public static void DumpTree(BspNode inNode)
{
Debug.Log("Node...");
Debug.Log("Planar Nodes");
BspNode planar = inNode.planar;
while (planar != null)
{
Debug.Log("Planar Node");
planar = planar.planar;
}
if (inNode.front != null)
{
Debug.Log("FrontSide");
DumpTree(inNode.front);
}
if (inNode.back != null)
{
Debug.Log("BackSide");
DumpTree(inNode.back);
}
}
//
public static void GetFaces(BspNode inNode, List <Face> outFaces)
{
while (inNode != null)
{
// if we are not destroyed
if ((inNode.flags & BspNode.BspFlags_IsDestroyed) == 0)
{
// add to array list
outFaces.Add(inNode.face);
}
if (inNode.front != null)
{
GetFaces(inNode.front, outFaces);
}
if (inNode.back != null)
{
GetFaces(inNode.back, outFaces);
}
// get to the next planar node
inNode = inNode.planar;
}
}
public override void Initialize(int index, int id, int size, byte[] data,
Dictionary <int, WldFragment> fragments,
Dictionary <int, string> stringHash, ILogger logger)
{
base.Initialize(index, id, size, data, fragments, stringHash, logger);
var reader = new BinaryReader(new MemoryStream(data));
Name = stringHash[-reader.ReadInt32()];
int nodeCount = reader.ReadInt32();
Nodes = new List <BspNode>();
for (int i = 0; i < nodeCount; ++i)
{
var node = new BspNode()
{
NormalX = reader.ReadSingle(),
NormalY = reader.ReadSingle(),
NormalZ = reader.ReadSingle(),
SplitDistance = reader.ReadSingle(),
RegionId = reader.ReadInt32(),
LeftNode = reader.ReadInt32(),
RightNode = reader.ReadInt32()
};
Nodes.Add(node);
}
}
public static BspNode AddNode(BspNode inParent, BspNode.EBspLocation inLocation, Face inFace, int inFlags)
{
BspNode newNode = new BspNode();
newNode.plane = inFace.GetPlane();
newNode.face = inFace;
newNode.front = newNode.back = newNode.planar = null;
newNode.flags = inFlags;
if (inLocation == BspNode.EBspLocation.BspLocation_Front)
{
// check that front node is null
inParent.front = newNode;
}
else if (inLocation == BspNode.EBspLocation.BspLocation_Back)
{
// TODO: check that back node is null
inParent.back = newNode;
}
else if (inLocation == BspNode.EBspLocation.BspLocation_Planar)
{
// go to the last planar node
BspNode lastPlanar = inParent;
while (lastPlanar.planar != null)
{
lastPlanar = lastPlanar.planar;
}
// add planar node
lastPlanar.planar = newNode;
}
return(newNode);
}
private void ExecuteSplitFinalization()
{
WorkItem currentWorkItem = workItems.Pop();
BspNode parentNode = currentWorkItem.Node;
BspNode leftChild = new BspNode();
BspNode rightChild = new BspNode();
parentNode.SetChildren(leftChild, rightChild);
parentNode.Splitter = SplitCalculator.States.BestSplitter;
List <BspSegment> rightSegs = Partitioner.States.RightSegments;
List <BspSegment> leftSegs = Partitioner.States.LeftSegments;
rightSegs.AddRange(MinisegCreator.States.Minisegs);
leftSegs.AddRange(MinisegCreator.States.Minisegs);
string path = currentWorkItem.BranchPath;
if (BspConfig.BranchRight)
{
workItems.Push(new WorkItem(leftChild, leftSegs, path + "L"));
workItems.Push(new WorkItem(rightChild, rightSegs, path + "R"));
}
else
{
workItems.Push(new WorkItem(rightChild, rightSegs, path + "R"));
workItems.Push(new WorkItem(leftChild, leftSegs, path + "L"));
}
LoadNextWorkItem();
}
public static IEnumerable <int> GetNodeLeafs(ValveBspFile bsp, BspNode node)
{
if (node.ChildA.IsLeaf)
{
yield return(node.ChildA.Index);
}
else
{
foreach (var leaf in GetNodeLeafs(bsp, bsp.Nodes[node.ChildA.Index]))
{
yield return(leaf);
}
}
if (node.ChildB.IsLeaf)
{
yield return(node.ChildB.Index);
}
else
{
foreach (var leaf in GetNodeLeafs(bsp, bsp.Nodes[node.ChildB.Index]))
{
yield return(leaf);
}
}
}
public static void DumpTree( BspNode inNode )
{
Debug.Log( "Node..." );
Debug.Log( "Planar Nodes" );
BspNode planar = inNode.planar;
while( planar != null )
{
Debug.Log( "Planar Node" );
planar = planar.planar;
}
if( inNode.front != null )
{
Debug.Log( "FrontSide" );
DumpTree( inNode.front );
}
if( inNode.back != null )
{
Debug.Log( "BackSide" );
DumpTree( inNode.back );
}
}
/// <summary>
/// Combine this mesh with another.
/// </summary>
/// <param name="anotherMesh">Another mesh.</param>
/// <seealso cref="ConstructiveSolidGeometry.Union"/>
public virtual void Combine(IMesh anotherMesh)
{
BspNode <SplittableTriangle> a = this.ToBspTree();
BspNode <SplittableTriangle> b = anotherMesh.ToBspTree();
a.Unite(b);
this.SetBsp(a);
}
/// <summary>
/// Creates a new work item that can be operated on in a BSP pass.
/// </summary>
/// <param name="node">The node to be operated on.</param>
/// <param name="segments">The list of segments for this work item.
/// </param>
/// <param name="branchPath">The path taken to get here. This should be
/// upper case.</param>
public WorkItem(BspNode node, List <BspSegment> segments, string branchPath = "")
{
Debug.Assert(segments.Count > 0, "Should never have zero segments for a work item");
Debug.Assert(branchPath == branchPath.ToUpper(), "Should be using upper case BSP branch paths");
Node = node;
Segments = segments;
BranchPath = branchPath;
}
/// <summary>
/// Subtracts another mesh from this one.
/// </summary>
/// <param name="anotherMesh">Another mesh.</param>
/// <seealso cref="ConstructiveSolidGeometry.Subtract"/>
public virtual void Subtract(IMesh anotherMesh)
{
BspNode <SplittableTriangle> a = this.ToBspTree();
BspNode <SplittableTriangle> b = anotherMesh.ToBspTree();
a.Invert();
a.Unite(b);
a.Invert();
this.SetBsp(a);
}
//
private void PerformFaces(BspNode inRoot, List <CSGFace> inFaces)
{
for (int i = 0; i < inFaces.Count; ++i)
{
OperationInfo info;
InitializeOper(out info);
PerformNode(inRoot, inFaces[i] as CSGFace, SIDE_Outside, info);
}
}
private void PerformTree(BspNode inNode, BspNode inOtherRoot)
{
while (inNode != null)
{
// if we are new, stop processing our node...
if ((inNode.flags & BspNode.BspFlags_IsNew) != 0)
{
return;
}
// if we are not destroyed
if ((inNode.flags & BspNode.BspFlags_IsDestroyed) == 0)
{
OperationInfo info;
InitializeOper(out info);
// save current node
currentNode = inNode;
// find last coplanar node
BspNode lastPlanar = inNode;
while (lastPlanar.planar != null)
{
lastPlanar = lastPlanar.planar;
}
// perform nodes face with other tree
PerformNode(inOtherRoot, inNode.face, SIDE_Outside, info);
// nobody removed us
if ((inNode.flags & BspNode.BspFlags_IsDestroyed) == 0)
{
// remove all planar nodes added (if any)
lastPlanar.planar = null;
}
}
// process front node
if (inNode.front != null)
{
PerformTree(inNode.front, inOtherRoot);
}
// process back node
if (inNode.back != null)
{
PerformTree(inNode.back, inOtherRoot);
}
// process next planar node
inNode = inNode.planar;
}
}
//
void RouteOper(BspNode inNode, CSGFace inFace, EPolySide inSide, OperationInfo info)
{
if (processState == EProcessState.Process_Master)
{
csgVisitor.ProcessMaster(this, inFace, inSide, info);
}
else
{
csgVisitor.ProcessSlave(this, inFace, inSide, info);
}
}
public static BspNode ReadBspNode(this BinaryReader br)
{
var result = new BspNode();
result.plane = br.ReadInt32();
result.frontChild = br.ReadInt16();
result.backChild = br.ReadInt16();
br.BaseStream.Position += 16;
return(result);
}
private Collision CheckNode(int nodeIdx, Point3D start, Vector movement, float startFraction, float endFraction, float sphere)
{
// calculate start and end point
Point3D s = start + movement * startFraction;
Point3D e = start + movement * endFraction;
// if this node is a leaf, check for collision within that leaf
if (nodeIdx < 0)
{
return(CheckLeaf(~nodeIdx, start, movement, startFraction, endFraction, sphere));
}
// get node
BspNode node = Nodes[nodeIdx];
// get splitting plane
Plane plane = Planes[node.plane];
// calculate distance of start and end point to plane
float ds = plane.Distance(s);
float de = plane.Distance(e);
if (ds > sphere && de > sphere)
{
// both points are in front of the plane
return(CheckNode(node.frontChild, start, movement, startFraction, endFraction, sphere));
}
else if (ds < -sphere && de < -sphere)
{
// both points are behind the plane
return(CheckNode(node.backChild, start, movement, startFraction, endFraction, sphere));
}
else
{
float f1, f2;
float ads = System.Math.Abs(ds);
float ade = System.Math.Abs(de);
float ad = ads + ade;
float frac = endFraction - startFraction;
f1 = frac * (ads + sphere) / ad + collisionMargin;
f2 = frac * (ade + sphere) / ad + collisionMargin;
Collision c1 = CheckNode(node.frontChild, start, movement, startFraction, startFraction + f1, sphere);
Collision c2 = CheckNode(node.backChild, start, movement, endFraction - f2, endFraction, sphere);
return(ClosestCollision(c1, c2));
}
}
/// <summary>
/// Sets this mesh to value based on given BSP tree.
/// </summary>
/// <param name="tree">Root node of the BSP tree.</param>
public override void SetBsp(BspNode <SplittableTriangle> tree)
{
// Calculate capacities.
// Create vertex pool.
List <SplittableTriangle> triangles = tree.AllElements;
List <MeshVertex> vertexes = new List <MeshVertex>(triangles.Count * 3);
Action <MeshVertex> registerVertex = delegate(MeshVertex vertex)
{
int index = vertexes.BinarySearch(vertex);
if (index < 0)
{
vertexes.Insert(~index, vertex);
}
};
for (int i = 0; i < triangles.Count; i++)
{
registerVertex(triangles[i].First);
registerVertex(triangles[i].Second);
registerVertex(triangles[i].Third);
}
// Assign faces.
this.faces.Capacity = triangles.Count;
for (int i = 0; i < triangles.Count; i++)
{
this.faces[i] = new IndexedTriangleFace
{
Indices = new Int32Vector3
(
vertexes.BinarySearch(triangles[i].First),
vertexes.BinarySearch(triangles[i].Second),
vertexes.BinarySearch(triangles[i].Third)
)
};
}
// Assign vertex-related data.
this.positions.Capacity = vertexes.Count;
for (int i = 0; i < vertexes.Count; i++)
{
MeshVertex vertex = vertexes[i];
this.positions[i] = vertex.Position;
this.normals[i] = vertex.Normal;
this.texCoords[i] = vertex.UvMapPosition;
this.colors0[i] = vertex.PrimaryColor;
this.colors1[i] = vertex.SecondaryColor;
}
}
/// <summary>
/// Intersects this mesh with another.
/// </summary>
/// <param name="anotherMesh">Another mesh.</param>
/// <seealso cref="ConstructiveSolidGeometry.Intersection"/>
public virtual void Intersect(IMesh anotherMesh)
{
BspNode <SplittableTriangle> a = this.ToBspTree();
BspNode <SplittableTriangle> b = anotherMesh.ToBspTree();
a.Invert(); // Cut geometry that is not common for the meshes.
b.CutTreeOut(a); //
b.Invert(); //
a.CutTreeOut(b); //
// Clean up remains.
b.CutTreeOut(a);
// Combine geometry.
a.AddElements(b.AllElements);
// Invert everything.
a.Invert();
this.SetBsp(a);
}
public void Split(int minimumRoomSize)
{
int direction = -1;
if (Size.Width > Size.Height)
{
direction = 0;
}
else if (Size.Height > Size.Width)
{
direction = 1;
}
else
{
direction = Program.Game.Random.Next(2);
}
if (direction == 0)
{
var childRoomWidth = (Size.Width / 2) + Program.Game.Random.Next(-3, 4);
if (childRoomWidth >= minimumRoomSize && Size.Width - childRoomWidth >= minimumRoomSize)
{
ChildA = new BspNode(this, new Rectangle(Size.Left, Size.Top, childRoomWidth, Size.Height));
ChildA.Split(minimumRoomSize);
ChildB = new BspNode(this, new Rectangle(Size.Left + childRoomWidth, Size.Top, Size.Width - childRoomWidth, Size.Height));
ChildB.Split(minimumRoomSize);
}
}
else
{
var childRoomHeight = (Size.Height / 2) + Program.Game.Random.Next(-3, 4);
if (childRoomHeight >= minimumRoomSize && Size.Height - childRoomHeight >= minimumRoomSize)
{
ChildA = new BspNode(this, new Rectangle(Size.Left, Size.Top, Size.Width, childRoomHeight));
ChildA.Split(minimumRoomSize);
ChildB = new BspNode(this, new Rectangle(Size.Left, Size.Top + childRoomHeight, Size.Width, Size.Height - childRoomHeight));
ChildB.Split(minimumRoomSize);
}
}
}
//
public void Perform(ECsgOperation inOper, CSGObject inMaster, CSGObject inSlave)
{
// we are processing our slave faces
processState = EProcessState.Process_Slave;
// process faces against master tree
PerformFaces(inMaster.rootNode, inSlave.faces);
// process face from master tree
processState = EProcessState.Process_Master;
// perform master faces on slave bsp tree
PerformTree(inMaster.rootNode, inSlave.rootNode);
// check if how do we need to process generated faces
if (inOper == ECsgOperation.CsgOper_Additive || inOper == ECsgOperation.CsgOper_Subtractive)
{
// add deferred faces to master tree...
for (int i = 0; i < deferredFaces.Count; i++)
{
CSGFace defFace = ((DeferredFace)deferredFaces[i]).face;
BspNode startNode = ((DeferredFace)deferredFaces[i]).node;
// testing
startNode = inMaster.rootNode;
// add node to master tree
BspGen.AddNodeRecursive(startNode, defFace, BspNode.BspFlags_IsNew);
}
}
else
{
// clear old faces list
inMaster.faces.Clear();
// copy created faces
for (int i = 0; i < deferredFaces.Count; i++)
{
inMaster.faces.Add(deferredFaces[i].face);
}
}
// clear deferred faces
deferredFaces.Clear();
}
public static void FacesFromNodes( BspNode inNode, List<Face> outFaces )
{
while( inNode != null )
{
if( (inNode.flags & BspNode.BspFlags_IsDestroyed) == 0 )
{
outFaces.Add( inNode.face );
}
if( inNode.front != null )
FacesFromNodes( inNode.front, outFaces );
if( inNode.back != null )
FacesFromNodes( inNode.back, outFaces );
//
inNode = inNode.planar;
}
}
public override Map Generate(int width, int height)
{
var map = new Map(width, height);
rooms = new List <Rectangle>();
var entireMap = new Rectangle(0, 0, map.Width, map.Height);
var root = new BspNode(null, entireMap);
root.Split(MinimumRoomSize);
CreateRooms(root, map);
var spawnRoom = root.GetRoom();
Program.Game.Player.X = spawnRoom.Center.X;
Program.Game.Player.Y = spawnRoom.Center.Y;
var stairsRoom = rooms.Last();
var stairs = ItemFactory.CreateStairs(stairsRoom.Center.X, stairsRoom.Center.Y, Program.Game.DungeonLevel);
Program.Game.Entities.Add(stairs);
foreach (var room in rooms)
{
// Don't spawn monsters in the player's room.
if (room != spawnRoom)
{
SpawnMonsters(room);
}
SpawnItems(map, room);
}
return(map);
}
//
public BspNode GenerateBspTree( List<Face> inFaces )
{
if( inFaces == null )
{
Debug.Log("Not able to create Tree with no Faces");
return null;
}
Debug.Log( "Building Bsp Tree for " + inFaces.Count + " Faces" );
// create root node
BspNode root = new BspNode();
// partition all faces
Partition( root, inFaces );
// copy bsp faces back to array list (resulting faces...)
GetFaces( root, inFaces );
Debug.Log( "Resulting in " + inFaces.Count + " Faces" );
// result
return root;
}
public static void FacesFromNodes(BspNode inNode, List <CSGFace> outFaces)
{
while (inNode != null)
{
if ((inNode.flags & BspNode.BspFlags_IsDestroyed) == 0)
{
outFaces.Add(inNode.face);
}
if (inNode.front != null)
{
FacesFromNodes(inNode.front, outFaces);
}
if (inNode.back != null)
{
FacesFromNodes(inNode.back, outFaces);
}
//
inNode = inNode.planar;
}
}
//
public BspNode GenerateBspTree(List <Face> inFaces)
{
if (inFaces == null)
{
Debug.Log("Not able to create Tree with no Faces");
return(null);
}
Debug.Log("Building Bsp Tree for " + inFaces.Count + " Faces");
// create root node
BspNode root = new BspNode();
// partition all faces
Partition(root, inFaces);
// copy bsp faces back to array list (resulting faces...)
GetFaces(root, inFaces);
Debug.Log("Resulting in " + inFaces.Count + " Faces");
// result
return(root);
}
public static void Serialize(SerializingContainer2 sc, ref BspNode node)
{
if (sc.IsLoading)
{
node = new BspNode();
}
sc.Serialize(ref node.Plane);
sc.Serialize(ref node.iVertPool);
sc.Serialize(ref node.iSurf);
sc.Serialize(ref node.iVertexIndex);
sc.Serialize(ref node.ComponentIndex);
sc.Serialize(ref node.ComponentNodeIndex);
sc.Serialize(ref node.ComponentElementIndex);
sc.Serialize(ref node.iBack);
sc.Serialize(ref node.iFront);
sc.Serialize(ref node.iPlane);
sc.Serialize(ref node.iCollisionBound);
sc.Serialize(ref node.iZone0);
sc.Serialize(ref node.iZone1);
sc.Serialize(ref node.NumVertices);
sc.Serialize(ref node.NodeFlags);
sc.Serialize(ref node.iLeaf0);
sc.Serialize(ref node.iLeaf1);
}
public static void MergeCoplanars( BspNode inNode )
{
// proceed front nodes
if( inNode.front != null )
MergeCoplanars( inNode.front );
// proceed back nodes
if( inNode.back != null )
MergeCoplanars( inNode.back );
// first try to merge other co planar nodes
if( inNode.planar != null )
MergeCoplanars( inNode.planar );
//
bool tryToMerge = (inNode.flags & BspNode.BspFlags_IsDestroyed) == 0;
while( tryToMerge )
{
// get planar node
BspNode planarNode = inNode.planar;
// assume we are done
tryToMerge = false;
// get through all planar nodes
while( planarNode != null )
{
// if we are destroyed, proceed to next
if( (planarNode.flags & BspNode.BspFlags_IsDestroyed) != 0 )
{
// proceed to next
planarNode = planarNode.planar;
continue;
}
Face thisFace = inNode.face;
Face otherFace = planarNode.face;
// are we facing the same direction
if( Vector3.Dot( thisFace.GetPlane().normal, otherFace.GetPlane().normal ) > 0.995f )
{
// result
Face merged;
//
if( thisFace.Merge( otherFace, out merged ) )
{
// replace this face with merged
thisFace = merged;
// set other node as destroyed
planarNode.flags |= BspNode.BspFlags_IsDestroyed;
// retry to merge
tryToMerge = true;
}
}
// proceed to next
planarNode = planarNode.planar;
}
}
}
public BspNode(BspNode parent, Rectangle size)
{
Parent = parent;
Size = size;
}
//
public static void GetFaces( BspNode inNode, List<Face> outFaces )
{
while( inNode != null )
{
// if we are not destroyed
if( (inNode.flags & BspNode.BspFlags_IsDestroyed) == 0 )
{
// add to array list
outFaces.Add( inNode.face );
}
if( inNode.front != null )
{
GetFaces( inNode.front, outFaces );
}
if( inNode.back != null )
{
GetFaces( inNode.back, outFaces );
}
// get to the next planar node
inNode = inNode.planar;
}
}
/// <summary> /// When implemented, changes this mesh to be perfect representation of the given BSP tree. /// </summary> /// <param name="tree">BSP tree to convert to this mesh.</param> public abstract void SetBsp(BspNode <SplittableTriangle> tree);
private void PerformNode(BspNode inNode, CSGFace inFace, int nodeSide, OperationInfo info)
{
while (inNode != null)
{
CSGFace.EPlaneSide side = inFace.Side(inNode.plane);
switch (side)
{
case CSGFace.EPlaneSide.Side_Front:
//
nodeSide = nodeSide | (inNode.IsCsg() ? 1 : 0);
// leaf node
if (inNode.front == null)
{
// set operation infos
info.leafNode = inNode;
info.leafLocation = BspNode.EBspLocation.BspLocation_Front;
// we are done, process face
ProcessFace(inFace, SIDE_Outside, info);
}
// get to next front node (if any)
inNode = inNode.front;
break;
case CSGFace.EPlaneSide.Side_Back:
int backSide = inNode.IsCsg() ? 0 : 1;
//
nodeSide = nodeSide & backSide;
// leaf node
if (inNode.back == null)
{
// set leaf infos
info.leafNode = inNode;
info.leafLocation = BspNode.EBspLocation.BspLocation_Back;
// we are done, process face
ProcessFace(inFace, SIDE_Inside, info);
}
// get to next front node (if any)
inNode = inNode.back;
break;
case CSGFace.EPlaneSide.Side_Split:
// split face and process front and back
CSGFace frontFace, backFace;
//
inFace.Split(inNode.plane, out frontFace, out backFace);
// TODO: set polygon cutted flags
frontFace.flags |= CSGFace.FaceFlags_WasCutted;
backFace.flags |= CSGFace.FaceFlags_WasCutted;
// front node is a leaf node
if (inNode.front == null)
{
//
info.leafNode = inNode;
info.leafLocation = BspNode.EBspLocation.BspLocation_Front;
ProcessFace(frontFace, SIDE_Outside, info);
}
else
{
PerformNode(inNode.front, frontFace, nodeSide, info);
}
// Prcess back node with back face
if (inNode.back == null)
{
//
info.leafNode = inNode;
info.leafLocation = BspNode.EBspLocation.BspLocation_Back;
ProcessFace(backFace, SIDE_Inside, info);
}
else
{
// process back node with new face
PerformNode(inNode.back, backFace, nodeSide, info);
}
// stop loop
inNode = null;
break;
case CSGFace.EPlaneSide.Side_Planar:
BspNode front, back;
if (info.wasPlanar == true)
{
Debug.Log("Reentering Planar Nodes!");
}
// set operation infos
info.wasPlanar = true;
info.backNode = null;
info.processingBack = false;
if (Vector3.Dot(inFace.GetPlane().normal, inNode.plane.normal) >= 0.0f)
{
// same order as we face in the same order
front = inNode.front;
back = inNode.back;
// we are for now outside (as we are looking outside)
info.planarSide = SIDE_Outside;
}
else
{
// reverse order as we are facing in the opposite direction
front = inNode.back;
back = inNode.front;
// we are now inside as we are looking to the inside
info.planarSide = SIDE_Inside;
}
// we are leaf node (coplanar face)
if (front == null && back == null)
{
// set leaf stuff
info.leafNode = inNode;
info.leafLocation = BspNode.EBspLocation.BspLocation_Planar;
// process node
info.processingBack = true;
// process face
ProcessFace(inFace, InverseSide(info.planarSide), info);
// stop loop
inNode = null;
}
else if (front == null && back != null)
{
// only back nodes
info.processingBack = true;
// process back
inNode = back;
}
else
{
// tread like we were on front side (maybe we do have a back node)
info.processingBack = false;
// remember back node
info.backNode = back;
// process front
inNode = front;
}
break;
}
}
}
/// <summary>
/// Combines two BSP trees using a specified CSG operation
/// </summary>
private static BspNode Combine( Operation op, BspNode set0, BspNode set1 )
{
IList< Edge > set0Edges = Flatten( set0 );
IList< Edge > set1Edges = Flatten( set1 );
List< Edge > sourceEdges = new List<Edge>( );
switch ( op )
{
case Operation.Union :
Clip( true, false, set0, set1Edges, sourceEdges );
Clip( true, false, set1, set0Edges, sourceEdges );
break;
case Operation.EdgeUnion :
Clip( false, true, set0, set1Edges, sourceEdges );
foreach ( Edge edge in sourceEdges )
{
edge.DoubleSided = true;
}
sourceEdges.AddRange( set0Edges );
break;
case Operation.Intersection :
Clip( false, true, set0, set1Edges, sourceEdges );
Clip( false, true, set1, set0Edges, sourceEdges );
break;
case Operation.Complement :
Clip( false, true, set0, set1Edges, sourceEdges );
Clip( false, true, set1, set0Edges, sourceEdges );
break;
}
sourceEdges = MergeEdges( sourceEdges );
BspNode rootNode = BuildNode( null, sourceEdges );
return rootNode;
}
/// <summary>
/// Builds a BSP node from a list of edges
/// </summary>
private static BspNode BuildNode( BspNode parentNode, IList< Edge > edges )
{
if ( edges.Count == 0 )
{
return null;
}
Edge splitter = edges[ 0 ]; // TODO: AP: Choose better splitter
BspNode splitNode = new BspNode( parentNode, splitter );
if ( edges.Count == 1 )
{
return splitNode;
}
// Classify edges as left or right edges
List< Edge > outsideEdges = new List< Edge >( );
List< Edge > insideEdges = new List< Edge >( );
for ( int edgeIndex = 1; edgeIndex < edges.Count; ++edgeIndex )
{
ClassifyEdge( splitter, edges[ edgeIndex ], outsideEdges, insideEdges );
}
// Build BSP subtrees from left and right edges
if ( outsideEdges.Count > 0 )
{
splitNode.Behind = BuildNode( splitNode, outsideEdges );
}
if ( insideEdges.Count > 0 )
{
splitNode.InFront = BuildNode( splitNode, insideEdges );
}
return splitNode;
}
/// <summary>
/// Flattens a BSP tree into a list of edges
/// </summary>
private static void Flatten( BspNode root, IList< Edge > edges )
{
if ( !root.Edge.Temporary )
{
edges.Add( root.Edge );
}
if ( root.Behind != null )
{
Flatten( root.Behind, edges );
}
if ( root.InFront != null )
{
Flatten( root.InFront, edges );
}
}
/// <summary>
/// Sets this mesh to value based on given BSP tree.
/// </summary>
/// <param name="tree">Root node of the BSP tree.</param>
public override void SetBsp(BspNode<SplittableTriangle> tree)
{
// Calculate capacities.
// Create vertex pool.
List<SplittableTriangle> triangles = tree.AllElements;
List<MeshVertex> vertexes = new List<MeshVertex>(triangles.Count * 3);
Action<MeshVertex> registerVertex = delegate(MeshVertex vertex)
{
int index = vertexes.BinarySearch(vertex);
if (index < 0)
{
vertexes.Insert(~index, vertex);
}
};
for (int i = 0; i < triangles.Count; i++)
{
registerVertex(triangles[i].First);
registerVertex(triangles[i].Second);
registerVertex(triangles[i].Third);
}
// Assign faces.
this.faces.Capacity = triangles.Count;
for (int i = 0; i < triangles.Count; i++)
{
this.faces[i] = new IndexedTriangleFace
{
Indices = new Int32Vector3
(
vertexes.BinarySearch(triangles[i].First),
vertexes.BinarySearch(triangles[i].Second),
vertexes.BinarySearch(triangles[i].Third)
)
};
}
// Assign vertex-related data.
this.positions.Capacity = vertexes.Count;
for (int i = 0; i < vertexes.Count; i++)
{
MeshVertex vertex = vertexes[i];
this.positions[i] = vertex.Position;
this.normals[i] = vertex.Normal;
this.texCoords[i] = vertex.UvMapPosition;
this.colors0[i] = vertex.PrimaryColor;
this.colors1[i] = vertex.SecondaryColor;
}
}
//
void Partition( BspNode inNode, List<Face> inFaces )
{
List<Face> frontFaces = new List<Face>();
List<Face> backFaces = new List<Face>();
Face nodeFace;
// find best splitter plane for this
bool ret = FindSplitter( inFaces, out nodeFace );
// return has to be true!!!
if( ret == false )
{
Debug.DebugBreak();
Debug.Log("Error processing Mesh!");
return;
}
// setup node
inNode.front = null;
inNode.back = null;
inNode.planar = null;
inNode.face = nodeFace;
inNode.plane = nodeFace.GetPlane();
// split remaining faces into lists
for( int i = 0; i < inFaces.Count; ++i )
{
// get face
Face face = inFaces[i] as Face;
// do not process our self
if( face == nodeFace )
continue;
Face.EPlaneSide side = face.Side( inNode.plane );
switch( side )
{
case Face.EPlaneSide.Side_Front:
frontFaces.Add( face );
break;
case Face.EPlaneSide.Side_Back:
backFaces.Add( face );
break;
case Face.EPlaneSide.Side_Planar:
// get last planar node
BspNode lastPlanar = inNode;
while( lastPlanar.planar != null )
lastPlanar = lastPlanar.planar;
// create new planar node
BspNode planar = lastPlanar.planar = new BspNode();
// setup planar node
planar.front = null;
planar.back = null;
planar.planar = null;
planar.face = face;
planar.plane = face.GetPlane();
break;
case Face.EPlaneSide.Side_Split:
// TODO...
Face front, back;
// split face into two parts...
ret = face.Split( inNode.plane, out front, out back );
if( ret == false )
Debug.DebugBreak();
// add to front and back
frontFaces.Add( front );
backFaces.Add( back );
break;
}
}
// optimizing a bit, clear in array list as we do not need it any more
inFaces.Clear();
// process front faces
if( frontFaces.Count > 0 )
{
inNode.front = new BspNode();
// partition front faces
Partition( inNode.front, frontFaces );
}
// process back faces
if( backFaces.Count > 0 )
{
inNode.back = new BspNode();
// partition back faces
Partition( inNode.back, backFaces );
}
}
/// <summary>
/// Performs CSG Operation on this Object (Master) with given Slaves.
/// </summary>
/// <param name='inOper'>
/// In oper.
/// </param>
/// <param name='inSlaves'>
/// In slaves.
/// </param>
public void PerformCSG( CsgOperation.ECsgOperation inOper, GameObject[] inSlaves )
{
//
CreateFromMesh();
// create bsp generator
BspGen gen = new BspGen( GlobalSettings.BspOptimization );
rootNode = gen.GenerateBspTree( faces );
List<Face> savedFaces = new List<Face>();
//
foreach ( GameObject g in inSlaves )
{
CSGObject slave = g.GetComponent<CSGObject>();
// if we have a csg object and we are not our self
// and intersecting
if( slave && g != gameObject && intersect(slave) )
{
Debug.Log(g.name);
//
slave.CreateFromMesh();
// ....
BspGen genSlave = new BspGen( GlobalSettings.BspOptimization );
slave.rootNode = genSlave.GenerateBspTree( slave.faces );
CsgVisitor visitor = null;
switch( inOper )
{
case CsgOperation.ECsgOperation.CsgOper_Additive:
visitor = new UnionVisitor();
break;
case CsgOperation.ECsgOperation.CsgOper_Subtractive:
visitor = new SubtractiveVisitor();
break;
case CsgOperation.ECsgOperation.CsgOper_Intersect:
visitor = new IntersectVisitor();
break;
case CsgOperation.ECsgOperation.CsgOper_DeIntersect:
visitor = new DeIntersectVisitor();
break;
default:
visitor = null;
break;
}
CsgOperation oper = new CsgOperation( visitor );
oper.Perform( inOper, this, slave );
// save faces
savedFaces.AddRange( faces );
}
}
// If we want to merge Coplanars after every Operation
if( GlobalSettings.MergeCoplanars )
{
MergeFaces();
}
// for additive or subtracte operation, built faces list from bsp tree
// for others, use faces directly
if( inOper == CsgOperation.ECsgOperation.CsgOper_Additive || inOper == CsgOperation.ECsgOperation.CsgOper_Subtractive )
{
// create new face list
List<Face> newFaces = new List<Face>();
// create faces from bsp nodes
BspHelper.FacesFromNodes( rootNode, newFaces );
// copy to face list
faces = newFaces;
}
else
{
// copy saved faces
faces = savedFaces;
}
// Face.MergeCoplanars( faces );
// copy to unity structure
TransferFacesToMesh();
// dumb tree
// BspHelper.DumpTree( rootNode );
}
//
private void PerformFaces( BspNode inRoot, List<Face> inFaces )
{
for( int i = 0; i < inFaces.Count; ++i )
{
OperationInfo info;
InitializeOper( out info );
PerformNode( inRoot, inFaces[i] as Face, SIDE_Outside, info );
}
}
private void PerformTree( BspNode inNode, BspNode inOtherRoot )
{
while( inNode != null )
{
// if we are new, stop processing our node...
if( (inNode.flags & BspNode.BspFlags_IsNew) != 0 )
return;
// if we are not destroyed
if( (inNode.flags & BspNode.BspFlags_IsDestroyed) == 0 )
{
OperationInfo info;
InitializeOper( out info );
// save current node
currentNode = inNode;
// find last coplanar node
BspNode lastPlanar = inNode;
while( lastPlanar.planar != null )
lastPlanar = lastPlanar.planar;
// perform nodes face with other tree
PerformNode( inOtherRoot, inNode.face, SIDE_Outside, info );
// nobody removed us
if( (inNode.flags & BspNode.BspFlags_IsDestroyed) == 0 )
{
// remove all planar nodes added (if any)
lastPlanar.planar = null;
}
}
// process front node
if( inNode.front != null )
{
PerformTree( inNode.front, inOtherRoot );
}
// process back node
if( inNode.back != null )
{
PerformTree( inNode.back, inOtherRoot );
}
// process next planar node
inNode = inNode.planar;
}
}
/// <summary>
/// Combines a brush with the current geometry set
/// </summary>
/// <param name="op">CSG operation</param>
/// <param name="brush">Brush to add to the level geometry</param>
/// <exception cref="InvalidOperationException">Thrown by convex region builder if BSP tree is internally invalid</exception>
public void Combine( Operation op, UiPolygon brush )
{
BspNode brushBsp = Build( brush, op == Operation.Complement );
BspNode newRoot = null;
if ( m_Root == null )
{
if ( op == Operation.Union || op == Operation.EdgeUnion )
{
newRoot = brushBsp;
}
}
else
{
newRoot = Combine( op, m_Root, brushBsp );
}
if ( newRoot != null )
{
FixUpDoubleSidedNodes( newRoot );
BuildConvexRegions( newRoot );
m_Root = newRoot;
}
if ( GeometryChanged != null )
{
GeometryChanged( this, null );
}
}
/// <summary>
/// Builds the convex regions for a root node and all its children
/// </summary>
private void BuildConvexRegions( BspNode node )
{
// Find the bounding box for the tree
float[] bounds = new float[ 4 ] { float.MaxValue, float.MaxValue, float.MinValue, float.MinValue };
GetNodeBoundingRectangle( node, bounds );
// Expand bounds a bit
float boundary = 1.0f;
bounds[ 0 ] -= boundary;
bounds[ 1 ] -= boundary;
bounds[ 2 ] += boundary;
bounds[ 3 ] += boundary;
float width = bounds[ 2 ] - bounds[ 0 ];
float height = bounds[ 3 ] - bounds[ 1 ];
Tesselator tess = new Tesselator( );
Tesselator.Polygon boundingPoly = tess.CreateBoundingPolygon( bounds[ 0 ], bounds[ 1 ], width, height );
BuildConvexRegions( node, tess, boundingPoly );
m_Points = tess.Points.ToArray( );
}
/// <summary>
/// Builds the convex region for a node and its children
/// </summary>
private static void BuildConvexRegions( BspNode node, Tesselator tess, Tesselator.Polygon poly )
{
Tesselator.Polygon behindPoly;
Tesselator.Polygon inFrontPoly;
tess.Split( node.Plane, poly, out behindPoly, out inFrontPoly );
if ( node.Behind != null )
{
BuildConvexRegions( node.Behind, tess, behindPoly );
}
if ( node.InFront != null )
{
BuildConvexRegions( node.InFront, tess, inFrontPoly );
}
else
{
node.ConvexRegion = inFrontPoly.Indices;
}
}
/// <summary>
/// Sets up the node
/// </summary>
/// <param name="parent">Node parent</param>
/// <param name="edge">Node edge</param>
public BspNode( BspNode parent, Edge edge )
{
m_Parent = parent;
m_Edge = edge;
m_Quad[ 0 ] = new Point3( edge.P0.X, 0, edge.P0.Y );
m_Quad[ 1 ] = new Point3( edge.P1.X, 0, edge.P1.Y );
m_Quad[ 2 ] = new Point3( edge.P1.X, 5, edge.P1.Y );
m_Quad[ 3 ] = new Point3( edge.P0.X, 5, edge.P0.Y );
}
/// <summary>
/// Clips a set of edges against a BSP tree
/// </summary>
private static void Clip( bool keepOutsideEdges, bool keepInsideEdges, BspNode node, IEnumerable< Edge > edges, IList< Edge > outputEdges )
{
IList< Edge > outsideEdges = ( node.Behind != null ) ? new List< Edge >( ) : ( keepOutsideEdges ? outputEdges : null );
IList< Edge > insideEdges = ( node.InFront != null ) ? new List< Edge >( ) : ( keepInsideEdges ? outputEdges : null );
foreach ( Edge edge in edges )
{
ClassifyEdge( node.Edge, edge, outsideEdges, insideEdges );
}
if ( node.Behind != null )
{
Clip( keepOutsideEdges, keepInsideEdges, node.Behind, outsideEdges, outputEdges );
}
if ( node.InFront != null )
{
Clip( keepOutsideEdges, keepInsideEdges, node.InFront, insideEdges, outputEdges );
}
}
//
void RouteOper( BspNode inNode, Face inFace, EPolySide inSide, OperationInfo info )
{
if( processState == EProcessState.Process_Master )
{
csgVisitor.ProcessMaster( this, inFace, inSide, info );
}
else
{
csgVisitor.ProcessSlave( this, inFace, inSide, info );
}
}
/// <summary>
/// Flattens a BSP tree into a list of edges
/// </summary>
private static IList<Edge> Flatten( BspNode root )
{
List< Edge > edges = new List< Edge >( );
Flatten( root, edges );
return edges;
}
private void PerformNode( BspNode inNode, Face inFace, int nodeSide, OperationInfo info )
{
while( inNode != null )
{
Face.EPlaneSide side = inFace.Side( inNode.plane );
switch( side )
{
case Face.EPlaneSide.Side_Front:
//
nodeSide = nodeSide | (inNode.IsCsg() ? 1 : 0);
// leaf node
if( inNode.front == null )
{
// set operation infos
info.leafNode = inNode;
info.leafLocation = BspNode.EBspLocation.BspLocation_Front;
// we are done, process face
ProcessFace( inFace, SIDE_Outside, info );
}
// get to next front node (if any)
inNode = inNode.front;
break;
case Face.EPlaneSide.Side_Back:
int backSide = inNode.IsCsg() ? 0 : 1;
//
nodeSide = nodeSide & backSide;
// leaf node
if( inNode.back == null )
{
// set leaf infos
info.leafNode = inNode;
info.leafLocation = BspNode.EBspLocation.BspLocation_Back;
// we are done, process face
ProcessFace( inFace, SIDE_Inside, info );
}
// get to next front node (if any)
inNode = inNode.back;
break;
case Face.EPlaneSide.Side_Split:
// split face and process front and back
Face frontFace, backFace;
//
inFace.Split( inNode.plane, out frontFace, out backFace );
// TODO: set polygon cutted flags
frontFace.flags |= Face.FaceFlags_WasCutted;
backFace.flags |= Face.FaceFlags_WasCutted;
// front node is a leaf node
if( inNode.front == null )
{
//
info.leafNode = inNode;
info.leafLocation = BspNode.EBspLocation.BspLocation_Front;
ProcessFace( frontFace, SIDE_Outside, info );
}
else
{
PerformNode( inNode.front, frontFace, nodeSide, info );
}
// Prcess back node with back face
if( inNode.back == null )
{
//
info.leafNode = inNode;
info.leafLocation = BspNode.EBspLocation.BspLocation_Back;
ProcessFace( backFace, SIDE_Inside, info );
}
else
{
// process back node with new face
PerformNode( inNode.back, backFace, nodeSide, info );
}
// stop loop
inNode = null;
break;
case Face.EPlaneSide.Side_Planar:
BspNode front, back;
if( info.wasPlanar == true )
{
Debug.Log( "Reentering Planar Nodes!" );
}
// set operation infos
info.wasPlanar = true;
info.backNode = null;
info.processingBack = false;
if( Vector3.Dot( inFace.GetPlane().normal, inNode.plane.normal ) >= 0.0f )
{
// same order as we face in the same order
front = inNode.front;
back = inNode.back;
// we are for now outside (as we are looking outside)
info.planarSide = SIDE_Outside;
}
else
{
// reverse order as we are facing in the opposite direction
front = inNode.back;
back = inNode.front;
// we are now inside as we are looking to the inside
info.planarSide = SIDE_Inside;
}
// we are leaf node (coplanar face)
if( front == null && back == null )
{
// set leaf stuff
info.leafNode = inNode;
info.leafLocation = BspNode.EBspLocation.BspLocation_Planar;
// process node
info.processingBack = true;
// process face
ProcessFace( inFace, InverseSide(info.planarSide), info );
// stop loop
inNode = null;
}
else if( front == null && back != null )
{
// only back nodes
info.processingBack = true;
// process back
inNode = back;
}
else
{
// tread like we were on front side (maybe we do have a back node)
info.processingBack = false;
// remember back node
info.backNode = back;
// process front
inNode = front;
}
break;
}
}
}
/// <summary>
/// Gets a bounding rectangle that encompasses a BSP node and its children
/// </summary>
private static void GetNodeBoundingRectangle( BspNode node, float[] rect )
{
if ( node == null )
{
return;
}
rect[ 0 ] = Utils.Min( rect[ 0 ], node.Edge.P0.X, node.Edge.P1.X );
rect[ 1 ] = Utils.Min( rect[ 1 ], node.Edge.P0.Y, node.Edge.P1.Y );
rect[ 2 ] = Utils.Max( rect[ 2 ], node.Edge.P0.X, node.Edge.P1.X );
rect[ 3 ] = Utils.Max( rect[ 3 ], node.Edge.P0.Y, node.Edge.P1.Y );
GetNodeBoundingRectangle( node.Behind, rect );
GetNodeBoundingRectangle( node.InFront, rect );
}
public static BspNode AddNode( BspNode inParent, BspNode.EBspLocation inLocation, Face inFace, int inFlags )
{
BspNode newNode = new BspNode();
newNode.plane = inFace.GetPlane();
newNode.face = inFace;
newNode.front = newNode.back = newNode.planar = null;
newNode.flags = inFlags;
if( inLocation == BspNode.EBspLocation.BspLocation_Front )
{
// check that front node is null
inParent.front = newNode;
}
else if( inLocation == BspNode.EBspLocation.BspLocation_Back )
{
// TODO: check that back node is null
inParent.back = newNode;
}
else if( inLocation == BspNode.EBspLocation.BspLocation_Planar )
{
// go to the last planar node
BspNode lastPlanar = inParent;
while( lastPlanar.planar != null )
lastPlanar = lastPlanar.planar;
// add planar node
lastPlanar.planar = newNode;
}
return newNode;
}
private void FixUpDoubleSidedNodes( BspNode node )
{
if ( node == null )
{
return;
}
FixUpDoubleSidedNodes( node.Behind );
FixUpDoubleSidedNodes( node.InFront );
if ( ( node.Edge.DoubleSided ) && ( node.Behind == null ) )
{
node.Behind = new BspNode( node, node.Edge.MakeTemporaryFlippedEdge( ) );
}
}
public static BspNode AddNodeRecursive(BspNode inNode, Face inFace, int inFlags)
{
while (inNode != null)
{
Face.EPlaneSide planeSide = inFace.Side(inNode.plane);
switch (planeSide)
{
case Face.EPlaneSide.Side_Front:
if (inNode.front == null)
{
return(AddNode(inNode, BspNode.EBspLocation.BspLocation_Front, inFace, inFlags));
}
inNode = inNode.front;
break;
case Face.EPlaneSide.Side_Back:
if (inNode.back == null)
{
return(AddNode(inNode, BspNode.EBspLocation.BspLocation_Back, inFace, inFlags));
}
inNode = inNode.back;
break;
case Face.EPlaneSide.Side_Planar:
return(AddNode(inNode, BspNode.EBspLocation.BspLocation_Planar, inFace, inFlags));
case Face.EPlaneSide.Side_Split:
Face frontFace, backFace;
inFace.Split(inNode.plane, out frontFace, out backFace);
if (inNode.front == null)
{
AddNode(inNode, BspNode.EBspLocation.BspLocation_Front, frontFace, inFlags);
}
else
{
AddNodeRecursive(inNode.front, frontFace, inFlags);
}
if (inNode.back == null)
{
AddNode(inNode, BspNode.EBspLocation.BspLocation_Back, inFace, inFlags);
}
else
{
AddNodeRecursive(inNode.back, backFace, inFlags);
}
inNode = null;
break;
}
}
// happens when face get splitted...
return(null);
}
public static BspNode AddNodeRecursive( BspNode inNode, Face inFace, int inFlags )
{
while( inNode != null )
{
Face.EPlaneSide planeSide = inFace.Side( inNode.plane );
switch( planeSide )
{
case Face.EPlaneSide.Side_Front:
if( inNode.front == null )
return AddNode( inNode, BspNode.EBspLocation.BspLocation_Front, inFace, inFlags );
inNode = inNode.front;
break;
case Face.EPlaneSide.Side_Back:
if( inNode.back == null )
return AddNode( inNode, BspNode.EBspLocation.BspLocation_Back, inFace, inFlags );
inNode = inNode.back;
break;
case Face.EPlaneSide.Side_Planar:
return AddNode( inNode, BspNode.EBspLocation.BspLocation_Planar, inFace, inFlags );
case Face.EPlaneSide.Side_Split:
Face frontFace, backFace;
inFace.Split( inNode.plane, out frontFace, out backFace );
if( inNode.front == null )
{
AddNode( inNode, BspNode.EBspLocation.BspLocation_Front, frontFace, inFlags );
}
else
{
AddNodeRecursive( inNode.front, frontFace, inFlags );
}
if( inNode.back == null )
{
AddNode( inNode, BspNode.EBspLocation.BspLocation_Back, inFace, inFlags );
}
else
{
AddNodeRecursive( inNode.back, backFace, inFlags );
}
inNode = null;
break;
}
}
// happens when face get splitted...
return null;
}
//
void Partition(BspNode inNode, List <Face> inFaces)
{
List <Face> frontFaces = new List <Face>();
List <Face> backFaces = new List <Face>();
Face nodeFace;
// find best splitter plane for this
bool ret = FindSplitter(inFaces, out nodeFace);
// return has to be true!!!
if (ret == false)
{
Debug.DebugBreak();
Debug.Log("Error processing Mesh!");
return;
}
// setup node
inNode.front = null;
inNode.back = null;
inNode.planar = null;
inNode.face = nodeFace;
inNode.plane = nodeFace.GetPlane();
// split remaining faces into lists
for (int i = 0; i < inFaces.Count; ++i)
{
// get face
Face face = inFaces[i] as Face;
// do not process our self
if (face == nodeFace)
{
continue;
}
Face.EPlaneSide side = face.Side(inNode.plane);
switch (side)
{
case Face.EPlaneSide.Side_Front:
frontFaces.Add(face);
break;
case Face.EPlaneSide.Side_Back:
backFaces.Add(face);
break;
case Face.EPlaneSide.Side_Planar:
// get last planar node
BspNode lastPlanar = inNode;
while (lastPlanar.planar != null)
{
lastPlanar = lastPlanar.planar;
}
// create new planar node
BspNode planar = lastPlanar.planar = new BspNode();
// setup planar node
planar.front = null;
planar.back = null;
planar.planar = null;
planar.face = face;
planar.plane = face.GetPlane();
break;
case Face.EPlaneSide.Side_Split:
// TODO...
Face front, back;
// split face into two parts...
ret = face.Split(inNode.plane, out front, out back);
if (ret == false)
{
Debug.DebugBreak();
}
// add to front and back
frontFaces.Add(front);
backFaces.Add(back);
break;
}
}
// optimizing a bit, clear in array list as we do not need it any more
inFaces.Clear();
// process front faces
if (frontFaces.Count > 0)
{
inNode.front = new BspNode();
// partition front faces
Partition(inNode.front, frontFaces);
}
// process back faces
if (backFaces.Count > 0)
{
inNode.back = new BspNode();
// partition back faces
Partition(inNode.back, backFaces);
}
}
public static void MergeCoplanars(BspNode inNode)
{
// proceed front nodes
if (inNode.front != null)
{
MergeCoplanars(inNode.front);
}
// proceed back nodes
if (inNode.back != null)
{
MergeCoplanars(inNode.back);
}
// first try to merge other co planar nodes
if (inNode.planar != null)
{
MergeCoplanars(inNode.planar);
}
//
bool tryToMerge = (inNode.flags & BspNode.BspFlags_IsDestroyed) == 0;
while (tryToMerge)
{
// get planar node
BspNode planarNode = inNode.planar;
// assume we are done
tryToMerge = false;
// get through all planar nodes
while (planarNode != null)
{
// if we are destroyed, proceed to next
if ((planarNode.flags & BspNode.BspFlags_IsDestroyed) != 0)
{
// proceed to next
planarNode = planarNode.planar;
continue;
}
CSGFace thisFace = inNode.face;
CSGFace otherFace = planarNode.face;
// are we facing the same direction
if (Vector3.Dot(thisFace.GetPlane().normal, otherFace.GetPlane().normal) > 0.995f)
{
// result
CSGFace merged;
//
if (thisFace.Merge(otherFace, out merged))
{
// replace this face with merged
thisFace = merged;
// set other node as destroyed
planarNode.flags |= BspNode.BspFlags_IsDestroyed;
// retry to merge
tryToMerge = true;
}
}
// proceed to next
planarNode = planarNode.planar;
}
}
}
private void CreateRooms(BspNode node, Map map)
{
if (node.ChildA != null || node.ChildB != null)
{
CreateRooms(node.ChildA, map);
CreateRooms(node.ChildB, map);
if (node.ChildA != null && node.ChildB != null)
{
var roomA = node.ChildA.GetRoom();
var roomB = node.ChildB.GetRoom();
if (roomA.Left == roomB.Left || roomA.Right == roomB.Right)
{
if (roomA.Width >= roomB.Width)
{
map.CreateVerticalTunnel(roomA.Center.Y, roomB.Center.Y, roomB.Center.X, Tile.Floor);
}
else
{
map.CreateVerticalTunnel(roomA.Center.Y, roomB.Center.Y, roomA.Center.X, Tile.Floor);
}
}
else if (roomA.Top == roomB.Top || roomA.Bottom == roomB.Bottom)
{
if (roomA.Height >= roomB.Height)
{
map.CreateHorizontalTunnel(roomA.Center.X, roomB.Center.X, roomB.Center.Y, Tile.Floor);
}
else
{
map.CreateHorizontalTunnel(roomA.Center.X, roomB.Center.X, roomA.Center.Y, Tile.Floor);
}
}
else
{
if (roomA.Width >= roomB.Width)
{
map.CreateVerticalTunnel(roomA.Center.Y, roomB.Center.Y, roomB.Center.X, Tile.Floor);
}
else
{
map.CreateVerticalTunnel(roomA.Center.Y, roomB.Center.Y, roomA.Center.X, Tile.Floor);
}
if (roomA.Height >= roomB.Height)
{
map.CreateHorizontalTunnel(roomA.Center.X, roomB.Center.X, roomB.Center.Y, Tile.Floor);
}
else
{
map.CreateHorizontalTunnel(roomA.Center.X, roomB.Center.X, roomA.Center.Y, Tile.Floor);
}
}
}
}
else
{
var room = new Rectangle();
int maxShrinkX = node.Size.Width - MinimumRoomSize;
int maxShrinkY = node.Size.Height - MinimumRoomSize;
room.Width = node.Size.Width - Program.Game.Random.Next(maxShrinkX);
room.Height = node.Size.Height - Program.Game.Random.Next(maxShrinkY);
room.X = Program.Game.Random.Next(node.Size.Left, node.Size.Right - room.Width);
room.Y = Program.Game.Random.Next(node.Size.Top, node.Size.Bottom - room.Height);
node.Room = room;
rooms.Add(room);
map.CreateRoom(room, Tile.Floor);
}
}
/// <summary>
/// Performs CSG Operation on this Object (Master) with given Slaves.
/// </summary>
/// <param name='inOper'>
/// In oper.
/// </param>
/// <param name='inSlaves'>
/// In slaves.
/// </param>
public void PerformCSG(CsgOperation.ECsgOperation inOper, GameObject[] inSlaves)
{
//
CreateFromMesh();
// create bsp generator
BspGen gen = new BspGen(GlobalSettings.BspOptimization);
rootNode = gen.GenerateBspTree(faces);
List <CSGFace> savedFaces = new List <CSGFace>();
//
foreach (GameObject g in inSlaves)
{
CSGObject slave = g.GetComponent <CSGObject>();
// if we have a csg object and we are not our self
// and intersecting
if (slave && g != gameObject && intersect(slave))
{
Debug.Log(g.name);
//
slave.CreateFromMesh();
// ....
BspGen genSlave = new BspGen(GlobalSettings.BspOptimization);
slave.rootNode = genSlave.GenerateBspTree(slave.faces);
CsgVisitor visitor = null;
switch (inOper)
{
case CsgOperation.ECsgOperation.CsgOper_Additive:
visitor = new UnionVisitor();
break;
case CsgOperation.ECsgOperation.CsgOper_Subtractive:
visitor = new SubtractiveVisitor();
break;
case CsgOperation.ECsgOperation.CsgOper_Intersect:
visitor = new IntersectVisitor();
break;
case CsgOperation.ECsgOperation.CsgOper_DeIntersect:
visitor = new DeIntersectVisitor();
break;
default:
visitor = null;
break;
}
CsgOperation oper = new CsgOperation(visitor);
oper.Perform(inOper, this, slave);
// save faces
savedFaces.AddRange(faces);
}
}
// If we want to merge Coplanars after every Operation
if (GlobalSettings.MergeCoplanars)
{
MergeFaces();
}
// for additive or subtracte operation, built faces list from bsp tree
// for others, use faces directly
if (inOper == CsgOperation.ECsgOperation.CsgOper_Additive || inOper == CsgOperation.ECsgOperation.CsgOper_Subtractive)
{
// create new face list
List <CSGFace> newFaces = new List <CSGFace>();
// create faces from bsp nodes
BspHelper.FacesFromNodes(rootNode, newFaces);
// copy to face list
faces = newFaces;
}
else
{
// copy saved faces
faces = savedFaces;
}
// Face.MergeCoplanars( faces );
// copy to unity structure
TransferFacesToMesh();
// dumb tree
// BspHelper.DumpTree( rootNode );
}
/// <summary> /// When implemented, changes this mesh to be perfect representation of the given BSP tree. /// </summary> /// <param name="tree">BSP tree to convert to this mesh.</param> public abstract void SetBsp(BspNode<SplittableTriangle> tree);
