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Mesh | |
MeshOctTreeNode class represents one node in a MeshOctTree data structure.
Each node represents its part of the 3D space that is defined by the BoundingBox.
The node contains triangles that can be fully fitted into node's BoundingBox (and do not find in any of the child nodes).
Each node (except the nodes on the MaxNodeLevel) can have up to 8 child MeshOctTreeNodes (number can be lower in case some nodes does not contain any triangles).
Inheritance HierarchyNamespace: Ab3d.DirectX
Assembly: Ab3d.DXEngine (in Ab3d.DXEngine.dll) Version: 7.1.9105.2048 (1.0.0.0)
SyntaxC#
public class MeshOctTreeNode
The MeshOctTreeNode type exposes the following members.
Constructors| Name | Description | |
|---|---|---|
 | MeshOctTreeNode | Creates an instance of MeshOctTreeNode |
Methods| Name | Description | |
|---|---|---|
| AddTriangle | Adds a triangle with the specified triangleBoundingBox and index to this or any child node. |
 | CollectBoundingBoxesInLevel | CollectBoundingBoxesInLevel is a diagnostics method and fills the boundingBoxes list with bounding boxes from child nodes. |
| CollectNodesCountInLevel | CollectNodesCountInLevel is a diagnostics method and returns the number of nodes (MeshOctTreeNode objects) in the specified targetNodeLevel level. |
| CollectNodesTrianglesCountInLevel | CollectNodesTrianglesCountInLevel is a diagnostics method and fills a list of triangles count as int values with number of triangles in each node |
| GetAllHitResults | Hit test a ray against the triangles in this and child MeshOctTreeNodes and adds all hit result int the specified hitResults list. |
| GetTrianglesCountInLevel | Gets number of triangles in the specified node and its child nodes. |
| HitTest | Hit test a ray against the triangles in this and child MeshOctTreeNodes and returns the closest hit result. |
| Optimize | Optimize method optimizes this oct tree node and its child nodes. It is possible to remove empty child nodes and in case of a single child node move its triangles to this node. This method is automatically called from the MeshOctTree constructor. |
Fields| Name | Description | |
|---|---|---|
 | ActualBoundingBox | Bounding box created from actually containing positions |
| ChildNodes | List of child MeshOctTreeNode objects. The number of child MeshOctTreeNode objects can be lower then 8 when Optimize(Boolean, Boolean) method is called to remove empty MeshOctTreeNode objects. |
| HasChildTriangles | Boolean value that specifies if this MeshOctTree has any child triangles (set to true the first time the AddTriangle(Int32, BoundingBox) method is called). |
| NodeBoundingBox | BoundingBox of this node (calculated as 1/8 part of its parent) |
| NodeLevel | level of this node (level 1 is the first level) |
| ParentMashOctTree | Parent MeshOctTree |
| TriangleIndexes | List of triangle indexes that are contained in this MeshOctTreeNode. To get the index of triangle indice in the TriangleIndicesArray, multiplying the values from this list with 3. |
See Also