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varregion: plug in TerrainData class and modify TerrainModule and LLClientView to use same. This passes a terrain info class around rather than passing a one dimensional array thus allowing variable regions. Update the database storage for variable region sizes. This should be downward compatible (same format for 256x256 regions).

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This commit is contained in:
Robert Adams
2013-10-02 16:59:37 -07:00
parent 25ae59b9eb
commit 7416809077
13 changed files with 281 additions and 310 deletions
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113
OpenSim/Framework/TerrainData.cs
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@@ -44,9 +44,19 @@ namespace OpenSim.Framework
// Someday terrain will have caves
public abstract float this[int x, int y, int z] { get; set; }
public bool IsTainted { get; protected set; }
public abstract bool IsTaintedAt(int xx, int yy);
public abstract void ClearTaint();
// Return a representation of this terrain for storing as a blob in the database.
// Returns 'true' to say blob was stored in the 'out' locations.
public abstract bool GetDatabaseBlob(out int DBFormatRevisionCode, out Array blob);
// return a special compressed representation of the heightmap in shorts
public abstract short[] GetCompressedMap();
public abstract void SetCompressedMap(short[] cmap);
public abstract TerrainData Clone();
}
// The terrain is stored as a blob in the database with a 'revision' field.
@@ -72,13 +82,23 @@ namespace OpenSim.Framework
// Version of terrain that is a heightmap.
// This should really be 'LLOptimizedHeightmapTerrainData' as it includes knowledge
// of 'patches' which are 16x16 terrain areas which can be sent separately to the viewer.
// The heighmap is kept as an array of short integers. The integer values are converted to
// and from floats by TerrainCompressionFactor.
public class HeightmapTerrainData : TerrainData
{
// TerrainData.this[x, y]
public override float this[int x, int y]
{
get { return m_heightmap[x * SizeX + y]; }
set { m_heightmap[x * SizeX + y] = value; }
get { return FromCompressedHeight(m_heightmap[x, y]); }
set {
short newVal = ToCompressedHeight(value);
if (m_heightmap[x, y] != newVal)
{
m_heightmap[x, y] = newVal;
m_taint[x / Constants.TerrainPatchSize, y / Constants.TerrainPatchSize] = true;
}
}
}
// TerrainData.this[x, y, z]
@@ -88,6 +108,20 @@ namespace OpenSim.Framework
set { this[x, y] = value; }
}
// TerrainData.ClearTaint
public override void ClearTaint()
{
IsTainted = false;
for (int ii = 0; ii < m_taint.GetLength(0); ii++)
for (int jj = 0; jj < m_taint.GetLength(1); jj++)
m_taint[ii, jj] = false;
}
public override bool IsTaintedAt(int xx, int yy)
{
return m_taint[xx / Constants.TerrainPatchSize, yy / Constants.TerrainPatchSize];
}
// TerrainData.GetDatabaseBlob
// The user wants something to store in the database.
public override bool GetDatabaseBlob(out int DBRevisionCode, out Array blob)
@@ -96,7 +130,53 @@ namespace OpenSim.Framework
blob = LegacyTerrainSerialization();
return false;
}
private float[] m_heightmap;
public override short[] GetCompressedMap()
{
short[] newMap = new short[SizeX * SizeY];
int ind = 0;
for (int xx = 0; xx < SizeX; xx++)
for (int yy = 0; yy < SizeY; yy++)
newMap[ind++] = m_heightmap[xx, yy];
return newMap;
}
public override void SetCompressedMap(short[] cmap)
{
int ind = 0;
for (int xx = 0; xx < SizeX; xx++)
for (int yy = 0; yy < SizeY; yy++)
m_heightmap[xx, yy] = cmap[ind++];
}
// TerrainData.Clone
public override TerrainData Clone()
{
HeightmapTerrainData ret = new HeightmapTerrainData(SizeX, SizeY, SizeZ);
ret.m_heightmap = (short[,])this.m_heightmap.Clone();
return ret;
}
// =============================================================
private short[,] m_heightmap;
// Remember subregions of the heightmap that has changed.
private bool[,] m_taint;
// 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 static short ToCompressedHeight(double pHeight)
{
return (short)(pHeight * Constants.TerrainCompression);
}
public static float FromCompressedHeight(short pHeight)
{
return ((float)pHeight) / Constants.TerrainCompression;
}
// To keep with the legacy theme, this can be created with the way terrain
// used to passed around as.
@@ -106,26 +186,37 @@ namespace OpenSim.Framework
SizeY = pTerrain.GetLength(1);
SizeZ = (int)Constants.RegionHeight;
int idx = 0;
m_heightmap = new float[SizeX * SizeY];
m_heightmap = new short[SizeX, SizeY];
for (int ii = 0; ii < SizeX; ii++)
{
for (int jj = 0; jj < SizeY; jj++)
{
m_heightmap[idx++] = (float)pTerrain[ii, jj];
m_heightmap[ii, jj] = ToCompressedHeight(pTerrain[ii, jj]);
}
}
m_taint = new bool[SizeX / Constants.TerrainPatchSize, SizeY / Constants.TerrainPatchSize];
ClearTaint();
}
public HeightmapTerrainData(float[] pHeightmap, int pX, int pY, int pZ)
// Create underlying structures but don't initialize the heightmap assuming the caller will immediately do that
public HeightmapTerrainData(int pX, int pY, int pZ)
{
m_heightmap = pHeightmap;
SizeX = pX;
SizeY = pY;
SizeZ = pZ;
m_heightmap = new short[SizeX, SizeY];
m_taint = new bool[SizeX / Constants.TerrainPatchSize, SizeY / Constants.TerrainPatchSize];
ClearTaint();
}
public HeightmapTerrainData(short[] cmap, int pX, int pY, int pZ) : this(pX, pY, pZ)
{
SetCompressedMap(cmap);
}
// Just create an array of doubles. Presumes the caller implicitly knows the size.
public Array LegacyTerrainSerialization()
{
@@ -135,12 +226,12 @@ namespace OpenSim.Framework
using (BinaryWriter bw = new BinaryWriter(str))
{
// TODO: COMPATIBILITY - Add byte-order conversions
for (int ii = 0; ii < m_heightmap.Length; ii++)
for (int ii = 0; ii < SizeX; ii++)
for (int jj = 0; jj < SizeY; jj++)
{
double height = (double)m_heightmap[ii];
double height = this[ii, jj];
if (height == 0.0)
height = double.Epsilon;
bw.Write(height);
}
}