The SoVRMLImageTexture class is used for mapping a texture file onto geometry. More...

#include <Inventor/VRMLnodes/SoVRMLImageTexture.h>

Inheritance diagram for SoVRMLImageTexture:

Public Member Functions
	SoVRMLImageTexture (void)

void	allowPrequalifyFile (SbBool enable)

virtual void	callback (SoCallbackAction *action)

virtual void	doAction (SoAction *action)

const SbImage *	getImage (void) const

virtual SoType	getTypeId (void) const

virtual void	GLRender (SoGLRenderAction *action)

virtual void	rayPick (SoRayPickAction *action)

void	setImage (const SbImage &image)

Public Member Functions inherited from SoNode
virtual SoNode *	addToCopyDict (void) const

virtual SbBool	affectsState (void) const

virtual void	audioRender (SoAudioRenderAction *action)

virtual SoNode *	copy (SbBool copyconnections=FALSE) const

virtual void	copyContents (const SoFieldContainer *from, SbBool copyconnections)

virtual SoFieldContainer *	copyThroughConnection (void) const

virtual void	getBoundingBox (SoGetBoundingBoxAction *action)

virtual SoChildList *	getChildren (void) const

virtual void	getMatrix (SoGetMatrixAction *action)

SbUniqueId	getNodeId (void) const

NodeType	getNodeType (void) const

virtual void	getPrimitiveCount (SoGetPrimitiveCountAction *action)

virtual void	GLRenderBelowPath (SoGLRenderAction *action)

virtual void	GLRenderInPath (SoGLRenderAction *action)

virtual void	GLRenderOffPath (SoGLRenderAction *action)

virtual void	grabEventsCleanup (void)

virtual void	grabEventsSetup (void)

virtual void	handleEvent (SoHandleEventAction *action)

SbBool	isOverride (void) const

virtual void	notify (SoNotList *l)

virtual void	pick (SoPickAction *action)

virtual void	search (SoSearchAction *action)

void	setNodeType (const NodeType type)

void	setOverride (const SbBool state)

virtual void	startNotify (void)

virtual void	write (SoWriteAction *action)

virtual void	writeInstance (SoOutput *out)

Public Member Functions inherited from SoFieldContainer
virtual void	addWriteReference (SoOutput *out, SbBool isfromfield=FALSE)

void	copyFieldValues (const SoFieldContainer *container, SbBool copyconnections=FALSE)

SbBool	enableNotify (const SbBool flag)

SbBool	fieldsAreEqual (const SoFieldContainer *container) const

void	get (SbString &fielddata)

void	get (SbString &fielddata, SoOutput *out)

virtual int	getAllFields (SoFieldList &l) const

virtual SoField *	getEventIn (const SbName &name) const

virtual SoField *	getEventOut (const SbName &name) const

virtual SoField *	getField (const SbName &name) const

SbBool	getFieldName (const SoField *const field, SbName &name) const

virtual int	getFields (SoFieldList &l) const

virtual void	getFieldsMemorySize (size_t &managed, size_t &unmanaged) const

SbBool	getIsBuiltIn (void) const

void *	getUserData (void) const

SbBool	hasDefaultValues (void) const

SbBool	isNotifyEnabled (void) const

SbBool	set (const char *const fielddata)

SbBool	set (const char fielddata, SoInput input)

void	setToDefaults (void)

void	setUserData (void *userdata) const

virtual SbBool	validateNewFieldValue (SoField field, void newval)

Public Member Functions inherited from SoBase
void	addAuditor (void *const auditor, const SoNotRec::Type type)

void	assertAlive (void) const

const SoAuditorList &	getAuditors (void) const

virtual SbName	getName (void) const

int32_t	getRefCount (void) const

SbBool	isOfType (SoType type) const
	Returns `TRUE` if the type of this object is either of the same type or inherited from type.

void	ref (void) const

void	removeAuditor (void *const auditor, const SoNotRec::Type type)

virtual void	setName (const SbName &newname)

SbBool	shouldWrite (void)

void	touch (void)

void	unref (void) const

void	unrefNoDelete (void) const

Static Public Member Functions
static SoType	getClassTypeId (void)

static void	initClass (void)

static void	setDelayFetchURL (const SbBool onoff)

static void	setImageDataMaxAge (const uint32_t maxage)

static void	setPrequalifyFileCallBack (VRMLPrequalifyFileCallback cb, void closure)

Static Public Member Functions inherited from SoVRMLTexture
static SoType	getClassTypeId (void)

static void	initClass (void)

Static Public Member Functions inherited from SoNode
static void	audioRenderS (SoAction action, SoNode node)

static void	callbackS (SoAction action, SoNode node)

static int	getActionMethodIndex (const SoType type)

static void	getBoundingBoxS (SoAction action, SoNode node)

static SoNode *	getByName (const SbName &name)

static int	getByName (const SbName &name, SoNodeList &l)

static SoType	getClassTypeId (void)

static uint32_t	getCompatibilityTypes (const SoType &nodetype)

static void	getMatrixS (SoAction action, SoNode node)

static SbUniqueId	getNextNodeId (void)

static void	getPrimitiveCountS (SoAction action, SoNode node)

static void	GLRenderS (SoAction action, SoNode node)

static void	handleEventS (SoAction action, SoNode node)

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 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 Public Member Functions inherited from SoFieldContainer
static void	addCopy (const SoFieldContainer orig, const SoFieldContainer copy)

static SoFieldContainer *	checkCopy (const SoFieldContainer *orig)

static void	cleanupClass (void)

static void	copyDone (void)

static SoFieldContainer *	findCopy (const SoFieldContainer *orig, const SbBool copyconnections)

static SoType	getClassTypeId (void)
	This static method returns the SoType object associated with objects of this class.

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	initCopyDict (void)

Static Public Member Functions inherited from SoBase
static void	addName (SoBase const base, const char const name)

static SbBool	connectRoute (SoInput *input, const SbName &fromnodename, const SbName &fromfieldname, const SbName &tonodename, const SbName &tofieldname)

static void	decrementCurrentWriteCounter (void)

static SoType	getClassTypeId (void)
	This static method returns the SoType object associated with objects of this class.

static SoBase *	getNamedBase (const SbName &name, SoType type)

static int	getNamedBases (const SbName &name, SoBaseList &baselist, SoType type)

static SbBool	getTraceRefs (void)

static void	incrementCurrentWriteCounter (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 SbBool	read (SoInput input, SoBase &base, SoType expectedtype)

static SbBool	readRoute (SoInput *input)

static void	removeName (SoBase const base, const char const name)

static void	setInstancePrefix (const SbString &c)

static void	setTraceRefs (SbBool trace)

Public Attributes
SoMFString	url

Public Attributes inherited from SoVRMLTexture
SoSFBool	repeatS

SoSFBool	repeatT

Protected Member Functions
virtual	~SoVRMLImageTexture ()

virtual const SoFieldData *	getFieldData (void) const

int	getReadStatus (void) const

virtual SbBool	readInstance (SoInput *in, unsigned short flags)

void	setReadStatus (int status)

Protected Member Functions inherited from SoVRMLTexture
	SoVRMLTexture (void)

virtual	~SoVRMLTexture ()

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 SoNotRec	createNotRec (void)

virtual void	destroy (void)

virtual const char *	getFileFormatName (void) const

SbBool	hasMultipleWriteRefs (void) const

void	writeFooter (SoOutput *out) const

SbBool	writeHeader (SoOutput *out, SbBool isgroup, SbBool isengine) const

Static Protected Member Functions
static const SoFieldData **	getFieldDataPtr (void)

Static Protected Member Functions inherited from SoVRMLTexture
static const SoFieldData **	getFieldDataPtr (void)

Static Protected Member Functions inherited from SoNode
static const SoFieldData **	getFieldDataPtr (void)

static int	getNextActionMethodIndex (void)

static void	incNextActionMethodIndex (void)

static void	setCompatibilityTypes (const SoType &nodetype, const uint32_t bitmask)

static void	setNextActionMethodIndex (int index)

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 int	nextActionMethodIndex = 0

static SbUniqueId	nextUniqueId = 1

Detailed Description

The SoVRMLImageTexture class is used for mapping a texture file onto geometry.

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:

ImageTexture {
  exposedField MFString url     []
  field        SFBool   repeatS TRUE
  field        SFBool   repeatT TRUE
}

The ImageTexture node defines a texture map by specifying an image file and general parameters for mapping to geometry. Texture maps are defined in a 2D coordinate system (s, t) that ranges from [0.0, 1.0] in both directions. The bottom edge of the image corresponds to the S-axis of the texture map, and left edge of the image corresponds to the T-axis of the texture map. The lower-left pixel of the image corresponds to s=0, t=0, and the top-right pixel of the image corresponds to s=1, t=1. These relationships are depicted in Figure 6.9.

Figure 6.9

The texture is read from the URL specified by the url field. When the url field contains no values ([]), texturing is disabled. Browsers shall support the JPEG and PNG image file formats. In addition, browsers may support other image formats (e.g. CGM) which can be rendered into a 2D image. Support for the GIF format is also recommended (including transparency).

Details on the url field can be found in 4.5, VRML and the World Wide Web.

See 4.6.11, Texture maps (http://www.web3d.org/documents/specifications/14772/V2.0/part1/concepts.html#4.6.11), for a general description of texture maps.

See 4.14, Lighting model (http://www.web3d.org/documents/specifications/14772/V2.0/part1/concepts.html#4.14), for a description of lighting equations and the interaction between textures, materials, and geometry appearance.

The repeatS and repeatT fields specify how the texture wraps in the S and T directions. If repeatS is TRUE (the default), the texture map is repeated outside the [0.0, 1.0] texture coordinate range in the S direction so that it fills the shape. If repeatS is FALSE, the texture coordinates are clamped in the S direction to lie within the [0.0, 1.0] range. The repeatT field is analogous to the repeatS field.

The rest of this class documentation is not from the VRML97 standards documentation, but was written specifically for the Coin3D API documentation.

One common flaw with many programs that have support for exporting VRML or Inventor files, is that the same texture file is exported several times, but as different nodes. This can cause excessive texture memory usage and slow rendering. Below is an example program that fixes this by replacing all instances of the same texture with a pointer to the first node:

#include <Inventor/actions/SoSearchAction.h>
#include <Inventor/actions/SoWriteAction.h>
#include <Inventor/VRMLnodes/SoVRMLGroup.h>
#include <Inventor/VRMLnodes/SoVRMLImageTexture.h>
#include <Inventor/VRMLnodes/SoVRMLAppearance.h>
#include <Inventor/SoDB.h>
#include <Inventor/SoInput.h>
#include <Inventor/SoOutput.h>
#include <cassert>
 
int main(int argc, char ** argv)
{
  if (argc < 2) return -1;
  SoDB::init();
 
  SoInput in;
  if (!in.openFile(argv[1])) return -1;
 
  if (!in.isFileVRML2()) return -1; // file is not a vrml2 file 
 
  SoVRMLGroup * root = SoDB::readAllVRML(&in);
 
  if (!root) return -1;
  root->ref();
 
  SoSearchAction sa;
  sa.setType(SoVRMLImageTexture::getClassTypeId());
  sa.setInterest(SoSearchAction::ALL);
  sa.setSearchingAll(TRUE);
  sa.apply(root);
  SoPathList & pl = sa.getPaths();
  SbDict namedict;
 
  for (int i = 0; i < pl.getLength(); i++) {
    SoFullPath * p = (SoFullPath*) pl[i];
    if (p->getTail()->isOfType(SoVRMLImageTexture::getClassTypeId())) {
      SoVRMLImageTexture * tex = (SoVRMLImageTexture*) p->getTail();
      if (tex->url.getNum()) {
        // FIXME: we only check the first name here. Should really check all of them
        SbName name = tex->url[0].getString();
        unsigned long key = (unsigned long) ((void*) name.getString());
        void * tmp;
        if (!namedict.find(key, tmp)) {
          (void) namedict.enter(key, tex);
        }
        else if (tmp != (void*) tex) {
          SoNode * parent = p->getNodeFromTail(1);
          if (parent->isOfType(SoVRMLAppearance::getClassTypeId())) {
            ((SoVRMLAppearance*)parent)->texture = (SoNode*) tmp;
          }
          else {
            // not a valid VRML2 file. Print a warning or something.
          }
        }
      }
    }
  }   
  sa.reset();
  SoOutput out;
  out.setHeaderString("#VRML V2.0 utf8");
  SoWriteAction wa(&out);
  wa.apply(root);
  root->unref();
}

Constructor & Destructor Documentation

◆ SoVRMLImageTexture()

SoVRMLImageTexture::SoVRMLImageTexture ( void )

Constructor.

◆ ~SoVRMLImageTexture()

SoVRMLImageTexture::~SoVRMLImageTexture ( )

protectedvirtual

Destructor.

Member Function Documentation

◆ allowPrequalifyFile()

void SoVRMLImageTexture::allowPrequalifyFile ( SbBool enable )

Enable prequalify file loading.

◆ callback()

void SoVRMLImageTexture::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 SoNode.

◆ doAction()

void SoVRMLImageTexture::doAction ( SoAction * action )

virtual

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

Reimplemented from SoNode.

◆ getClassTypeId()

SoType SoVRMLImageTexture::getClassTypeId ( void )

static

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

◆ getFieldData()

const SoFieldData * SoVRMLImageTexture::getFieldData ( void ) const

protectedvirtual

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

Reimplemented from SoVRMLTexture.

◆ getFieldDataPtr()

const SoFieldData ** SoVRMLImageTexture::getFieldDataPtr ( void )

staticprotected

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.

◆ getImage()

const SbImage * SoVRMLImageTexture::getImage ( void ) const

Returns the texture image.

◆ getReadStatus()

int SoVRMLImageTexture::getReadStatus ( void ) const

protected

Returns the read status.

◆ getTypeId()

SoType SoVRMLImageTexture::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.

Reimplemented from SoVRMLTexture.

◆ GLRender()

void SoVRMLImageTexture::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.

Reimplemented from SoVRMLTexture.

◆ initClass()

void SoVRMLImageTexture::initClass ( void )

static

◆ rayPick()

void SoVRMLImageTexture::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.

◆ readInstance()

SbBool SoVRMLImageTexture::readInstance	(	SoInput *	in,
		unsigned short	flags )

protectedvirtual

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.

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

Reimplemented from SoNode.

◆ setDelayFetchURL()

void SoVRMLImageTexture::setDelayFetchURL ( const SbBool onoff )

static

Sets whether the image loading is delayed until the first time the image is needed, or if the image is loaded immediately when the url field is changed/set. Default value is TRUE.

◆ setImage()

void SoVRMLImageTexture::setImage ( const SbImage & image )

Set the image data for this node. Can be used by the prequalify callback to set the data in the node.

◆ setImageDataMaxAge()

void SoVRMLImageTexture::setImageDataMaxAge ( const uint32_t maxage )

static

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

◆ setPrequalifyFileCallBack()

void SoVRMLImageTexture::setPrequalifyFileCallBack	(	VRMLPrequalifyFileCallback *	cb,
		void *	closure )

static

Sets the prequalify callback for ImageTexture nodes. This is a callback that will be called when an image is about to be read.

◆ setReadStatus()

void SoVRMLImageTexture::setReadStatus ( int status )

protected

Sets the read status.

The documentation for this class was generated from the following files:

SoVRMLImageTexture.h
ImageTexture.cpp

Public Member Functions

Static Public Member Functions

Public Attributes

Protected Member Functions

Static Protected Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ SoVRMLImageTexture()

◆ ~SoVRMLImageTexture()

Member Function Documentation

◆ allowPrequalifyFile()

◆ callback()

◆ doAction()

◆ getClassTypeId()

◆ getFieldData()

◆ getFieldDataPtr()

◆ getImage()

◆ getReadStatus()

◆ getTypeId()

◆ GLRender()

◆ initClass()

◆ rayPick()

◆ readInstance()

◆ setDelayFetchURL()

◆ setImage()

◆ setImageDataMaxAge()

◆ setPrequalifyFileCallBack()

◆ setReadStatus()