public class SoLevelOfDetail extends SoGroup
The size is computed as the area of the screen rectangle enclosing the projection of the 3D bounding box that encloses all of the children. When rendering, this size is compared to the values in the screenArea
field. If the size is greater than the first value, child 0 is traversed. If it is smaller than the first, but greater than the second, child 1 is traversed, and so on. If there are fewer children than are required by this rule, the last child is traversed. The screenArea
field contains just 0 by default, so the first child is always traversed.
The size calculation takes the current complexity into account. If the complexity is 0 or is of type BOUNDING_BOX, the last child is always traversed. If the complexity is less than .5, the computed size is scaled down appropriately to use (possibly) a less detailed representation. If the complexity is greater than .5, the size is scaled up. At complexity 1, the first child is always used.
Note that the SoLOD
node is similar to SoLevelOfDetail
, except the switching between levels in the SoLOD
node is based on distance from the camera, which is faster than using screen area.
File format/default:
LevelOfDetail {
screenArea | 0 |
Action behavior:
SoGLRenderAction
, SoRayPickAction
, SoCallbackAction
Only the child with the appropriate level of detail is traversed.
SoGetBoundingBoxAction
The box that encloses all children is computed. (This is the box that is needed to compute the projected size.)
Other actions
All implemented as for SoGroup
.
See also:
SoNode.RenderModes
Inventor.ConstructorCommand
Modifier and Type | Field and Description |
---|---|
SoMFFloat |
screenArea
Areas to use for comparison.
|
boundingBoxIgnoring
VERBOSE_LEVEL, ZeroHandle
Constructor and Description |
---|
SoLevelOfDetail()
Creates a level-of-detail node with default settings.
|
SoLevelOfDetail(int nChildren)
Constructor that takes approximate number of children.
|
addChild, findChild, getChild, getNumChildren, insertChild, removeAllChildren, removeChild, removeChild, replaceChild, replaceChild
affectsState, callback, copy, copy, distribute, doAction, getAlternateRep, getBoundingBox, getByName, getMatrix, getPrimitiveCount, getRenderEngineMode, getRenderUnitID, GLRender, GLRenderBelowPath, GLRenderInPath, GLRenderOffPath, grabEventsCleanup, grabEventsSetup, handleEvent, isBoundingBoxIgnoring, isOverride, pick, rayPick, search, setOverride, touch, write
copyFieldValues, copyFieldValues, enableNotify, fieldsAreEqual, get, getAllFields, getEventIn, getEventOut, getField, getFieldName, hasDefaultValues, isNotifyEnabled, set, setToDefaults
dispose, getName, isDisposable, isSynchronizable, setName, setSynchronizable
getNativeResourceHandle
public final SoMFFloat screenArea
Generated on July 31, 2019, Copyright © Thermo Fisher Scientific. All rights reserved. http://www.openinventor.com