/// <summary>
/// Private counterpart to the public Add method.
/// </summary>
/// <param name="i_nodeIndex">Internal octree node index.</param>
/// <param name="i_instanceID">External instance index, ot unique entity index.</param>
/// <param name="i_entityVersion">Optional, used when Id is used as entity index.</param>
/// <param name="instanceBounds">External 3D bounding box around the instance to add.</param>
static private bool _NodeInstanceSubAdd(ref RootNodeData rootNodeData, int i_nodeIndex, int i_instanceID, int i_entityVersion, Bounds instanceBounds, ref DynamicBuffer <NodeBufferElement> a_nodesBuffer, ref DynamicBuffer <NodeSparesBufferElement> a_nodeSparesBuffer, ref DynamicBuffer <NodeChildrenBufferElement> a_nodeChildrenBuffer, ref DynamicBuffer <NodeInstancesIndexBufferElement> a_nodeInstancesIndexBuffer, ref DynamicBuffer <InstanceBufferElement> a_instanceBuffer, ref DynamicBuffer <InstancesSpareIndexBufferElement> a_instancesSpareIndexBuffer, int i_requiredNumberOfInstances)
{
bool isInstanceAdded = false;
NodeBufferElement nodeBuffer = a_nodesBuffer [i_nodeIndex];
// We know it fits at this level if we've got this far
// Just add if few objects are here, or children would be below min size
int i_instancesCount = nodeBuffer.i_instancesCount;
if (i_instancesCount < rootNodeData.i_instancesAllowedCount || (nodeBuffer.f_baseLength / 2) < rootNodeData.f_minSize)
{
_AssingInstance2Node(rootNodeData, i_nodeIndex, i_instanceID, i_entityVersion, instanceBounds, ref a_nodesBuffer, ref a_instanceBuffer, ref a_nodeInstancesIndexBuffer, a_instancesSpareIndexBuffer);
// a_nodesBuffer
if (rootNodeData.i_instancesSpareLastIndex == 0 || i_requiredNumberOfInstances > a_instanceBuffer.Length)
{
// Add some spares if needed.
CommonMethods._AddInstanceSpares(ref rootNodeData, ref a_instanceBuffer, ref a_instancesSpareIndexBuffer, i_requiredNumberOfInstances);
}
else
{
rootNodeData.i_instancesSpareLastIndex--;
}
/*
* // Debugging
* GameObject go = GameObject.Find ( "Instance " + i_instanceID.ToString () ) ;
*
* if ( go != null )
* {
* Debug.Log ( "Instance: New game object #" + i_instanceID.ToString () ) ;
* go.SetActive ( true ) ;
* go.transform.localScale = instanceBounds.size ;
* }
* else
* {
* Debug.Log ( "Instance: New game object #" + i_instanceID.ToString () ) ;
*
* GameObject newGameObject = GameObject.Instantiate ( GameObject.Find ( "TempInstance" ), instanceBounds.center, Quaternion.identity ) ;
* newGameObject.transform.localScale = instanceBounds.size ;
*
* newGameObject.name = "Instance " + i_instanceID.ToString () ;
* }
*/
}
else
{
// Fits at this level, but we can go deeper. Would it fit there?
// Create the 8 children
int i_bestFitChildLocalIndex;
int i_bestChildIndex;
nodeBuffer = a_nodesBuffer [i_nodeIndex];
int i_childrenCount = nodeBuffer.i_childrenCount;
int i_childrenIndexOffset = i_nodeIndex * 8;
NodeChildrenBufferElement nodeChildrenBuffer;
if (i_childrenCount == 0)
{
// Split Octree node, into 8 new smaller nodes as children nodex.
_Split(ref rootNodeData, i_nodeIndex, ref a_nodesBuffer, ref a_nodeSparesBuffer, ref a_nodeChildrenBuffer, ref a_nodeInstancesIndexBuffer);
NodeInstancesIndexBufferElement nodeInstancesIndexBuffer = a_nodeInstancesIndexBuffer [i_nodeIndex];
int i_nodeInstanceIndexOffset = nodeInstancesIndexBuffer.i;
// Now that we have the new children, see if this node's existing objects would fit there
for (int i = i_instancesCount - 1; i >= 0; i--)
{
int i_instanceIndexOffset = i_nodeInstanceIndexOffset + i;
if (i_instanceIndexOffset >= 0)
{
InstanceBufferElement existingInstanceBuffer = a_instanceBuffer [i_instanceIndexOffset];
if (existingInstanceBuffer.i_ID >= 0)
{
// Find which child the object is closest to based on, where the
// object's center is located in relation to the octree's center.
i_bestFitChildLocalIndex = CommonMethods._BestFitChild(i_nodeIndex, existingInstanceBuffer.bounds, a_nodesBuffer);
i_bestChildIndex = i_childrenIndexOffset + i_bestFitChildLocalIndex;
nodeChildrenBuffer = a_nodeChildrenBuffer [i_bestChildIndex];
// Does it fit?
if (CommonMethods._Encapsulates(nodeChildrenBuffer.bounds, existingInstanceBuffer.bounds))
{
isInstanceAdded = _NodeInstanceSubAdd(
ref rootNodeData,
nodeChildrenBuffer.i_nodesIndex,
existingInstanceBuffer.i_ID,
existingInstanceBuffer.i_entityVersion,
existingInstanceBuffer.bounds,
ref a_nodesBuffer,
ref a_nodeSparesBuffer,
ref a_nodeChildrenBuffer,
ref a_nodeInstancesIndexBuffer,
ref a_instanceBuffer,
ref a_instancesSpareIndexBuffer,
i_requiredNumberOfInstances
); // Go a level deeper
// Remove from here
CommonMethods._PutBackSpareInstance(ref rootNodeData, i_instanceIndexOffset, i_nodeIndex, ref a_nodeInstancesIndexBuffer, ref a_instancesSpareIndexBuffer);
nodeBuffer = a_nodesBuffer [i_nodeIndex];
nodeBuffer.i_instancesCount--;
a_nodesBuffer [i_nodeIndex] = nodeBuffer;
}
}
}
}
}
// Now handle the new object we're adding now.
i_bestFitChildLocalIndex = CommonMethods._BestFitChild(i_nodeIndex, instanceBounds, a_nodesBuffer);
i_bestChildIndex = i_childrenIndexOffset + i_bestFitChildLocalIndex;
nodeChildrenBuffer = a_nodeChildrenBuffer [i_bestChildIndex];
if (CommonMethods._Encapsulates(nodeChildrenBuffer.bounds, instanceBounds))
{
isInstanceAdded = _NodeInstanceSubAdd(
ref rootNodeData,
nodeChildrenBuffer.i_nodesIndex,
i_instanceID,
i_entityVersion,
instanceBounds,
ref a_nodesBuffer,
ref a_nodeSparesBuffer,
ref a_nodeChildrenBuffer,
ref a_nodeInstancesIndexBuffer,
ref a_instanceBuffer,
ref a_instancesSpareIndexBuffer,
i_requiredNumberOfInstances
);
}
else
{
_AssingInstance2Node(rootNodeData, i_nodeIndex, i_instanceID, i_entityVersion, instanceBounds, ref a_nodesBuffer, ref a_instanceBuffer, ref a_nodeInstancesIndexBuffer, a_instancesSpareIndexBuffer);
if (rootNodeData.i_instancesSpareLastIndex == 0 || i_requiredNumberOfInstances > a_instanceBuffer.Length)
{
// Add some spares if needed.
CommonMethods._AddInstanceSpares(ref rootNodeData, ref a_instanceBuffer, ref a_instancesSpareIndexBuffer, i_requiredNumberOfInstances);
}
else
{
rootNodeData.i_instancesSpareLastIndex--;
}
/*
* // Debugging
* Debug.Log ( "Instance: New game object #" + i_instanceID.ToString () ) ;
*
* GameObject newGameObject = GameObject.Instantiate ( GameObject.Find ( "TempInstance" ), instanceBounds.center, Quaternion.identity ) ;
* newGameObject.transform.localScale = instanceBounds.size ;
* newGameObject.name = i_instanceID.ToString () ;
*/
}
}
return(isInstanceAdded);
}
/// <summary>
/// Splits the octree into eight children.
/// </summary>
/// <param name="i_nodeIndex">Internal octree node index.</param>
static private void _Split(ref RootNodeData rootNodeData, int i_nodeIndex, ref DynamicBuffer <NodeBufferElement> a_nodesBuffer, ref DynamicBuffer <NodeSparesBufferElement> a_nodeSparesBuffer, ref DynamicBuffer <NodeChildrenBufferElement> a_nodeChildrenBuffer, ref DynamicBuffer <NodeInstancesIndexBufferElement> a_nodeInstancesIndexBuffer)
{
NodeBufferElement nodeBuffer = a_nodesBuffer [i_nodeIndex];
float f_nodeBaseLength = nodeBuffer.f_baseLength;
float f_quarter = f_nodeBaseLength / 4f;
float f_newBaseLength = f_nodeBaseLength / 2;
float3 f3_center = nodeBuffer.f3_center;
nodeBuffer.i_childrenCount = 8;
a_nodesBuffer [i_nodeIndex] = nodeBuffer;
int i_childrenIndexOffset = i_nodeIndex * 8;
// Create for this node, 8 new children nodes
NodeChildrenBufferElement nodeChildrenBuffer;
// Allocate spare nodes, to children nodes.
// Is assumed, there is enough spare nodes
for (int i = 0; i < 8; i++)
{
NodeSparesBufferElement nodeSparesBuffer = a_nodeSparesBuffer [rootNodeData.i_nodeSpareLastIndex];
nodeChildrenBuffer = a_nodeChildrenBuffer [i_childrenIndexOffset + i];
nodeChildrenBuffer.i_nodesIndex = nodeSparesBuffer.i;
a_nodeChildrenBuffer [i_childrenIndexOffset + i] = nodeChildrenBuffer; // Set back
rootNodeData.i_nodeSpareLastIndex--;
}
float3 f3_childCenterQuater;
nodeChildrenBuffer = a_nodeChildrenBuffer [i_childrenIndexOffset];
f3_childCenterQuater = f3_center + new float3(-f_quarter, f_quarter, -f_quarter);
CommonMethods._CreateNewNode(ref rootNodeData, nodeChildrenBuffer.i_nodesIndex, f_newBaseLength, f3_childCenterQuater, ref a_nodesBuffer, ref a_nodeSparesBuffer, ref a_nodeChildrenBuffer, ref a_nodeInstancesIndexBuffer);
nodeChildrenBuffer = a_nodeChildrenBuffer [i_childrenIndexOffset + 1];
f3_childCenterQuater = f3_center + new float3(f_quarter, f_quarter, -f_quarter);
CommonMethods._CreateNewNode(ref rootNodeData, nodeChildrenBuffer.i_nodesIndex, f_newBaseLength, f3_childCenterQuater, ref a_nodesBuffer, ref a_nodeSparesBuffer, ref a_nodeChildrenBuffer, ref a_nodeInstancesIndexBuffer);
nodeChildrenBuffer = a_nodeChildrenBuffer [i_childrenIndexOffset + 2];
f3_childCenterQuater = f3_center + new float3(-f_quarter, f_quarter, f_quarter);
CommonMethods._CreateNewNode(ref rootNodeData, nodeChildrenBuffer.i_nodesIndex, f_newBaseLength, f3_childCenterQuater, ref a_nodesBuffer, ref a_nodeSparesBuffer, ref a_nodeChildrenBuffer, ref a_nodeInstancesIndexBuffer);
nodeChildrenBuffer = a_nodeChildrenBuffer [i_childrenIndexOffset + 3];
f3_childCenterQuater = f3_center + new float3(f_quarter, f_quarter, f_quarter);
CommonMethods._CreateNewNode(ref rootNodeData, nodeChildrenBuffer.i_nodesIndex, f_newBaseLength, f3_childCenterQuater, ref a_nodesBuffer, ref a_nodeSparesBuffer, ref a_nodeChildrenBuffer, ref a_nodeInstancesIndexBuffer);
nodeChildrenBuffer = a_nodeChildrenBuffer [i_childrenIndexOffset + 4];
f3_childCenterQuater = f3_center + new float3(-f_quarter, -f_quarter, -f_quarter);
CommonMethods._CreateNewNode(ref rootNodeData, nodeChildrenBuffer.i_nodesIndex, f_newBaseLength, f3_childCenterQuater, ref a_nodesBuffer, ref a_nodeSparesBuffer, ref a_nodeChildrenBuffer, ref a_nodeInstancesIndexBuffer);
nodeChildrenBuffer = a_nodeChildrenBuffer [i_childrenIndexOffset + 5];
f3_childCenterQuater = f3_center + new float3(f_quarter, -f_quarter, -f_quarter);
CommonMethods._CreateNewNode(ref rootNodeData, nodeChildrenBuffer.i_nodesIndex, f_newBaseLength, f3_childCenterQuater, ref a_nodesBuffer, ref a_nodeSparesBuffer, ref a_nodeChildrenBuffer, ref a_nodeInstancesIndexBuffer);
nodeChildrenBuffer = a_nodeChildrenBuffer [i_childrenIndexOffset + 6];
f3_childCenterQuater = f3_center + new float3(-f_quarter, -f_quarter, f_quarter);
CommonMethods._CreateNewNode(ref rootNodeData, nodeChildrenBuffer.i_nodesIndex, f_newBaseLength, f3_childCenterQuater, ref a_nodesBuffer, ref a_nodeSparesBuffer, ref a_nodeChildrenBuffer, ref a_nodeInstancesIndexBuffer);
nodeChildrenBuffer = a_nodeChildrenBuffer [i_childrenIndexOffset + 7];
f3_childCenterQuater = f3_center + new float3(f_quarter, -f_quarter, f_quarter);
CommonMethods._CreateNewNode(ref rootNodeData, nodeChildrenBuffer.i_nodesIndex, f_newBaseLength, f3_childCenterQuater, ref a_nodesBuffer, ref a_nodeSparesBuffer, ref a_nodeChildrenBuffer, ref a_nodeInstancesIndexBuffer);
}
/// <summary>
/// Find which child node this object would be most likely to fit in.
/// </summary>
/// <param name="i_nodeIndex">Internal octree node index.</param>
/// <param name="objBounds">The external instance bounds.</param>
/// <returns>One of the eight child octants.</returns>
static public int _BestFitChild(int i_nodeIndex, Bounds objBounds, DynamicBuffer <NodeBufferElement> a_nodesBuffer)
{
NodeBufferElement nodeBuffer = a_nodesBuffer [i_nodeIndex];
return((objBounds.center.x <= nodeBuffer.f3_center.x ? 0 : 1) + (objBounds.center.y >= nodeBuffer.f3_center.y ? 0 : 4) + (objBounds.center.z <= nodeBuffer.f3_center.z ? 0 : 2));
}
/// <summary>
/// Grow the octree to fit in all objects.
/// </summary>
/// <param name="f3_direction">Direction to grow.</param>
static private void _GrowOctree(ref RootNodeData rootNodeData, float3 f3_direction, ref DynamicBuffer <NodeBufferElement> a_nodesBuffer, ref DynamicBuffer <NodeSparesBufferElement> a_nodeSparesBuffer, ref DynamicBuffer <NodeChildrenBufferElement> a_nodeChildrenBuffer, ref DynamicBuffer <NodeInstancesIndexBufferElement> a_nodeInstancesIndexBuffer, ref DynamicBuffer <InstanceBufferElement> a_instanceBuffer, ref DynamicBuffer <InstancesSpareIndexBufferElement> a_instancesSpareIndexBuffer)
{
int xDirection = f3_direction.x >= 0 ? 1 : -1;
int yDirection = f3_direction.y >= 0 ? 1 : -1;
int zDirection = f3_direction.z >= 0 ? 1 : -1;
int i_oldRootNodeIndex = rootNodeData.i_rootNodeIndex;
NodeBufferElement nodeBufferElement = a_nodesBuffer [i_oldRootNodeIndex];
float f_baseLength = nodeBufferElement.f_baseLength;
float f_half = f_baseLength / 2;
float f_newBaseLength = f_baseLength * 2;
float3 f3_newCenter = nodeBufferElement.f3_center + new float3(xDirection * f_half, yDirection * f_half, zDirection * f_half);
// Create a new, bigger octree root node
if (!CommonMethods._HasAnyInstances(i_oldRootNodeIndex, a_nodesBuffer, a_nodeChildrenBuffer))
{
CommonMethods._CreateNewNode(
ref rootNodeData,
rootNodeData.i_rootNodeIndex,
f_newBaseLength,
f3_newCenter,
ref a_nodesBuffer,
ref a_nodeSparesBuffer,
ref a_nodeChildrenBuffer,
ref a_nodeInstancesIndexBuffer
);
}
else
{
NodeSparesBufferElement nodeSparesBuffer = a_nodeSparesBuffer [rootNodeData.i_nodeSpareLastIndex];
rootNodeData.i_rootNodeIndex = nodeSparesBuffer.i;
rootNodeData.i_nodeSpareLastIndex--;
CommonMethods._CreateNewNode(
ref rootNodeData,
rootNodeData.i_rootNodeIndex,
f_newBaseLength,
f3_newCenter,
ref a_nodesBuffer,
ref a_nodeSparesBuffer,
ref a_nodeChildrenBuffer,
ref a_nodeInstancesIndexBuffer
);
// Create 7 new octree children to go with the old root as children of the new root
int i_rootPos = _GetRootPosIndex(xDirection, yDirection, zDirection);
NodeBufferElement nodeBuffer = a_nodesBuffer [rootNodeData.i_rootNodeIndex];
nodeBuffer.i_childrenCount = 8;
a_nodesBuffer [rootNodeData.i_rootNodeIndex] = nodeBuffer; // Set back.
int i_newRootNodeChildrenIndexOffset = rootNodeData.i_rootNodeIndex * 8;
for (int i = 0; i < 8; i++)
{
int i_childIndexOffset = i_newRootNodeChildrenIndexOffset + i;
NodeChildrenBufferElement nodeChildrenBuffer = a_nodeChildrenBuffer [i_childIndexOffset];
if (i == i_rootPos)
{
// Assign old root node as a child.
nodeChildrenBuffer.i_nodesIndex = i_oldRootNodeIndex;
InstanceBufferElement instanceBuffer = a_instanceBuffer [i_oldRootNodeIndex];
nodeChildrenBuffer.bounds = instanceBuffer.bounds;
}
else
{
// Assign rest 7 children
xDirection = i % 2 == 0 ? -1 : 1;
yDirection = i > 3 ? -1 : 1;
zDirection = (i < 2 || (i > 3 && i < 6)) ? -1 : 1;
nodeSparesBuffer = a_nodeSparesBuffer [rootNodeData.i_nodeSpareLastIndex];
int i_newNodeIndex = nodeSparesBuffer.i; // Expected output 0 at initialization
rootNodeData.i_nodeSpareLastIndex--;
float3 f3_childVector = f3_newCenter + new float3(xDirection * f_half, yDirection * f_half, zDirection * f_half);
CommonMethods._CreateNewNode(
ref rootNodeData,
i_newNodeIndex,
f_newBaseLength,
f3_childVector,
ref a_nodesBuffer,
ref a_nodeSparesBuffer,
ref a_nodeChildrenBuffer,
ref a_nodeInstancesIndexBuffer
);
nodeChildrenBuffer.i_nodesIndex = i_newNodeIndex;
Bounds bounds = new Bounds( )
{
center = f3_childVector,
size = Vector3.one * f_newBaseLength
};
nodeChildrenBuffer.bounds = bounds;
}
a_nodeChildrenBuffer [i_childIndexOffset] = nodeChildrenBuffer; // Set back.
} // for
}
}
/// <summary>
/// Shrink the octree if possible, else leave it the same.
/// We can shrink the octree if:
/// - This node is >= double minLength in length
/// - All objects in the root node are within one octant
/// - This node doesn't have children, or does but 7/8 children are empty
/// We can also shrink it if there are no objects left at all!
/// </summary>
/// <param name="i_nodeIndex">Internal octree node index.</param>
/// <param name="minLength">Minimum dimensions of a node in this octree.</param>
/// <returns>The new root index, or the existing one if we didn't shrink.</returns>
static private int _ShrinkIfPossible(RootNodeData rootNodeData, int i_nodeIndex, float minLength, DynamicBuffer <NodeBufferElement> a_nodesBuffer, ref DynamicBuffer <NodeChildrenBufferElement> a_nodeChildrenBuffer, DynamicBuffer <NodeInstancesIndexBufferElement> a_nodeInstancesIndexBuffer, DynamicBuffer <InstanceBufferElement> a_instanceBuffer)
{
NodeBufferElement nodeBuffer = a_nodesBuffer [i_nodeIndex];
NodeChildrenBufferElement nodeChildrenBuffer;
if (nodeBuffer.f_baseLength < (2 * minLength))
{
return(i_nodeIndex);
}
if (nodeBuffer.i_instancesCount == 0 && nodeBuffer.i_childrenCount == 0)
{
return(i_nodeIndex);
}
int i_nodeChildrenIndexOffset = i_nodeIndex * 8;
int i_nodeInstancesIndexOffset = i_nodeIndex * rootNodeData.i_instancesAllowedCount;
// -1 to 7, where -1 is no result found
int i_bestFit = -1;
// Check objects in root
for (int i = 0; i < rootNodeData.i_instancesAllowedCount; i++)
{
if (nodeBuffer.i_instancesCount == 0)
{
break;
}
NodeInstancesIndexBufferElement nodeInstancesIndexBuffer = a_nodeInstancesIndexBuffer [i_nodeInstancesIndexOffset + i];
if (nodeInstancesIndexBuffer.i >= 0)
{
InstanceBufferElement instanceBuffer = a_instanceBuffer [nodeInstancesIndexBuffer.i];
int newBestFit = CommonMethods._BestFitChild(i_nodeIndex, instanceBuffer.bounds, a_nodesBuffer);
if (i == 0 || newBestFit == i_bestFit)
{
nodeChildrenBuffer = a_nodeChildrenBuffer [i_nodeChildrenIndexOffset + newBestFit];
// In same octant as the other(s). Does it fit completely inside that octant?
if (CommonMethods._Encapsulates(nodeChildrenBuffer.bounds, instanceBuffer.bounds))
{
if (i_bestFit < 0)
{
i_bestFit = newBestFit;
}
}
else
{
// Nope, so we can't reduce. Otherwise we continue
return(i_nodeIndex);
}
}
else
{
return(i_nodeIndex); // Can't reduce - objects fit in different octants
}
}
} // for
// Check instances in children if there are any
if (nodeBuffer.i_childrenCount > 0)
{
bool childHadContent = false;
for (int i = 0; i < 8; i++)
{
nodeChildrenBuffer = a_nodeChildrenBuffer [i_nodeChildrenIndexOffset + i];
// Has child any instances
if (CommonMethods._HasAnyInstances(nodeChildrenBuffer.i_nodesIndex, a_nodesBuffer, a_nodeChildrenBuffer))
{
if (childHadContent)
{
return(i_nodeIndex); // Can't shrink - another child had content already
}
if (i_bestFit >= 0 && i_bestFit != i)
{
return(i_nodeIndex); // Can't reduce - objects in root are in a different octant to objects in child
}
childHadContent = true;
i_bestFit = i;
}
}
}
// Can reduce
else if (nodeBuffer.i_childrenCount == 0)
{
nodeChildrenBuffer = a_nodeChildrenBuffer [i_nodeChildrenIndexOffset + i_bestFit];
Bounds childBounds = nodeChildrenBuffer.bounds;
// We don't have any children, so just shrink this node to the new size
// We already know that everything will still fit in it
CommonMethods._SetValues(rootNodeData, i_nodeIndex, nodeBuffer.f_baseLength / 2, childBounds.center, ref a_nodesBuffer, ref a_nodeChildrenBuffer);
return(i_nodeIndex);
}
// No objects in entire octree
if (i_bestFit == -1)
{
return(i_nodeIndex);
}
// We have children. Use the appropriate child as the new root node
nodeChildrenBuffer = a_nodeChildrenBuffer [i_nodeChildrenIndexOffset + i_bestFit];
return(nodeChildrenBuffer.i_nodesIndex);
}
/// <summary>
/// Remove an instace. Makes the assumption that the instance only exists once in the tree.
/// </summary>
/// <param name="i_nodeIndex">Internal octree node index.</param>
/// <param name="i_instanceID">External instance index ID to remove. Is assumed, only one unique instance ID exists in the tree.</param>
/// <returns>True if the object was removed successfully.</returns>
static private bool _NodeRemoveInstance(ref RootNodeData rootNodeData, int i_nodeIndex, int i_instanceID, ref DynamicBuffer <NodeBufferElement> a_nodesBuffer, ref DynamicBuffer <NodeSparesBufferElement> a_nodeSparesBuffer, DynamicBuffer <NodeChildrenBufferElement> a_nodeChildrenBuffer, DynamicBuffer <NodeInstancesIndexBufferElement> a_nodeInstancesIndexBuffer, ref DynamicBuffer <InstanceBufferElement> a_instanceBuffer, ref DynamicBuffer <InstancesSpareIndexBufferElement> a_instancesSpareIndexBuffer)
{
bool removed = false;
NodeBufferElement nodeBuffer = a_nodesBuffer [i_nodeIndex];
int i_nodeInstancesIndexOffset = i_nodeIndex * rootNodeData.i_instancesAllowedCount;
if (nodeBuffer.i_instancesCount > 0)
{
// Try remove instance from this node
for (int i = 0; i < rootNodeData.i_instancesAllowedCount; i++)
{
int i_nodeInstanceIndex = i_nodeInstancesIndexOffset + i;
NodeInstancesIndexBufferElement nodeInstancesIndexBuffer = a_nodeInstancesIndexBuffer [i_nodeInstancesIndexOffset + i];
int i_existingInstanceIndex = nodeInstancesIndexBuffer.i;
// If instance exists
if (i_existingInstanceIndex >= 0)
{
InstanceBufferElement instanceBuffer = a_instanceBuffer [i_existingInstanceIndex];
if (instanceBuffer.i_ID == i_instanceID)
{
removed = true;
// Remove from here
CommonMethods._PutBackSpareInstance(ref rootNodeData, i_existingInstanceIndex, i_nodeInstanceIndex, ref a_nodeInstancesIndexBuffer, ref a_instancesSpareIndexBuffer);
/*
* // Debugging
* GameObject go = GameObject.Find ( "Instance " + i_instanceID.ToString () ) ;
*
* if ( go != null )
* {
* Debug.Log ( "Instance: Hide game object #" + i_instanceID.ToString () ) ;
* go.SetActive ( false ) ;
* // go.transform.localScale = instanceBounds.size ;
* }
*
* Debug.LogWarning ( "Node: Remove #" + i_nodeIndex ) ;
* GameObject.Destroy ( GameObject.Find ( "Node " + i_nodeIndex.ToString () ) ) ;
*/
nodeBuffer.i_instancesCount--;
instanceBuffer.i_ID = -1; // Reset
a_instanceBuffer [i_existingInstanceIndex] = instanceBuffer; // Set back
break;
}
}
} // for
a_nodesBuffer [i_nodeIndex] = nodeBuffer; // Set back
}
int i_nodeChildrenCount = nodeBuffer.i_childrenCount;
int i_nodeChildrenIndexOffset = i_nodeIndex * 8;
// Try remove instance from this node children, if node don't have this instance
if (!removed && i_nodeChildrenCount > 0)
{
for (int i = 0; i < 8; i++)
{
// Get children index of this node
NodeChildrenBufferElement nodeChildrenBuffer = a_nodeChildrenBuffer [i_nodeChildrenIndexOffset + i];
int i_childNodeIndex = nodeChildrenBuffer.i_nodesIndex;
// Ignore negative index
if (i_childNodeIndex >= 0)
{
removed = _NodeRemoveInstance(
ref rootNodeData,
i_childNodeIndex,
i_instanceID,
ref a_nodesBuffer,
ref a_nodeSparesBuffer,
a_nodeChildrenBuffer,
a_nodeInstancesIndexBuffer,
ref a_instanceBuffer,
ref a_instancesSpareIndexBuffer
);
if (removed)
{
break;
}
}
}
}
if (removed && i_nodeChildrenCount > 0)
{
// Check if we should merge nodes now that we've removed an item
if (_ShouldMerge(ref rootNodeData, i_nodeIndex, a_nodesBuffer, ref a_nodeChildrenBuffer))
{
_MergeNodes(
ref rootNodeData,
i_nodeIndex,
ref a_nodesBuffer,
ref a_nodeSparesBuffer,
a_nodeChildrenBuffer,
a_nodeInstancesIndexBuffer,
ref a_instancesSpareIndexBuffer
);
}
}
return(removed);
}
/// <summary>
/// Returns an array of objects that intersect with the specified ray, if any. Otherwise returns an empty array. See also: IsColliding.
/// </summary>
/// <param name="i_nodeIndex">Internal octree node index.</param>
/// <param name="checkRay">Ray to check. Passing by ref as it improves performance with structs.</param>
/// <param name="l_resultInstanceIDs">List result.</param>
/// <param name="i_nearestIndex">Nerest collision index from the lits.</param>
/// <param name="f_nearestDistance">Nerest collision distance.</param>
/// <param name="maxDistance">Distance to check.</param>
/// <returns>Instances index, that intersect with the specified ray.</returns>
static public bool _GetNodeColliding(RootNodeData rootNodeData, int i_nodeIndex, Ray checkRay, ref DynamicBuffer <CollisionInstancesBufferElement> a_collisionInstancesBuffer, ref IsCollidingData isCollidingData, DynamicBuffer <NodeBufferElement> a_nodesBuffer, DynamicBuffer <NodeChildrenBufferElement> a_nodeChildrenBuffer, DynamicBuffer <NodeInstancesIndexBufferElement> a_nodeInstancesIndexBuffer, DynamicBuffer <InstanceBufferElement> a_instanceBuffer, float f_maxDistance = float.PositiveInfinity)
{
float f_distance;
NodeBufferElement nodeBuffer = a_nodesBuffer [i_nodeIndex];
if (!nodeBuffer.bounds.IntersectRay(checkRay, out f_distance) || f_distance > f_maxDistance)
{
return(isCollidingData.i_collisionsCount > 0 ? true : false);
}
if (nodeBuffer.i_instancesCount > 0)
{
int i_nodeInstancesIndexOffset = i_nodeIndex * rootNodeData.i_instancesAllowedCount;
CollisionInstancesBufferElement collisionInstancesBuffer = new CollisionInstancesBufferElement();
// Check against any objects in this node
for (int i = 0; i < rootNodeData.i_instancesAllowedCount; i++)
{
NodeInstancesIndexBufferElement nodeInstancesIndexBuffer = a_nodeInstancesIndexBuffer [i_nodeInstancesIndexOffset + i];
// Get index of instance
int i_instanceIndex = nodeInstancesIndexBuffer.i;
// Check if instance exists, and if has intersecting bounds.
if (i_instanceIndex >= 0)
{
InstanceBufferElement instanceBuffer = a_instanceBuffer [i_instanceIndex];
if (instanceBuffer.bounds.IntersectRay(checkRay, out f_distance) && f_distance <= f_maxDistance)
{
if (f_distance < isCollidingData.f_nearestDistance)
{
isCollidingData.f_nearestDistance = f_distance;
isCollidingData.i_nearestInstanceCollisionIndex = isCollidingData.i_collisionsCount;
}
// Is expected, that the required length is no greater than current length + 1
// And is not negative.
int i_collisionsCount = isCollidingData.i_collisionsCount;
collisionInstancesBuffer.i_ID = instanceBuffer.i_ID;
collisionInstancesBuffer.i_version = instanceBuffer.i_entityVersion; // Optional, used when Id is used as entity index
// Assign colliding instance ID to buffer.
if (a_collisionInstancesBuffer.Length <= i_collisionsCount)
{
// Expand buffer if needed
a_collisionInstancesBuffer.Add(collisionInstancesBuffer);
}
else
{
a_collisionInstancesBuffer [i_collisionsCount] = collisionInstancesBuffer;
}
isCollidingData.i_collisionsCount++;
}
}
}
}
// Check children for collisions
// Check if having children
if (nodeBuffer.i_childrenCount > 0)
{
int i_nodeChildrenIndexOffset = i_nodeIndex * 8;
// We checked that is having children.
for (int i = 0; i < 8; i++)
{
NodeChildrenBufferElement nodeChildrenBuffer = a_nodeChildrenBuffer [i_nodeChildrenIndexOffset + i];
int i_nodeChildIndex = nodeChildrenBuffer.i_nodesIndex;
// Check if node exists
if (i_nodeChildIndex >= 0)
{
_GetNodeColliding(rootNodeData, i_nodeChildIndex, checkRay, ref a_collisionInstancesBuffer, ref isCollidingData, a_nodesBuffer, a_nodeChildrenBuffer, a_nodeInstancesIndexBuffer, a_instanceBuffer, f_maxDistance);
}
}
}
return(isCollidingData.i_collisionsCount > 0 ? true : false);
}
public void Execute(int i_arrayIndex)
{
Entity octreeRootNodeEntity = a_octreeEntities [i_arrayIndex];
DynamicBuffer <AddInstanceBufferElement> a_addInstanceBufferElement = addInstanceBufferElement [octreeRootNodeEntity];
// RootNodeData rootNodeData = a_rootNodeData [octreeRootNodeEntity] ;
DynamicBuffer <NodeSparesBufferElement> a_nodeSparesBuffer = nodeSparesBufferElement [octreeRootNodeEntity];
DynamicBuffer <NodeBufferElement> a_nodesBuffer = nodeBufferElement [octreeRootNodeEntity];
DynamicBuffer <NodeInstancesIndexBufferElement> a_nodeInstancesIndexBuffer = nodeInstancesIndexBufferElement [octreeRootNodeEntity];
DynamicBuffer <NodeChildrenBufferElement> a_nodeChildrenBuffer = nodeChildrenBufferElement [octreeRootNodeEntity];
DynamicBuffer <InstanceBufferElement> a_instanceBuffer = instanceBufferElement [octreeRootNodeEntity];
DynamicBuffer <InstancesSpareIndexBufferElement> a_instancesSpareIndexBuffer = instancesSpareIndexBufferElement [octreeRootNodeEntity];
/// <summary>
/// Add an Instance.
/// </summary>
/// <param name="i_instanceID">External instance to add.</param>
/// <param name="instanceBounds">External instance 3D bounding box around the instance.</param>
//public void _OctreeAddInstance ( ref RootNodeData rootNodeData, int i_instanceID, Bounds instanceBounds, ref DynamicBuffer <NodeBufferElement> a_nodesBuffer, ref DynamicBuffer <NodeSparesBufferElement> a_nodeSparesBuffer, ref DynamicBuffer <NodeChildrenBufferElement> a_nodeChildrenBuffer, ref DynamicBuffer <NodeInstancesIndexBufferElement> a_nodeInstancesIndexBuffer, ref DynamicBuffer <InstanceBufferElement> a_instanceBuffer, ref DynamicBuffer <InstancesSpareIndexBufferElement> a_instancesSpareIndexBuffer )
//{
// Iterate through number of instances to add, from the buffer
for (int i = 0; i < a_addInstanceBufferElement.Length; i++)
{
RootNodeData rootNodeData = a_rootNodeData [octreeRootNodeEntity];
AddInstanceBufferElement addInstanceBuffer = a_addInstanceBufferElement [i];
// Add object or expand the octree until it can be added
int i_count = 0; // Safety check against infinite/excessive growth
bool isInstanceAdded = false;
while (
!_AddNodeInstance(ref rootNodeData,
addInstanceBuffer.i_instanceID,
addInstanceBuffer.i_version,
addInstanceBuffer.instanceBounds,
ref a_nodesBuffer,
ref a_nodeSparesBuffer,
ref a_nodeChildrenBuffer,
ref a_nodeInstancesIndexBuffer,
ref a_instanceBuffer,
ref a_instancesSpareIndexBuffer,
out isInstanceAdded
)
)
{
NodeBufferElement nodeBufferElement = a_nodesBuffer [rootNodeData.i_rootNodeIndex];
_GrowOctree(ref rootNodeData,
(float3)addInstanceBuffer.instanceBounds.center - nodeBufferElement.f3_center,
ref a_nodesBuffer,
ref a_nodeSparesBuffer,
ref a_nodeChildrenBuffer,
ref a_nodeInstancesIndexBuffer,
ref a_instanceBuffer,
ref a_instancesSpareIndexBuffer
);
if (++i_count > 20)
{
// Debug.LogError("Aborted Add operation as it seemed to be going on forever (" + (i_count - 1) + ") attempts at growing the octree.");
return;
}
}
rootNodeData.i_totalInstancesCountInTree++;
a_rootNodeData [octreeRootNodeEntity] = rootNodeData;
}
}
/// <summary>
/// Assign instance to node.
/// </summary>
/// <param name="i_nodeIndex">Internal octree node index.</param>
/// <param name="i_instanceID">External instance index, ot unique entity index.</param>
/// <param name="i_entityVersion">Optional, used when Id is used as entity index.</param>
/// // Optional, used when Id is used as entity index
/// <param name="instanceBounds">Boundary of external instance index.</param>
static private bool _AssingInstance2Node(ref RootNodeData rootNodeData, int i_nodeIndex, int i_instanceID, int i_entityVersion, Bounds instanceBounds, ref DynamicBuffer <NodeBufferElement> a_nodesBuffer, ref DynamicBuffer <NodeSparesBufferElement> a_nodeSparesBuffer, ref DynamicBuffer <NodeChildrenBufferElement> a_nodeChildrenBuffer, ref DynamicBuffer <InstanceBufferElement> a_instanceBuffer, ref DynamicBuffer <NodeInstancesIndexBufferElement> a_nodeInstancesIndexBuffer, ref DynamicBuffer <InstancesSpareIndexBufferElement> a_instancesSpareIndexBuffer)
{
int i_nodeInstanceIndexOffset = i_nodeIndex * rootNodeData.i_instancesAllowedCount;
// Reuse spare store
InstancesSpareIndexBufferElement instancesSpareIndexBuffer = a_instancesSpareIndexBuffer [rootNodeData.i_instancesSpareLastIndex];
NodeInstancesIndexBufferElement nodeInstancesIndexBuffer;
bool isInstanceAdded = false;
// Find next spare instance allocation for this node.
// Find next spare instance allocation for this node.
for (int i = 0; i < rootNodeData.i_instancesAllowedCount; i++)
{
int i_instanceIndexOffset = i_nodeInstanceIndexOffset + i;
nodeInstancesIndexBuffer = a_nodeInstancesIndexBuffer [i_instanceIndexOffset];
// Is spare.
if (nodeInstancesIndexBuffer.i == -1)
{
// Assign instance index.
nodeInstancesIndexBuffer.i = instancesSpareIndexBuffer.i;
a_nodeInstancesIndexBuffer [i_instanceIndexOffset] = nodeInstancesIndexBuffer; // Set back.
isInstanceAdded = true;
break;
}
} // for
if (!isInstanceAdded)
{
// Node has 8 children and an more instances, than capacity.
// Try to move instance to child, with instance space.
// if ( i_instancesCount < rootNodeData.i_instancesAllowedCount && i_childrenCount > 0 )
// Iterate though node's children
for (int i_childIndex = 0; i_childIndex < 8; i_childIndex++)
{
int i_childIndexOffset = i_nodeIndex * 8 + i_childIndex;
NodeChildrenBufferElement nodeChildrenBuffer = a_nodeChildrenBuffer [i_childIndexOffset];
// Check if instance bounds fit in child
if (CommonMethods._Encapsulates(nodeChildrenBuffer.bounds, instanceBounds))
{
//NodeBufferElement childNode = a_nodesBuffer [nodeChildrenBuffer.i_nodesIndex] ;
// Debug.LogWarning ( "ChNode: " + childNode.i_instancesCount + "; " + childNode.bounds ) ;
int i_requiredNumberOfInstances = a_nodeInstancesIndexBuffer.Length; // l_nodeBounds.Count ;
isInstanceAdded = _NodeInstanceSubAdd(
ref rootNodeData,
nodeChildrenBuffer.i_nodesIndex,
i_instanceID,
i_entityVersion,
instanceBounds,
ref a_nodesBuffer,
ref a_nodeSparesBuffer,
ref a_nodeChildrenBuffer,
ref a_nodeInstancesIndexBuffer,
ref a_instanceBuffer,
ref a_instancesSpareIndexBuffer,
i_requiredNumberOfInstances
);
if (isInstanceAdded)
{
return(true); // Added instance
}
}
}
// Debug.LogError ( "Found no child node, to fit instance. Try grow octree." ) ;
NodeBufferElement nodeBufferElement = a_nodesBuffer [rootNodeData.i_rootNodeIndex];
// Try add node at the root
// Debug.LogError ( "Grow again." ) ;
_GrowOctree(ref rootNodeData,
(float3)instanceBounds.center - nodeBufferElement.f3_center,
ref a_nodesBuffer,
ref a_nodeSparesBuffer,
ref a_nodeChildrenBuffer,
ref a_nodeInstancesIndexBuffer,
ref a_instanceBuffer,
ref a_instancesSpareIndexBuffer
);
_AddNodeInstance(ref rootNodeData,
i_instanceID,
i_entityVersion,
instanceBounds,
ref a_nodesBuffer,
ref a_nodeSparesBuffer,
ref a_nodeChildrenBuffer,
ref a_nodeInstancesIndexBuffer,
ref a_instanceBuffer,
ref a_instancesSpareIndexBuffer,
out isInstanceAdded
);
// Debug.LogWarning ( "Is instant added? " + (isInstanceAdded? "y" : "n") ) ;
return(isInstanceAdded);
} // if
NodeBufferElement nodeBuffer = a_nodesBuffer [i_nodeIndex];
nodeBuffer.i_instancesCount++;
a_nodesBuffer [i_nodeIndex] = nodeBuffer; // Set back.
InstanceBufferElement instanceBuffer = new InstanceBufferElement()
{
i_ID = i_instanceID,
i_entityVersion = i_entityVersion, // Optional, used when Id is used as entity index.
bounds = instanceBounds
};
a_instanceBuffer [instancesSpareIndexBuffer.i] = instanceBuffer;
return(true);
}
