source: OniSplit/Particles/Attractor.cs

namespace Oni.Particles
{
    internal class Attractor
    {
        #region Private data
        private AttractorTarget target;
        private AttractorSelector selector;
        private string className;
        private Value maxDistance;
        private Value maxAngle;
        private Value angleSelectMin;
        private Value angleSelectMax;
        private Value angleSelectWeight;
        #endregion

        public Attractor()
        {
            target = AttractorTarget.None;
            selector = AttractorSelector.Distance;
            maxDistance = new Value(150.0f);
            maxAngle = new Value(30.0f);
            angleSelectMin = new Value(3.0f);
            angleSelectMax = new Value(3.0f);
            angleSelectWeight = new Value(3.0f);
        }

        public Attractor(BinaryReader reader)
        {
            target = (AttractorTarget)reader.ReadInt32();
            selector = (AttractorSelector)reader.ReadInt32();
            reader.Skip(4);
            className = reader.ReadString(64);
            maxDistance = Value.Read(reader);
            maxAngle = Value.Read(reader);
            angleSelectMin = Value.Read(reader);
            angleSelectMax = Value.Read(reader);
            angleSelectWeight = Value.Read(reader);
        }

        public void Write(BinaryWriter writer)
        {
            writer.Write((int)target);
            writer.Write((int)selector);
            writer.Skip(4);
            writer.Write(className, 64);
            maxDistance.Write(writer);
            maxAngle.Write(writer);
            angleSelectMin.Write(writer);
            angleSelectMax.Write(writer);
            angleSelectWeight.Write(writer);
        }

        public AttractorTarget Target
        {
            get { return target; }
            set { target = value; }
        }

        public AttractorSelector Selector
        {
            get { return selector; }
            set { selector = value; }
        }

        public string ClassName
        {
            get { return className; }
            set { className = value; }
        }

        public Value MaxDistance
        {
            get { return maxDistance; }
            set { maxDistance = value; }
        }

        public Value MaxAngle
        {
            get { return maxAngle; }
            set { maxAngle = value; }
        }

        public Value AngleSelectMin
        {
            get { return angleSelectMin; }
            set { angleSelectMin = value; }
        }

        public Value AngleSelectMax
        {
            get { return angleSelectMax; }
            set { angleSelectMax = value; }
        }

        public Value AngleSelectWeight
        {
            get { return angleSelectWeight; }
            set { angleSelectWeight = value; }
        }
    }
}