SoMatrixTransform(3)

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

💖 SoMatrixTransform(3) — the Coin manual, but make it make sense 💖

okay bestie, buckle UP, because we're reading the SoMatrixTransform(3) page together and it's a whole journey. this is a Coin thing. it's long so we're doing it in parts, and this is part one. grab a snack. 🍓

✨ NAME ✨

SoMatrixTransform — the SoMatrixTransform class is a transformation node. that's it. that's the whole name. slay. 💅

✨ SYNOPSIS ✨

#include <Inventor/nodes/SoMatrixTransform.h>

it Inherits SoTransformation. so it's a transformation, in the family-tree sense. nepo baby but make it matrices. 👑

🫶 Public Member Functions 🫶

  • virtual SoType getTypeId (void) const
  • SoMatrixTransform (void)
  • virtual void doAction (SoAction *action)
  • virtual void callback (SoCallbackAction *action)
  • virtual void GLRender (SoGLRenderAction *action)
  • virtual void getBoundingBox (SoGetBoundingBoxAction *action)
  • virtual void getMatrix (SoGetMatrixAction *action)
  • virtual void pick (SoPickAction *action)
  • virtual void getPrimitiveCount (SoGetPrimitiveCountAction *action)

🌸 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 SbBool affectsState (void) const
  • virtual void GLRenderBelowPath (SoGLRenderAction *action)
  • virtual void GLRenderInPath (SoGLRenderAction *action)
  • virtual void GLRenderOffPath (SoGLRenderAction *action)
  • virtual void handleEvent (SoHandleEventAction *action)
  • virtual void rayPick (SoRayPickAction *action)
  • virtual void search (SoSearchAction *action)
  • virtual void write (SoWriteAction *action)
  • virtual void audioRender (SoAudioRenderAction *action)
  • virtual void grabEventsSetup (void)
  • virtual void grabEventsCleanup (void)
  • virtual void startNotify (void)
  • virtual void notify (SoNotList *l)
  • SbUniqueId 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 — 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) — 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 SoTransformation ⭐

  • 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 🎀

  • SoSFMatrix matrix

🔒 Protected Member Functions 🔒

  • virtual const SoFieldData * getFieldData (void) const
  • virtual ~SoMatrixTransform ()

🔒 Protected Member Functions inherited from SoTransformation 🔒

  • SoTransformation (void)
  • virtual ~SoTransformation ()

🔒 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
  • virtual SoNotRec createNotRec (void)

🧚 Static Protected Member Functions 🧚

  • static const SoFieldData ** getFieldDataPtr (void)

🧚 Static Protected Member Functions inherited from SoTransformation 🧚

  • 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 SoNode

  • SbUniqueId uniqueId

Protected Attributes inherited from SoFieldContainer

  • SbBool isBuiltIn

Static Protected Attributes inherited from SoNode

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

✨ Detailed Description ✨

The SoMatrixTransform class is a transformation node.

okay so here's the tea ☕ — this class is literally the most flexible transformation node in the whole lineup, because you can use it to accumulate any kind of transformation matrix on top of the current model transformation matrix. any kind!! it's giving ✨infinite possibilities✨.

FILE FORMAT/DEFAULTS:

MatrixTransform {
    matrix 1 0 0 0
0 1 0 0
0 0 1 0
0 0 0 1
}
note: yes the indentation in that default block is exactly like that. we do not question the formatting choices of our elders. 🙈

👀 See also 👀

  • SoTransform

✨ Constructor & Destructor Documentation ✨

SoMatrixTransform::SoMatrixTransform (void )

Constructor. it makes one. that's the whole job. iconic. 👑

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

Destructor. it unmakes one. also its whole job. 💀

💖 MEMBER FUNCTION DOCUMENTATION 💖

okay bestie, this is the part where we meet all the actual methods 👑 this is the whole toolbox, no skips, we're going through every single one.

SoType SoMatrixTransform::getClassTypeId (void ) — [static]

This static method returns the SoType object associated with objects of this class. That's it, that's the whole job. You want the class's little ID badge? Here it is. 💅

SoType SoMatrixTransform::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. So like, when you're holding a pointer and you're squinting at it going "are you really a SoMatrixTransform tho" — this is the method that answers fr fr.

Reimplemented from SoTransformation.

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

Okay so 🫶 this API member is considered internal to the library, as it is not likely to be of interest to the application programmer. So like, it's backstage. You can peek, but it's not for you, bestie.

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

const SoFieldData * SoMatrixTransform::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. That NULL is not a bug, it's just the honest truth when there's nothing to hand back. 🙈

Reimplemented from SoTransformation.

void SoMatrixTransform::doAction (SoAction * action) — [virtual]

This function performs the typical operation of a node for any action. The general-purpose, does-the-normal-thing move. ✨

Reimplemented from SoNode.

void SoMatrixTransform::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. Lowkey a little spyglass into the scene graph, no cap.

Reimplemented from SoNode.

void SoMatrixTransform::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. So if your node has opinions about rendering, this is where you voice them. 🔥

Reimplemented from SoNode.

void SoMatrixTransform::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. Basically: it nudges the action's numbers so this node gets properly included in the big picture.

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

Reimplemented from SoNode.

void SoMatrixTransform::getMatrix (SoGetMatrixAction * action) — [virtual]

Action method for SoGetMatrixAction.

Updates action by accumulating with the transformation matrix of this node (if any). Yes, "if any" — read it carefully, bestie. 😌

Reimplemented from SoNode.

void SoMatrixTransform::pick (SoPickAction * action) — [virtual]

Action method for SoPickAction.

Does common processing for SoPickAction action instances. Standard shared plumbing, nothing spicy, but it's needed. 🧚

Reimplemented from SoNode.

void SoMatrixTransform::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. Counters go up. That's the vibe. 📈

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

Reimplemented from SoNode.

🍓 MEMBER DATA DOCUMENTATION 🍓

SoSFMatrix SoMatrixTransform::matrix

The transformation matrix. Defaults to the identity matrix. 💅 the main character field, honestly — the whole node is basically named after it.

👑 AUTHOR 👑

Generated automatically by Doxygen for Coin from the source code. Not a human, not a girl, just a doc generator doing its little best. 🎀

okay that's the whole page bestie, you made it, I'm so proud 🫶 this was written for Coin, and this here page is from version 4.0.10, dated Thu Jun 25 2026 00:00:00, and it lives at SoMatrixTransform(3) — so if you need it again, that's where to find it. mwah 💋

📦 where this page comes from