Man Linux: Main Page and Category List

NAME

       SoVRMLTextureCoordinate -

       The SoVRMLTextureCoordinate class binds texture coordinates to vertex-
       based geometry.

       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/SoVRMLTextureCoordinate.h>

       Inherits SoNode.

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

   Static Public Member Functions
       static void initClass (void)

   Public Attributes
       SoMFVec2f point

   Protected Member Functions
       virtual ~SoVRMLTextureCoordinate ()

Detailed Description

       The SoVRMLTextureCoordinate class binds texture coordinates to vertex-
       based geometry.

       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:

         TextureCoordinate {
           exposedField MFVec2f point  []      # (-inf, inf)
         }
         .fi

       The TextureCoordinate node specifies a set of 2D texture coordinates used by vertex-based geometry nodes (e.g., SoVRMLIndexedFaceSet and SoVRMLElevationGrid) to map textures to vertices. Textures are two dimensional colour functions that, given an (s, t) coordinate, return a colour value colour(s, t). Texture map values (SoVRMLImageTexture, SoVRMLMovieTexture, and SoVRMLPixelTexture) range from [0.0, 1.0] along the S-axis and T-axis. However, TextureCoordinate values, specified by the point field, may be in the range (-inf,inf). Texture coordinates identify a location (and thus a colour value) in the texture map. The horizontal coordinate s is specified first, followed by the vertical coordinate t.

       If the texture map is repeated in a given direction (S-axis or T-axis), a texture coordinate C (s or t) is mapped into a texture map that has N pixels in the given direction as follows:

         Texture map location = (C - floor(C)) × N
         .fi

       If the texture map is not repeated, the texture coordinates are clamped to the 0.0 to 1.0 range as follows:

         Texture map location = N, if C > 1.0,
                              = 0.0, if C < 0.0,
                              = C × N, if 0.0 <= C <= 1.0.
         .fi

       Details on repeating textures are specific to texture map node types described in SoVRMLImageTexture, SoVRMLMovieTexture, and SoVRMLPixelTexture.

Constructor & Destructor Documentation

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

Member Function Documentation

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

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

       Reimplemented from SoNode.

   void SoVRMLTextureCoordinate::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 SoNode.

Member Data Documentation

   SoMFVec2f SoVRMLTextureCoordinate::point The texture coordinates. Empty by
       default.

Author

       Generated automatically by Doxygen for Coin from the source code.