public TerrainChunk(TerrainChunkSettings settings, INoiseProvider noiseProvider, float seed, List <IFeatureGenerator> featureGenerator, Material material)
{
this.settings = settings;
this.noiseProvider = noiseProvider;
this.seed = seed;
this.featureGenerator = featureGenerator;
this.material = material;
cube = (GameObject)Resources.Load("Cube", typeof(GameObject));
}
private void Awake()
{
settings = new TerrainChunkSettings(129, 200, 0.1f);
noiseProvider1 = new SeussNoise0(true);
noiseProvider2 = new SeussNoise0(false);
featureGenerator = new List <IFeatureGenerator>();
seed = Random.Range(0.0f, 100000.0f);
featureGenerator.Add(new TreePlacer(settings.length));
CreateTerrainChunk();
}
public void GenerateWorldMap()
{
//float[,] islandmask = TerrainUtils.GetIslandMask(MAP_SIZE);
this.InitWorldmapData();
//worldperlin generates the overall worldmap for sampling heights from for biomes
float SCALE = 20.0f; //scaling the perlin to be larger (low res)
float moisutreOffset = UnityEngine.Random.Range(-10000, 10000);
for (int x = 0; x < MAP_SIZE; x++)
{
for (int z = 0; z < MAP_SIZE; z++)
{
float biomeX = x / SCALE;
float biomeZ = z / SCALE;
float moistX = biomeX + moisutreOffset;
float moistZ = biomeZ + moisutreOffset;
INoiseProvider provider = WorldMapProvider as INoiseProvider;
ElevationData[x, z] = ((float)(provider.GetValue(biomeX, biomeZ)) + 2f / 0.5f);// * islandmask[x,z];
//track the max and min values for normalisation later
if (ElevationData[x, z] > this.ElevationMaxValue)
{
ElevationMaxValue = ElevationData[x, z];
}
if (ElevationData[x, z] < this.ElevationMinValue)
{
ElevationMinValue = ElevationData[x, z];
}
MoistureData[x, z] = (float)(provider.GetValue(moistX, moistZ)) + 2f / 0.5f;
if (MoistureData[x, z] > this.MoisutreMaxValue)
{
MoisutreMaxValue = MoistureData[x, z];
}
if (MoistureData[x, z] < this.MoisutreMinValue)
{
MoisutreMinValue = MoistureData[x, z];
}
}
}
//set the random chunks to put features in <STATIC FOR DEV>
//ChunkFeatures.Add(new Vector2i(0, 0), FeatureType.DungeonEntrance);
//ChunkFeatures.Add(new Vector2i(-1, -1), FeatureType.DungeonEntrance);
//ChunkFeatures.Add(new Vector2i(5, 5), FeatureType.DungeonEntrance);
PlaceDungeonsInWorld();
this.IsGenerated = true;
Debug.Log("World Map is Generated");
}
// Use this for initialization
public void Generate(float seed, INoiseProvider noiseProvider, TerrainChunkSettings settings)
{
trees = new GameObject("Trees");
for (float i = -length / 2; i < length / 2; i += spacing)
{
for (float j = -length / 2; j < length / 2; j += spacing)
{
if (Random.value > noiseThreshold)
{
// calculate tree position
float xOffset = Random.Range(0, maxDiplacement);
float zOffset = Random.Range(0, maxDiplacement);
float xPosition = i + xOffset;
float zPosition = j + zOffset;
if (noiseProvider.GetValue(xPosition, zPosition, seed) < 0.2f)
{
continue;
}
// find y position by choosing lowest point from 4 nearest heightmap points
float radius = 0.45f;
float minHeight = noiseProvider.GetValue(xPosition - radius, zPosition - radius, seed);
float compareHeight = noiseProvider.GetValue(xPosition - radius, zPosition + radius, seed);
if (compareHeight < minHeight)
{
minHeight = compareHeight;
}
compareHeight = noiseProvider.GetValue(xPosition + radius, zPosition - radius, seed);
if (compareHeight < minHeight)
{
minHeight = compareHeight;
}
compareHeight = noiseProvider.GetValue(xPosition + radius, zPosition + radius, seed);
if (compareHeight < minHeight)
{
minHeight = compareHeight;
}
// create and place tree
Vector3 treePosition = new Vector3(xPosition, minHeight, zPosition);
MonoBehaviour.Instantiate(tree, treePosition, Quaternion.identity, trees.transform);
}
}
}
}
public FractionalBrownianMotionFunction(INoiseProvider provider, Random rng, double scale, int octaves, double persistence = 0.5, double lacunarity = 2.0, Func<double, double> octaveModifier = null, double? xPeriod = null, double? yPeriod = null, SampleMode mode = SampleMode.Sample2D)
{
_octaveModifier = octaveModifier;
_octaves = new Tuple<double, IFunction2D>[octaves];
bool tiling = xPeriod != null || yPeriod != null;
if (tiling && xPeriod == null)
{
xPeriod = yPeriod;
}
if (tiling && yPeriod == null)
{
yPeriod = xPeriod;
}
_maxAmplitude = 0.0;
var amplitude = 1.0;
var frequency = scale;
for (var i = 0; i < octaves; i++)
{
IFunction2D noise;
switch (mode)
{
case SampleMode.Sample2D:
noise = provider.Create2D(rng, frequency);
break;
case SampleMode.Slice3D:
noise = provider.Slice3D(rng, frequency);
break;
case SampleMode.Slice4D:
noise = provider.Slice4D(rng, frequency);
break;
case SampleMode.Tileable2D:
noise = provider.Create2D(rng, frequency, xPeriod.Value, yPeriod.Value);
break;
default:
throw new InvalidOperationException();
}
_octaves[i] = Tuple.Create(amplitude, noise);
_maxAmplitude += amplitude;
amplitude *= persistence;
frequency *= lacunarity;
}
}
private void GenerateImage(INoiseProvider provider, PictureBox pictureBox, TextBox diagnosticInfo, Button saveButton)
{
var rng = new Random();
Bitmap bitmap;
try
{
var function = CreateNoiseFunction(provider, rng);
var heightMap = new double[_size, _size];
var watch = new Stopwatch();
watch.Start();
function.FillHeightMap(heightMap);
watch.Stop();
var seconds = watch.Elapsed.TotalSeconds;
var perPoint = (int)Math.Floor((seconds / (_octaves * _size * _size)) * 1e9);
var min = Double.MaxValue;
var max = Double.MinValue;
var total = 0.0;
for (var x = 0; x < _size; x++)
{
for (var y = 0; y < _size; y++)
{
var value = heightMap[x, y];
total += value;
min = Math.Min(value, min);
max = Math.Max(value, max);
}
}
var average = total / (_size * _size);
var diagnostic = String.Format("Range: {0:f4} -> {1:f4} Avg: {2:f4}\r\n Time: {3:f4}s Per Point: {4}ns", min, max, average, seconds, perPoint);
if (_normalize)
{
var change = max - min;
var offset = min + 1.0;
for (var x = 0; x < _size; x++)
{
for (var y = 0; y < _size; y++)
{
var value = heightMap[x, y];
var magnitude = (value + 1.0 - offset) / change;
heightMap[x, y] = magnitude * 2.0 - 1.0;
}
}
}
bitmap = heightMap.RenderBitmap();
Action setBitmap = () => { pictureBox.Image = bitmap; saveButton.Enabled = true; saveButton.Tag = bitmap; };
Invoke(setBitmap);
Action setText = () => { diagnosticInfo.Text = diagnostic; };
Invoke(setText);
}
catch
{
Action setText = () => { diagnosticInfo.Text = "Error generating image!"; };
Invoke(setText);
}
}
private IFunction2D CreateNoiseFunction(INoiseProvider provider, Random rng)
{
if (_octaves == 1 && _power == 1.0 && !_absoluteValue)
{
// Simple case that doesn't need fBm, so we can just return a basic noise function
// to remove some overhead for benchmarking.
switch (_mode)
{
case SampleMode.Sample2D:
return provider.Create2D(rng, _scale);
case SampleMode.Slice3D:
return provider.Slice3D(rng, _scale);
case SampleMode.Slice4D:
return provider.Slice4D(rng, _scale);
case SampleMode.Tileable2D:
return provider.Create2D(rng, _scale, _size, _size);
default:
throw new InvalidOperationException();
}
}
Func<double, double> modifier = null;
if (_absoluteValue)
{
if (_power == 1.0)
{
modifier = input => (1.0 - Math.Abs(input)) * 2.0 - 1.0;
}
else
{
modifier = input => Math.Pow(1.0 - Math.Abs(input), _power) * 2.0 - 1.0;
}
}
else if (_power != 1.0)
{
modifier = input => input < 0 ? -Math.Pow(-input, _power) : Math.Pow(input, _power);
}
return provider.FractionalBrownianMotion(rng, _scale, _octaves, _persistence, _lacunarity, modifier, _size, _size, _mode);
}
public ChunkGenerator(INoiseProvider noiseProvider) => this.noiseProvider = noiseProvider;
/// <summary>
/// Creates a new instance of the <see cref="LsbStorageProvider" /> class.
/// </summary>
/// <param name="noiseProvider">The noise provider used to disguise the end of the data in an image.</param>
public LsbStorageProvider(INoiseProvider noiseProvider)
{
NoiseProvider = noiseProvider;
}
/// <summary>
/// Creates a new instance of the <see cref="LsbStorageProvider" /> class.
/// </summary>
public LsbStorageProvider()
{
NoiseProvider = new RandomNoiseProvider();
}