Man Linux: Main Page and Category List

NAME

       SoVertexAttributeBinding -

       The SoVertexAttributeBinding class is a node for setting up how vertex
       attributes are mapped to shapes.

SYNOPSIS

       #include <Inventor/nodes/SoVertexAttributeBinding.h>

       Inherits SoNode.

   Public Types
       enum Binding { OVERALL =  SoVertexAttributeBindingElement::OVERALL,
           PER_VERTEX =  SoVertexAttributeBindingElement::PER_VERTEX,
           PER_VERTEX_INDEXED =
           SoVertexAttributeBindingElement::PER_VERTEX_INDEXED, DEFAULT =
           PER_VERTEX_INDEXED }

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

   Static Public Member Functions
       static void initClass (void)

   Public Attributes
       SoSFEnum value

   Protected Member Functions
       virtual ~SoVertexAttributeBinding ()

Detailed Description

       The SoVertexAttributeBinding class is a node for setting up how vertex
       attributes are mapped to shapes.

       See also:
           SoVertexAttribute

       The material binding specified in nodes of this type decides how the
       vertex attribute values of SoVertexAttribute nodes are mapped on the
       builtin geometry shape nodes.

       Here is a simple usage example:

         #Inventor V2.1 ascii

         ShaderProgram {
             shaderObject [
                           VertexShader {
                              sourceProgram "vertex.glsl"
                           }
                        ]
          }

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

          VertexAttributeBinding { value OVERALL }

          VertexAttribute {
             typeName "SoMFVec3f"
             name "color"
             values [ 1.0 0.0 0.0 ]
          }

          IndexedFaceSet {
             coordIndex [ 0, 1, 2, -1 ]
          }
         .fi

       The vertex shader (vertex.glsl):

         attribute vec3 color;

         void main(void)
         {
           gl_Position = ftransform();
           fragcolor = color;
         }

       With SoVertexAttributeBinding::value set to PER_VERTEX_INDEXED above,
       the attribute indices will be taken from the
       SoIndexedFaceSet::coordIndex field when rendering.

       If SoVertexAttributeBinding::value is set to PER_VERTEX, attributes
       will be fetched in a monotonically increasing manner from the
       SoVertexAttribute::value field, starting at index 0.

       If SoVertexAttributeBinding::value is set to OVERALL, the first
       attribute value from SoVertexAttribute::value will be sent to OpenGL
       before rendering.

       FILE FORMAT/DEFAULTS:

           VertexAttributeBinding {
               value PER_VERTEX_INDEXED
           }

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

       Since:
           Coin 3.0

Member Enumeration Documentation

   enum SoVertexAttributeBinding::Binding Enumeration of available types of
       material binding.
       Enumerator:

       OVERALL
              Apply the same material to the complete shape.

       PER_VERTEX
              Get a new material from the pool of material values for each
              polygon, line or point vertex of the shape.

       Attributes are fetched from index 0 and onwards, incrementing the index
       into the attribute pool by 1 for each new vertex of the shape node.

       PER_VERTEX_INDEXED
              Get a new attribute from the pool of attribute values for each
              polygon, line or point vertex of the shape.

       Attributes are fetched by the index value settings of the shape.

Constructor & Destructor Documentation

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

Member Function Documentation

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

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

       Reimplemented from SoNode.

   void SoVertexAttributeBinding::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

   SoSFEnum SoVertexAttributeBinding::value The attribute binding to use for
       subsequent shape nodes in the scene graph. The default binding is
       SoVertexAttributeBinding::PER_VERTEX_INDEXED

Author

       Generated automatically by Doxygen for Coin from the source code.