public void ManageRecursive(PlanetChunkProperties chunk)
{
if (NeedsSplit(chunk) && chunk.LODLevel < MaxLodLevel)
{
if (chunk.isSplit)
{
bool childrenGeneratingFlag = false;
foreach (PlanetChunkProperties child in chunk.Children)
{
childrenGeneratingFlag |= child.ChunkObject.IsCalculating;
ManageRecursive(child);
}
if (!childrenGeneratingFlag)
{
HideChunk(chunk);
}
chunk.isSpliting = false;
}
else
{
AddToSplitPool(chunk);
}
}
else
{
Merge(chunk);
}
}
public void AddToSplitPool(PlanetChunkProperties chunk)
{
if (!SplitPool.Contains(chunk))
{
SplitPool.Enqueue(chunk);
}
}
public void Split(PlanetChunkProperties chunk)
{
if (chunk.ChunkObject != null)
{
if (NeedsSplit(chunk))
{
if (chunk.Children == null)
{
chunk.Children = new PlanetChunkProperties[4];
CreateChunk(chunk, chunk.min, 0);
CreateChunk(chunk, chunk.MiddleLeft, 1);
CreateChunk(chunk, chunk.BottomMiddle, 2);
CreateChunk(chunk, chunk.Middle, 3);
}
else
{
foreach (PlanetChunkProperties child in chunk.Children)
{
EnableChunk(child);
}
}
chunk.isMerged = false;
}
}
}
//Create a Chunk
public void CreateChunk(PlanetChunkProperties parent, Vector2 min, int index)
{
parent.Chunks[index] =
CreateChunkProperties(parent, parent.Rotation, parent.Size / 2f, parent.LODLevel + 1, min);
parent.Chunks[index].ChunkObject = GetFreeChunkObject(parent.Chunks[index]);
parent.Chunks[index].Bounds = parent.Chunks[index].ChunkObject.GetComponent <MeshRenderer>().bounds;
}
//Update the chunk's position
public PlanetChunkObject UpdateChunkObject(PlanetChunkProperties chunkProperties, PlanetChunkObject chunk)
{
chunk.transform.localPosition = Vector3.zero;
chunk.Properties = chunkProperties;
chunkProperties.ChunkObject = chunk;
UpdateChunkMesh(chunk);
return(chunk);
}
//Create the root planet node
public void CreateRoot(Vector3 rotationDir, float angle)
{
PlanetChunkProperties p =
CreateChunkProperties(null, Quaternion.AngleAxis(angle, rotationDir), 1f, 0, Vector2.zero);
GetFreeChunkObject(p);
rootChunks.Add(p);
}
public void EnableChunk(PlanetChunkProperties chunk)
{
if (chunk.ChunkObject == null)
{
chunk.ChunkObject = GetFreeChunkObject(chunk);
}
chunk.ChunkObject.SetVisible(true);
}
public bool NeedsSplit(PlanetChunkProperties chunk)
{
var maxVerError =
(chunk.maxGeoError / Mathf.Sqrt(chunk.ChunkObject.Renderer.bounds
.SqrDistance(MainCamera.transform
.position)) /*Vector3.Distance(Planet.MainCamera.transform.position,Center * Planet.SphereRadius)*/
) * K;
return(maxVerError > MaxError);
}
public void HideChunk(PlanetChunkProperties chunk)
{
if (chunk.ChunkObject != null)
{
if (chunk.ChunkObject.IsVisible)
{
chunk.ChunkObject.SetVisible(false);
}
}
}
public void DisableChunk(PlanetChunkProperties chunk)
{
if (chunk.ChunkObject.Collider != null)
{
chunk.ChunkObject.Collider.enabled = false;
}
HideChunk(chunk);
AddToChunkPool(chunk.ChunkObject);
chunk.ChunkObject = null;
chunk.Active = false;
}
private void Update()
{
ManageChunks();
UpdateNoise();
if (SplitPool.Count > 0 && lastSplitTime - Time.time <= 0)
{
PlanetChunkProperties c = SplitPool.Dequeue();
Split(c);
lastSplitTime = Time.time + 1f / MaxSplitsPerSecond;
}
}
/// <summary>
/// Get Free Chunk object if none exists, create
/// </summary>
public PlanetChunkObject GetFreeChunkObject(PlanetChunkProperties chunkProperties)
{
PlanetChunkObject c = GetChunkObjectFromPool();
if (c == null)
{
c = CreateBasicChunkObject();
}
UpdateChunkObject(chunkProperties, c);
return(c);
}
public void Merge(PlanetChunkProperties chunk)
{
if (!chunk.isMerged)
{
if (chunk.Children != null)
{
foreach (PlanetChunkProperties child in chunk.Children)
{
MergeChildren(chunk, child);
}
}
EnableChunk(chunk);
chunk.isMerged = true;
}
}
void MergeChildren(PlanetChunkProperties parent, PlanetChunkProperties child)
{
if (!child.isMerged)
{
if (child.Children != null)
{
foreach (PlanetChunkProperties c in child.Children)
{
//recursively merge
MergeChildren(parent, c);
}
}
}
DisableChunk(child);
parent.isMerged = true;
}
public PlanetChunkProperties CreateChunkProperties(PlanetChunkProperties parent, Quaternion rotation,
float Size, int LodLevel, Vector2 min)
{
PlanetChunkProperties chunk = new PlanetChunkProperties();
chunk.Rotation = rotation;
chunk.Parent = parent;
chunk.LODLevel = LodLevel;
chunk.Size = Size;
chunk.min = min;
chunk.Center = (chunk.Rotation * new Vector3(chunk.Middle.x - 0.5f, 1f, chunk.Middle.y - 0.5f)).normalized *
SphereRadius;
chunk.maxGeoError = Mathf.Pow(2f, MaxLodLevel - chunk.LODLevel);
return(chunk);
}
public PlanetChunkProperties GetNearestChunkProperties(Vector3 point)
{
if (rootChunks == null)
{
return(null);
}
float nearestDistance = float.PositiveInfinity;
PlanetChunkProperties nearestChunk = null;
foreach (var rootChunk in rootChunks)
{
float d = (rootChunk.Bounds.center - point).sqrMagnitude;
if (d < nearestDistance)
{
nearestDistance = d;
nearestChunk = rootChunk;
}
}
return(GetNearestChunkProperties(nearestChunk, point));
}
private PlanetChunkProperties GetNearestChunkProperties(PlanetChunkProperties parent, Vector3 point)
{
if (parent.Chunks == null)
{
return(parent);
}
float nearestDistance = float.PositiveInfinity;
PlanetChunkProperties nearestChunk = null;
foreach (var chunk in parent.Chunks)
{
float d = (chunk.Bounds.center - point).sqrMagnitude;
if (d < nearestDistance)
{
nearestChunk = chunk;
nearestDistance = d;
}
}
return(GetNearestChunkProperties(nearestChunk, point));
}
