up3

server/entity/effect/poison.go

@@ -0,0 +1,42 @@
+package effect
+
+import (
+	"github.com/df-mc/dragonfly/server/world"
+	"image/color"
+)
+
+// Poison is a lasting effect that causes the affected entity to lose health
+// gradually. poison cannot kill, unlike fatalPoison.
+var Poison poison
+
+type poison struct {
+	nopLasting
+}
+
+// Apply ...
+func (poison) Apply(e world.Entity, eff Effect) {
+	interval := max(50>>(eff.Level()-1), 1)
+	if eff.Tick()%interval == 0 {
+		if l, ok := e.(living); ok && l.Health() > 1 {
+			l.Hurt(1, PoisonDamageSource{})
+		}
+	}
+}
+
+// RGBA ...
+func (poison) RGBA() color.RGBA {
+	return color.RGBA{R: 0x87, G: 0xa3, B: 0x63, A: 0xff}
+}
+
+// PoisonDamageSource is used for damage caused by an effect.poison or
+// effect.fatalPoison applied to an entity.
+type PoisonDamageSource struct {
+	// Fatal specifies if the damage was caused by effect.fatalPoison and if
+	// the damage could therefore kill the entity.
+	Fatal bool
+}
+
+func (PoisonDamageSource) ReducedByResistance() bool { return true }
+func (PoisonDamageSource) ReducedByArmour() bool     { return false }
+func (PoisonDamageSource) Fire() bool                { return false }
+func (PoisonDamageSource) IgnoreTotem() bool         { return false }