private void BuildLookupHeightTable()
{
LookupHeightTable = new HeightmapLookupValue[256 * 256];
for (int i = 0; i < 256; i++)
{
for (int j = 0; j < 256; j++)
{
LookupHeightTable[i + (j * 256)] = new HeightmapLookupValue((ushort)(i + (j * 256)), (float)((double)i * ((double)j / 128.0d)));
}
}
Array.Sort <HeightmapLookupValue>(LookupHeightTable);
}
static LLRAWData()
{
LookupHeightTable = new HeightmapLookupValue[256 * 256];
for (int i = 0; i < 256; i++)
{
for (int j = 0; j < 256; j++)
{
LookupHeightTable[i + (j * 256)] = new HeightmapLookupValue((ushort)(i + (j * 256)), (float)((double)i * ((double)j / 128.0d)));
}
}
Array.Sort(LookupHeightTable);
}
public LLRAW()
{
LookupHeightTable = new HeightmapLookupValue[256 * 256];
for (int i = 0; i < 256; i++)
{
for (int j = 0; j < 256; j++)
{
LookupHeightTable[i + (j * 256)] = new HeightmapLookupValue(i + (j * 256), ((float)i * ((float)j / 128.0f)));
}
}
Array.Sort <HeightmapLookupValue>(LookupHeightTable);
}
/// <summary>
/// Static constructor, initializes the lookup table for exports
/// </summary>
static LLRAW()
{
LOOKUP_HEIGHT_TABLE = new HeightmapLookupValue[256 * 256];
for (int i = 0; i < 256; i++)
{
for (int j = 0; j < 256; j++)
{
LOOKUP_HEIGHT_TABLE[i + (j * 256)] = new HeightmapLookupValue(
(ushort)(i + (j * 256)), (float)((double)i * ((double)j * OO_128)));
}
}
Array.Sort <HeightmapLookupValue>(LOOKUP_HEIGHT_TABLE);
}
public void SaveStream(Stream s, ITerrainChannel map)
{
if (LookupHeightTable == null)
{
LookupHeightTable = new HeightmapLookupValue[256 * 256];
for (int i = 0; i < 256; i++)
{
for (int j = 0; j < 256; j++)
{
LookupHeightTable[i + (j * 256)] = new HeightmapLookupValue((ushort)(i + (j * 256)), (float)((double)i * ((double)j / 128.0d)));
}
}
Array.Sort <HeightmapLookupValue>(LookupHeightTable);
}
BinaryWriter binStream = new BinaryWriter(s);
// Output the calculated raw
for (int y = 0; y < map.Height; y++)
{
for (int x = 0; x < map.Width; x++)
{
double t = map[x, (map.Height - 1) - y];
//if height is less than 0, set it to 0 as
//can't save -ve values in a LLRAW file
if (t < 0d)
{
t = 0d;
}
int index = 0;
// The lookup table is pre-sorted, so we either find an exact match or
// the next closest (smaller) match with a binary search
index = Array.BinarySearch <HeightmapLookupValue>(LookupHeightTable, new HeightmapLookupValue(0, (float)t));
if (index < 0)
{
index = ~index - 1;
}
index = LookupHeightTable[index].Index;
byte red = (byte)(index & 0xFF);
byte green = (byte)((index >> 8) & 0xFF);
const byte blue = 20;
const byte alpha1 = 0;
const byte alpha2 = 0;
const byte alpha3 = 0;
const byte alpha4 = 0;
const byte alpha5 = 255;
const byte alpha6 = 255;
const byte alpha7 = 255;
const byte alpha8 = 255;
byte alpha9 = red;
byte alpha10 = green;
binStream.Write(red);
binStream.Write(green);
binStream.Write(blue);
binStream.Write(alpha1);
binStream.Write(alpha2);
binStream.Write(alpha3);
binStream.Write(alpha4);
binStream.Write(alpha5);
binStream.Write(alpha6);
binStream.Write(alpha7);
binStream.Write(alpha8);
binStream.Write(alpha9);
binStream.Write(alpha10);
}
}
binStream.Close();
}
