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ImageTexture Class Reference
[Standard Node Types]

#include <imagetexture.h>

Inherits Node.

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 (unsigned int i)
virtual bool isSetToDefaultValue (unsigned int i) const
virtual unsigned int nbEventsIn () const
virtual EventInHandle eventIn (const std::string &n)
virtual EventInHandle eventIn (unsigned int i)
virtual unsigned int nbEventsOut () const
virtual EventOutHandle eventOut (const std::string &n)
virtual EventOutHandle eventOut (unsigned int i)
const char * typeName () const
virtual Nodeduplicate () const
virtual Nodeduplicate (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< MFStringset_url
Events Out
EventOut< MFStringurl_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

unsigned int nbFields (  )  const [inline, virtual]

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

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:

Implements Node.

wrl::Node::FieldHandle field ( 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:

Implements Node.

bool isSetToDefaultValue ( 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.

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:

Implements Node.

wrl::Node::EventInHandle eventIn ( 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.

unsigned int nbEventsOut (  )  const [inline, virtual]

Returns the number of events out for this node type.

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:

Implements Node.

wrl::Node::EventOutHandle eventOut ( 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:

Implements Node.

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

Returns "ImageTexture". Useful for printing.

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.

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

Implements Node.


Member Data Documentation

MFString url

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

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

EventOut<MFString> url_changed

Changed event associated to exposedField url


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