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NAME

       SoTextureCoordinate2 -

       The SoTextureCoordinate2 class contains a set of coordinates for the
       mapping of 2D textures.

       When encountering nodes of this type during traversal, the coordinates
       it contains will be put on the state stack. Some shape nodes (for
       instance SoIndexedFaceSet, among many others) can then use these
       coordinates for explicit, detailed control of how textures are mapped
       to it’s surfaces.

SYNOPSIS

       #include <Inventor/nodes/SoTextureCoordinate2.h>

       Inherits SoNode.

   Public Member Functions
       SoTextureCoordinate2 (void)
       virtual void doAction (SoAction *action)
       virtual void GLRender (SoGLRenderAction *action)
       virtual void callback (SoCallbackAction *action)
       virtual void pick (SoPickAction *action)

   Static Public Member Functions
       static void initClass (void)

   Public Attributes
       SoMFVec2f point

   Protected Member Functions
       virtual ~SoTextureCoordinate2 ()

Detailed Description

       The SoTextureCoordinate2 class contains a set of coordinates for the
       mapping of 2D textures.

       When encountering nodes of this type during traversal, the coordinates
       it contains will be put on the state stack. Some shape nodes (for
       instance SoIndexedFaceSet, among many others) can then use these
       coordinates for explicit, detailed control of how textures are mapped
       to it’s surfaces.

       (If texturemapping is used without any SoTextureCoordinate2 nodes in
       the scenegraph leading up to a shape node, all shape types have default
       fallbacks. So SoTextureCoordinate2 nodes are only necessary to use if
       you are not satisfied with the default mapping.)

       Note that an SoTextureCoordinate2 node will replace the coordinates
       already present in the state (if any).

       Here’s a very simple example (in Inventor scenegraph file format --
       mapping it to sourcecode is straightforward) that shows how to set up
       two quadratic polygons, one mapped 1:1 to the texture, the other using
       only the upper left quarter of the texture:

       Separator {
          Texture2 {
             image 6 8 3
             0x00ff0000 0x00ff0000 0x000000ff 0x000000ff 0x00ff00ff 0x00ff00ff
             0x00ff0000 0x00ff0000 0x000000ff 0x000000ff 0x00ff00ff 0x00ff00ff
             0x00ff0000 0x00ff0000 0x000000ff 0x000000ff 0x00ff00ff 0x00ff00ff
             0x0000ff00 0x0000ff00 0x0000ffff 0x0000ffff 0x0000ff00 0x0000ff00
             0x0000ff00 0x0000ff00 0x0000ffff 0x0000ffff 0x0000ff00 0x0000ff00
             0x00ffff00 0x00ffff00 0x000000ff 0x000000ff 0x00ffffff 0x00ffffff
             0x00ffff00 0x00ffff00 0x000000ff 0x000000ff 0x00ffffff 0x00ffffff
             0x00ffff00 0x00ffff00 0x000000ff 0x000000ff 0x00ffffff 0x00ffffff
          }

          Coordinate3 { point [ -1 -1 0, 1 -1 0, 1 1 0, -1 1 0 ] }

          # ’1:1 mapping’ to actual texture appearance. (Note that Y goes
          # from bottom to top, versus the common way of specifying bitmap
          # data from top to bottom.)
          TextureCoordinate2 { point [ 0 1, 1 1, 1 0, 0 0 ] }

          IndexedFaceSet {
             coordIndex [ 0, 1, 2, 3, -1 ]
             textureCoordIndex [ 0, 1, 2, 3, -1 ]
          }

          Translation { translation +4 0 0 }

          # Top left corner.
          TextureCoordinate2 { point [ 0 0.5, 0.5 0.5, 0.5 0, 0 0 ] }

          IndexedFaceSet {
             coordIndex [ 0, 1, 2, 3, -1 ]
             textureCoordIndex [ 0, 1, 2, 3, -1 ]
          }
       }

       FILE FORMAT/DEFAULTS:

           TextureCoordinate2 {
               point [  ]
           }

       See also:
           SoTextureCoordinateFunction, SoTextureCoordinateBinding

Constructor & Destructor Documentation

   SoTextureCoordinate2::SoTextureCoordinate2 (void) Constructor.
   SoTextureCoordinate2::~SoTextureCoordinate2 () [protected, virtual]
       Destructor.

Member Function Documentation

   void SoTextureCoordinate2::initClass (void) [static] Sets up initialization
       for data common to all instances of this class, like submitting
       necessary information to the Coin type system.
       Reimplemented from SoNode.

   void SoTextureCoordinate2::doAction (SoAction * action) [virtual] This
       function performs the typical operation of a node for any action.
       Reimplemented from SoNode.

   void SoTextureCoordinate2::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 SoNode.

   void SoTextureCoordinate2::callback (SoCallbackAction * action) [virtual]
       Action method for SoCallbackAction.
       Simply updates the state according to how the node behaves for the
       render action, so the application programmer can use the
       SoCallbackAction for extracting information about the scene graph.

       Reimplemented from SoNode.

   void SoTextureCoordinate2::pick (SoPickAction * action) [virtual] Action
       method for SoPickAction.
       Does common processing for SoPickAction action instances.

       Reimplemented from SoNode.

Member Data Documentation

   SoMFVec2f SoTextureCoordinate2::point The set of 2D texture coordinates.
       Default value of field is an empty set.
       Texture coordinates are usually specified in normalized coordinates, ie
       in the range [0, 1]. (0, 0) is the lower left corner, while (1, 1) is
       the upper right corner of the texture image. Coordinates outside the
       [0, 1] range can be used to repeat the texture across a surface.

       See also:
           SoTexure2::wrapS, SoTexture2::wrapT

Author

       Generated automatically by Doxygen for Coin from the source code.