private void OnDrawGizmos()
{
if (!isEnabled)
{
return;
}
//Generate the random sites
List <Vector2> randomSites = new List <Vector2>();
//Generate random numbers with a seed
Random.InitState(seed);
int max = mapRadius;
int min = -mapRadius;
for (int i = 0; i < numberOfPoints; i++)
{
int randomX = Random.Range(min, max);
int randomZ = Random.Range(min, max);
randomSites.Add(new Vector2(randomX, randomZ));
}
//Points outside of the screen for voronoi which has some cells that are infinite
float bigSize = mapRadius * 5f;
//Star shape which will give a better result when a cell is infinite large
//When using other shapes, some of the infinite cells misses triangles
randomSites.Add(new Vector2(0f, bigSize));
randomSites.Add(new Vector2(0f, -bigSize));
randomSites.Add(new Vector2(bigSize, 0f));
randomSites.Add(new Vector2(-bigSize, 0f));
//Generate the voronoi diagram
var(vertices, triangles) = Delaunay.GenerateTriangulation(randomSites);
var cells = Delaunay.GenerateVoronoiCells((vertices, triangles));
//Display the voronoi diagram
LevelDataTester.DrawShapes(cells.Values.ToArray(), Vector3.zero);
if (showDelaunayDiagam)
{
LevelDataTester.DrawShapes(triangles.Values.ToArray(), Vector3.forward, true);
}
//Display the sites
Gizmos.color = Color.white;
for (int i = 0; i < randomSites.Count; i++)
{
float radius = 0.2f;
Gizmos.DrawSphere(randomSites[i], radius);
}
}
/// <summary>
/// Make a new biome map for a given level:
/// </summary>
/// <param name="seed"></param>
/// <param name="biomeTypes"></param>
protected BiomeMap(Level level, int numberOfVoronoiPoints = 250)
{
/// init randomness
seed = level.seed;
noise = new FastNoise(seed);
/// Generate the biome map using a voronoi diagram with a random set of points
//Generate the random sites
List <Vector2> randomBiomeCenters = new List <Vector2>();
int max = level.chunkBounds.x * Chunk.Diameter;
int bigSize = max * 5;
Random.InitState(seed);
for (int i = 0; i < numberOfVoronoiPoints; i++)
{
int randomX = Random.Range(0, max);
int randomZ = Random.Range(0, max);
randomBiomeCenters.Add(new Vector2(randomX, randomZ));
}
// add a star around the random points to clean them up
randomBiomeCenters.Add(new Vector2(0f, bigSize));
randomBiomeCenters.Add(new Vector2(0f, -bigSize));
randomBiomeCenters.Add(new Vector2(bigSize, 0f));
randomBiomeCenters.Add(new Vector2(-bigSize, 0f));
// generate the cells based on the centers
Dictionary <Vertex, Polygon> voronoiCells = Delaunay.GenerateVoronoiCells(
Delaunay.GenerateTriangulation(randomBiomeCenters)
);
// generate the biomes from the voronoi cells.
foreach (Polygon voronoiCell in voronoiCells.Values)
{
assignBiomeToVoronoiCell(voronoiCell);
}
}