From 8c1d80fdfd104b94cb7a4fd247b3baa2a9988ea1 Mon Sep 17 00:00:00 2001 From: Robert Adams Date: Wed, 25 Sep 2013 17:21:20 -0700 Subject: varregion: serious rework of TerrainChannel: -- addition of varaible region size in X and Y -- internal storage of heightmap changed from double[] to short[] -- helper routines for handling internal structure while keeping existing API -- to and from XML that adds region size information (for downward compatibility, output in the legacy XML format if X and Y are 256) Updated and commented Constants.RegionSize but didn't change the name for compatibility. --- OpenSim/Region/Framework/Scenes/TerrainChannel.cs | 280 +++++++++++++++------- 1 file changed, 189 insertions(+), 91 deletions(-) (limited to 'OpenSim/Region/Framework/Scenes/TerrainChannel.cs') diff --git a/OpenSim/Region/Framework/Scenes/TerrainChannel.cs b/OpenSim/Region/Framework/Scenes/TerrainChannel.cs index c0ca48e..fef93bf 100644 --- a/OpenSim/Region/Framework/Scenes/TerrainChannel.cs +++ b/OpenSim/Region/Framework/Scenes/TerrainChannel.cs @@ -40,132 +40,125 @@ namespace OpenSim.Region.Framework.Scenes /// public class TerrainChannel : ITerrainChannel { - private readonly bool[,] taint; - private double[,] map; + protected bool[,] m_taint; + protected short[] m_map; + public int Width { get; private set; } // X dimension + // Unfortunately, for historical reasons, in this module 'Width' is X and 'Height' is Y + public int Height { get; private set; } // Y dimension + public int Altitude { get; private set; } // Y dimension + + // Default, not-often-used builder public TerrainChannel() { - map = new double[Constants.RegionSize, Constants.RegionSize]; - taint = new bool[Constants.RegionSize / 16, Constants.RegionSize / 16]; - - PinHeadIsland(); + InitializeStructures(Constants.RegionSize, Constants.RegionSize, Constants.RegionHeight, false); + FlatLand(); + // PinHeadIsland(); } - public TerrainChannel(String type) + // Create terrain of given size + public TerrainChannel(int pX, int pY) { - map = new double[Constants.RegionSize, Constants.RegionSize]; - taint = new bool[Constants.RegionSize / 16, Constants.RegionSize / 16]; + InitializeStructures((uint)pX, (uint)pY, Constants.RegionHeight, true); + } + // Create terrain of specified size and initialize with specified terrain. + // TODO: join this with the terrain initializers. + public TerrainChannel(String type, uint pX, uint pY, uint pZ) + { + InitializeStructures(pX, pY, pZ, false); if (type.Equals("flat")) FlatLand(); else PinHeadIsland(); } - public TerrainChannel(double[,] import) - { - map = import; - taint = new bool[import.GetLength(0),import.GetLength(1)]; - } - - public TerrainChannel(bool createMap) - { - if (createMap) - { - map = new double[Constants.RegionSize,Constants.RegionSize]; - taint = new bool[Constants.RegionSize / 16,Constants.RegionSize / 16]; - } - } - - public TerrainChannel(int w, int h) + public TerrainChannel(double[,] pM, uint pH) { - map = new double[w,h]; - taint = new bool[w / 16,h / 16]; + InitializeStructures((uint)pM.GetLength(0), (uint)pM.GetLength(1), pH, false); + int idx = 0; + for (int ii = 0; ii < Height; ii++) + for (int jj = 0; jj < Width; jj++) + m_map[idx++] = ToCompressedHeight(pM[ii, jj]); } #region ITerrainChannel Members - public int Width + // ITerrainChannel.MakeCopy() + public ITerrainChannel MakeCopy() { - get { return map.GetLength(0); } + return this.Copy(); } - public int Height + // ITerrainChannel.GetCompressedMap() + public short[] GetCompressedMap() { - get { return map.GetLength(1); } + return m_map; } - public ITerrainChannel MakeCopy() + // ITerrainChannel.GetFloatsSerialized() + public float[] GetFloatsSerialised() { - TerrainChannel copy = new TerrainChannel(false); - copy.map = (double[,]) map.Clone(); + int points = Width * Height; + float[] heights = new float[points]; - return copy; + for (int ii = 0; ii < points; ii++) + heights[ii] = FromCompressedHeight(m_map[ii]); + + return heights; } - public float[] GetFloatsSerialised() + // ITerrainChannel.GetDoubles() + public double[,] GetDoubles() { - // Move the member variables into local variables, calling - // member variables 256*256 times gets expensive int w = Width; - int h = Height; - float[] heights = new float[w * h]; + int l = Height; + double[,] heights = new double[w, l]; - int i, j; // map coordinates int idx = 0; // index into serialized array - for (i = 0; i < h; i++) + for (int ii = 0; ii < l; ii++) { - for (j = 0; j < w; j++) + for (int jj = 0; jj < w; jj++) { - heights[idx++] = (float)map[j, i]; + heights[ii, jj] = (double)FromCompressedHeight(m_map[idx]); + idx++; } } return heights; } - public double[,] GetDoubles() - { - return map; - } - + // ITerrainChannel.this[x,y] public double this[int x, int y] { - get { return map[x, y]; } + get { return m_map[x * Width + y]; } set { // Will "fix" terrain hole problems. Although not fantastically. if (Double.IsNaN(value) || Double.IsInfinity(value)) return; - if (map[x, y] != value) + int idx = x * Width + y; + if (m_map[idx] != value) { - taint[x / 16, y / 16] = true; - map[x, y] = value; + m_taint[x / Constants.TerrainPatchSize, y / Constants.TerrainPatchSize] = true; + m_map[idx] = ToCompressedHeight(value); } } } + // ITerrainChannel.Tainted() public bool Tainted(int x, int y) { - if (taint[x / 16, y / 16]) + if (m_taint[x / Constants.TerrainPatchSize, y / Constants.TerrainPatchSize]) { - taint[x / 16, y / 16] = false; + m_taint[x / Constants.TerrainPatchSize, y / Constants.TerrainPatchSize] = false; return true; } return false; } - #endregion - - public TerrainChannel Copy() - { - TerrainChannel copy = new TerrainChannel(false); - copy.map = (double[,]) map.Clone(); - - return copy; - } - + // ITerrainChannel.SaveToXmlString() public string SaveToXmlString() { XmlWriterSettings settings = new XmlWriterSettings(); @@ -181,13 +174,7 @@ namespace OpenSim.Region.Framework.Scenes } } - private void WriteXml(XmlWriter writer) - { - writer.WriteStartElement(String.Empty, "TerrainMap", String.Empty); - ToXml(writer); - writer.WriteEndElement(); - } - + // ITerrainChannel.LoadFromXmlString() public void LoadFromXmlString(string data) { StringReader sr = new StringReader(data); @@ -199,12 +186,89 @@ namespace OpenSim.Region.Framework.Scenes sr.Close(); } + #endregion + + private void InitializeStructures(uint pX, uint pY, uint pZ, bool shouldInitializeHeightmap) + { + Width = (int)pX; + Height = (int)pY; + Altitude = (int)pZ; + m_map = new short[Width * Height]; + m_taint = new bool[Width / Constants.TerrainPatchSize, Height / Constants.TerrainPatchSize]; + ClearTaint(); + if (shouldInitializeHeightmap) + { + FlatLand(); + } + } + + public void ClearTaint() + { + for (int ii = 0; ii < Width / Constants.TerrainPatchSize; ii++) + for (int jj = 0; jj < Height / Constants.TerrainPatchSize; jj++) + m_taint[ii, jj] = false; + } + + // To save space (especially for large regions), keep the height as a short integer + // that is coded as the float height times the compression factor (usually '100' + // to make for two decimal points). + public short ToCompressedHeight(double pHeight) + { + return (short)(pHeight * Constants.TerrainCompression); + } + + public float FromCompressedHeight(short pHeight) + { + return ((float)pHeight) / Constants.TerrainCompression; + } + + public TerrainChannel Copy() + { + TerrainChannel copy = new TerrainChannel(); + copy.m_map = (short[])m_map.Clone(); + copy.m_taint = (bool[,])m_taint.Clone(); + copy.Width = Width; + copy.Height = Height; + copy.Altitude = Altitude; + + return copy; + } + + private void WriteXml(XmlWriter writer) + { + if (Width == Constants.RegionSize && Height == Constants.RegionSize) + { + // Downward compatibility for legacy region terrain maps. + // If region is exactly legacy size, return the old format XML. + writer.WriteStartElement(String.Empty, "TerrainMap", String.Empty); + ToXml(writer); + writer.WriteEndElement(); + } + else + { + // New format XML that includes width and length. + writer.WriteStartElement(String.Empty, "TerrainMap2", String.Empty); + ToXml2(writer); + writer.WriteEndElement(); + } + } + private void ReadXml(XmlReader reader) { - reader.ReadStartElement("TerrainMap"); - FromXml(reader); + // Check the first element. If legacy element, use the legacy reader. + if (reader.IsStartElement("TerrainMap")) + { + reader.ReadStartElement("TerrainMap"); + FromXml(reader); + } + else + { + reader.ReadStartElement("TerrainMap2"); + FromXml2(reader); + } } + // Write legacy terrain map. Presumed to be 256x256 of data encoded as floats in a byte array. private void ToXml(XmlWriter xmlWriter) { float[] mapData = GetFloatsSerialised(); @@ -218,6 +282,7 @@ namespace OpenSim.Region.Framework.Scenes serializer.Serialize(xmlWriter, buffer); } + // Read legacy terrain map. Presumed to be 256x256 of data encoded as floats in a byte array. private void FromXml(XmlReader xmlReader) { XmlSerializer serializer = new XmlSerializer(typeof(byte[])); @@ -236,35 +301,68 @@ namespace OpenSim.Region.Framework.Scenes } } + private class TerrainChannelXMLPackage + { + public int Version; + public int SizeX; + public int SizeY; + public int SizeZ; + public short[] Map; + public TerrainChannelXMLPackage(int pX, int pY, int pZ, short[] pMap) + { + Version = 1; + SizeX = pX; + SizeY = pY; + SizeZ = pZ; + Map = pMap; + } + } + + // New terrain serialization format that includes the width and length. + private void ToXml2(XmlWriter xmlWriter) + { + TerrainChannelXMLPackage package = new TerrainChannelXMLPackage(Width, Height, Altitude, m_map); + XmlSerializer serializer = new XmlSerializer(typeof(TerrainChannelXMLPackage)); + serializer.Serialize(xmlWriter, package); + } + + // New terrain serialization format that includes the width and length. + private void FromXml2(XmlReader xmlReader) + { + XmlSerializer serializer = new XmlSerializer(typeof(TerrainChannelXMLPackage)); + TerrainChannelXMLPackage package = (TerrainChannelXMLPackage)serializer.Deserialize(xmlReader); + Width = package.SizeX; + Height = package.SizeY; + Altitude = package.SizeZ; + m_map = package.Map; + } + + // Fill the heightmap with the center bump terrain private void PinHeadIsland() { int x; - for (x = 0; x < Constants.RegionSize; x++) + for (x = 0; x < Width; x++) { int y; - for (y = 0; y < Constants.RegionSize; y++) + for (y = 0; y < Height; y++) { - map[x, y] = TerrainUtil.PerlinNoise2D(x, y, 2, 0.125) * 10; - double spherFacA = TerrainUtil.SphericalFactor(x, y, Constants.RegionSize / 2.0, Constants.RegionSize / 2.0, 50) * 0.01; - double spherFacB = TerrainUtil.SphericalFactor(x, y, Constants.RegionSize / 2.0, Constants.RegionSize / 2.0, 100) * 0.001; - if (map[x, y] < spherFacA) - map[x, y] = spherFacA; - if (map[x, y] < spherFacB) - map[x, y] = spherFacB; + int idx = x * (int)Width + y; + m_map[idx] = ToCompressedHeight(TerrainUtil.PerlinNoise2D(x, y, 2, 0.125) * 10); + short spherFacA = ToCompressedHeight(TerrainUtil.SphericalFactor(x, y, Constants.RegionSize / 2.0, Constants.RegionSize / 2.0, 50) * 0.01); + short spherFacB = ToCompressedHeight(TerrainUtil.SphericalFactor(x, y, Constants.RegionSize / 2.0, Constants.RegionSize / 2.0, 100) * 0.001); + if (m_map[idx] < spherFacA) + m_map[idx] = spherFacA; + if (m_map[idx] < spherFacB) + m_map[idx] = spherFacB; } } } private void FlatLand() { - int x; - for (x = 0; x < Constants.RegionSize; x++) - { - int y; - for (y = 0; y < Constants.RegionSize; y++) - map[x, y] = 21; - } + short flatHeight = ToCompressedHeight(21); + for (int ii = 0; ii < m_map.Length; ii++) + m_map[ii] = flatHeight; } - } } -- cgit v1.1