public OctreeZone( PCZSceneManager creator, string name )
: base( creator, name )
{
mZoneTypeName = "ZoneType_Octree";
// init octree
AxisAlignedBox b = new AxisAlignedBox( new Vector3( -10000, -10000, -10000 ), new Vector3( 10000, 10000, 10000 ) );
int depth = 8;
rootOctree = null;
Init( b, depth );
}
public void Init( AxisAlignedBox box, int depth )
{
if ( null != rootOctree )
rootOctree = null;
rootOctree = new Octree( this, null );
maxDepth = depth;
this.box = box;
rootOctree.Box = box;
Vector3 min = box.Minimum;
Vector3 max = box.Maximum;
rootOctree.HalfSize = ( max - min ) / 2;
}
public void Init(AxisAlignedBox box, int depth)
{
if (null != this.rootOctree)
{
this.rootOctree = null;
}
this.rootOctree = new Octree(this, null);
this.maxDepth = depth;
this.box = box;
this.rootOctree.Box = box;
Vector3 min = box.Minimum;
Vector3 max = box.Maximum;
this.rootOctree.HalfSize = (max - min) / 2;
}
public Octree(PCZone zone, Octree parent)
{
this.wireBoundingBox = null;
HalfSize = new Vector3();
this.parent = parent;
NunodeList = 0;
this.zone = zone;
//initialize all children to null.
for (int i = 0; i < 2; i++)
{
for (int j = 0; j < 2; j++)
{
for (int k = 0; k < 2; k++)
{
this.Children[i, j, k] = null;
}
}
}
}
public OctreeZoneData(PCZSceneNode node, PCZone zone)
: base(node, zone)
{
this.mOctant = null;
this.mOctreeWorldAABB = AxisAlignedBox.Null;
}
public OctreeZoneData( PCZSceneNode node, PCZone zone )
: base( node, zone )
{
this.mOctant = null;
this.mOctreeWorldAABB = AxisAlignedBox.Null;
}
public Octree( PCZone zone, Octree parent )
{
this.wireBoundingBox = null;
HalfSize = new Vector3();
this.parent = parent;
NunodeList = 0;
this.zone = zone;
//initialize all children to null.
for ( int i = 0; i < 2; i++ )
{
for ( int j = 0; j < 2; j++ )
{
for ( int k = 0; k < 2; k++ )
{
this.Children[ i, j, k ] = null;
}
}
}
}
private void AddNodeToOctree(PCZSceneNode n, Octree octant, int depth)
{
// Skip if octree has been destroyed (shutdown conditions)
if (null == this.rootOctree)
{
return;
}
AxisAlignedBox bx = n.WorldAABB;
//if the octree is twice as big as the scene node,
//we will add it to a child.
if ((depth < this.maxDepth) && octant.IsTwiceSize(bx))
{
int x = 0, y = 0, z = 0;
octant._getChildIndexes(bx, ref x, ref y, ref z);
if (octant.Children[x, y, z] == null)
{
octant.Children[x, y, z] = new Octree(this, octant);
Vector3 octantMin = octant.Box.Minimum;
Vector3 octantMax = octant.Box.Maximum;
Vector3 min, max;
if (x == 0)
{
min.x = octantMin.x;
max.x = (octantMin.x + octantMax.x) / 2;
}
else
{
min.x = (octantMin.x + octantMax.x) / 2;
max.x = octantMax.x;
}
if (y == 0)
{
min.y = octantMin.y;
max.y = (octantMin.y + octantMax.y) / 2;
}
else
{
min.y = (octantMin.y + octantMax.y) / 2;
max.y = octantMax.y;
}
if (z == 0)
{
min.z = octantMin.z;
max.z = (octantMin.z + octantMax.z) / 2;
}
else
{
min.z = (octantMin.z + octantMax.z) / 2;
max.z = octantMax.z;
}
octant.Children[x, y, z].Box.SetExtents(min, max);
octant.Children[x, y, z].HalfSize = (max - min) / 2;
}
AddNodeToOctree(n, octant.Children[x, y, z], ++depth);
}
else
{
if (((OctreeZoneData)n.GetZoneData(this)).Octant == octant)
{
return;
}
RemoveNodeFromOctree(n);
octant.AddNode(n);
}
}
private void WalkOctree(PCZCamera camera, ref List <PCZSceneNode> visibleNodeList, RenderQueue queue, Octree octant,
VisibleObjectsBoundsInfo visibleBounds, bool foundvisible, bool onlyShadowCasters,
bool displayNodes, bool showBoundingBoxes)
{
//return immediately if nothing is in the node.
if (octant.NunodeList == 0)
{
return;
}
Visibility v = Visibility.None;
if (foundvisible)
{
v = Visibility.Full;
}
else if (octant == this.rootOctree)
{
v = Visibility.Partial;
}
else
{
AxisAlignedBox box = octant.Box;
v = camera.GetVisibility(box);
}
// if the octant is visible, or if it's the root node...
if (v != Visibility.None)
{
//Add stuff to be rendered;
bool vis = true;
foreach (PCZSceneNode sn in octant.NodeList.Values)
{
// if the scene node is already visible, then we can skip it
if (sn.LastVisibleFrame != mLastVisibleFrame || sn.LastVisibleFromCamera != camera)
{
// if this octree is partially visible, manually cull all
// scene nodes attached directly to this level.
if (v == Visibility.Partial)
{
vis = camera.IsObjectVisible(sn.WorldAABB);
}
if (vis)
{
// add the node to the render queue
sn.AddToRenderQueue(camera, queue, onlyShadowCasters, visibleBounds);
// add it to the list of visible nodes
visibleNodeList.Add(sn);
// if we are displaying nodes, add the node renderable to the queue
if (displayNodes)
{
queue.AddRenderable(sn.GetDebugRenderable());
}
// if the scene manager or the node wants the bounding box shown, add it to the queue
if (sn.ShowBoundingBox || showBoundingBoxes)
{
sn.AddBoundingBoxToQueue(queue);
}
// flag the node as being visible this frame
sn.LastVisibleFrame = mLastVisibleFrame;
sn.LastVisibleFromCamera = camera;
}
}
}
Octree child;
bool childfoundvisible = (v == Visibility.Full);
if ((child = octant.Children[0, 0, 0]) != null)
{
WalkOctree(camera, ref visibleNodeList, queue, child, visibleBounds, childfoundvisible, onlyShadowCasters,
displayNodes, showBoundingBoxes);
}
if ((child = octant.Children[1, 0, 0]) != null)
{
WalkOctree(camera, ref visibleNodeList, queue, child, visibleBounds, childfoundvisible, onlyShadowCasters,
displayNodes, showBoundingBoxes);
}
if ((child = octant.Children[0, 1, 0]) != null)
{
WalkOctree(camera, ref visibleNodeList, queue, child, visibleBounds, childfoundvisible, onlyShadowCasters,
displayNodes, showBoundingBoxes);
}
if ((child = octant.Children[1, 1, 0]) != null)
{
WalkOctree(camera, ref visibleNodeList, queue, child, visibleBounds, childfoundvisible, onlyShadowCasters,
displayNodes, showBoundingBoxes);
}
if ((child = octant.Children[0, 0, 1]) != null)
{
WalkOctree(camera, ref visibleNodeList, queue, child, visibleBounds, childfoundvisible, onlyShadowCasters,
displayNodes, showBoundingBoxes);
}
if ((child = octant.Children[1, 0, 1]) != null)
{
WalkOctree(camera, ref visibleNodeList, queue, child, visibleBounds, childfoundvisible, onlyShadowCasters,
displayNodes, showBoundingBoxes);
}
if ((child = octant.Children[0, 1, 1]) != null)
{
WalkOctree(camera, ref visibleNodeList, queue, child, visibleBounds, childfoundvisible, onlyShadowCasters,
displayNodes, showBoundingBoxes);
}
if ((child = octant.Children[1, 1, 1]) != null)
{
WalkOctree(camera, ref visibleNodeList, queue, child, visibleBounds, childfoundvisible, onlyShadowCasters,
displayNodes, showBoundingBoxes);
}
}
}
void AddNodeToOctree( PCZSceneNode n, Octree octant, int depth )
{
// Skip if octree has been destroyed (shutdown conditions)
if ( null == rootOctree )
return;
AxisAlignedBox bx = n.WorldAABB;
//if the octree is twice as big as the scene node,
//we will add it to a child.
if ( ( depth < maxDepth ) && octant.IsTwiceSize( bx ) )
{
int x = 0, y = 0, z = 0;
octant._getChildIndexes( bx, ref x, ref y, ref z );
if ( octant.Children[ x, y, z ] == null )
{
octant.Children[ x, y, z ] = new Octree( this, octant );
Vector3 octantMin = octant.Box.Minimum;
Vector3 octantMax = octant.Box.Maximum;
Vector3 min, max;
if ( x == 0 )
{
min.x = octantMin.x;
max.x = ( octantMin.x + octantMax.x ) / 2;
}
else
{
min.x = ( octantMin.x + octantMax.x ) / 2;
max.x = octantMax.x;
}
if ( y == 0 )
{
min.y = octantMin.y;
max.y = ( octantMin.y + octantMax.y ) / 2;
}
else
{
min.y = ( octantMin.y + octantMax.y ) / 2;
max.y = octantMax.y;
}
if ( z == 0 )
{
min.z = octantMin.z;
max.z = ( octantMin.z + octantMax.z ) / 2;
}
else
{
min.z = ( octantMin.z + octantMax.z ) / 2;
max.z = octantMax.z;
}
octant.Children[ x, y, z ].Box.SetExtents( min, max );
octant.Children[ x, y, z ].HalfSize = ( max - min ) / 2;
}
AddNodeToOctree( n, octant.Children[ x, y, z ], ++depth );
}
else
{
if ( ( (OctreeZoneData)n.GetZoneData( this ) ).Octant == octant )
return;
RemoveNodeFromOctree( n );
octant.AddNode( n );
}
}
private void WalkOctree( PCZCamera camera,
ref List<PCZSceneNode> visibleNodeList,
RenderQueue queue,
Octree octant,
VisibleObjectsBoundsInfo visibleBounds,
bool foundvisible,
bool onlyShadowCasters,
bool displayNodes,
bool showBoundingBoxes )
{
//return immediately if nothing is in the node.
if ( octant.NunodeList == 0 )
return;
Visibility v = Visibility.None;
if ( foundvisible )
{
v = Visibility.Full;
}
else if ( octant == rootOctree )
{
v = Visibility.Partial;
}
else
{
AxisAlignedBox box = octant.Box;
v = camera.GetVisibility( box );
}
// if the octant is visible, or if it's the root node...
if ( v != Visibility.None )
{
//Add stuff to be rendered;
bool vis = true;
foreach ( PCZSceneNode sn in octant.NodeList.Values )
{
// if the scene node is already visible, then we can skip it
if ( sn.LastVisibleFrame != mLastVisibleFrame ||
sn.LastVisibleFromCamera != camera )
{
// if this octree is partially visible, manually cull all
// scene nodes attached directly to this level.
if ( v == Visibility.Partial )
{
vis = camera.IsObjectVisible( sn.WorldAABB );
}
if ( vis )
{
// add the node to the render queue
sn.AddToRenderQueue( camera, queue, onlyShadowCasters, visibleBounds );
// add it to the list of visible nodes
visibleNodeList.Add( sn );
// if we are displaying nodes, add the node renderable to the queue
if ( displayNodes )
{
queue.AddRenderable( sn.GetDebugRenderable() );
}
// if the scene manager or the node wants the bounding box shown, add it to the queue
if ( sn.ShowBoundingBox || showBoundingBoxes )
{
sn.AddBoundingBoxToQueue( queue );
}
// flag the node as being visible this frame
sn.LastVisibleFrame = mLastVisibleFrame;
sn.LastVisibleFromCamera = camera;
}
}
}
Octree child;
bool childfoundvisible = ( v == Visibility.Full );
if ( ( child = octant.Children[ 0, 0, 0 ] ) != null )
WalkOctree( camera, ref visibleNodeList, queue, child, visibleBounds, childfoundvisible,
onlyShadowCasters, displayNodes, showBoundingBoxes );
if ( ( child = octant.Children[ 1, 0, 0 ] ) != null )
WalkOctree( camera, ref visibleNodeList, queue, child, visibleBounds, childfoundvisible,
onlyShadowCasters, displayNodes, showBoundingBoxes );
if ( ( child = octant.Children[ 0, 1, 0 ] ) != null )
WalkOctree( camera, ref visibleNodeList, queue, child, visibleBounds, childfoundvisible,
onlyShadowCasters, displayNodes, showBoundingBoxes );
if ( ( child = octant.Children[ 1, 1, 0 ] ) != null )
WalkOctree( camera, ref visibleNodeList, queue, child, visibleBounds, childfoundvisible,
onlyShadowCasters, displayNodes, showBoundingBoxes );
if ( ( child = octant.Children[ 0, 0, 1 ] ) != null )
WalkOctree( camera, ref visibleNodeList, queue, child, visibleBounds, childfoundvisible,
onlyShadowCasters, displayNodes, showBoundingBoxes );
if ( ( child = octant.Children[ 1, 0, 1 ] ) != null )
WalkOctree( camera, ref visibleNodeList, queue, child, visibleBounds, childfoundvisible,
onlyShadowCasters, displayNodes, showBoundingBoxes );
if ( ( child = octant.Children[ 0, 1, 1 ] ) != null )
WalkOctree( camera, ref visibleNodeList, queue, child, visibleBounds, childfoundvisible,
onlyShadowCasters, displayNodes, showBoundingBoxes );
if ( ( child = octant.Children[ 1, 1, 1 ] ) != null )
WalkOctree( camera, ref visibleNodeList, queue, child, visibleBounds, childfoundvisible,
onlyShadowCasters, displayNodes, showBoundingBoxes );
}
}
public void Resize( AxisAlignedBox box )
{
// delete the octree
rootOctree = null;
// create a new octree
rootOctree = new Octree( this, null );
// set the octree bounding box
rootOctree.Box = box;
Vector3 min = box.Minimum;
Vector3 max = box.Maximum;
rootOctree.HalfSize = ( max - min ) * 0.5f;
OctreeZoneData ozd;
foreach ( PCZSceneNode on in mHomeNodeList )
{
ozd = (OctreeZoneData)( on.GetZoneData( this ) );
ozd.Octant = null;
UpdateNodeOctant( ozd );
}
foreach ( PCZSceneNode on in mVisitorNodeList )
{
ozd = (OctreeZoneData)( on.GetZoneData( this ) );
ozd.Octant = null;
UpdateNodeOctant( ozd );
}
}
