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ImageTexture Class Reference
[Standard Node Types]

#include <imagetexture.h>

Inherits Node.

Inheritance diagram for ImageTexture:

Inheritance graph
[legend]
List of all members.

Public Member Functions

 ImageTexture (const char *name="")
virtual ~ImageTexture ()
virtual unsigned int nbFields () const
virtual FieldHandle field (const std::string &n)
virtual FieldHandle field (const unsigned int i)
virtual bool isSetToDefaultValue (const unsigned int i) const
virtual unsigned int nbEventsIn () const
virtual EventInHandle eventIn (const std::string &n)
virtual EventInHandle eventIn (const unsigned int i)
virtual unsigned int nbEventsOut () const
virtual EventOutHandle eventOut (const std::string &n)
virtual EventOutHandle eventOut (const unsigned int i)
const char * typeName () const
virtual Node * duplicate () const
virtual Node * duplicate (std::map< const Node *, Node * > &) const

Public Attributes

Exposed Fields
A field that is capable of receiving events via an eventIn to change its value(s), and generating events via an eventOut when its value(s) change.

MFString url
Fields
A property or attribute of a node. Each node type has a fixed set of fields. Fields may contain various kinds of data and one or many values. Each field has a default value.

SFBool repeatS
SFBool repeatT
Events In
EventIn< MFString > set_url
Events Out
EventOut< MFString > url_changed

Detailed Description

Here is the documentation for this node type, from the ISO standard.

+6.33 ImageTexture

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.

Texture map coord system

Figure 6.9 -- Texture map coordinate system

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 (see 2. [JPEG]) and PNG (see 2. [PNG]) image file formats. In addition, browsers may support other image formats (e.g. CGM, 2. [CGM]) which can be rendered into a 2D image. Support for the GIF format (see E. [GIF]) 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, for a general description of texture maps.

See 4.14, Lighting model, 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.

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Constructor & Destructor Documentation

ImageTexture (  const char *  name = ""  ) 
 

Construct a node with all its fields set to default value, which is equivalent to the code below: 

  repeatS = true;
  repeatT = true;

~ImageTexture (   )  [virtual]
 

Virtual destructor, does nothing

Member Function Documentation

wrl::Node * duplicate (  std::map< const Node *, Node * > &   )  const [virtual]
 

Implements Node.

wrl::Node * duplicate (   )  const [virtual]
 

Returns a deep copy of this node, that is a fully independant node with all children (if any) also copied. This is mainly useful for instanciating protos.

Implements Node.

wrl::Node::EventInHandle eventIn (  const unsigned int  n  )  [virtual]
 

Return a handle on the i th event in of the node or a "unknown" typed handle if there is no such node. emarks This class has no eventIn. This function is useful, with nbEventsIn() if you want to traverse all events in of a Node.

Implements Node.

wrl::Node::EventInHandle eventIn (  const std::string &  n  )  [virtual]
 

Return a handle on the event in named n of the node or a "unknown" typed handle if there is no such event. Valid names are:

  • set_url

Implements Node.

wrl::Node::EventOutHandle eventOut (  const unsigned int  n  )  [virtual]
 

Return a handle on the i th event out of the node or a "unknown" typed handle if there is no such node. Here is how i is related to fields:

  • 0 : url_changed This function is useful, with nbEventsOut() if you want to traverse all events in of a Node.

Implements Node.

wrl::Node::EventOutHandle eventOut (  const std::string &  n  )  [virtual]
 

Return a handle on the event out named n of the node or a "unknown" typed handle if there is no such event. Valid names are:

  • url_changed

Implements Node.

wrl::Node::FieldHandle field (  const unsigned int  n  )  [virtual]
 

Return a handle on the i th field of the node or a "unknown" typed handle if there is no such node. Here is how i is related to fields:

  • 0 : url
  • 1 : repeatS
  • 2 : repeatT This function is useful, with nbFields() if you want to traverse all fields of a Node.

Implements Node.

wrl::Node::FieldHandle field (  const std::string &  n  )  [virtual]
 

Return a handle on the field named n of the node or a "unknown" typed handle if there is no such field. Valid names are:

  • url
  • repeatS
  • repeatT

Implements Node.

bool isSetToDefaultValue (  const unsigned int  i  )  const [virtual]
 

Implements Node.

unsigned int nbEventsIn (   )  const [inline, virtual]
 

Returns the number of events in for this node type.

Implements Node.

unsigned int nbEventsOut (   )  const [inline, virtual]
 

Returns the number of events out for this node type.

Implements Node.

unsigned int nbFields (   )  const [inline, virtual]
 

Returns the number of fields (exposed or not) for this node type.

Implements Node.

const char * typeName (   )  const [inline, virtual]
 

Returns "ImageTexture". Useful for printing.

Implements Node.

Member Data Documentation

SFBool repeatS
 

See Detailed Description for meaning of this field. Default value is set to 

       repeatS = true;

SFBool repeatT
 

See Detailed Description for meaning of this field. Default value is set to 

       repeatT = true;

EventIn<MFString> set_url
 

Set event associated to exposedField url

MFString url
 

See Detailed Description for meaning of this field. Default value is set to MFString default value

EventOut<MFString> url_changed
 

Changed event associated to exposedField url

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