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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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