SoVRMLNavigationInfo(3)

📦 version 3.1.3, in fedora 43, fedora 44

✨ SoVRMLNavigationInfo ✨

okay bestie, buckle up — this is the manual page for SoVRMLNavigationInfo(3) from the Library Functions Manual, and she is a whole vibe. this class is literally the one that tells your scene how the avatar and the viewer should be set up. main character energy for real. 💅

🌸 NAME 🌸

SoVRMLNavigationInfo — the class that's used to specify avatar and viewer settings. that's it, that's the job, and she does it flawlessly. 🫶

🦋 SYNOPSIS 🦋

#include <Inventor/VRMLnodes/SoVRMLNavigationInfo.h>

Inherits SoNode. yes queen, she's part of the family tree. 🌳

💖 Public Member Functions 💖

the ones that are hers, hand-picked:

  • virtual SoType getTypeId (void) const — returns her type id, iykyk
  • SoVRMLNavigationInfo (void) — the constructor, the birth of an icon ✨
  • virtual void GLRender (SoGLRenderAction *action) — does the actual GL rendering thing

💅 Public Member Functions inherited from SoNode 💅

borrowed from the parent, still slaying:

  • 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 SbBool affectsState (void) const
  • virtual void doAction (SoAction *action)
  • virtual void GLRenderBelowPath (SoGLRenderAction *action)
  • virtual void GLRenderInPath (SoGLRenderAction *action)
  • virtual void GLRenderOffPath (SoGLRenderAction *action)
  • virtual void callback (SoCallbackAction *action)
  • virtual void getBoundingBox (SoGetBoundingBoxAction *action)
  • virtual void getMatrix (SoGetMatrixAction *action)
  • virtual void handleEvent (SoHandleEventAction *action)
  • virtual void pick (SoPickAction *action)
  • virtual void rayPick (SoRayPickAction *action)
  • virtual void search (SoSearchAction *action)
  • virtual void write (SoWriteAction *action)
  • virtual void audioRender (SoAudioRenderAction *action)
  • virtual void getPrimitiveCount (SoGetPrimitiveCountAction *action)
  • virtual void grabEventsSetup (void)
  • virtual void grabEventsCleanup (void)
  • virtual void startNotify (void)
  • virtual void notify (SoNotList *l)
  • uint32_t getNodeId (void) const
  • virtual SoChildList * getChildren (void) const
  • virtual void writeInstance (SoOutput *out)
  • virtual SoNode * addToCopyDict (void) const
  • virtual void copyContents (const SoFieldContainer *from, SbBool copyconnections)
  • 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)
  • virtual void addWriteReference (SoOutput *out, SbBool isfromfield=FALSE)
  • 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
  • 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 ⭐

hers, and they're static:

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

🌈 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)
  • static void initClasses (void)
  • static uint32_t 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)
  • static SoType getClassTypeId (void)
  • 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)
  • static SoType getClassTypeId (void)
  • 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 👑

the actual data, the moment everyone's been waiting for:

  • SoMFString type
  • SoSFFloat speed
  • SoMFFloat avatarSize
  • SoSFFloat visibilityLimit
  • SoSFBool headlight

🙈 Protected Member Functions 🙈

she's a little private bestie:

  • virtual const SoFieldData * getFieldData (void) const
  • virtual ~SoVRMLNavigationInfo () — the destructor, goodbye gorgeous 💔

🧚♀️ Protected Member Functions inherited from SoNode 🧚♀️

  • SoNode (void)
  • virtual ~SoNode ()
  • virtual SbBool readInstance (SoInput *in, unsigned short flags)

🎀 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 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)

💅 Protected Attributes 💅

  • SoSFBool set_bind
  • SoSFBool isBound

🦋 Protected Attributes inherited from SoNode 🦋

  • uint32_t uniqueId

🍓 Protected Attributes inherited from SoFieldContainer 🍓

  • SbBool isBuiltIn

🌟 Additional Inherited Members 🌟

the bonus lore, bestie. don't skip it. 🙏

✨ 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
}

🧚 Protected Types inherited from SoBase 🧚

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

💖 Static Protected Attributes inherited from SoNode 💖

  • static uint32_t nextUniqueId = 1
  • static int nextActionMethodIndex = 0

okay so that's the whole interface reveal — and there is so much more where this came from, so don't you dare close the tab. part 2 is on the way and it's gonna eat. 💅✨

💖 DETAILED DESCRIPTION 💖

The SoVRMLNavigationInfo class is used to specify avatar and viewer settings.

okay so real talk bestie — the detailed class documentation below 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. Iconic of them, honestly. 🫶

NavigationInfo {
  eventIn      SFBool   set_bind
  exposedField MFFloat  avatarSize      [0.25, 1.6, 0.75] # [0, inf)
  exposedField SFBool   headlight       TRUE
  exposedField SFFloat  speed           1.0               # [0, inf)
  exposedField MFString type            ["WALK", "ANY"]
  exposedField SFFloat  visibilityLimit 0.0               # [0, inf)
  eventOut     SFBool   isBound
}

The NavigationInfo node contains information describing the physical characteristics of the viewer's avatar and viewing model. NavigationInfo node is a bindable node (see 4.6.10, Bindable children nodes: http://www.web3d.org/x3d/specifications/vrml/ISO-IEC-14772-VRML97/part1/concepts.html#4.6.10). So bestie, there exists a NavigationInfo node stack, and the top-most NavigationInfo node on the stack is the currently bound NavigationInfo node. The current NavigationInfo node is considered to be a child of the current Viewpoint node regardless of where it is initially located in the VRML file. Whenever the current Viewpoint nodes changes, the current NavigationInfo node shall be re-parented to it by the browser. Whenever the current NavigationInfo node changes, the new NavigationInfo node shall be re-parented to the current Viewpoint node by the browser. If a TRUE value is sent to the set_bind eventIn of a NavigationInfo node, the node is pushed onto the top of the NavigationInfo node stack. When a NavigationInfo node is bound, the browser uses the fields of the NavigationInfo node to set the navigation controls of its user interface, and the NavigationInfo node is conceptually re-parented under the currently bound Viewpoint node. All subsequent scaling changes to the current Viewpoint node's coordinate system automatically change aspects (see below) of the NavigationInfo node values used in the browser (e.g., scale changes to any ancestors' transformations). A FALSE value sent to set_bind pops the NavigationInfo node from the stack, results in an isBound FALSE event, and pops to the next entry in the stack which shall be re-parented to the current Viewpoint node. 4.6.10, Bindable children nodes, has more details on binding stacks (http://www.web3d.org/x3d/specifications/vrml/ISO-IEC-14772-VRML97/part1/concepts.html#4.6.10). ✨

The type field specifies an ordered list of navigation paradigms that specify a combination of navigation types and the initial navigation type. The navigation type of the currently bound NavigationInfo node determines the user interface capabilities of the browser. For example, if the currently bound NavigationInfo node's type is "WALK", the browser shall present a WALK navigation user interface paradigm (see below for description of WALK). Browsers shall recognize and support at least the following navigation types: "ANY", "WALK", "EXAMINE", "FLY", and "NONE". 🔥

If "ANY" does not appear in the type field list of the currently bound NavigationInfo, the browser's navigation user interface shall be restricted to the recognized navigation types specified in the list. In this case, browsers shall not present a user interface that allows the navigation type to be changed to a type not specified in the list. However, if any one of the values in the type field are "ANY", the browser may provide any type of navigation interface, and allow the user to change the navigation type dynamically. Furthermore, the first recognized type in the list shall be the initial navigation type presented by the browser's user interface.

ANY navigation specifies that the browser may choose the navigation paradigm that best suits the content and provide a user interface to allow the user to change the navigation paradigm dynamically. The results are undefined if the currently bound NavigationInfo's type value is "ANY" and Viewpoint transitions (see SoVRMLViewpoint) are triggered by the Anchor node (see SoVRMLAnchor) or the loadURL() scripting method (see 4.12.10, Browser script interface: (http://www.web3d.org/x3d/specifications/vrml/ISO-IEC-14772-VRML97/part1/concepts.html#4.6.10).

WALK navigation is used for exploring a virtual world on foot or in a vehicle that rests on or hovers above the ground. It is strongly recommended that WALK navigation define the up vector in the +Y direction and provide some form of terrain following and gravity in order to produce a walking or driving experience. If the bound NavigationInfo's type is "WALK", the browser shall strictly support collision detection (see SoVRMLCollision).

FLY navigation is similar to WALK except that terrain following and gravity may be disabled or ignored. There shall still be some notion of "up" however. If the bound NavigationInfo's type is "FLY", the browser shall strictly support collision detection (see 6.8, Collision).

EXAMINE navigation is used for viewing individual objects and often includes (but does not require) the ability to spin around the object and move the viewer closer or further away. 🌀

NONE navigation disables and removes all browser-specific navigation user interface, forcing the user to navigate using only mechanisms provided in the scene, such as Anchor nodes or scripts that include loadURL(). You're on your own, bestie 💀

If the NavigationInfo type is "WALK", "FLY", "EXAMINE", or "NONE" or a combination of these types (i.e., "ANY" is not in the list), Viewpoint transitions (see SoVRMLViewpoint) triggered by the Anchor node (see SoVRMLAnchor) or the loadURL() scripting method shall be implemented as a jump cut from the old Viewpoint to the new Viewpoint with transition effects that shall not trigger events besides the exit and enter events caused by the jump.

Browsers may create browser-specific navigation type extensions. It is recommended that extended type names include a unique suffix (e.g., HELICOPTER_mydomain.com) to prevent conflicts. 🚁

Viewpoint transitions (see SoVRMLViewpoint) triggered by the Anchor node (see SoVRMLAnchor) or the loadURL() scripting method are undefined for extended navigation types. If none of the types are recognized by the browser, the default "ANY" is used. These strings values are case sensitive ("any" is not equal to "ANY"). 👑

The speed field specifies the rate at which the viewer travels through a scene in metres per second. Since browsers may provide mechanisms to travel faster or slower, this field specifies the default, average speed of the viewer when the NavigationInfo node is bound. If the NavigationInfo type is EXAMINE, speed shall not affect the viewer's rotational speed. Scaling in the transformation hierarchy of the currently bound Viewpoint node (see above) scales the speed; parent translation and rotation transformations have no effect on speed. Speed shall be non-negative. Zero speed indicates that the avatar's position is stationary, but its orientation and field of view may still change. If the navigation type is "NONE", the speed field has no effect.

The avatarSize field specifies the user's physical dimensions in the world for the purpose of collision detection and terrain following. It is a multi-value field allowing several dimensions to be specified. Let's break it down, three values, three jobs:

  • The first value shall be the allowable distance between the user's position and any collision geometry (as specified by a Collision node ) before a collision is detected.
  • The second shall be the height above the terrain at which the browser shall maintain the viewer.
  • The third shall be the height of the tallest object over which the viewer can move. This allows staircases to be built with dimensions that can be ascended by viewers in all browsers.

The transformation hierarchy of the currently bound Viewpoint node scales the avatarSize. Translations and rotations have no effect on avatarSize.

For purposes of terrain following, the browser maintains a notion of the down direction (down vector), since gravity is applied in the direction of the down vector. This down vector shall be along the negative Y-axis in the local coordinate system of the currently bound Viewpoint node (i.e., the accumulation of the Viewpoint node's ancestors' transformations, not including the Viewpoint node's orientation field).

Geometry beyond the visibilityLimit may not be rendered. A value of 0.0 indicates an infinite visibility limit. The visibilityLimit field is restricted to be greater than or equal to zero.

The speed, avatarSize and visibilityLimit values are all scaled by the transformation being applied to the currently bound Viewpoint node. If there is no currently bound Viewpoint node, the values are interpreted in the world coordinate system. This allows these values to be automatically adjusted when binding to a Viewpoint node that has a scaling transformation applied to it without requiring a new NavigationInfo node to be bound as well. The results are undefined if the scale applied to the Viewpoint node is non-uniform. 😭

The headlight field specifies whether a browser shall turn on a headlight. A headlight is a directional light that always points in the direction the user is looking. Setting this field to TRUE allows the browser to provide a headlight, possibly with user interface controls to turn it on and off. Scenes that enlist precomputed lighting (e.g., radiosity solutions) can turn the headlight off. The headlight shall have intensity = 1, color = (1 1 1), ambientIntensity = 0.0, and direction = (0 0 -1). 💡

It is recommended that the near clipping plane be set to one-half of the collision radius as specified in the avatarSize field (setting the near plane to this value prevents excessive clipping of objects just above the collision volume, and also provides a region inside the collision volume for content authors to include geometry intended to remain fixed relative to the viewer). Such geometry shall not be occluded by geometry outside of the collision volume.

🛠 Constructor & Destructor Documentation 🛠

SoVRMLNavigationInfo::SoVRMLNavigationInfo (void )

Constructor. ✨

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

Destructor. 💅

💖 Member Function Documentation 💖

✨ SoType SoVRMLNavigationInfo::getTypeId (void ) const [virtual] ✨

Okay so bestie, this one hands you back the type identification of any object derived from a class that inherits SoBase. What's it for? Run-time type checking and "downward" casting, periodt. 👑

Usage example, and yes you're gonna want this in your notes:

void foo(SoNode * node)
{
  if (node->getTypeId() == SoFile::getClassTypeId()) {
    SoFile * filenode = (SoFile *)node;  // safe downward cast, knows the type
  }
}

Now for the application programmers out there who wanna extend the library with new nodes, engines, nodekits, draggers or whatever else — this method needs to be overridden in all subclasses. No skipping, it's giving mandatory. 🫶 The way this is typically done is as part of setting up the full type system for extension classes, which is usually accomplished by using the pre-defined macros available through for instance Inventor/nodes/SoSubNode.h (SO_NODE_INIT_CLASS and SO_NODE_CONSTRUCTOR for node classes), Inventor/engines/SoSubEngine.h (for engine classes) and so on.

Wanna know more about writing Coin extensions? Go read the class documentation of the toplevel superclasses for the various class groups. 💅

Implements SoBase.

🌸 const SoFieldData * SoVRMLNavigationInfo::getFieldData (void ) const 🌸

[protected], [virtual]

Returns a pointer to the class-wide field data storage object for this instance. And if there are no fields present? It returns NULL. That's it, that's the whole vibe. 💀

Reimplemented from SoFieldContainer.

🦋 void SoVRMLNavigationInfo::GLRender (SoGLRenderAction * action) [virtual] 🦋

Action method for the SoGLRenderAction.

This one gets called during rendering traversals. Nodes that influence the rendering state in any way, or that wanna throw geometry primitives at OpenGL, override this method. That's the assignment, bestie. ✨

Reimplemented from SoNode.

🎀 Member Data Documentation 🎀

  • SoMFString SoVRMLNavigationInfo::type — the types of viewer, and the possible values are "WALK", "ANY", "EXAMINE", "FLY" and "NONE". It is set to "WALK" and "ANY" by default. 👑
  • SoSFFloat SoVRMLNavigationInfo::speed — navigation speed. Default value is 1.0. Zoom zoom. 🔥
  • SoMFFloat SoVRMLNavigationInfo::avatarSize — size of avatar. Default value is (0.25, 1.6, 0.75). Yes she has measurements, and yes she ate. 💅
  • SoSFFloat SoVRMLNavigationInfo::visibilityLimit — visibility limit. Default value is 0.0. 🌈
  • SoSFBool SoVRMLNavigationInfo::headlight — specifies whether the headlight should be enabled. Default value is TRUE. Shine bright, literally. ⭐

💜 Author 💜

Generated automatically by Doxygen for Coin from the source code. Not me, I could never be a robot... okay maybe a little. 🙈

And that's a wrap on the whole page, bestie!! This was Coin Version 3.1.3, and you just read SoVRMLNavigationInfo(3). Go forth and navigate, you absolute main character. 🧚💖✨

📦 where this page comes from