Add 1.21.20

legacyver/proto/attribute.go

@@ -0,0 +1,58 @@
+package proto
+
+import "github.com/sandertv/gophertunnel/minecraft/protocol"
+
+// Attribute is an entity attribute, that holds specific data such as the health of the entity. Each attribute
+// holds a default value, maximum and minimum value, name and its current value.
+type Attribute struct {
+	protocol.AttributeValue
+	// DefaultMin is the default minimum value of the attribute. It's not clear why this field must be sent to
+	// the client, but it is required regardless.
+	DefaultMin float32
+	// DefaultMax is the default maximum value of the attribute. It's not clear why this field must be sent to
+	// the client, but it is required regardless.
+	DefaultMax float32
+	// Default is the default value of the attribute. It's not clear why this field must be sent to the
+	// client, but it is required regardless.
+	Default float32
+	// Modifiers is a slice of AttributeModifiers that are applied to the attribute.
+	Modifiers []protocol.AttributeModifier
+}
+
+func (x *Attribute) FromLatest(v protocol.Attribute) Attribute {
+	x.AttributeValue = v.AttributeValue
+	x.DefaultMin = v.DefaultMin
+	x.DefaultMax = v.DefaultMax
+	x.Default = v.Default
+	x.Modifiers = v.Modifiers
+	return *x
+}
+
+func (x *Attribute) ToLatest() protocol.Attribute {
+	return protocol.Attribute{
+		AttributeValue: protocol.AttributeValue{
+			Name:  x.Name,
+			Value: x.Value,
+			Max:   x.Max,
+			Min:   x.Min,
+		},
+		DefaultMin: x.DefaultMin,
+		DefaultMax: x.DefaultMax,
+		Default:    x.Default,
+		Modifiers:  x.Modifiers,
+	}
+}
+
+// Marshal encodes/decodes an Attribute.
+func (x *Attribute) Marshal(r protocol.IO) {
+	r.Float32(&x.Min)
+	r.Float32(&x.Max)
+	r.Float32(&x.Value)
+	if IsProtoGTE(r, ID729) {
+		r.Float32(&x.DefaultMin)
+		r.Float32(&x.DefaultMax)
+	}
+	r.Float32(&x.Default)
+	r.String(&x.Name)
+	protocol.Slice(r, &x.Modifiers)
+}