SoVRMLLOD(3)

📦
version 4.0.10 · 4 versions
, in fedora 43, fedora 44

💖 SoVRMLLOD(3) 💖 — Coin

okay bestie, buckle up 🎀 this is the manual page for SoVRMLLOD, and it's so long it comes in three parts — you're reading part 1 rn, so don't go anywhere, there's more. ✨

🌸 NAME 🌸

SoVRMLLOD — the class that represents the various levels of detail based on distance. yes, literally: how much detail you show depends on how far away the thing is. it's giving "glow up when you get closer" energy 💅

🦋 SYNOPSIS 🦋

#include <Inventor/VRMLnodes/SoVRMLLOD.h>

Inherits SoGroup.

✨ Public Member Functions ✨

  • virtual SoType getTypeId (void) const
  • SoVRMLLOD (void)
  • SoVRMLLOD (int levels)
  • virtual SbBool affectsState (void) const
  • void addLevel (SoNode *level)
  • void insertLevel (SoNode *level, int idx)
  • SoNode * getLevel (int idx) const
  • int findLevel (const SoNode *level) const
  • int getNumLevels (void) const
  • void removeLevel (int idx)
  • void removeLevel (SoNode *level)
  • void removeAllLevels (void)
  • void replaceLevel (int idx, SoNode *level)
  • void replaceLevel (SoNode *old, SoNode *level)
  • virtual void doAction (SoAction *action)
  • virtual void callback (SoCallbackAction *action)
  • virtual void GLRender (SoGLRenderAction *action)
  • virtual void rayPick (SoRayPickAction *action)
  • virtual void getBoundingBox (SoGetBoundingBoxAction *action)
  • virtual void search (SoSearchAction *action)
  • virtual void write (SoWriteAction *action)
  • virtual void getPrimitiveCount (SoGetPrimitiveCountAction *action)
  • virtual void audioRender (SoAudioRenderAction *action)
  • virtual void GLRenderBelowPath (SoGLRenderAction *action)
  • virtual void GLRenderInPath (SoGLRenderAction *action)
  • virtual void GLRenderOffPath (SoGLRenderAction *action)
  • void addChild (SoNode *child)
  • void insertChild (SoNode *child, int idx)
  • SoNode * getChild (int idx) const
  • int findChild (const SoNode *child) const
  • int getNumChildren (void) const
  • void removeChild (int idx)
  • void removeChild (SoNode *child)
  • void removeAllChildren (void)
  • void replaceChild (int idx, SoNode *child)
  • void replaceChild (SoNode *old, SoNode *child)
  • virtual SoChildList * getChildren (void) const

🫶 Public Member Functions inherited from SoGroup

  • SoGroup (void)
  • SoGroup (int nchildren)
  • virtual void getMatrix (SoGetMatrixAction *action)
  • virtual void handleEvent (SoHandleEventAction *action)
  • virtual void pick (SoPickAction *action)
  • virtual void addWriteReference (SoOutput *out, SbBool isfromfield=FALSE)

🫶 Public Member Functions inherited from SoNode

  • void setOverride (const SbBool state)
  • SbBool isOverride (void) const
  • void setNodeType (const NodeType type)
  • NodeType getNodeType (void) const
  • virtual SoNode * copy (SbBool copyconnections=FALSE) const
  • virtual void grabEventsSetup (void)
  • virtual void grabEventsCleanup (void)
  • virtual void startNotify (void)
  • SbUniqueId getNodeId (void) const
  • virtual void writeInstance (SoOutput *out)
  • virtual SoNode * addToCopyDict (void) const
  • virtual SoFieldContainer * copyThroughConnection (void) const

🫶 Public Member Functions inherited from SoFieldContainer

  • void setToDefaults (void)
  • SbBool hasDefaultValues (void) const
  • SbBool fieldsAreEqual (const SoFieldContainer *container) const
  • void copyFieldValues (const SoFieldContainer *container, SbBool copyconnections=FALSE)
  • SbBool set (const char *const fielddata)
  • void get (SbString &fielddata)
  • virtual int getFields (SoFieldList &l) const
  • virtual int getAllFields (SoFieldList &l) const
  • virtual SoField * getField (const SbName &name) const
  • virtual SoField * getEventIn (const SbName &name) const
  • virtual SoField * getEventOut (const SbName &name) const
  • SbBool getFieldName (const SoField *const field, SbName &name) const
  • SbBool enableNotify (const SbBool flag)
  • SbBool isNotifyEnabled (void) const
  • SbBool set (const char *fielddata, SoInput *input)
  • void get (SbString &fielddata, SoOutput *out)
  • virtual SbBool validateNewFieldValue (SoField *field, void *newval)
  • SbBool getIsBuiltIn (void) const
  • virtual void getFieldsMemorySize (size_t &managed, size_t &unmanaged) const
  • void setUserData (void *userdata) const
  • void * getUserData (void) const

🫶 Public Member Functions inherited from SoBase

  • void ref (void) const
  • void unref (void) const
  • void unrefNoDelete (void) const
  • int32_t getRefCount (void) const
  • void touch (void)
  • SbBool isOfType (SoType type) const — returns TRUE if the type of this object is either of the same type or inherited from type. 💅
  • virtual SbName getName (void) const
  • virtual void setName (const SbName &newname)
  • void addAuditor (void *const auditor, const SoNotRec::Type type)
  • void removeAuditor (void *const auditor, const SoNotRec::Type type)
  • const SoAuditorList & getAuditors (void) const
  • SbBool shouldWrite (void)
  • void assertAlive (void) const

⭐ Static Public Member Functions ⭐

  • static SoType getClassTypeId (void)
  • static void initClass (void)

🫶 Static Public Member Functions inherited from SoGroup

  • static SoType getClassTypeId (void)
  • static void initClass (void) — sets up initialization for data common to all instances of this class, like submitting necessary information to the Coin type system. 💫

🫶 Static Public Member Functions inherited from SoNode

  • static uint32_t getCompatibilityTypes (const SoType &nodetype)
  • static SoType getClassTypeId (void)
  • static SoNode * getByName (const SbName &name)
  • static int getByName (const SbName &name, SoNodeList &l)
  • static void initClass (void) — sets up initialization for data common to all instances of this class, like submitting necessary information to the Coin type system. 💫
  • static void initClasses (void)
  • static SbUniqueId getNextNodeId (void)
  • static int getActionMethodIndex (const SoType type)
  • static void getBoundingBoxS (SoAction *action, SoNode *node)
  • static void GLRenderS (SoAction *action, SoNode *node)
  • static void callbackS (SoAction *action, SoNode *node)
  • static void getMatrixS (SoAction *action, SoNode *node)
  • static void handleEventS (SoAction *action, SoNode *node)
  • static void pickS (SoAction *action, SoNode *node)
  • static void rayPickS (SoAction *action, SoNode *node)
  • static void searchS (SoAction *action, SoNode *node)
  • static void writeS (SoAction *action, SoNode *node)
  • static void audioRenderS (SoAction *action, SoNode *node)
  • static void getPrimitiveCountS (SoAction *action, SoNode *node)

🫶 Static Public Member Functions inherited from SoFieldContainer

  • static void initClass (void) — sets up initialization for data common to all instances of this class, like submitting necessary information to the Coin type system. 💫
  • static SoType getClassTypeId (void) — this static method returns the SoType object associated with objects of this class. 🔍
  • static void cleanupClass (void)
  • static void initCopyDict (void)
  • static void addCopy (const SoFieldContainer *orig, const SoFieldContainer *copy)
  • static SoFieldContainer * checkCopy (const SoFieldContainer *orig)
  • static SoFieldContainer * findCopy (const SoFieldContainer *orig, const SbBool copyconnections)
  • static void copyDone (void)

🫶 Static Public Member Functions inherited from SoBase

  • static void initClass (void) — sets up initialization for data common to all instances of this class, like submitting necessary information to the Coin type system. 💫
  • static SoType getClassTypeId (void) — this static method returns the SoType object associated with objects of this class. 🔍
  • static void addName (SoBase *const base, const char *const name)
  • static void removeName (SoBase *const base, const char *const name)
  • static void incrementCurrentWriteCounter (void)
  • static void decrementCurrentWriteCounter (void)
  • static SoBase * getNamedBase (const SbName &name, SoType type)
  • static int getNamedBases (const SbName &name, SoBaseList &baselist, SoType type)
  • static SbBool read (SoInput *input, SoBase *&base, SoType expectedtype)
  • static void setInstancePrefix (const SbString &c)
  • static void setTraceRefs (SbBool trace)
  • static SbBool getTraceRefs (void)
  • static SbBool connectRoute (SoInput *input, const SbName &fromnodename, const SbName &fromfieldname, const SbName &tonodename, const SbName &tofieldname)
  • static SbBool readRoute (SoInput *input)

🌈 Public Attributes 🌈

  • SoMFFloat range
  • SoSFVec3f center
  • SoMFNode level

🎀 Protected Member Functions 🎀

  • virtual const SoFieldData * getFieldData (void) const
  • virtual ~SoVRMLLOD ()
  • virtual void notify (SoNotList *list)
  • virtual SbBool readInstance (SoInput *in, unsigned short flags)
  • virtual void copyContents (const SoFieldContainer *from, SbBool copyConn)
  • virtual int whichToTraverse (SoAction *action)

🫶 Protected Member Functions inherited from SoGroup

  • virtual ~SoGroup ()
  • virtual SbBool readChildren (SoInput *in)
  • virtual SoNotRec createNotRec (void)
  • void setOperation (const SoNotRec::OperationType opType=SoNotRec::UNSPECIFIED, const SoNode *cc=NULL, const SoNode *pc=NULL, const int ci=-1)

🫶 Protected Member Functions inherited from SoNode

  • SoNode (void)
  • virtual ~SoNode ()

🫶 Protected Member Functions inherited from SoFieldContainer

  • SoFieldContainer (void)
  • virtual ~SoFieldContainer ()

🫶 Protected Member Functions inherited from SoBase

  • SoBase (void)
  • virtual ~SoBase ()
  • virtual void destroy (void)
  • SbBool hasMultipleWriteRefs (void) const
  • SbBool writeHeader (SoOutput *out, SbBool isgroup, SbBool isengine) const
  • void writeFooter (SoOutput *out) const
  • virtual const char * getFileFormatName (void) const

💜 Static Protected Member Functions 💜

  • static const SoFieldData ** getFieldDataPtr (void)

🫶 Static Protected Member Functions inherited from SoGroup

  • static const SoFieldData ** getFieldDataPtr (void)

🫶 Static Protected Member Functions inherited from SoNode

  • static const SoFieldData ** getFieldDataPtr (void)
  • static void setNextActionMethodIndex (int index)
  • static int getNextActionMethodIndex (void)
  • static void incNextActionMethodIndex (void)
  • static void setCompatibilityTypes (const SoType &nodetype, const uint32_t bitmask)

🫶 Static Protected Member Functions inherited from SoBase

  • static uint32_t getCurrentWriteCounter (void)
  • static void staticDataLock (void)
  • static void staticDataUnlock (void)

🌟 Additional Inherited Members 🌟

🫶 Public Types inherited from SoNode

enum NodeType { INVENTOR = 0x0000, VRML1 = 0x0001, VRML2 = 0x0002,
    INVENTOR_1 = 0x0004, INVENTOR_2_0 = 0x0008, INVENTOR_2_1 = 0x0010,
    INVENTOR_2_5 = 0x0020, INVENTOR_2_6 = 0x0040, COIN_1_0 = 0x0080,
    COIN_2_0 = 0x0100, EXTENSION = 0x0200, COIN_2_2 = 0x0400, COIN_2_3 =
    0x0800, COIN_2_4 = 0x1000, INVENTOR_5_0 = 0x2000, COIN_2_5 = 0x4000,
    COIN_3_0 = 0x8000, INVENTOR_6_0 = 0x10000, COIN_4_0 = 0x20000 }

🫶 Protected Types inherited from SoBase

enum BaseFlags { IS_ENGINE = 0x01, IS_GROUP = 0x02 }

🫶 Protected Attributes inherited from SoGroup

  • SoChildList * children

🫶 Protected Attributes inherited from SoNode

  • SbUniqueId uniqueId

and that's just part 1, bestie — there's MORE. keep scrolling, we're not done yet 💅✨

🫶 Protected Attributes inherited from SoFieldContainer

  • SbBool isBuiltIn

✨ Static Protected Attributes inherited from SoNode

  • static SbUniqueId nextUniqueId = 1
  • static int nextActionMethodIndex = 0

💖 Detailed Description 💖

Bestie, this is THE class for level-of-detail based on distance. SoVRMLLOD is used to represent various levels of detail based on distance. Slay. 🎀

The detailed class documentation is taken verbatim from the VRML97 standard (ISO/IEC 14772-1:1997). It is copyright The Web3D Consortium, and is used by permission of the Consortium:

LOD {
  exposedField MFNode  level    []
  field        SFVec3f center   0 0 0    # (-,)
  field        MFFloat range    []       # (0,)
}

The LOD node specifies various levels of detail or complexity for a given object, and provides hints allowing browsers to automatically choose the appropriate version of the object based on the distance from the user. The level field contains a list of nodes that represent the same object or objects at varying levels of detail, ordered from highest level of detail to the lowest level of detail. The range field specifies the ideal distances at which to switch between the levels. Subclause 4.6.5, Grouping and children nodes (http://www.web3d.org/documents/specifications/14772/V2.0/part1/concepts.html#4.6.5), contains details on the types of nodes that are legal values for level. 👑

The center field is a translation offset in the local coordinate system that specifies the centre of the LOD node for distance calculations. 📍

The number of nodes in the level field shall exceed the number of values in the range field by one (i.e., N+1 level values for N range values). The range field contains monotonic increasing values that shall be greater than zero. In order to calculate which level to display, first the distance is calculated from the viewer's location, transformed into the local coordinate system of the LOD node (including any scaling transformations), to the center point of the LOD node. Then, the LOD node evaluates the step function L(d) to choose a level for a given value of d (where d is the distance from the viewer position to the centre of the LOD node). Let n ranges, R0, R1, R2, ..., Rn-1, partition the domain (0, +infinity) into n+1 subintervals given by (0, R0), [R0, R1)... , [Rn-1, +infinity). Also, let n levels L0, L1, L2, ..., Ln-1 be the values of the step function function L(d). The level node, L(d), for a given distance d is defined as follows:

L(d) = L0,   if d < R0,
     = Li+1, if Ri <= d < Ri+1, for -1 < i < n-1,
     = Ln-1, if d >= Rn-1.

Specifying too few levels will result in the last level being used repeatedly for the lowest levels of detail. If more levels than ranges are specified, the extra levels are ignored. An empty range field is an exception to this rule. This case is a hint to the browser that it may choose a level automatically to maintain a constant display rate. Each value in the range field shall be greater than the previous value. 😭 so many rules, but we respect them

LOD nodes are evaluated top-down in the scene graph. Only the descendants of the currently selected level are rendered. All nodes under an LOD node continue to receive and send events regardless of which LOD node's level is active. For example, if an active TimeSensor node is contained within an inactive level of an LOD node, the TimeSensor node sends events regardless of the LOD node's state. 🔥

🧚 Constructor & Destructor Documentation 🧚

SoVRMLLOD::SoVRMLLOD (void )

Constructor. That's it, that's the whole vibe. ✨

SoVRMLLOD::SoVRMLLOD (int levels)

Constructor. levels is the expected number of levels. 🎀

SoVRMLLOD::~SoVRMLLOD () [protected], [virtual]

Destructor. 💀 (protected AND virtual, she contains multitudes)

👑 Member Function Documentation 👑

SoType SoVRMLLOD::getClassTypeId (void ) [static]

This static method returns the SoType object associated with objects of this class. 🦋

SoType SoVRMLLOD::getTypeId (void ) const [virtual]

Returns the type identification of an object derived from a class inheriting SoBase. This is used for runtime type checking and "downward" casting. iykyk

Reimplemented from SoGroup.

const SoFieldData ** SoVRMLLOD::getFieldDataPtr (void ) [static], [protected]

This API member is considered internal to the library, as it is not likely to be of interest to the application programmer. 🙈

Returns the SoFieldData class which holds information about fields in this node.

const SoFieldData * SoVRMLLOD::getFieldData (void ) const [protected], [virtual]

Returns a pointer to the class-wide field data storage object for this instance. If no fields are present, returns NULL. 🫶

Reimplemented from SoGroup.

void SoVRMLLOD::initClass (void ) [static]

(no description given in the original, bestie — she's just there, doing her thing) ✨

SbBool SoVRMLLOD::affectsState (void ) const [virtual]

Returns TRUE if the node could have any effect on the state during traversal. ⭐

If it returns FALSE, no data in the traversal state will change from the pre-traversal state to the post-traversal state. The SoSeparator node will for instance return FALSE, as it pushes and pops the state before and after traversal of its children. All SoShape nodes will also return FALSE, as just pushing out geometry data to the rendering engine won't affect the actual rendering state.

The default method returns TRUE, on a "better safe than sorry" philosophy. 💅 honestly? valid

Reimplemented from SoNode.

void SoVRMLLOD::addLevel (SoNode * levelptr)

Adds a new level. ➕

void SoVRMLLOD::insertLevel (SoNode * levelptr, int idx)

Inserts a new level.

SoNode * SoVRMLLOD::getLevel (int idx) const

Returns a level.

int SoVRMLLOD::findLevel (const SoNode * node) const

Find node, and return the level index or -1 if not found. 🔍

int SoVRMLLOD::getNumLevels (void ) const

Return the number of levels.

void SoVRMLLOD::removeLevel (int idx)

Removes the level at index idx.

void SoVRMLLOD::removeLevel (SoNode * levelptr)

Find level, and remove it if found. 🗑️

void SoVRMLLOD::removeAllLevels (void )

Remove all levels. EVERY. SINGLE. ONE. 😭

void SoVRMLLOD::replaceLevel (int idx, SoNode * node)

Replace the level at idx with node. 🔁

void SoVRMLLOD::replaceLevel (SoNode * oldnode, SoNode * newnode)

Find oldnode, and replace it with newnode.

void SoVRMLLOD::doAction (SoAction * action) [virtual]

This function performs the typical operation of a node for any action. 🎬

Reimplemented from SoGroup.

void SoVRMLLOD::callback (SoCallbackAction * action) [virtual]

Action method for SoCallbackAction.

Simply updates the state according to how the node behaves for the render action, so the application programmer can use the SoCallbackAction for extracting information about the scene graph. 🔎

Reimplemented from SoGroup.

void SoVRMLLOD::GLRender (SoGLRenderAction * action) [virtual]

Action method for the SoGLRenderAction.

This is called during rendering traversals. Nodes influencing the rendering state in any way or want to throw geometry primitives at OpenGL override this method. throwing geometry primitives at OpenGL, iconic behaviour honestly 🌈

Reimplemented from SoGroup.

void SoVRMLLOD::rayPick (SoRayPickAction * action) [virtual]

Action method for SoRayPickAction.

Checks the ray specification of the action and tests for intersection with the data of the node. 🎯

Nodes influencing relevant state variables for how picking is done also override this method.

Reimplemented from SoNode.

void SoVRMLLOD::getBoundingBox (SoGetBoundingBoxAction * action) [virtual]

Action method for the SoGetBoundingBoxAction.

Calculates bounding box and center coordinates for node and modifies the values of the action to encompass the bounding box for this node and to shift the center point for the scene more towards the one for this node. 📦

Nodes influencing how geometry nodes calculate their bounding box also override this method to change the relevant state variables.

Reimplemented from SoGroup.

void SoVRMLLOD::search (SoSearchAction * action) [virtual]

Action method for SoSearchAction.

Compares the search criteria from the action to see if this node is a match. Searching is done by matching up all criteria set up in the SoSearchAction -- if any of the requested criteria is a miss, the search is not deemed successful for the node. 🔍💅

See also

  • SoSearchAction

Reimplemented from SoGroup.

void SoVRMLLOD::write (SoWriteAction * action) [virtual]

Action method for SoWriteAction.

Writes out a node object, and any connected nodes, engines etc, if necessary. ✍️

Reimplemented from SoGroup.

void SoVRMLLOD::getPrimitiveCount (SoGetPrimitiveCountAction * action) [virtual]

Action method for the SoGetPrimitiveCountAction.

Calculates the number of triangle, line segment and point primitives for the node and adds these to the counters of the action. 🔺➖⚫

Nodes influencing how geometry nodes calculate their primitive count also override this method to change the relevant state variables.

Reimplemented from SoGroup.

void SoVRMLLOD::audioRender (SoAudioRenderAction * action) [virtual]

Action method for SoAudioRenderAction.

Does common processing for SoAudioRenderAction action instances. 🔊

Reimplemented from SoGroup.

void SoVRMLLOD::GLRenderBelowPath (SoGLRenderAction * action) [virtual]

Implements the SoAction::BELOW_PATH traversal method for the rendering action. ⬇️

Reimplemented from SoNode.

void SoVRMLLOD::GLRenderInPath (SoGLRenderAction * action) [virtual]

Implements the SoAction::IN_PATH traversal method for the rendering action. ➡️

Reimplemented from SoNode.

void SoVRMLLOD::GLRenderOffPath (SoGLRenderAction * action) [virtual]

Implements the SoAction::OFF_PATH traversal method for the rendering action. 🚫

Reimplemented from SoNode.

void SoVRMLLOD::addChild (SoNode * node) [virtual]

Append a child node to the list of children nodes this group node is managing. 👶

Please note that this method is not virtual in the original SGI Inventor API. important lore, bestie

Reimplemented from SoGroup.

void SoVRMLLOD::insertChild (SoNode * child, int newchildindex) [virtual]

Insert a child node at position newchildindex. 📥

newchildindex must be <= this->getNumChildren()

Please note that this method is not virtual in the original SGI Inventor API.

Reimplemented from SoGroup.

SoNode * SoVRMLLOD::getChild (int index) const [virtual]

Returns pointer to child node at index.

Please note that this method is not virtual in the original SGI Inventor API.

Reimplemented from SoGroup.

int SoVRMLLOD::findChild (const SoNode * node) const [virtual]

Returns index in our list of children for child node, or -1 if node is not a child of this group node. 🔍

Please note that this method is not virtual in the original SGI Inventor API.

Reimplemented from SoGroup.

int SoVRMLLOD::getNumChildren (void ) const [virtual]

Returns number of child nodes managed by this group. 🔢

Please note that this method is not virtual in the original SGI Inventor API.

Reimplemented from SoGroup.

void SoVRMLLOD::removeChild (int childindex) [virtual]

Remove node at childindex in our list of children. ✂️

void SoVRMLLOD::removeChild (SoNode * child) [virtual]

okay so this one ✨removes✨ child from the set of children that this group node is managing. and bestie, it will decrease the reference count of child by 1. no cap.

it's giving convenience method energy — it literally just calls findChild() with child as the argument, and then calls removeChild(int) if the child is actually found. that's it, that's the whole vibe. 🫶

⚠️ heads up: this method is not virtual in the original SGI Inventor API.

Reimplemented from SoGroup.

void SoVRMLLOD::removeAllChildren (void ) [virtual]

so this one? it stops managing the children entirely. like, it's over, we're done. it will dereference all children by 1 as they are removed. every single one. 💅

⚠️ reminder bestie: this method is not virtual in the original SGI Inventor API.

Reimplemented from SoGroup.

void SoVRMLLOD::replaceChild (int index, SoNode * newchild) [virtual]

replace the child sitting at index with newChild. slay.

it dereferences the child that was previously at index, and increases the reference count of newChild by 1. balanced. iconic. 🔥

just know that:

index must be < this->getNumChildren()

like, that's the rule, don't fight it.

⚠️ you already know: this method is not virtual in the original SGI Inventor API.

Reimplemented from SoGroup.

void SoVRMLLOD::replaceChild (SoNode * oldchild, SoNode * newchild) [virtual]

replace oldchild with newchild. simple as that.

it dereferences oldchild by 1, and increases the reference count of newchild by 1. math is mathing. ✨

this is a convenience method, meaning it will simply call findChild() with oldchild as argument, and call replaceChild(int, SoNode*) if the child is found. lowkey efficient, highkey cute. 🎀

⚠️ not virtual in the original SGI Inventor API, bestie. just so you know.

Reimplemented from SoGroup.

SoChildList * SoVRMLLOD::getChildren (void ) const [virtual]

returns the list of children. that's it. the whole list. go off. 📋

Reimplemented from SoGroup.

void SoVRMLLOD::notify (SoNotList * l) [protected], [virtual]

notifies all auditors for this instance when changes are made. like a group chat ping but for your scene graph. 📣

Reimplemented from SoNode.

SbBool SoVRMLLOD::readInstance (SoInput * in, unsigned short flags) [protected], [virtual]

okay so this method is mainly intended for internal use during file import operations. it reads a definition of an instance from the input stream in. the input stream state points to the start of a serialized / persistent representation of an instance of this class type.

TRUE or FALSE is returned, depending on if the instantiation and configuration of the new object of this class type went OK or not. the import process should be robust and handle corrupted input streams by returning FALSE. no crashing, no drama, just FALSE. 💀

flags is used internally during binary import when reading user extension nodes, group nodes or engines. iykyk.

Reimplemented from SoGroup.

void SoVRMLLOD::copyContents (const SoFieldContainer * from, SbBool copyconnections) [protected], [virtual]

makes a deep copy of all data of from into this instance, except external scene graph references if copyconnections is FALSE. periodt.

this is the method that should be overridden by extension node / engine / dragger / whatever subclasses which need to account for internal data that are not handled automatically. basically: if you got secrets, handle them here. 🙈

for copying nodes from application code, you should not invoke this function directly, but rather call the SoNode::copy() function:

SoNode * mynewnode = templatenode->copy();

the same also goes for engines.

make sure that when you override the copyContents() method in your extension class that you also make it call upwards to its parent superclass in the inheritance hierarchy, as copyContents() in for instance SoNode and SoFieldContainer does important work. it should go something like this:

void
MyCoinExtensionNode::copyContents(const SoFieldContainer * from,
                                  SbBool copyconnections)
{
  // let parent superclasses do their thing (copy fields, copy
  // instance name, etc.)
  SoNode::copyContents(from, copyconnections);

  // [..then copy internal data..]
}

Reimplemented from SoGroup.

int SoVRMLLOD::whichToTraverse (SoAction * action) [protected], [virtual]

returns the child to traverse based on distance to current viewpoint. like it's literally doing a vibe check on the distance and picking the right level. 📏✨

🦋 Member Data Documentation 🦋

  • SoMFFloat SoVRMLLOD::range — The range for each level. 🎯
  • SoSFVec3f SoVRMLLOD::center — The center used when calculating distance. 📍
  • SoMFNode SoVRMLLOD::level — The different levels. 🪜

🌸 Author 🌸

Generated automatically by Doxygen for Coin from the source code. 🤖 (not a human, just a very diligent robot bestie)

and that's a wrap on SoVRMLLOD(3), bestie!! 💖✨ this page was brought to you by version 4.0.10, dated Thu Jun 25 2026 00:00:00. go forth and LOD responsibly. mwah 💅🫶

📦 where this page comes from