up3

server/item/flint_and_steel.go

@@ -0,0 +1,71 @@
+package item
+
+import (
+	"github.com/df-mc/dragonfly/server/block/cube"
+	"github.com/df-mc/dragonfly/server/world"
+	"github.com/df-mc/dragonfly/server/world/sound"
+	"github.com/go-gl/mathgl/mgl64"
+	"math/rand/v2"
+	"time"
+)
+
+// FlintAndSteel is an item used to light blocks on fire.
+type FlintAndSteel struct{}
+
+// MaxCount ...
+func (f FlintAndSteel) MaxCount() int {
+	return 1
+}
+
+// DurabilityInfo ...
+func (f FlintAndSteel) DurabilityInfo() DurabilityInfo {
+	return DurabilityInfo{
+		MaxDurability: 65,
+		BrokenItem:    simpleItem(Stack{}),
+	}
+}
+
+// ignitable represents a block that can be lit by a fire emitter, such as flint and steel.
+type ignitable interface {
+	// Ignite is called when the block is lit by flint and steel.
+	Ignite(pos cube.Pos, tx *world.Tx, igniter world.Entity) bool
+}
+
+// UseOnBlock ...
+func (f FlintAndSteel) UseOnBlock(pos cube.Pos, face cube.Face, _ mgl64.Vec3, tx *world.Tx, user User, ctx *UseContext) bool {
+	ctx.DamageItem(1)
+	if l, ok := tx.Block(pos).(ignitable); ok && l.Ignite(pos, tx, user) {
+		return true
+	} else if s := pos.Side(face); tx.Block(s) == air() {
+		tx.PlaySound(s.Vec3Centre(), sound.Ignite{})
+
+		flame := fire()
+		tx.SetBlock(s, flame, nil)
+		tx.ScheduleBlockUpdate(s, flame, time.Duration(30+rand.IntN(10))*time.Second/20)
+		return true
+	}
+	return false
+}
+
+// EncodeItem ...
+func (f FlintAndSteel) EncodeItem() (name string, meta int16) {
+	return "minecraft:flint_and_steel", 0
+}
+
+// air returns an air block.
+func air() world.Block {
+	a, ok := world.BlockByName("minecraft:air", nil)
+	if !ok {
+		panic("could not find air block")
+	}
+	return a
+}
+
+// fire returns a fire block.
+func fire() world.Block {
+	f, ok := world.BlockByName("minecraft:fire", map[string]any{"age": int32(0)})
+	if !ok {
+		panic("could not find fire block")
+	}
+	return f
+}