SoGeoLOD Class |
Level-of-detail management for multi-resolution terrains.
Namespace: OIV.Inventor.Geo
The SoGeoLOD type exposes the following members.
Name | Description | |
---|---|---|
SoGeoLOD | Constructor. | |
SoGeoLOD(Int32) | Constructor that takes approximate number of children. |
Name | Description | |
---|---|---|
AddChild | Adds a child as last one in group. | |
AffectsState | Returns true if a node has an effect on the state during traversal. | |
Callback | (Overrides SoGroupCallback(SoCallbackAction).) | |
Copy | Calls Copy(false). (Inherited from SoNode.) | |
Copy(Boolean) | Creates and returns an exact copy of the node. | |
CopyFieldValues(SoFieldContainer) | Calls CopyFieldValues(fc, false). (Inherited from SoFieldContainer.) | |
CopyFieldValues(SoFieldContainer, Boolean) | Copies the contents of fc's fields into this object's fields. | |
Dispose |
Releases all resources used by SoDisposable.
(Inherited from SoDisposable.) | |
Distribute | (Inherited from SoNode.) | |
DoAction | (Overrides SoGroupDoAction(SoAction).) | |
EnableNotify | Notification at this Field Container is enabled (if flag == true) or disabled (if flag == false). | |
Equals | Determines whether the specified Object is equal to the current Object. (Inherited from Object.) | |
FieldsAreEqual | Returns true if this object's fields are exactly equal to fc's fields. | |
FindChild | Finds index of given child within group. | |
Get | Returns the values of the fields of this object in the Open Inventor ASCII file format in the given string. | |
GetAllFields | Returns a list of fields, including the eventIn's and eventOut's. | |
GetAlternateRep | This method is called by actions to allow the node to provide an "alternate representation" when appropriate (typically depending on the action type). | |
GetBoundingBox | (Overrides SoGroupGetBoundingBox(SoGetBoundingBoxAction).) | |
GetChild | Returns pointer the child node with the given index. | |
GetEventIn | Returns a the eventIn with the given name. | |
GetEventOut | Returns the eventOut with the given name. | |
GetField | Returns a the field of this object whose name is fieldName. | |
GetFieldName | Returns the name of the given field in the fieldName argument. | |
GetFields | Appends references to all of this object's fields to resultList, and returns the number of fields appended. | |
GetHashCode |
Overrides GetHashCode().
(Inherited from SoNetBase.) | |
GetMatrix | (Inherited from SoGroup.) | |
GetName | Returns the name of an instance. | |
GetNumChildren | Returns number of children. | |
GetPrimitiveCount | (Overrides SoGroupGetPrimitiveCount(SoGetPrimitiveCountAction).) | |
GetRenderEngineMode | Returns the supported Render engine mode. | |
GetRenderUnitID | (Inherited from SoNode.) | |
GetStringName | (Inherited from SoBase.) | |
GetType | Gets the Type of the current instance. (Inherited from Object.) | |
GLRender | (Overrides SoGroupGLRender(SoGLRenderAction).) | |
GLRenderBelowPath | (Inherited from SoNode.) | |
GLRenderInPath | (Inherited from SoNode.) | |
GLRenderOffPath | (Inherited from SoNode.) | |
GrabEventsCleanup | (Inherited from SoNode.) | |
GrabEventsSetup | (Inherited from SoNode.) | |
HandleEvent | (Inherited from SoGroup.) | |
HasDefaultValues | Returns true if all of the object's fields have their default values. | |
InsertChild | Adds a child so that it becomes the one with the given index. | |
IsBoundingBoxIgnoring | Used by BoundingBoxAction to known if bounding box computation should be ignored or not. | |
IsNotifyEnabled | Notification is the process of telling interested objects that this object has changed. | |
IsOverride | Returns the state of the override flag. | |
IsSynchronizable | Gets the ScaleViz synchronizable state of this object. | |
Pick | (Inherited from SoGroup.) | |
RayPick | (Overrides SoNodeRayPick(SoRayPickAction).) | |
RemoveAllChildren | Removes all children from group. | |
RemoveChild(Int32) | Removes child with given index from group. | |
RemoveChild(SoNode) | Removes first instance of given child from group. | |
ReplaceChild(Int32, SoNode) | Replaces child with given index with new child. | |
ReplaceChild(SoNode, SoNode) | Replaces first instance of given child with new child. | |
Search | (Inherited from SoGroup.) | |
Set | Sets one or more fields in this object to the values specified in the given string, which should be a string in the Open Inventor file format. | |
SetName | (Inherited from SoBase.) | |
SetOverride | Turns the override flag on or off. | |
SetSynchronizable | Sets this to be a ScaleViz synchronizable object. | |
SetToDefaults | Sets all fields in this object to their default values. | |
ToString |
Converts this SoBase structure to a human readable string.
(Inherited from SoBase.) | |
Touch | Marks an instance as modified, simulating a change to it. | |
Write | (Inherited from SoGroup.) |
Name | Description | |
---|---|---|
boundingBoxIgnoring | Whether to ignore this node during bounding box traversal. | |
center | Object-space center of the model. | |
child1Url | First child url : bottom-left quadtree child. | |
child2Url | Second child url : up-left quadtree child. | |
child3Url | Third child url : up-right quadtree child. | |
child4Url | Fourth child url : bottom-right quadtree child. | |
geoSystem | Defines the spatial reference frame. | |
IsDisposable | ISafeDisposable interface implementation.
(Inherited from SoDisposable.) | |
range | World-space distance to use as switching criteria. | |
rootUrl | Url of the file that contains the root tile geometry. | |
UserData |
Gets or sets the user data to be contained by the field container.
(Inherited from SoFieldContainer.) |
The OIV.Inventor.Geo.SoGeoLOD node allows applications to build massive tiled, multi-resolution terrain models where the viewer progressively loads higher resolution detail as you fly into the terrain.
The OIV.Inventor.Geo.SoGeoLOD node provides a terrain-specialized form of the LOD node. It is a grouping node that specifies two different levels of detail for an object using a tree structure, where 0 to 4 children can be specified, and also efficiently manages the loading and unloading of these levels of detail. The level of detail is switched depending upon whether the user is closer or further than OIV.Inventor.Geo.SoGeoLOD.range meters from the geospatial coordinate OIV.Inventor.Geo.SoGeoLOD.center. The OIV.Inventor.Geo.SoGeoLOD.center field should be specified as described in 25.2.4 Specifying geospatial coordinates. The OIV.Inventor.Geo.SoGeoLOD.geoSystem field is used to define the spatial reference frame and is described in 25.2.3 Specifying a spatial reference frame. When the user is outside the specified range, only the geometry for OIV.Inventor.Geo.SoGeoLOD.rootUrl or rootNode are displayed. When the viewer enters the specified range, this geometry is replaced with the contents of the four children files defined by OIV.Inventor.Geo.SoGeoLOD.child1Url through OIV.Inventor.Geo.SoGeoLOD.child4Url. The four children files are loaded into memory only when the user is within the specified range. Similarly, these are unloaded from memory when the user leaves this range. Figure below illustrates this process. The child URLs shall be arranged in the same order as in the figure; i.e., OIV.Inventor.Geo.SoGeoLOD.child1Url represents the bottom-left quadtree child. It is valid to specify less than four child URLs; in which case, the OIV.Inventor.Geo.SoGeoLOD should switch to the children nodes when all of the specified URLs have been loaded. This latter feature can support tree structures other than quadtrees, such as binary trees.
The OIV.Inventor.Geo.SoGeoLOD.rootUrl and rootNode fields provide two different ways to specify the geometry of the root tile. You may use one or the other. The rootNode field lets you include the geometry for the root tile directly within the file; whereas the OIV.Inventor.Geo.SoGeoLOD.rootUrl field lets you specify a URL for a file that contains the geometry. The result of specifying a value for both of these fields is undefined.
GeoLOD {
center | 0 0 0 |
child1Url | [] |
child2Url | [] |
child3Url | [] |
child4Url | [] |
geoSystem | ["GD","WE"] |
range | 10 |
rootUrl | [] |
OIV.Inventor.Actions.SoGLRenderAction, OIV.Inventor.Actions.SoCallbackAction, OIV.Inventor.Actions.SoGetBoundingBoxAction, OIV.Inventor.Actions.SoRayPickAction, OIV.Inventor.Actions.SoGetPrimitiveCountAction