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)));
}
public void Update(double elapsedTime, EntityManager entityManager)
{
foreach (var entity in entityManager.GetEntitiesWithComponent <CubeMeshComponent>())
{
var mesh = entityManager.GetComponent <StaticMesh>(entity);
if (mesh == null)
{
var component = entityManager.GetComponent <CubeMeshComponent>(entity);
mesh = new StaticMesh();
mesh.ModelMatrix = component.Transform;
mesh.Color = new Vector4(0f, 0f, 1f, 1f);
mesh.Update(MeshCreator.CreateXZGrid(25, 25));
entityManager.AddComponentToEntity(entity, mesh);
}
}
}