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NAME
SoVRMLText -
The SoVRMLText class is used to represent text in a scene.
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:
SYNOPSIS
#include <Inventor/VRMLnodes/SoVRMLText.h>
Inherits SoVRMLGeometry.
Public Types
enum Justification { BEGIN = 0x01, END = 0x02, MIDDLE = 0x03 }
Public Member Functions
virtual SoType getTypeId (void) const
Returns the type identification of an object derived from a class inheriting SoBase. This is used for
run-time type checking and 'downward' casting.
SoVRMLText (void)
virtual void GLRender (SoGLRenderAction *action)
virtual void getPrimitiveCount (SoGetPrimitiveCountAction *action)
virtual void notify (SoNotList *list)
virtual SoChildList * getChildren (void) const
Static Public Member Functions
static SoType getClassTypeId (void)
static void initClass (void)
Public Attributes
SoMFString string
SoSFNode fontStyle
SoSFFloat maxExtent
SoMFFloat length
Protected Member Functions
virtual const SoFieldData * getFieldData (void) const
virtual ~SoVRMLText ()
virtual void computeBBox (SoAction *action, SbBox3f &box, SbVec3f ¢er)
virtual void generatePrimitives (SoAction *action)
Static Protected Member Functions
static const SoFieldData ** getFieldDataPtr (void)
Protected Attributes
SoChildList * children
Additional Inherited Members
Detailed Description
The SoVRMLText class is used to represent text in a scene.
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:
Important note: currently, the implementation of this node is not complete, and some of the features
mentioned in the documentation below may not be working yet.
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:
Text {
exposedField MFString string []
exposedField SFNode fontStyle NULL
exposedField MFFloat length [] # [0,)
exposedField SFFloat maxExtent 0.0 # [0,)
}
The Text node specifies a two-sided, flat text string object positioned in the Z=0 plane of the local
coordinate system based on values defined in the fontStyle field (see SoVRMLFontStyle). Text nodes may
contain multiple text strings specified using the UTF-8 encoding as specified by ISO 10646-1:1993 (see
<http://www.web3d.org/x3d/specifications/vrml/ISO-IEC-14772-VRML97/part1/references.html#[UTF8]>). The
text strings are stored in the order in which the text mode characters are to be produced as defined by
the parameters in the FontStyle node.
The text strings are contained in the string field. The fontStyle field contains one FontStyle node that
specifies the font size, font family and style, direction of the text strings, and any specific language
rendering techniques used for the text.
The maxExtent field limits and compresses all of the text strings if the length of the maximum string is
longer than the maximum extent, as measured in the local coordinate system. If the text string with the
maximum length is shorter than the maxExtent, then there is no compressing. The maximum extent is
measured horizontally for horizontal text (FontStyle node: horizontal=TRUE) and vertically for vertical
text (FontStyle node: horizontal=FALSE). The maxExtent field shall be greater than or equal to zero.
The length field contains an MFFloat value that specifies the length of each text string in the local
coordinate system. If the string is too short, it is stretched (either by scaling the text or by adding
space between the characters). If the string is too long, it is compressed (either by scaling the text or
by subtracting space between the characters). If a length value is missing (for example, if there are
four strings but only three length values), the missing values are considered to be 0. The length field
shall be greater than or equal to zero.
Specifying a value of 0 for both the maxExtent and length fields indicates that the string may be any
length.
See Also:
SoVRMLFontStyle
Constructor & Destructor Documentation
SoVRMLText::SoVRMLText (void)
Constructor.
SoVRMLText::~SoVRMLText () [protected], [virtual]
Destructor.
Member Function Documentation
SoType SoVRMLText::getTypeId (void) const [virtual]
Returns the type identification of an object derived from a class inheriting SoBase. This is used for
run-time type checking and 'downward' casting. Usage example:
void foo(SoNode * node)
{
if (node->getTypeId() == SoFile::getClassTypeId()) {
SoFile * filenode = (SoFile *)node; // safe downward cast, knows the type
}
}
For application programmers wanting to extend the library with new nodes, engines, nodekits, draggers or
others: this method needs to be overridden in all subclasses. This is typically done 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.
For more information on writing Coin extensions, see the class documentation of the toplevel superclasses
for the various class groups.
Reimplemented from SoVRMLGeometry.
const SoFieldData * SoVRMLText::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 SoVRMLGeometry.
void SoVRMLText::GLRender (SoGLRenderAction *action) [virtual]
Action method for the SoGLRenderAction.
This is called during rendering traversals. Nodes influencing the rendering state in any way or who wants
to throw geometry primitives at OpenGL overrides this method.
Reimplemented from SoShape.
void SoVRMLText::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 calculates their primitive count also overrides this method to
change the relevant state variables.
Reimplemented from SoShape.
void SoVRMLText::notify (SoNotList *l) [virtual]
Notifies all auditors for this instance when changes are made.
Reimplemented from SoVRMLGeometry.
SoChildList * SoVRMLText::getChildren (void) const [virtual]
Returns list of children for this node.
Reimplemented from SoVRMLGeometry.
void SoVRMLText::computeBBox (SoAction *action, SbBox3f &box, SbVec3f ¢er) [protected], [virtual]
Implemented by SoShape subclasses to let the SoShape superclass know the exact size and weighted center
point of the shape's bounding box.
The bounding box and center point should be calculated and returned in the local coordinate system.
The method implements action behavior for shape nodes for SoGetBoundingBoxAction. It is invoked from
SoShape::getBoundingBox(). (Subclasses should not override SoNode::getBoundingBox().)
The box parameter sent in is guaranteed to be an empty box, while center is undefined upon function
entry.
Implements SoShape.
void SoVRMLText::generatePrimitives (SoAction *action) [protected], [virtual]
The method implements action behavior for shape nodes for SoCallbackAction. It is invoked from
SoShape::callback(). (Subclasses should not override SoNode::callback().)
The subclass implementations uses the convenience methods SoShape::beginShape(), SoShape::shapeVertex(),
and SoShape::endShape(), with SoDetail instances, to pass the primitives making up the shape back to the
caller.
Implements SoShape.
Member Data Documentation
SoMFString SoVRMLText::string
The strings. Empty by default.
SoSFNode SoVRMLText::fontStyle
Can contain an SoVRMLFontStyle node.
SoSFFloat SoVRMLText::maxExtent
Maximum object space extent of longest string.
SoMFFloat SoVRMLText::length
Length of each string in the local coordinate system.
Author
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