up3

server/block/lantern.go

@@ -0,0 +1,110 @@
+package block
+
+import (
+	"github.com/df-mc/dragonfly/server/block/cube"
+	"github.com/df-mc/dragonfly/server/block/model"
+	"github.com/df-mc/dragonfly/server/item"
+	"github.com/df-mc/dragonfly/server/world"
+	"github.com/go-gl/mathgl/mgl64"
+)
+
+// Lantern is a light emitting block.
+type Lantern struct {
+	transparent
+	sourceWaterDisplacer
+
+	// Hanging determines if a lantern is hanging off a block.
+	Hanging bool
+	// Type of fire lighting the lantern.
+	Type FireType
+}
+
+// Model ...
+func (l Lantern) Model() world.BlockModel {
+	return model.Lantern{Hanging: l.Hanging}
+}
+
+// NeighbourUpdateTick ...
+func (l Lantern) NeighbourUpdateTick(pos, _ cube.Pos, tx *world.Tx) {
+	if l.Hanging {
+		up := pos.Side(cube.FaceUp)
+		if _, ok := tx.Block(up).(IronChain); !ok && !tx.Block(up).Model().FaceSolid(up, cube.FaceDown, tx) {
+			breakBlock(l, pos, tx)
+		}
+	} else {
+		down := pos.Side(cube.FaceDown)
+		if !tx.Block(down).Model().FaceSolid(down, cube.FaceUp, tx) {
+			breakBlock(l, pos, tx)
+		}
+	}
+}
+
+// LightEmissionLevel ...
+func (l Lantern) LightEmissionLevel() uint8 {
+	return l.Type.LightLevel()
+}
+
+// UseOnBlock ...
+func (l Lantern) UseOnBlock(pos cube.Pos, face cube.Face, _ mgl64.Vec3, tx *world.Tx, user item.User, ctx *item.UseContext) bool {
+	pos, face, used := firstReplaceable(tx, pos, face, l)
+	if !used {
+		return false
+	}
+	if face == cube.FaceDown {
+		upPos := pos.Side(cube.FaceUp)
+		if _, ok := tx.Block(upPos).(IronChain); !ok && !tx.Block(upPos).Model().FaceSolid(upPos, cube.FaceDown, tx) {
+			face = cube.FaceUp
+		}
+	}
+	if face != cube.FaceDown {
+		downPos := pos.Side(cube.FaceDown)
+		if !tx.Block(downPos).Model().FaceSolid(downPos, cube.FaceUp, tx) {
+			return false
+		}
+	}
+	l.Hanging = face == cube.FaceDown
+
+	place(tx, pos, l, user, ctx)
+	return placed(ctx)
+}
+
+// SideClosed ...
+func (l Lantern) SideClosed(cube.Pos, cube.Pos, *world.Tx) bool {
+	return false
+}
+
+// BreakInfo ...
+func (l Lantern) BreakInfo() BreakInfo {
+	return newBreakInfo(3.5, pickaxeHarvestable, pickaxeEffective, oneOf(l))
+}
+
+// EncodeItem ...
+func (l Lantern) EncodeItem() (name string, meta int16) {
+	switch l.Type {
+	case NormalFire():
+		return "minecraft:lantern", 0
+	case SoulFire():
+		return "minecraft:soul_lantern", 0
+	}
+	panic("invalid fire type")
+}
+
+// EncodeBlock ...
+func (l Lantern) EncodeBlock() (name string, properties map[string]any) {
+	switch l.Type {
+	case NormalFire():
+		return "minecraft:lantern", map[string]any{"hanging": l.Hanging}
+	case SoulFire():
+		return "minecraft:soul_lantern", map[string]any{"hanging": l.Hanging}
+	}
+	panic("invalid fire type")
+}
+
+// allLanterns ...
+func allLanterns() (lanterns []world.Block) {
+	for _, f := range FireTypes() {
+		lanterns = append(lanterns, Lantern{Hanging: false, Type: f})
+		lanterns = append(lanterns, Lantern{Hanging: true, Type: f})
+	}
+	return
+}