public static GameObject CreateOctreeNode(uint nodeHandle, GameObject parentGameObject)
{
// Get node position from Cubiquity
CuOctreeNode cuOctreeNode = CubiquityDLL.GetOctreeNode(nodeHandle);
int xPos = cuOctreeNode.posX, yPos = cuOctreeNode.posY, zPos = cuOctreeNode.posZ;
// Build a corresponding game object
StringBuilder name = new StringBuilder("OctreeNode (" + xPos + ", " + yPos + ", " + zPos + ")");
GameObject newGameObject = new GameObject(name.ToString());
newGameObject.hideFlags = HideFlags.HideInHierarchy;
// Use parent properties as appropriate
newGameObject.transform.parent = parentGameObject.transform;
newGameObject.layer = parentGameObject.layer;
// It seems that setting the parent does not cause the object to move as Unity adjusts
// the child transform to compensate (this can be seen when moving objects between parents
// in the hierarchy view). Reset the local transform as shown here: http://goo.gl/k5n7M7
newGameObject.transform.localRotation = Quaternion.identity;
newGameObject.transform.localPosition = Vector3.zero;
newGameObject.transform.localScale = Vector3.one;
// Attach an OctreeNode component
OctreeNode octreeNode = newGameObject.AddComponent <OctreeNode>();
octreeNode.lowerCorner = new Vector3(xPos, yPos, zPos);
// Does the parent game object have an octree node attached?
OctreeNode parentOctreeNode = parentGameObject.GetComponent <OctreeNode>();
if (parentOctreeNode)
{
// Cubiquity gives us absolute positions for the Octree nodes, but for a hierarchy of
// GameObjects we need relative positions. Obtain these by subtracting parent position.
newGameObject.transform.localPosition = octreeNode.lowerCorner - parentOctreeNode.lowerCorner;
}
else
{
// If not then the parent must be the Volume GameObject and the one we are creating
// must be the root of the Octree. In this case we can use the position directly.
newGameObject.transform.localPosition = octreeNode.lowerCorner;
}
return(newGameObject);
}
public static void syncNode(ref uint availableSyncOperations, GameObject nodeGameObject, uint nodeHandle, GameObject voxelTerrainGameObject)
{
OctreeNode octreeNode = nodeGameObject.GetComponent <OctreeNode>();
CuOctreeNode cuOctreeNode = CubiquityDLL.GetOctreeNode(nodeHandle);
////////////////////////////////////////////////////////////////////////////////
// Has anything in this node or its children changed? If so, we may need to syncronise the node's properties, mesh and
// structure. Each of these can be tested against a timestamp. We may also need to do this recursively on child nodes.
////////////////////////////////////////////////////////////////////////////////
if (cuOctreeNode.nodeOrChildrenLastChanged > octreeNode.nodeAndChildrenLastSynced)
{
bool resyncedProperties = false; // See comments where this is tested - it's a bit of a hack
////////////////////////////////////////////////////////////////////////////////
// 1st test - Have the properties of the node changed?
////////////////////////////////////////////////////////////////////////////////
if (cuOctreeNode.propertiesLastChanged > octreeNode.propertiesLastSynced)
{
octreeNode.renderThisNode = cuOctreeNode.renderThisNode != 0;
octreeNode.height = cuOctreeNode.height;
octreeNode.propertiesLastSynced = CubiquityDLL.GetCurrentTime();
resyncedProperties = true;
}
////////////////////////////////////////////////////////////////////////////////
// 2nd test - Has the mesh changed and do we have time to syncronise it?
////////////////////////////////////////////////////////////////////////////////
if ((cuOctreeNode.meshLastChanged > octreeNode.meshLastSynced) && (availableSyncOperations > 0))
{
if (cuOctreeNode.hasMesh == 1)
{
// Set up the rendering mesh
VolumeRenderer volumeRenderer = voxelTerrainGameObject.GetComponent <VolumeRenderer>();
if (volumeRenderer != null)
{
MeshFilter meshFilter = nodeGameObject.GetOrAddComponent <MeshFilter>() as MeshFilter;
if (meshFilter.sharedMesh == null)
{
meshFilter.sharedMesh = new Mesh();
}
MeshRenderer meshRenderer = nodeGameObject.GetOrAddComponent <MeshRenderer>() as MeshRenderer;
if (voxelTerrainGameObject.GetComponent <Volume>().GetType() == typeof(TerrainVolume))
{
MeshConversion.BuildMeshFromNodeHandleForTerrainVolume(meshFilter.sharedMesh, nodeHandle, false);
}
else if (voxelTerrainGameObject.GetComponent <Volume>().GetType() == typeof(ColoredCubesVolume))
{
MeshConversion.BuildMeshFromNodeHandleForColoredCubesVolume(meshFilter.sharedMesh, nodeHandle, false);
}
meshRenderer.enabled = volumeRenderer.enabled && octreeNode.renderThisNode;
// For syncing materials, shadow properties, etc.
syncNodeWithVolumeRenderer(nodeGameObject, volumeRenderer, false);
}
// Set up the collision mesh
VolumeCollider volumeCollider = voxelTerrainGameObject.GetComponent <VolumeCollider>();
if (volumeCollider != null)
{
bool useCollider = volumeCollider.useInEditMode || Application.isPlaying;
if (useCollider)
{
// I'm not quite comfortable with this. For some reason we have to create this new mesh, fill it,
// and set it as the collider's shared mesh, whereas I would rather just pass the collider's sharedMesh
// straight to the functon that fills it. For some reason that doesn't work properly, and we see
// issues with objects falling through terrain or not updating when part of the terrain is deleted.
// It's to be investigated further... perhaps we could try deleting and recreating the MeshCollider?
// Still, the approach below seems to work properly.
Mesh collisionMesh = new Mesh();
if (voxelTerrainGameObject.GetComponent <Volume>().GetType() == typeof(TerrainVolume))
{
MeshConversion.BuildMeshFromNodeHandleForTerrainVolume(collisionMesh, nodeHandle, true);
}
else if (voxelTerrainGameObject.GetComponent <Volume>().GetType() == typeof(ColoredCubesVolume))
{
MeshConversion.BuildMeshFromNodeHandleForColoredCubesVolume(collisionMesh, nodeHandle, true);
}
MeshCollider meshCollider = nodeGameObject.GetOrAddComponent <MeshCollider>() as MeshCollider;
meshCollider.sharedMesh = collisionMesh;
}
}
}
// If there is no mesh in Cubiquity then we make sure there isn't one in Unity.
else
{
MeshCollider meshCollider = nodeGameObject.GetComponent <MeshCollider>() as MeshCollider;
if (meshCollider)
{
Utility.DestroyOrDestroyImmediate(meshCollider);
}
MeshRenderer meshRenderer = nodeGameObject.GetComponent <MeshRenderer>() as MeshRenderer;
if (meshRenderer)
{
Utility.DestroyOrDestroyImmediate(meshRenderer);
}
MeshFilter meshFilter = nodeGameObject.GetComponent <MeshFilter>() as MeshFilter;
if (meshFilter)
{
Utility.DestroyOrDestroyImmediate(meshFilter);
}
}
octreeNode.meshLastSynced = CubiquityDLL.GetCurrentTime();
availableSyncOperations--;
}
// We want to syncronize the properties before the mesh, so that the enabled flag can be set correctly when the mesh
// is created. But we also want to syncronize properties after the mesh, so we can apply the correct enabled flag to
// existing meshes when the node's 'renderThisNode' flag has changed. Therefore we set the 'resyncedProperties' flag
// previously to let ourseves know that we should come back an finish the propertiy syncing here. It's a bit of a hack.
if (resyncedProperties)
{
VolumeRenderer volumeRenderer = voxelTerrainGameObject.GetComponent <VolumeRenderer>();
if (volumeRenderer != null)
{
syncNodeWithVolumeRenderer(nodeGameObject, volumeRenderer, false);
}
VolumeCollider volumeCollider = voxelTerrainGameObject.GetComponent <VolumeCollider>();
if (volumeCollider != null)
{
syncNodeWithVolumeCollider(nodeGameObject, volumeCollider, false);
}
}
uint[, ,] childHandleArray = new uint[2, 2, 2];
childHandleArray[0, 0, 0] = cuOctreeNode.childHandle000;
childHandleArray[0, 0, 1] = cuOctreeNode.childHandle001;
childHandleArray[0, 1, 0] = cuOctreeNode.childHandle010;
childHandleArray[0, 1, 1] = cuOctreeNode.childHandle011;
childHandleArray[1, 0, 0] = cuOctreeNode.childHandle100;
childHandleArray[1, 0, 1] = cuOctreeNode.childHandle101;
childHandleArray[1, 1, 0] = cuOctreeNode.childHandle110;
childHandleArray[1, 1, 1] = cuOctreeNode.childHandle111;
////////////////////////////////////////////////////////////////////////////////
// 3rd test - Has the structure of the octree node changed (gained or lost children)?
////////////////////////////////////////////////////////////////////////////////
if (cuOctreeNode.structureLastChanged > octreeNode.structureLastSynced)
{
//Now syncronise any children
for (uint z = 0; z < 2; z++)
{
for (uint y = 0; y < 2; y++)
{
for (uint x = 0; x < 2; x++)
{
if (childHandleArray[x, y, z] != 0xFFFFFFFF)
{
uint childNodeHandle = childHandleArray[x, y, z];
if (octreeNode.GetChild(x, y, z) == null)
{
octreeNode.SetChild(x, y, z, OctreeNode.CreateOctreeNode(childNodeHandle, nodeGameObject));
}
}
else
{
if (octreeNode.GetChild(x, y, z))
{
Utility.DestroyOrDestroyImmediate(octreeNode.GetChild(x, y, z));
octreeNode.SetChild(x, y, z, null);
}
}
}
}
}
octreeNode.structureLastSynced = CubiquityDLL.GetCurrentTime();
}
////////////////////////////////////////////////////////////////////////////////
// The last step of syncronization is to apply it recursively to our children.
////////////////////////////////////////////////////////////////////////////////
for (uint z = 0; z < 2; z++)
{
for (uint y = 0; y < 2; y++)
{
for (uint x = 0; x < 2; x++)
{
if (octreeNode.GetChild(x, y, z) != null && availableSyncOperations > 0)
{
OctreeNode.syncNode(ref availableSyncOperations, octreeNode.GetChild(x, y, z), childHandleArray[x, y, z], voxelTerrainGameObject);
}
}
}
}
// We've reached the end of our syncronization process. If there are still sync operations available then
// we did less work then we could have, which implies we finished. Therefore mark the whole tree as synced.
if (availableSyncOperations > 0)
{
octreeNode.nodeAndChildrenLastSynced = CubiquityDLL.GetCurrentTime();
}
}
}