up3

server/item/enchantment/sharpness.go

@@ -0,0 +1,49 @@
+package enchantment
+
+import (
+	"github.com/df-mc/dragonfly/server/item"
+	"github.com/df-mc/dragonfly/server/world"
+)
+
+// Sharpness is an enchantment applied to a sword or axe that increases melee
+// damage.
+var Sharpness sharpness
+
+type sharpness struct{}
+
+// Name ...
+func (sharpness) Name() string {
+	return "Sharpness"
+}
+
+// MaxLevel ...
+func (sharpness) MaxLevel() int {
+	return 5
+}
+
+// Cost ...
+func (sharpness) Cost(level int) (int, int) {
+	minCost := 1 + (level-1)*11
+	return minCost, minCost + 20
+}
+
+// Rarity ...
+func (sharpness) Rarity() item.EnchantmentRarity {
+	return item.EnchantmentRarityCommon
+}
+
+// Addend returns the additional damage when attacking with sharpness.
+func (sharpness) Addend(level int) float64 {
+	return float64(level) * 1.25
+}
+
+// CompatibleWithEnchantment ...
+func (sharpness) CompatibleWithEnchantment(item.EnchantmentType) bool {
+	return true
+}
+
+// CompatibleWithItem ...
+func (sharpness) CompatibleWithItem(i world.Item) bool {
+	t, ok := i.(item.Tool)
+	return ok && (t.ToolType() == item.TypeSword || t.ToolType() == item.TypeAxe)
+}