/// <summary>
/// Creates splatmaps which are (by default) applied to terrain splat shaders.
/// </summary>
/// <param name="applySplats">When true, the generated splat is automatically applied to the terrain.
/// Otherwise, it can be applied by calling ApplySplatmapsToShader</param>
/// <param name="debug">When true, the generated alpha maps are saved to the disk.
/// They're located at [Your project's root dir]/SplatImages/</param>
/// <returns>Created alphamap textures</returns>
public List <Texture2D> GenerateSplatmaps(bool applySplats = true)
{
//Ensure correct shader is set
SetFirstPassShader(true);
//Set amount of required maps
List <Texture2D> maps = new List <Texture2D>();
for (int i = 0; i < Mathf.CeilToInt(SplatSettings.Count / 4f); i++)
{
maps.Add(new Texture2D(AlphaMapResolution, AlphaMapResolution));
}
//Sample weights and fill in textures
for (int x = 0; x < AlphaMapResolution; x++)
{
for (int y = 0; y < AlphaMapResolution; y++)
{
MeshSampler.MeshSample sample = Sampler.SampleAt(y / (float)AlphaMapResolution, x / (float)AlphaMapResolution);
AddWeightsToTextures(CalculateWeights(sample), ref maps, y, x);
}
}
if (TerraDebug.WRITE_SPLAT_TEXTURES)
{
TerrainTile tile = TerrainObject.GetComponent <TerrainTile>();
string tileName = tile != null ?
"Tile[" + tile.Position.x + "_" + tile.Position.y + "]" :
"Tile[0_0]";
string folderPath = Application.dataPath + "/SplatImages/";
if (!Directory.Exists(folderPath))
{
Directory.CreateDirectory(folderPath);
}
for (var i = 0; i < maps.Count; i++)
{
byte[] bytes = maps[i].EncodeToPNG();
string name = "Splat" + i + "_" + tileName + ".png";
File.WriteAllBytes(folderPath + name, bytes);
}
}
//Apply set pixel values to textures
maps.ForEach(t => t.Apply());
if (applySplats)
{
ApplySplatmapsToShaders(maps);
}
return(maps);
}
/// <summary>
/// First creates a poisson grid based on the passed density.
/// Positions are then filtered based on the passed object placement
/// type taking into account height and angle constraints.
///
/// Unlike the <c>GetFilteredGrid(ObjectPlacementType, float)</c> method
/// this method samples from the passed Mesh rather than pulling
/// mesh information from TerraSettings.
/// </summary>
/// <param name="m">Mesh to sample height and angle values from</param>
/// <param name="type">object placement type to sample</param>
/// <returns>List of vectors within the grid and sample constraints</returns>
public List <Vector3> GetFilteredGrid(Mesh m, ObjectPlacementType type)
{
MeshSampler sampler = new MeshSampler(m, Settings.MeshResolution);
List <Vector2> grid = GetPoissonGrid(type.Spread / 10);
List <Vector3> toAdd = new List <Vector3>();
foreach (Vector2 pos in grid)
{
MeshSampler.MeshSample sample = sampler.SampleAt(pos.x, pos.y);
if (type.ShouldPlaceAt(sample.Height, sample.Angle))
{
Vector3 newPos = new Vector3(pos.x, sample.Height, pos.y);
toAdd.Add(newPos);
}
}
return(toAdd);
}
/// <summary>
/// First creates a poisson grid based on the passed density.
/// Positions are then filtered based on the passed object placement
/// type taking into account height and angle constraints.
///
/// Unlike the <c>GetFilteredGrid(ObjectPlacementType, float)</c> method
/// this method samples from the passed Mesh rather than pulling
/// mesh information from TerraSettings.
/// </summary>
/// <param name="m">Mesh to sample height and angle values from</param>
/// <param name="objectPlacementData">object placement type to sample</param>
/// <returns>List of vectors within the grid and sample constraints</returns>
public List <Vector3> GetFilteredGrid(Mesh m, ObjectPlacementData objectPlacementData)
{
MeshSampler sampler = /**new MeshSampler(m, Settings.Generator.MeshResolution);*/ new MeshSampler(m, 128); //TODO Resolution from TerraSettings
List <Vector2> grid = GetPoissonGrid(objectPlacementData.Spread / 10);
List <Vector3> toAdd = new List <Vector3>();
foreach (Vector2 pos in grid)
{
MeshSampler.MeshSample sample = sampler.SampleAt(pos.x, pos.y);
if (objectPlacementData.ShouldPlaceAt(sample.Height, sample.Angle))
{
Vector3 newPos = new Vector3(pos.x, sample.Height, pos.y);
toAdd.Add(newPos);
}
}
return(toAdd);
}
