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Cell
Availability
| contact | contactGeo | contactStereo | contactGeoStereo | |
|---|---|---|---|---|
 | Available | Available | Available | Available |
 | Available | N/A | N/A | N/A |
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General
The Cells & Portals technique allows the visibility management of complex indoor environments. The Cells & Portals technique also combines several Extension nodes. Please see node definitions for Cell and Portal.
Syntax
Cell
{
eventIn MFNode addChildren
exposedField SFVec3f bboxCenter
exposedField SFVec3f bboxSize
exposedField MFNode children
exposedField SFInt32 content
exposedField MFNode portals
eventIn MFNode removeChildren
}
{
eventIn MFNode addChildren
exposedField SFVec3f bboxCenter
exposedField SFVec3f bboxSize
exposedField MFNode children
exposedField SFInt32 content
exposedField MFNode portals
eventIn MFNode removeChildren
}
Fields
| Field type | Node name | Data type | Default | Description |
|---|---|---|---|---|
| [in] | addChildren | MFNode | eventIn for adding children | |
| [in out] | bboxCenter | SFVec3f | 0 0 0 | bbox center |
| [in out] | bboxSize | SFVec3f | -1 -1 -1 | Size of bounding box |
| [in out] | children | MFNode | [] | All nodes being part of the cell |
| [in out] | content | SFInt32 | For application use. Depending on the application, it is possible to define content types like water, closed space, normal space, etc. (e.g. User can not walk into a Cell containing water.) | |
| [in out] | portals | MFNode | [] | Specifies list of Portals for the Cell |
| [in] | removeChildren | MFNode | eventIn for removing children |
Related nodes
CellGroupPortal
Demos
| Cells and Portals inside In this demo a scene is generated by a recursive function. The scene represents a number of rooms connected with 2, 3 and 4 doors depending on the location. The use of Cells and Portals nodes with BspTree node increases the speed of the algorithm by factor of 2-3. Another similar demo for the outer arrangement of objects may be found here: |  |
| Cells and Portals outside The demo represents a scene with regularily placed boxes (houses) and streets between them. The Cells and Portals use the information about the position and size of these objects to make a culling of the occluded objects. A similar algorithm for the inner arrangement of objects may be found here: To the demo |  |