public static void CreateSlopes(TerrainData data, int baseSeed)
{
var plane = data.Size.Plane;
plane.Range().AsParallel().ForAll(p =>
{
int z = data.GetHeight(p);
int count = 0;
Direction dir = Direction.None;
var r = new MWCRandom(p, baseSeed);
int offset = r.Next(8);
// Count the tiles around this tile which are higher. Create slope to a random direction, but skip
// the slope if all 8 tiles are higher.
// Count to 10. If 3 successive slopes, create one in the middle
int successive = 0;
for (int i = 0; i < 10; ++i)
{
var d = DirectionExtensions.PlanarDirections[(i + offset) % 8];
var t = p + d;
if (plane.Contains(t) && data.GetHeight(t) > z)
{
if (i < 8)
count++;
successive++;
if (successive == 3)
{
dir = DirectionExtensions.PlanarDirections[((i - 1) + offset) % 8];
}
else if (dir == Direction.None)
{
dir = d;
}
}
else
{
successive = 0;
}
}
if (count > 0 && count < 8)
{
var p3d = new IntPoint3(p, z);
var td = data.GetTileData(p3d);
td.TerrainID = dir.ToSlope();
data.SetTileData(p3d, td);
}
});
}
public ushort GetHeuristic(IntVector3 p)
{
// Add a bit random so that the river doesn't go straight
var r = new MWCRandom(p, 1);
return (ushort)(p.Z * 10 + r.Next(4));
}
public static void CreateTrees(TerrainData terrain, Random random)
{
var grid = terrain.TileGrid;
var heightMap = terrain.HeightMap;
var materials = Materials.GetMaterials(MaterialCategory.Wood).ToArray();
int baseSeed = random.Next();
if (baseSeed == 0)
baseSeed = 1;
terrain.Size.Plane.Range().AsParallel().ForAll(p2d =>
{
int z = heightMap[p2d.Y, p2d.X];
var p = new IntPoint3(p2d, z);
var td = grid[p.Z, p.Y, p.X];
if (td.InteriorID == InteriorID.Grass)
{
var r = new MWCRandom(p, baseSeed);
if (r.Next(8) == 0)
{
td.InteriorID = r.Next(2) == 0 ? InteriorID.Tree : InteriorID.Sapling;
td.InteriorMaterialID = materials[r.Next(materials.Length)].ID;
grid[p.Z, p.Y, p.X] = td;
}
}
});
}
public static void CreateVegetation(TerrainData terrain, Random random, int vegetationLimit)
{
var grassMaterials = Materials.GetMaterials(MaterialCategory.Grass).ToArray();
var woodMaterials = Materials.GetMaterials(MaterialCategory.Wood).ToArray();
var berryMaterials = Materials.GetMaterials(MaterialCategory.Berry).ToArray();
int baseSeed = random.Next();
if (baseSeed == 0)
baseSeed = 1;
terrain.Size.Plane.Range().AsParallel().ForAll(p2d =>
{
int z = terrain.GetSurfaceLevel(p2d);
var p = new IntVector3(p2d, z);
if (z >= vegetationLimit)
return;
var td = terrain.GetTileData(p);
if (td.WaterLevel > 0)
return;
if (terrain.GetMaterial(p.Down).Category != MaterialCategory.Soil)
return;
var r = new MWCRandom(p, baseSeed);
int v = r.Next(100);
if (v >= 95)
{
td.ID = TileID.Sapling;
td.MaterialID = woodMaterials[r.Next(woodMaterials.Length)].ID;
}
else if (v >= 90)
{
td.ID = TileID.Tree;
td.MaterialID = woodMaterials[r.Next(woodMaterials.Length)].ID;
}
else if (v >= 80)
{
td.ID = TileID.Shrub;
td.MaterialID = berryMaterials[r.Next(berryMaterials.Length)].ID;
}
else
{
td.ID = TileID.Grass;
td.MaterialID = grassMaterials[r.Next(grassMaterials.Length)].ID;
}
terrain.SetTileDataNoHeight(p, td);
});
}