up3

server/entity/effect/wither.go

@@ -0,0 +1,38 @@
+package effect
+
+import (
+	"github.com/df-mc/dragonfly/server/world"
+	"image/color"
+)
+
+// Wither is a lasting effect that causes an entity to take continuous damage
+// that is capable of killing an entity.
+var Wither wither
+
+type wither struct {
+	nopLasting
+}
+
+// Apply ...
+func (wither) Apply(e world.Entity, eff Effect) {
+	interval := max(80>>eff.Level(), 1)
+	if eff.Tick()%interval == 0 {
+		if l, ok := e.(living); ok {
+			l.Hurt(1, WitherDamageSource{})
+		}
+	}
+}
+
+// RGBA ...
+func (wither) RGBA() color.RGBA {
+	return color.RGBA{R: 0x73, G: 0x61, B: 0x56, A: 0xff}
+}
+
+// WitherDamageSource is used for damage caused by an effect.wither applied
+// to an entity.
+type WitherDamageSource struct{}
+
+func (WitherDamageSource) ReducedByResistance() bool { return true }
+func (WitherDamageSource) ReducedByArmour() bool     { return false }
+func (WitherDamageSource) Fire() bool                { return false }
+func (WitherDamageSource) IgnoreTotem() bool         { return false }