public Vector4 SampleNoise(Vector2 xzPosition, AsyncTextureUnsafe <Color32> source, float strength, NoiseType type)
{
Vector4 normalizedNoise = RawTextureSampler.SampleBilinear(
xzPosition.x * RenderConfig.NoiseScale,
xzPosition.y * RenderConfig.NoiseScale,
source
);
if (type == NoiseType.NegativeOneToOne)
{
normalizedNoise.Set(
normalizedNoise.x * 2f - 1f,
normalizedNoise.y * 2f - 1f,
normalizedNoise.z * 2f - 1f,
normalizedNoise.w * 2f - 1f
);
}
return(normalizedNoise * strength);
}
private IEnumerator RefreshHeightmap(ChunkOrientationData chunkOrientation)
{
var terrainData = Terrain.terrainData;
var unsafeOrientationTexture = new AsyncTextureUnsafe <Color32>(chunkOrientation.OrientationTexture);
var unsafeWeightsTexture = new AsyncTextureUnsafe <Color32>(chunkOrientation.WeightsTexture);
var unsafeDuckTexture = new AsyncTextureUnsafe <Color32>(chunkOrientation.DuckTexture);
var unsafeFlatlandsNoise = new AsyncTextureUnsafe <Color32>(RenderConfig.FlatlandsElevationNoiseSource);
var unsafeHillsNoise = new AsyncTextureUnsafe <Color32>(RenderConfig.HillsElevationNoiseSource);
Vector3 terrainSize = terrainData.size;
int mapWidth = terrainData.heightmapWidth;
int mapHeight = terrainData.heightmapHeight;
float[,] heights = terrainData.GetHeights(0, 0, mapWidth, mapHeight);
float maxTextureNormalX = Width / RenderConfig.ChunkWidth;
float maxTextureNormalZ = Height / RenderConfig.ChunkHeight;
float indexToNormalX = 1f / (mapHeight - 1f);
float indexToNormalZ = 1f / (mapWidth - 1f);
Vector3 chunkPosition = transform.position;
var columnTasks = new Task[mapHeight];
for (int height = 0; height < mapHeight; height++)
{
int cachedHeight = height;
var indexBytes = new byte[2];
PointOrientationData pointOrientation = new PointOrientationData();
var columnTask = new Task(() => {
for (int width = 0; width < mapWidth; width++)
{
float terrainNormalX, terrainNormalZ, textureNormalX, textureNormalZ, worldX, worldZ;
Color32 orientationColor;
Color weightsColor, duckColor;
//For some reason, terrainData seems to index its points
//as (y, x) rather than the more traditional (x, y), so
//we need to sample our texture accordingly
terrainNormalX = cachedHeight * indexToNormalX;
terrainNormalZ = width * indexToNormalZ;
worldX = chunkPosition.x + terrainNormalX * terrainSize.x;
worldZ = chunkPosition.z + terrainNormalZ * terrainSize.z;
textureNormalX = maxTextureNormalX * terrainNormalX;
textureNormalZ = maxTextureNormalZ * terrainNormalZ;
orientationColor = ColorCorrection.ARGB_To_RGBA(RawTextureSampler.SamplePoint(textureNormalX, textureNormalZ, unsafeOrientationTexture));
weightsColor = ColorCorrection.ARGB_To_RGBA(RawTextureSampler.SamplePoint(textureNormalX, textureNormalZ, unsafeWeightsTexture));
duckColor = ColorCorrection.ARGB_To_RGBA(RawTextureSampler.SamplePoint(textureNormalX, textureNormalZ, unsafeDuckTexture));
PointOrientationLogic.GetOrientationDataFromColors(
pointOrientation, indexBytes, orientationColor, weightsColor, duckColor
);
heights[width, cachedHeight] = HeightLogic.GetHeightForPoint(
new Vector2(worldX, worldZ), pointOrientation, unsafeFlatlandsNoise, unsafeHillsNoise
);
}
});
columnTask.Start();
columnTasks[cachedHeight] = columnTask;
}
while (columnTasks.Any(task => !task.IsCompleted))
{
yield return(SkipFrame);
}
terrainData.SetHeights(0, 0, heights);
}
private IEnumerator RefreshAlphamap(ChunkOrientationData orientationData)
{
var terrainData = Terrain.terrainData;
var unsafeOrientationTexture = new AsyncTextureUnsafe <Color32>(orientationData.OrientationTexture);
var unsafeWeightsTexture = new AsyncTextureUnsafe <Color32>(orientationData.WeightsTexture);
var unsafeDuckTexture = new AsyncTextureUnsafe <Color32>(orientationData.DuckTexture);
Vector3 terrainSize = terrainData.size;
int mapWidth = terrainData.alphamapWidth;
int mapHeight = terrainData.alphamapHeight;
int alphamapLength = RenderConfig.MapTextures.Count();
float[,,] alphaMaps = terrainData.GetAlphamaps(0, 0, mapWidth, mapHeight);
float maxTextureNormalX = Width / RenderConfig.ChunkWidth;
float maxTextureNormalZ = Height / RenderConfig.ChunkHeight;
float indexToNormalX = 1f / (mapHeight - 1f);
float indexToNormalZ = 1f / (mapWidth - 1f);
Vector3 chunkPosition = transform.position;
var columnTasks = new Task[mapHeight];
for (int height = 0; height < mapHeight; height++)
{
int cachedHeight = height;
var indexBytes = new byte[2];
PointOrientationData pointOrientation = new PointOrientationData();
float[] returnMap = new float[RenderConfig.MapTextures.Count()];
float[] intermediateMap = new float[RenderConfig.MapTextures.Count()];
var columnTask = new Task(() => {
for (int width = 0; width < mapWidth; width++)
{
float terrainNormalX, terrainNormalZ, textureNormalX, textureNormalZ, worldX, worldZ;
Color32 orientationColor;
Color weightsColor, duckColor;
//For some reason, terrainData seems to index its points
//as (y, x) rather than the more traditional (x, y), so
//we need to sample our texture accordingly
terrainNormalX = cachedHeight * indexToNormalX;
terrainNormalZ = width * indexToNormalZ;
worldX = chunkPosition.x + terrainNormalX * terrainSize.x;
worldZ = chunkPosition.z + terrainNormalZ * terrainSize.z;
textureNormalX = maxTextureNormalX * terrainNormalX;
textureNormalZ = maxTextureNormalZ * terrainNormalZ;
orientationColor = ColorCorrection.ARGB_To_RGBA(RawTextureSampler.SamplePoint(textureNormalX, textureNormalZ, unsafeOrientationTexture));
weightsColor = ColorCorrection.ARGB_To_RGBA(RawTextureSampler.SamplePoint(textureNormalX, textureNormalZ, unsafeWeightsTexture));
duckColor = ColorCorrection.ARGB_To_RGBA(RawTextureSampler.SamplePoint(textureNormalX, textureNormalZ, unsafeDuckTexture));
PointOrientationLogic.GetOrientationDataFromColors(
pointOrientation, indexBytes, orientationColor, weightsColor, duckColor
);
AlphamapLogic.GetAlphamapFromOrientation(returnMap, intermediateMap, pointOrientation);
for (int alphaIndex = 0; alphaIndex < alphamapLength; alphaIndex++)
{
alphaMaps[width, cachedHeight, alphaIndex] = returnMap[alphaIndex];
}
}
});
columnTask.Start();
columnTasks[cachedHeight] = columnTask;
}
while (columnTasks.Any(task => !task.IsCompleted))
{
yield return(SkipFrame);
}
terrainData.SetAlphamaps(0, 0, alphaMaps);
}
