up3

server/item/shears.go

@@ -0,0 +1,69 @@
+package item
+
+import (
+	"github.com/df-mc/dragonfly/server/block/cube"
+	"github.com/df-mc/dragonfly/server/world"
+	"github.com/go-gl/mathgl/mgl64"
+)
+
+// Shears is a tool used to shear sheep, mine a few types of blocks, and carve pumpkins.
+type Shears struct{}
+
+// UseOnBlock ...
+func (s Shears) UseOnBlock(pos cube.Pos, face cube.Face, _ mgl64.Vec3, tx *world.Tx, _ User, ctx *UseContext) bool {
+	if face == cube.FaceUp || face == cube.FaceDown {
+		// Pumpkins can only be carved when one of the horizontal faces is clicked.
+		return false
+	}
+	if c, ok := tx.Block(pos).(carvable); ok {
+		if res, ok := c.Carve(face); ok {
+			// TODO: Drop pumpkin seeds.
+			tx.SetBlock(pos, res, nil)
+
+			ctx.DamageItem(1)
+			return true
+		}
+	}
+	return false
+}
+
+// carvable represents a block that may be carved by using shears on it.
+type carvable interface {
+	// Carve returns the resulting block of carving this block. If carving it has no result, Carve returns false.
+	Carve(f cube.Face) (world.Block, bool)
+}
+
+// ToolType ...
+func (s Shears) ToolType() ToolType {
+	return TypeShears
+}
+
+// HarvestLevel ...
+func (s Shears) HarvestLevel() int {
+	return 1
+}
+
+// BaseMiningEfficiency ...
+func (s Shears) BaseMiningEfficiency(world.Block) float64 {
+	return 1.5
+}
+
+// DurabilityInfo ...
+func (s Shears) DurabilityInfo() DurabilityInfo {
+	return DurabilityInfo{
+		MaxDurability:    238,
+		BrokenItem:       simpleItem(Stack{}),
+		AttackDurability: 0,
+		BreakDurability:  1,
+	}
+}
+
+// MaxCount ...
+func (s Shears) MaxCount() int {
+	return 1
+}
+
+// EncodeItem ...
+func (s Shears) EncodeItem() (name string, meta int16) {
+	return "minecraft:shears", 0
+}