public class SoLevelOfSimplification extends SoLOD
SoLOD
, it can behave as a distance-based level-of-detail node; however, it also responds to the decimation percentage element. It records what percentage decimation each child is, and then chooses the appropriate child based on the DecimationPercentage and DecimationType elements.
You should specify N percentages for N+1 children. If the DecimationType is HIGHEST or LOWEST, then the LevelOfSimplification node will automatically choose the first or last child, respectively. If the DecimationType is PERCENTAGE, then the node will choose child "i" based on the decimation percentage element value such that:
If the DecimationType is AUTOMATIC, then the child is chosen based on the range value in the usualpercentages[i-1] <= DecimationPercentage < percentages[i]
SoLOD
manner, but no child greater than the value of the DecimationPercentage element will be chosen.
This node also has a field for recording how many triangles the full detail child contains. This allows this node to answer an SoGetPrimitiveCountAction
without traversing its children. This is a benefit when some children contain WWWInline , a common occurrence. If the children contain some non-triangle primitives, then the field should be -1 which will force the node to traverse its children during SoGetPrimitiveCountAction
.
File format/default:
LevelOfSimplification {
percentages | [] |
numTriangles | -1 |
center | 0 0 0 |
range | [ ] |
Action behavior:
SoGLRenderAction
, SoRayPickAction
, SoCallbackAction
Only the child with the appropriate level of detail is traversed.
SoGetPrimitiveCountAction
A child is chosen in the same way as in GLRender. If the numTriangles
field is greater than 0, the percentage value for this child is multiplied by the numTriangles
value and this value is added to the PrimitiveCount without traversing the child. If numTriangles
is less than or equal to 0, then the child is traversed to get the count.
Other actions
Implemented as for SoGroup
See also:
SoGetPrimitiveCountAction
, SoLOD
, SoOctreeOrdering, SoRenderList, SoValueOrdering SoLevelOfDetail
SoNode.RenderModes
Inventor.ConstructorCommand
Modifier and Type | Field and Description |
---|---|
SoSFInt32 |
numTriangles
Number of triangles in highest (1.0) case.
|
SoMFFloat |
percentages
Percentage decimation for each child.
|
boundingBoxIgnoring
VERBOSE_LEVEL, ZeroHandle
Constructor and Description |
---|
SoLevelOfSimplification()
Creates level-of-simplification node with default settings.
|
SoLevelOfSimplification(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 percentages
public final SoSFInt32 numTriangles
Generated on July 31, 2019, Copyright © Thermo Fisher Scientific. All rights reserved. http://www.openinventor.com