public override void Apply(TilemapStructure tilemap)
{
_random = new System.Random(tilemap.Grid.Seed);
// Re-create the heightmap from our tilemap
var heightmap = Noise.GenerateNoiseMap(tilemap.Width, tilemap.Height, tilemap.Grid.Seed, GroundHeightmap.NoiseScale, GroundHeightmap.Octaves, GroundHeightmap.Persistance, GroundHeightmap.Lacunarity, GroundHeightmap.Offset);
if (GroundHeightmap.ApplyIslandGradient)
{
var islandGradient = Noise.GenerateIslandGradientMap(tilemap.Width, tilemap.Height);
for (int x = 0, y; x < tilemap.Width; x++)
{
for (y = 0; y < tilemap.Height; y++)
{
// Subtract the islandGradient value from the noiseMap value
float subtractedValue = heightmap[y * tilemap.Width + x] - islandGradient[y * tilemap.Width + x];
// Apply it into the map, but make sure we clamp it between 0f and 1f
heightmap[y * tilemap.Width + x] = Mathf.Clamp01(subtractedValue);
}
}
}
// Get all start positions
var validStartPositions = TilemapHelper.GetTilesByType(tilemap, StartingTileTypes.Select(a => (int)a));
var amountOfRivers = _random.Next(MinRiverQuota, MaxRiverQuota + 1);
var rivers = new List <DownstreamRiver>();
for (int i = 0; i < amountOfRivers; i++)
{
// Get valid startPoint with respect to distance between existing rivers
var startPoint = GetValidStartPosition(validStartPositions, rivers);
if (!startPoint.HasValue)
{
break;
}
// Build river from start based on heightmap
var river = new DownstreamRiver(startPoint.Value);
if (river.Build(tilemap, heightmap))
{
rivers.Add(river);
}
}
// Set river tiles into tilemap
int riverTileId = (int)GroundTileType.River;
foreach (var riverPosition in rivers.SelectMany(a => a.RiverPositions))
{
tilemap.SetTile(riverPosition.x, riverPosition.y, riverTileId);
}
}
public override void Apply(TilemapStructure tilemap)
{
_random = new System.Random(tilemap.Grid.Seed);
var rivers = new List <DrunkenRiver>();
var validStartPositions = TilemapHelper.GetTilesByType(tilemap, StartingTileTypes.Select(a => (int)a));
var amountOfRivers = _random.Next(MinRiverQuota, MaxRiverQuota + 1);
for (int i = 0; i < amountOfRivers; i++)
{
// Get valid startPoint with respect to distance between existing rivers
var startPoint = GetValidStartPosition(validStartPositions, rivers);
if (!startPoint.HasValue)
{
break;
}
// Find valid endPos (closest deep water tile to startPos)
var endPos = TilemapHelper.FindClosestTileByType(tilemap, startPoint.Value, (int)GroundTileType.DeepWater);
if (!endPos.HasValue)
{
break;
}
// Build river from start to end position
var river = new DrunkenRiver(_random, RiverDriftChance, startPoint.Value, endPos.Value);
if (river.Build())
{
rivers.Add(river);
}
}
// Set river tiles into tilemap
int riverTileId = (int)GroundTileType.River;
foreach (var riverPosition in rivers.SelectMany(a => a.RiverPositions))
{
tilemap.SetTile(riverPosition.x, riverPosition.y, riverTileId);
}
}