneOf(Lever{})).withBreakHandler(func(pos cube.Pos, tx *world.Tx, _ item.User) {
-		updateDirectionalRedstone(pos, tx, l.Facing.Opposite())
+		tx.ScheduleRedstoneUpdate(pos)
 	})
 }
 

server/block/note.go

@@ -61,19 +61,17 @@ func (n Note) Activate(pos cube.Pos, _ cube.Face, tx *world.Tx, _ item.User, _ *
 	return true
 }
 
-// RedstoneUpdate updates the note block's powered state and plays the note when it first becomes powered.
-func (n Note) RedstoneUpdate(pos cube.Pos, tx *world.Tx) {
-	poweredFaces := n.poweredFaces(pos, tx)
-	powered := len(poweredFaces) > 0
+// RedstonePowerUpdate updates the note block's powered state and plays the note when it first becomes powered.
+func (n Note) RedstonePowerUpdate(pos cube.Pos, tx *world.Tx, power int) (world.Block, bool) {
+	powered := power > 0
 	if powered == n.Powered {
-		return
+		return n, false
 	}
 	n.Powered = powered
 	if powered && n.canPlay(pos, tx) {
 		n.playNote(pos, tx)
 	}
-	tx.SetBlock(pos, n, &world.SetOpts{DisableBlockUpdates: true})
-	updateAroundRedstone(pos, tx, poweredFaces...)
+	return n, true
 }
 
 // canPlay reports whether the block above the note block is air.
@@ -82,17 +80,6 @@ func (n Note) canPlay(pos cube.Pos, tx *world.Tx) bool {
 	return ok
 }
 
-func (n Note) poweredFaces(pos cube.Pos, tx *world.Tx) []cube.Face {
-	var faces []cube.Face
-	for _, face := range cube.Faces() {
-		adjacentPos := pos.Side(face)
-		if power := tx.RedstonePower(adjacentPos, face, true); power > 0 {
-			faces = append(faces, face)
-		}
-	}
-	return faces
-}
-
 // BreakInfo ...
 func (n Note) BreakInfo() BreakInfo {
 	return newBreakInfo(0.8, alwaysHarvestable, axeEffective, oneOf(Note{}))