/*
* Procedural fBm evaluated at "point"; returns value stored in "value".
*
* Copyright 1994 F. Kenton Musgrave
*
* Parameters:
* ``H'' is the fractal increment parameter
* ``lacunarity'' is the gap between successive frequencies
* ``octaves'' is the number of frequencies in the fBm
*/
private double Noise3(Vector point)
{
var improvedPerlinNoise = new ImprovedPerlinNoise(4711);
return improvedPerlinNoise.Noise(point.X, point.Y, point.Z);
}
public ScaledNoiseGenerator()
{
_largeScaleNoise = new ImprovedPerlinNoise(4711);
_noise = new NoiseFactory.RidgedMultiFractal().Create(new NoiseFactory.NoiseParameters());
}
private Node CreateNode(Box3D bounds, int level, EntityManager entityManager)
{
var mesh = MeshCreator.CreateXZGrid(10, 10);
var staticMesh = new StaticMesh
{
Color = new Vector4(0f, 0f, 1f, 1f),
ModelMatrix = Matrix4.Identity,
};
var size = bounds.Max - bounds.Min;
var mesh3V3N = mesh.Transformed(Matrix4.CreateScale((float)size.X, 1, (float)size.Z) * Matrix4.CreateTranslation((Vector3)bounds.Center));
var improvedPerlinNoise = new ImprovedPerlinNoise(4711);
for (int i = 0; i < mesh3V3N.Vertices.Length; i++)
{
var vertex = mesh3V3N.Vertices[i];
var height = improvedPerlinNoise.Noise(vertex.Position.X, vertex.Position.Z) * 0.2;
mesh3V3N.Vertices[i] = new Vertex3V3N
{
Normal = new Vector3(0, 1, 0),
Position = new Vector3(vertex.Position.X, (float)height, vertex.Position.Z)
};
}
staticMesh.Update(mesh3V3N);
var entity = new Entity(Guid.NewGuid().ToString());
entityManager.Add(entity);
entityManager.AddComponentToEntity(entity, staticMesh);
if (level == 0)
{
return new Node(bounds, new Node[] { }, entity, 1);
}
var min = bounds.Min;
var max = bounds.Max;
var center = bounds.Center;
return new Node(bounds,
new[]
{
CreateNode(new Box3D(bounds.Min, center), level -1, entityManager),
CreateNode(new Box3D(new Vector3d(center.X, 0, min.Z), new Vector3d(max.X, 0, center.Z)), level -1, entityManager),
CreateNode(new Box3D(new Vector3d(min.X, 0, center.Z), new Vector3d(center.X, 0, max.Z)), level - 1, entityManager),
CreateNode(new Box3D(center, max), level - 1, entityManager)
}, entity, Math.Pow(2, level));
}
