opensim/OpenSim/Framework/PrimitiveBaseShape.cs

/*
 * Copyright (c) Contributors, http://opensimulator.org/
 * See CONTRIBUTORS.TXT for a full list of copyright holders.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the OpenSimulator Project nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.Reflection;
using System.Xml.Serialization;
using log4net;
using OpenMetaverse;

namespace OpenSim.Framework
{
    public enum ProfileShape : byte
    {
        Circle = 0,
        Square = 1,
        IsometricTriangle = 2,
        EquilateralTriangle = 3,
        RightTriangle = 4,
        HalfCircle = 5
    }

    public enum HollowShape : byte
    {
        Same = 0,
        Circle = 16,
        Square = 32,
        Triangle = 48
    }

    public enum PCodeEnum : byte
    {
        Primitive = 9,
        Avatar = 47,
        Grass = 95,
        NewTree = 111,
        ParticleSystem = 143,
        Tree = 255
    }

    public enum Extrusion : byte
    {
        Straight = 16,
        Curve1 = 32,
        Curve2 = 48,
        Flexible = 128
    }

    [Serializable]
    public class PrimitiveBaseShape
    {
        private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);

        private static readonly Primitive.TextureEntry m_defaultTexture;

        private byte[] m_textureEntry;

        private ushort _pathBegin;
        private byte _pathCurve;
        private ushort _pathEnd;
        private sbyte _pathRadiusOffset;
        private byte _pathRevolutions;
        private byte _pathScaleX;
        private byte _pathScaleY;
        private byte _pathShearX;
        private byte _pathShearY;
        private sbyte _pathSkew;
        private sbyte _pathTaperX;
        private sbyte _pathTaperY;
        private sbyte _pathTwist;
        private sbyte _pathTwistBegin;
        private byte _pCode;
        private ushort _profileBegin;
        private ushort _profileEnd;
        private ushort _profileHollow;
        private Vector3 _scale;
        private byte _state;
        private ProfileShape _profileShape;
        private HollowShape _hollowShape;

        // Sculpted
        [XmlIgnore] private UUID _sculptTexture = UUID.Zero;
        [XmlIgnore] private byte _sculptType = (byte)0;
        [XmlIgnore] private byte[] _sculptData = new byte[0];
        [XmlIgnore] private Image _sculptBitmap = null;

        // Flexi
        [XmlIgnore] private int _flexiSoftness = 0;
        [XmlIgnore] private float _flexiTension = 0f;
        [XmlIgnore] private float _flexiDrag = 0f;
        [XmlIgnore] private float _flexiGravity = 0f;
        [XmlIgnore] private float _flexiWind = 0f;
        [XmlIgnore] private float _flexiForceX = 0f;
        [XmlIgnore] private float _flexiForceY = 0f;
        [XmlIgnore] private float _flexiForceZ = 0f;

        //Bright n sparkly
        [XmlIgnore] private float _lightColorR = 0f;
        [XmlIgnore] private float _lightColorG = 0f;
        [XmlIgnore] private float _lightColorB = 0f;
        [XmlIgnore] private float _lightColorA = 1f;
        [XmlIgnore] private float _lightRadius = 0f;
        [XmlIgnore] private float _lightCutoff = 0f;
        [XmlIgnore] private float _lightFalloff = 0f;
        [XmlIgnore] private float _lightIntensity = 1f;
        [XmlIgnore] private bool _flexiEntry = false;
        [XmlIgnore] private bool _lightEntry = false;
        [XmlIgnore] private bool _sculptEntry = false;

        public byte ProfileCurve
        {
            get { return (byte)((byte)HollowShape | (byte)ProfileShape); }

            set
            {
                // Handle hollow shape component
                byte hollowShapeByte = (byte)(value & 0xf0);

                if (!Enum.IsDefined(typeof(HollowShape), hollowShapeByte))
                {
                    m_log.WarnFormat(
                        "[SHAPE]: Attempt to set a ProfileCurve with a hollow shape value of {0}, which isn't a valid enum.  Replacing with default shape.",
                        hollowShapeByte);

                    this._hollowShape = HollowShape.Same;
                }
                else
                {
                    this._hollowShape = (HollowShape)hollowShapeByte;
                }

                // Handle profile shape component
                byte profileShapeByte = (byte)(value & 0xf);

                if (!Enum.IsDefined(typeof(ProfileShape), profileShapeByte))
                {
                    m_log.WarnFormat(
                        "[SHAPE]: Attempt to set a ProfileCurve with a profile shape value of {0}, which isn't a valid enum.  Replacing with square.",
                        profileShapeByte);

                    this._profileShape = ProfileShape.Square;
                }
                else
                {
                    this._profileShape = (ProfileShape)profileShapeByte;
                }
            }
        }

        static PrimitiveBaseShape()
        {
            m_defaultTexture =
                new Primitive.TextureEntry(new UUID("89556747-24cb-43ed-920b-47caed15465f"));
        }

        public PrimitiveBaseShape()
        {
            PCode = (byte) PCodeEnum.Primitive;
            ExtraParams = new byte[1];
            Textures = m_defaultTexture;
        }

        public PrimitiveBaseShape(bool noShape)
        {
            if (noShape)
                return;

            PCode = (byte)PCodeEnum.Primitive;
            ExtraParams = new byte[1];
            Textures = m_defaultTexture;
        }

        [XmlIgnore]
        public Primitive.TextureEntry Textures
        {
            get
            {
                //m_log.DebugFormat("[PRIMITIVE BASE SHAPE]: get m_textureEntry length {0}", m_textureEntry.Length);
                return new Primitive.TextureEntry(m_textureEntry, 0, m_textureEntry.Length);
            }

            set { m_textureEntry = value.GetBytes(); }
        }

        public byte[] TextureEntry
        {
            get { return m_textureEntry; }

            set
            {
                if (value == null)
                    m_textureEntry = new byte[1];
                else
                    m_textureEntry = value;
            }
        }

        public static PrimitiveBaseShape Default
        {
            get
            {
                PrimitiveBaseShape boxShape = CreateBox();

                boxShape.SetScale(0.5f);

                return boxShape;
            }
        }

        public static PrimitiveBaseShape Create()
        {
            PrimitiveBaseShape shape = new PrimitiveBaseShape();
            return shape;
        }

        public static PrimitiveBaseShape CreateBox()
        {
            PrimitiveBaseShape shape = Create();

            shape._pathCurve = (byte) Extrusion.Straight;
            shape._profileShape = ProfileShape.Square;
            shape._pathScaleX = 100;
            shape._pathScaleY = 100;

            return shape;
        }

        public static PrimitiveBaseShape CreateSphere()
        {
            PrimitiveBaseShape shape = Create();

            shape._pathCurve = (byte) Extrusion.Curve1;
            shape._profileShape = ProfileShape.HalfCircle;
            shape._pathScaleX = 100;
            shape._pathScaleY = 100;

            return shape;
        }

        public static PrimitiveBaseShape CreateCylinder()
        {
            PrimitiveBaseShape shape = Create();

            shape._pathCurve = (byte) Extrusion.Curve1;
            shape._profileShape = ProfileShape.Square;

            shape._pathScaleX = 100;
            shape._pathScaleY = 100;

            return shape;
        }

        public void SetScale(float side)
        {
            _scale = new Vector3(side, side, side);
        }

        public void SetHeigth(float heigth)
        {
            _scale.Z = heigth;
        }

        public void SetRadius(float radius)
        {
            _scale.X = _scale.Y = radius * 2f;
        }

        // TODO: void returns need to change of course
        public virtual void GetMesh()
        {
        }

        public PrimitiveBaseShape Copy()
        {
            return (PrimitiveBaseShape) MemberwiseClone();
        }

        public static PrimitiveBaseShape CreateCylinder(float radius, float heigth)
        {
            PrimitiveBaseShape shape = CreateCylinder();

            shape.SetHeigth(heigth);
            shape.SetRadius(radius);

            return shape;
        }

        public void SetPathRange(Vector3 pathRange)
        {
            _pathBegin = Primitive.PackBeginCut(pathRange.X);
            _pathEnd = Primitive.PackEndCut(pathRange.Y);
        }

        public void SetPathRange(float begin, float end)
        {
            _pathBegin = Primitive.PackBeginCut(begin);
            _pathEnd = Primitive.PackEndCut(end);
        }

        public void SetSculptData(byte sculptType, UUID SculptTextureUUID)
        {
            _sculptType = sculptType;
            _sculptTexture = SculptTextureUUID;
        }

        public void SetProfileRange(Vector3 profileRange)
        {
            _profileBegin = Primitive.PackBeginCut(profileRange.X);
            _profileEnd = Primitive.PackEndCut(profileRange.Y);
        }

        public void SetProfileRange(float begin, float end)
        {
            _profileBegin = Primitive.PackBeginCut(begin);
            _profileEnd = Primitive.PackEndCut(end);
        }

        public byte[] ExtraParams
        {
            get
            {
                return ExtraParamsToBytes();
            }
            set
            {
                ReadInExtraParamsBytes(value);
            }
        }

        public ushort PathBegin {
            get {
                return _pathBegin;
            }
            set {
                _pathBegin = value;
            }
        }

        public byte PathCurve {
            get {
                return _pathCurve;
            }
            set {
                _pathCurve = value;
            }
        }

        public ushort PathEnd {
            get {
                return _pathEnd;
            }
            set {
                _pathEnd = value;
            }
        }

        public sbyte PathRadiusOffset {
            get {
                return _pathRadiusOffset;
            }
            set {
                _pathRadiusOffset = value;
            }
        }

        public byte PathRevolutions {
            get {
                return _pathRevolutions;
            }
            set {
                _pathRevolutions = value;
            }
        }

        public byte PathScaleX {
            get {
                return _pathScaleX;
            }
            set {
                _pathScaleX = value;
            }
        }

        public byte PathScaleY {
            get {
                return _pathScaleY;
            }
            set {
                _pathScaleY = value;
            }
        }

        public byte PathShearX {
            get {
                return _pathShearX;
            }
            set {
                _pathShearX = value;
            }
        }

        public byte PathShearY {
            get {
                return _pathShearY;
            }
            set {
                _pathShearY = value;
            }
        }

        public sbyte PathSkew {
            get {
                return _pathSkew;
            }
            set {
                _pathSkew = value;
            }
        }

        public sbyte PathTaperX {
            get {
                return _pathTaperX;
            }
            set {
                _pathTaperX = value;
            }
        }

        public sbyte PathTaperY {
            get {
                return _pathTaperY;
            }
            set {
                _pathTaperY = value;
            }
        }

        public sbyte PathTwist {
            get {
                return _pathTwist;
            }
            set {
                _pathTwist = value;
            }
        }

        public sbyte PathTwistBegin {
            get {
                return _pathTwistBegin;
            }
            set {
                _pathTwistBegin = value;
            }
        }

        public byte PCode {
            get {
                return _pCode;
            }
            set {
                _pCode = value;
            }
        }

        public ushort ProfileBegin {
            get {
                return _profileBegin;
            }
            set {
                _profileBegin = value;
            }
        }

        public ushort ProfileEnd {
            get {
                return _profileEnd;
            }
            set {
                _profileEnd = value;
            }
        }

        public ushort ProfileHollow {
            get {
                return _profileHollow;
            }
            set {
                _profileHollow = value;
            }
        }

        public Vector3 Scale {
            get {
                return _scale;
            }
            set {
                _scale = value;
            }
        }

        public byte State {
            get {
                return _state;
            }
            set {
                _state = value;
            }
        }

        public ProfileShape ProfileShape {
            get {
                return _profileShape;
            }
            set {
                _profileShape = value;
            }
        }

        public HollowShape HollowShape {
            get {
                return _hollowShape;
            }
            set {
                _hollowShape = value;
            }
        }

        public UUID SculptTexture {
            get {
                return _sculptTexture;
            }
            set {
                _sculptTexture = value;
            }
        }

        public byte SculptType {
            get {
                return _sculptType;
            }
            set {
                _sculptType = value;
            }
        }

        public byte[] SculptData {
            get {
                return _sculptData;
            }
            set {
                _sculptData = value;
            }
        }

        public Image SculptBitmap {
            get {
                return _sculptBitmap;
            }
            set {
                _sculptBitmap = value;
            }
        }

        public int FlexiSoftness {
            get {
                return _flexiSoftness;
            }
            set {
                _flexiSoftness = value;
            }
        }

        public float FlexiTension {
            get {
                return _flexiTension;
            }
            set {
                _flexiTension = value;
            }
        }

        public float FlexiDrag {
            get {
                return _flexiDrag;
            }
            set {
                _flexiDrag = value;
            }
        }

        public float FlexiGravity {
            get {
                return _flexiGravity;
            }
            set {
                _flexiGravity = value;
            }
        }

        public float FlexiWind {
            get {
                return _flexiWind;
            }
            set {
                _flexiWind = value;
            }
        }

        public float FlexiForceX {
            get {
                return _flexiForceX;
            }
            set {
                _flexiForceX = value;
            }
        }

        public float FlexiForceY {
            get {
                return _flexiForceY;
            }
            set {
                _flexiForceY = value;
            }
        }

        public float FlexiForceZ {
            get {
                return _flexiForceZ;
            }
            set {
                _flexiForceZ = value;
            }
        }

        public float LightColorR {
            get {
                return _lightColorR;
            }
            set {
                _lightColorR = value;
            }
        }

        public float LightColorG {
            get {
                return _lightColorG;
            }
            set {
                _lightColorG = value;
            }
        }

        public float LightColorB {
            get {
                return _lightColorB;
            }
            set {
                _lightColorB = value;
            }
        }

        public float LightColorA {
            get {
                return _lightColorA;
            }
            set {
                _lightColorA = value;
            }
        }

        public float LightRadius {
            get {
                return _lightRadius;
            }
            set {
                _lightRadius = value;
            }
        }

        public float LightCutoff {
            get {
                return _lightCutoff;
            }
            set {
                _lightCutoff = value;
            }
        }

        public float LightFalloff {
            get {
                return _lightFalloff;
            }
            set {
                _lightFalloff = value;
            }
        }

        public float LightIntensity {
            get {
                return _lightIntensity;
            }
            set {
                _lightIntensity = value;
            }
        }

        public bool FlexiEntry {
            get {
                return _flexiEntry;
            }
            set {
                _flexiEntry = value;
            }
        }

        public bool LightEntry {
            get {
                return _lightEntry;
            }
            set {
                _lightEntry = value;
            }
        }

        public bool SculptEntry {
            get {
                return _sculptEntry;
            }
            set {
                _sculptEntry = value;
            }
        }

        public byte[] ExtraParamsToBytes()
        {
            ushort FlexiEP = 0x10;
            ushort LightEP = 0x20;
            ushort SculptEP = 0x30;

            int i = 0;
            uint TotalBytesLength = 1; // ExtraParamsNum

            uint ExtraParamsNum = 0;
            if (_flexiEntry)
            {
                ExtraParamsNum++;
                TotalBytesLength += 16;// data
                TotalBytesLength += 2 + 4; // type
            }
            if (_lightEntry)
            {
                ExtraParamsNum++;
                TotalBytesLength += 16;// data
                TotalBytesLength += 2 + 4; // type
            }
            if (_sculptEntry)
            {
                ExtraParamsNum++;
                TotalBytesLength += 17;// data
                TotalBytesLength += 2 + 4; // type
            }

            byte[] returnbytes = new byte[TotalBytesLength];


            // uint paramlength = ExtraParamsNum;

            // Stick in the number of parameters
            returnbytes[i++] = (byte)ExtraParamsNum;

            if (_flexiEntry)
            {
                byte[] FlexiData = GetFlexiBytes();

                returnbytes[i++] = (byte)(FlexiEP % 256);
                returnbytes[i++] = (byte)((FlexiEP >> 8) % 256);

                returnbytes[i++] = (byte)(FlexiData.Length % 256);
                returnbytes[i++] = (byte)((FlexiData.Length >> 8) % 256);
                returnbytes[i++] = (byte)((FlexiData.Length >> 16) % 256);
                returnbytes[i++] = (byte)((FlexiData.Length >> 24) % 256);
                Array.Copy(FlexiData, 0, returnbytes, i, FlexiData.Length);
                i += FlexiData.Length;
            }
            if (_lightEntry)
            {
                byte[] LightData = GetLightBytes();

                returnbytes[i++] = (byte)(LightEP % 256);
                returnbytes[i++] = (byte)((LightEP >> 8) % 256);

                returnbytes[i++] = (byte)(LightData.Length % 256);
                returnbytes[i++] = (byte)((LightData.Length >> 8) % 256);
                returnbytes[i++] = (byte)((LightData.Length >> 16) % 256);
                returnbytes[i++] = (byte)((LightData.Length >> 24) % 256);
                Array.Copy(LightData, 0, returnbytes, i, LightData.Length);
                i += LightData.Length;
            }
            if (_sculptEntry)
            {
                byte[] SculptData = GetSculptBytes();

                returnbytes[i++] = (byte)(SculptEP % 256);
                returnbytes[i++] = (byte)((SculptEP >> 8) % 256);

                returnbytes[i++] = (byte)(SculptData.Length % 256);
                returnbytes[i++] = (byte)((SculptData.Length >> 8) % 256);
                returnbytes[i++] = (byte)((SculptData.Length >> 16) % 256);
                returnbytes[i++] = (byte)((SculptData.Length >> 24) % 256);
                Array.Copy(SculptData, 0, returnbytes, i, SculptData.Length);
                i += SculptData.Length;
            }

            if (!_flexiEntry && !_lightEntry && !_sculptEntry)
            {
                byte[] returnbyte = new byte[1];
                returnbyte[0] = 0;
                return returnbyte;
            }


            return returnbytes;
            //m_log.Info("[EXTRAPARAMS]: Length = " + m_shape.ExtraParams.Length.ToString());

        }

        public void ReadInUpdateExtraParam(ushort type, bool inUse, byte[] data)
        {
            const ushort FlexiEP = 0x10;
            const ushort LightEP = 0x20;
            const ushort SculptEP = 0x30;

            switch (type)
            {
                case FlexiEP:
                    if (!inUse)
                    {
                        _flexiEntry = false;
                        return;
                    }
                    ReadFlexiData(data, 0);
                    break;

                case LightEP:
                    if (!inUse)
                    {
                        _lightEntry = false;
                        return;
                    }
                    ReadLightData(data, 0);
                    break;

                case SculptEP:
                    if (!inUse)
                    {
                        _sculptEntry = false;
                        return;
                    }
                    ReadSculptData(data, 0);
                    break;
            }
        }

        public void ReadInExtraParamsBytes(byte[] data)
        {
            if (data == null || data.Length == 1)
                return;

            const ushort FlexiEP = 0x10;
            const ushort LightEP = 0x20;
            const ushort SculptEP = 0x30;

            bool lGotFlexi = false;
            bool lGotLight = false;
            bool lGotSculpt = false;

            int i = 0;
            byte extraParamCount = 0;
            if (data.Length > 0)
            {
                extraParamCount = data[i++];
            }


            for (int k = 0; k < extraParamCount; k++)
            {
                ushort epType = Utils.BytesToUInt16(data, i);

                i += 2;
                // uint paramLength = Helpers.BytesToUIntBig(data, i);

                i += 4;
                switch (epType)
                {
                    case FlexiEP:
                        ReadFlexiData(data, i);
                        i += 16;
                        lGotFlexi = true;
                        break;

                    case LightEP:
                        ReadLightData(data, i);
                        i += 16;
                        lGotLight = true;
                        break;

                    case SculptEP:
                        ReadSculptData(data, i);
                        i += 17;
                        lGotSculpt = true;
                        break;
                }
            }

            if (!lGotFlexi)
                _flexiEntry = false;
            if (!lGotLight)
                _lightEntry = false;
            if (!lGotSculpt)
                _sculptEntry = false;

        }

        public void ReadSculptData(byte[] data, int pos)
        {
            byte[] SculptTextureUUID = new byte[16];
            UUID SculptUUID = UUID.Zero;
            byte SculptTypel = data[16+pos];

            if (data.Length+pos >= 17)
            {
                _sculptEntry = true;
                SculptTextureUUID = new byte[16];
                SculptTypel = data[16 + pos];
                Array.Copy(data, pos, SculptTextureUUID,0, 16);
                SculptUUID = new UUID(SculptTextureUUID, 0);
            }
            else
            {
                _sculptEntry = false;
                SculptUUID = UUID.Zero;
                SculptTypel = 0x00;
            }

            if (_sculptEntry)
            {
                if (_sculptType != (byte)1 && _sculptType != (byte)2 && _sculptType != (byte)3 && _sculptType != (byte)4)
                    _sculptType = 4;
            }
            _sculptTexture = SculptUUID;
            _sculptType = SculptTypel;
            //m_log.Info("[SCULPT]:" + SculptUUID.ToString());
        }

        public byte[] GetSculptBytes()
        {
            byte[] data = new byte[17];

            _sculptTexture.GetBytes().CopyTo(data, 0);
            data[16] = (byte)_sculptType;

            return data;
        }

        public void ReadFlexiData(byte[] data, int pos)
        {
            if (data.Length-pos >= 16)
            {
                _flexiEntry = true;
                _flexiSoftness = ((data[pos] & 0x80) >> 6) | ((data[pos + 1] & 0x80) >> 7);

                _flexiTension = (float)(data[pos++] & 0x7F) / 10.0f;
                _flexiDrag = (float)(data[pos++] & 0x7F) / 10.0f;
                _flexiGravity = (float)(data[pos++] / 10.0f) - 10.0f;
                _flexiWind = (float)data[pos++] / 10.0f;
                Vector3 lForce = new Vector3(data, pos);
                _flexiForceX = lForce.X;
                _flexiForceY = lForce.Y;
                _flexiForceZ = lForce.Z;
            }
            else
            {
                _flexiEntry = false;
                _flexiSoftness = 0;

                _flexiTension = 0.0f;
                _flexiDrag = 0.0f;
                _flexiGravity = 0.0f;
                _flexiWind = 0.0f;
                _flexiForceX = 0f;
                _flexiForceY = 0f;
                _flexiForceZ = 0f;
            }
        }

        public byte[] GetFlexiBytes()
        {
            byte[] data = new byte[16];
            int i = 0;

            // Softness is packed in the upper bits of tension and drag
            data[i] = (byte)((_flexiSoftness & 2) << 6);
            data[i + 1] = (byte)((_flexiSoftness & 1) << 7);

            data[i++] |= (byte)((byte)(_flexiTension * 10.01f) & 0x7F);
            data[i++] |= (byte)((byte)(_flexiDrag * 10.01f) & 0x7F);
            data[i++] = (byte)((_flexiGravity + 10.0f) * 10.01f);
            data[i++] = (byte)(_flexiWind * 10.01f);
            Vector3 lForce = new Vector3(_flexiForceX, _flexiForceY, _flexiForceZ);
            lForce.GetBytes().CopyTo(data, i);

            return data;
        }

        public void ReadLightData(byte[] data, int pos)
        {
            if (data.Length - pos >= 16)
            {
                _lightEntry = true;
                Color4 lColor = new Color4(data, pos, false);
                _lightIntensity = lColor.A;
                _lightColorA = 1f;
                _lightColorR = lColor.R;
                _lightColorG = lColor.G;
                _lightColorB = lColor.B;

                _lightRadius = Utils.BytesToFloat(data, pos + 4);
                _lightCutoff = Utils.BytesToFloat(data, pos + 8);
                _lightFalloff = Utils.BytesToFloat(data, pos + 12);
            }
            else
            {
                _lightEntry = false;
                _lightColorA = 1f;
                _lightColorR = 0f;
                _lightColorG = 0f;
                _lightColorB = 0f;
                _lightRadius = 0f;
                _lightCutoff = 0f;
                _lightFalloff = 0f;
                _lightIntensity = 0f;
            }
        }

        public byte[] GetLightBytes()
        {
            byte[] data = new byte[16];

            // Alpha channel in color is intensity
            Color4 tmpColor = new Color4(_lightColorR,_lightColorG,_lightColorB,_lightIntensity);

            tmpColor.GetBytes().CopyTo(data, 0);
            Utils.FloatToBytes(_lightRadius).CopyTo(data, 4);
            Utils.FloatToBytes(_lightCutoff).CopyTo(data, 8);
            Utils.FloatToBytes(_lightFalloff).CopyTo(data, 12);

            return data;
        }
    }
}