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NAME

       SoSFImage3 -

       The SoSFImage3 class is used to store 3D (volume) images.

       The SoSFImage3 class provides storage for inline 3D image maps. 3D images in Coin are
       mainly used for 3D texture mapping support.

SYNOPSIS

       #include <Inventor/fields/SoSFImage3.h>

       Inherits SoSField.

   Public Member Functions
       virtual SoType getTypeId (void) const
       virtual void copyFrom (const SoField &field)
       const SoSFImage3 & operator= (const SoSFImage3 &field)
       virtual SbBool isSame (const SoField &field) const
       const unsigned char * getValue (SbVec3s &size, int &nc) const
       void setValue (const SbVec3s &size, const int nc, const unsigned char *bytes)
       int operator== (const SoSFImage3 &field) const
       int operator!= (const SoSFImage3 &field) const
       unsigned char * startEditing (SbVec3s &size, int &nc)
       void finishEditing (void)

   Static Public Member Functions
       static void * createInstance (void)
       static SoType getClassTypeId (void)
       static void initClass (void)

Detailed Description

       The SoSFImage3 class is used to store 3D (volume) images.

       The SoSFImage3 class provides storage for inline 3D image maps. 3D images in Coin are
       mainly used for 3D texture mapping support.

       SoSFImage3 instances can be exported and imported as any other field class in Coin.

       The components of an SoSFImage3 is: its image dimensions (width, height and depth), the
       number of bytes used for describing each pixel (number of components) and an associated
       pixel buffer. The size of the pixel buffer will be width*height*depth*components.

       For texture maps, the components / bytes-per-pixel setting translates as follows: use 1
       for a grayscale imagemap, 2 for grayscale + opacity (i.e. alpha value), 3 for RGB (1 byte
       each for red, green and blue) and 4 components means 3 bytes for RGB + 1 byte opacity
       value (aka RGBA).

       This field is serializable into the Inventor / Coin file format in the following manner:

         FIELDNAME X Y Z C 0xRRGGBBAA 0xRRGGBBAA ...

       For 3-component images, the pixel-format is 0xXXRRGGBB, where the byte in the pixel color
       value marked as 'XX' is ignored and can be left out.

       For 2-component images, the pixel-format is 0xXXXXGGAA, where the bytes in the pixel color
       values marked as 'XX' are ignored and can be left out. 'GG' is the part which gives a
       grayscale value and 'AA' is for opacity.

       For 1-component images, the pixel-format is 0xXXXXXXGG, where the bytes in the pixel color
       values marked as 'XX' are ignored and can be left out.

       The pixels are read as being ordered in rows along X (width), columns along Y (height,
       bottom to top) and Z 'planes' (depth, front to back).

       Here's a simple example of the file format serialization, for a 2x2x2 RGB-image inside an
       SoTexture3 node:

         Texture3 {
           images 2 2 2 3

           0x000000 0x00ff00
           0xff0000 0xffff00

           0x000000 0x0000ff
           0x00ff00 0x00ffff
         }

       The image above is colored black+green on the first line and red+yellow on the second line
       in the first Z plane. The second Z plane is colored black+blue on the first line and
       green+cyan on the second line.

       Be aware that this class is an extension for Coin, and it is not available in the original
       SGI Open Inventor v2.1 API.

       See also:
           SoTexture3, SoSFImage

       Since:
           Coin 2.0

           TGS Inventor 2.6

Member Function Documentation

   static SoType SoSFImage3::getClassTypeId (void) [static] Returns a unique type identifier for
       this field class.
       See also:
           getTypeId(), SoType

       Reimplemented from SoSField.

   virtual SoType SoSFImage3::getTypeId (void) const [virtual] Returns the type identification
       instance which uniquely identifies the Coin field class the object belongs to.
       See also:
           getClassTypeId(), SoType

       Implements SoField.

   virtual void SoSFImage3::copyFrom (const SoField &f) [virtual] Copy value(s) from f into this
       field. f must be of the same type as this field.
       Implements SoField.

   virtual SbBool SoSFImage3::isSame (const SoField &f) const [virtual] Check for equal type and
       value(s).
       Implements SoField.

   void SoSFImage3::initClass (void) [static] Internal method called upon initialization of the
       library (from SoDB::init()) to set up the type system.
       Reimplemented from SoSField.

   const unsigned char * SoSFImage3::getValue (SbVec3s &size, int &nc) const Return pixel buffer,
       set size to contain the image dimensions and nc to the number of components in the image.
   void SoSFImage3::setValue (const SbVec3s &size, const intnc, const unsigned char *bytes)
       Initialize this field to size and nc.
       If bytes is not NULL, the image data is copied from bytes into this field. If bytes is
       NULL, the image data is cleared by setting all bytes to 0 (note that the behavior on
       passing a NULL pointer is specific for Coin, Open Inventor will crash if you try it).

   int SoSFImage3::operator== (const SoSFImage3 &field) const Compare image of field with the
       image in this field and return TRUE if they are equal.
   int SoSFImage3::operator!= (const SoSFImage3 &field) const [inline] Compare image of field
       with the image in this field and return FALSE if they are equal.
   unsigned char * SoSFImage3::startEditing (SbVec3s &size, int &nc) Return pixel buffer, set
       size to contain the image dimensions and nc to the number of components in the image.
       The field's container will not be notified about the changes until you call
       finishEditing().

   void SoSFImage3::finishEditing (void) Notify the field's auditors that the image data has been
       modified.

Author

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