source: OniSplit/Particles/ImpactEffectParticle.cs@ 1156

using System;
using System.Collections.Generic;
using System.Xml;

namespace Oni.Particles
{
    internal class ImpactEffectParticle
    {
        #region Private data
        private string particleClassName;
        private int orientation;
        private int location;
        private float offset;
        private bool decal1;
        private bool decal2;
        #endregion

        public ImpactEffectParticle(BinaryReader reader)
        {
            particleClassName = reader.ReadString(64);
            reader.Skip(4);
            orientation = reader.ReadInt32();
            location = reader.ReadInt32();

            switch (location)
            {
                case 1:
                    offset = reader.ReadSingle();
                    reader.Skip(4);
                    break;
                case 4:
                    decal1 = (reader.ReadByte() != 0);
                    decal2 = (reader.ReadByte() != 0);
                    reader.Skip(6);
                    break;
                default:
                    reader.Skip(8);
                    break;
            }
        }

        public void Write(BinaryWriter writer)
        {
            writer.Write(particleClassName, 64);
            writer.Skip(4);
            writer.Write(orientation);
            writer.Write(location);

            switch (location)
            {
                case 1:
                    writer.Write(offset);
                    break;

                case 4:
                    writer.WriteByte(decal1 ? 1 : 0);
                    writer.WriteByte(decal2 ? 1 : 0);
                    writer.WriteUInt16(0);
                    break;

                default:
                    writer.Write(0);
                    break;
            }

            writer.Write(0);
        }

        public ImpactEffectParticle(XmlReader xml)
        {
            particleClassName = xml.ReadElementContentAsString("Name", "");
            orientation = XmlConvert.ToInt32(xml.ReadElementContentAsString("Orientation", ""));
            location = XmlConvert.ToInt32(xml.ReadElementContentAsString("Location", ""));

            switch (location)
            {
                case 1:
                    offset = XmlConvert.ToSingle(xml.ReadElementContentAsString("Offset", ""));
                    break;
                case 4:
                    decal1 = bool.Parse(xml.ReadElementContentAsString("Decal1", ""));
                    decal2 = bool.Parse(xml.ReadElementContentAsString("Decal2", ""));
                    break;
            }
        }

        public void Write(XmlWriter writer)
        {
            writer.WriteElementString("Name", particleClassName);
            writer.WriteElementString("Orientation", XmlConvert.ToString(orientation));
            writer.WriteElementString("Location", XmlConvert.ToString(location));

            switch (location)
            {
                case 1:
                    writer.WriteElementString("Offset", XmlConvert.ToString(offset));
                    break;
                case 4:
                    writer.WriteElementString("Decal1", XmlConvert.ToString(decal1));
                    writer.WriteElementString("Decal2", XmlConvert.ToString(decal2));
                    break;
            }
        }

        public string ParticleClassName => particleClassName;

        public int Orientation => orientation;
        public int Location => location;
        public float Offset => offset;

        public bool Decal1 => decal1;
        public bool Decal2 => decal2;
    }
}