source: OniSplit/Objects/Trigger.cs@ 1114

using System;
using System.Xml;
using Oni.Imaging;
using Oni.Metadata;
using Oni.Xml;

namespace Oni.Objects
{
    internal class Trigger : GunkObject
    {
        public int ScriptId;
        public TriggerFlags Flags;
        public Color LaserColor;
        public float StartPosition;
        public float Speed;
        public int EmitterCount;
        public int TimeOn;
        public int TimeOff;
        public ObjectEvent[] Events;

        public Trigger()
        {
            TypeId = ObjectType.Trigger;
        }

        protected override void WriteOsd(BinaryWriter writer)
        {
            writer.Write(ClassName, 63);
            writer.WriteUInt16(ScriptId);
            writer.WriteUInt16((ushort)Flags);
            writer.Write(LaserColor);
            writer.Write(StartPosition);
            writer.Write(Speed);
            writer.WriteUInt16(EmitterCount);
            writer.WriteUInt16(TimeOn);
            writer.WriteUInt16(TimeOff);
            ObjectEvent.WriteEventList(writer, Events);
        }

        protected override void ReadOsd(BinaryReader reader)
        {
            ClassName = reader.ReadString(63);
            ScriptId = reader.ReadUInt16();
            Flags = (TriggerFlags)(reader.ReadUInt16() & ~0x84);
            LaserColor = reader.ReadColor();
            StartPosition = reader.ReadSingle();
            Speed = reader.ReadSingle();
            EmitterCount = reader.ReadUInt16();
            TimeOn = reader.ReadUInt16();
            TimeOff = reader.ReadUInt16();
            Events = ObjectEvent.ReadEventList(reader);
        }

        protected override void WriteOsd(XmlWriter xml)
        {
            throw new NotImplementedException();
        }

        protected override void ReadOsd(XmlReader xml, ObjectLoadContext context)
        {
            string className = xml.ReadElementContentAsString("Class", "");

            ScriptId = xml.ReadElementContentAsInt("TriggerId", "");
            Flags = xml.ReadElementContentAsEnum<TriggerFlags>("Flags");

            byte[] values = xml.ReadElementContentAsArray<byte>(XmlConvert.ToByte, "LaserColor");

            if (values.Length > 3)
                LaserColor = new Color(values[0], values[1], values[2], values[3]);
            else
                LaserColor = new Color(values[0], values[1], values[2]);

            StartPosition = xml.ReadElementContentAsFloat("StartPosition", "");
            Speed = xml.ReadElementContentAsFloat("Speed", "");
            EmitterCount = xml.ReadElementContentAsInt("EmitterCount", "");

            if (xml.IsStartElement("Offset_0075"))
                TimeOn = xml.ReadElementContentAsInt();
            else
                TimeOn = xml.ReadElementContentAsInt("TimeOn", "");

            if (xml.IsStartElement("Offset_0077"))
                TimeOff = xml.ReadElementContentAsInt();
            else
                TimeOff = xml.ReadElementContentAsInt("TimeOff", "");

            Events = ObjectEvent.ReadEventList(xml);

            GunkClass = context.GetClass(TemplateTag.TRIG, className, TriggerClass.Read);
        }
    }
}