private List <string> GetLANDTextureFilePaths(LANDRecord LAND)
{
// Don't return anything if the LAND doesn't have height data or texture data.
if ((LAND.VHGT == null) || (LAND.VTEX == null))
{
return(null);
}
var textureFilePaths = new List <string>();
var distinctTextureIndices = LAND.VTEX.textureIndices.Distinct().ToList();
for (int i = 0; i < distinctTextureIndices.Count; i++)
{
short textureIndex = (short)((short)distinctTextureIndices[i] - 1);
if (textureIndex < 0)
{
textureFilePaths.Add(defaultLandTextureFilePath);
continue;
}
else
{
var LTEX = dataReader.FindLTEXRecord(textureIndex);
var textureFilePath = LTEX.DATA.value;
textureFilePaths.Add(textureFilePath);
}
}
return(textureFilePaths);
}
/// <summary>
/// Creates terrain representing a LAND record.
/// </summary>
private IEnumerator InstantiateLANDCoroutine(LANDRecord LAND, GameObject parent)
{
Debug.Assert(LAND != null);
// Don't create anything if the LAND doesn't have height data.
if (LAND.VHGT == null)
{
// End execution of the coroutine.
yield break;
}
// Return before doing any work to provide an IEnumerator handle to the coroutine.
yield return(null);
int LAND_SIDE_LENGTH_IN_SAMPLES = 65;
var heights = new float[LAND_SIDE_LENGTH_IN_SAMPLES, LAND_SIDE_LENGTH_IN_SAMPLES];
// Read in the heights in Morrowind units.
const int VHGTIncrementToMWUnits = 8;
float rowOffset = LAND.VHGT.referenceHeight;
for (int y = 0; y < LAND_SIDE_LENGTH_IN_SAMPLES; y++)
{
rowOffset += LAND.VHGT.heightOffsets[y * LAND_SIDE_LENGTH_IN_SAMPLES];
heights[y, 0] = VHGTIncrementToMWUnits * rowOffset;
float colOffset = rowOffset;
for (int x = 1; x < LAND_SIDE_LENGTH_IN_SAMPLES; x++)
{
colOffset += LAND.VHGT.heightOffsets[(y * LAND_SIDE_LENGTH_IN_SAMPLES) + x];
heights[y, x] = VHGTIncrementToMWUnits * colOffset;
}
}
// Change the heights to percentages.
float minHeight, maxHeight;
Utils.GetExtrema(heights, out minHeight, out maxHeight);
for (int y = 0; y < LAND_SIDE_LENGTH_IN_SAMPLES; y++)
{
for (int x = 0; x < LAND_SIDE_LENGTH_IN_SAMPLES; x++)
{
heights[y, x] = Utils.ChangeRange(heights[y, x], minHeight, maxHeight, 0, 1);
}
}
// Texture the terrain.
SplatPrototype[] splatPrototypes = null;
float[,,] alphaMap = null;
if (LAND.VTEX != null)
{
// Create splat prototypes.
var splatPrototypeList = new List <SplatPrototype>();
var texInd2splatInd = new Dictionary <ushort, int>();
for (int i = 0; i < LAND.VTEX.textureIndices.Length; i++)
{
short textureIndex = (short)((short)LAND.VTEX.textureIndices[i] - 1);
if (textureIndex < 0)
{
continue;
}
if (!texInd2splatInd.ContainsKey((ushort)textureIndex))
{
// Load terrain texture.
var LTEX = dataReader.FindLTEXRecord(textureIndex);
var textureFilePath = LTEX.DATA.value;
var texture = textureManager.LoadTexture(textureFilePath);
// Yield after loading each texture to avoid doing too much work on one frame.
yield return(null);
// Create the splat prototype.
var splat = new SplatPrototype();
splat.texture = texture;
splat.smoothness = 0;
splat.metallic = 0;
splat.tileSize = new Vector2(6, 6);
// Update collections.
var splatIndex = splatPrototypeList.Count;
splatPrototypeList.Add(splat);
texInd2splatInd.Add((ushort)textureIndex, splatIndex);
}
}
splatPrototypes = splatPrototypeList.ToArray();
// Create the alpha map.
int VTEX_ROWS = 16;
int VTEX_COLUMNS = VTEX_ROWS;
alphaMap = new float[VTEX_ROWS, VTEX_COLUMNS, splatPrototypes.Length];
for (int y = 0; y < VTEX_ROWS; y++)
{
var yMajor = y / 4;
var yMinor = y - (yMajor * 4);
for (int x = 0; x < VTEX_COLUMNS; x++)
{
var xMajor = x / 4;
var xMinor = x - (xMajor * 4);
var texIndex = (short)((short)LAND.VTEX.textureIndices[(yMajor * 64) + (xMajor * 16) + (yMinor * 4) + xMinor] - 1);
if (texIndex >= 0)
{
var splatIndex = texInd2splatInd[(ushort)texIndex];
alphaMap[y, x, splatIndex] = 1;
}
else
{
alphaMap[y, x, 0] = 1;
}
}
}
}
// Yield before creating the terrain GameObject because it takes a while.
yield return(null);
// Create the terrain.
var heightRange = maxHeight - minHeight;
var terrainPosition = new Vector3(Convert.exteriorCellSideLengthInMeters * LAND.gridCoords.x, minHeight / Convert.meterInMWUnits, Convert.exteriorCellSideLengthInMeters * LAND.gridCoords.y);
var heightSampleDistance = Convert.exteriorCellSideLengthInMeters / (LAND_SIDE_LENGTH_IN_SAMPLES - 1);
var terrain = GameObjectUtils.CreateTerrain(heights, heightRange / Convert.meterInMWUnits, heightSampleDistance, splatPrototypes, alphaMap, terrainPosition);
terrain.GetComponent <Terrain>().materialType = Terrain.MaterialType.BuiltInLegacyDiffuse;
terrain.transform.parent = parent.transform;
}