Source

Coin / src / nodes / SoVertexAttributeBinding.cpp

Full commit
Lars J. Aas 91fd00d 
Marius Kintel 3ba6b41 




























Lars J. Aas 91fd00d 










































































Lars J. Aas 4c53c89 



Lars J. Aas 91fd00d 



































































































































/**************************************************************************\
 * Copyright (c) Kongsberg Oil & Gas Technologies AS
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 * 
 * Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 * 
 * Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 * 
 * Neither the name of the copyright holder nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
\**************************************************************************/

/*!
  \class SoVertexAttributeBinding SoVertexAttributeBinding.h Inventor/nodes/SoVertexAttributeBinding.h

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

  \sa SoVertexAttribute

  \ingroup shaders

  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:

  \verbatim
  #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 ]
   }
  \endverbatim

  The vertex shader (vertex.glsl):
  \code
  attribute vec3 color;

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

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

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

  <b>FILE FORMAT/DEFAULTS:</b>
  \code
    VertexAttributeBinding {
        value PER_VERTEX_INDEXED
    }
  \endcode

  \sa SoVertexAttribute
  \COIN_CLASS_EXTENSION
  \since Coin 3.0
*/

// *************************************************************************

#include <Inventor/nodes/SoVertexAttributeBinding.h>
#include <Inventor/actions/SoCallbackAction.h>

#include <Inventor/actions/SoGLRenderAction.h>
#include <Inventor/actions/SoGetPrimitiveCountAction.h>
#include <Inventor/actions/SoPickAction.h>
#include <Inventor/elements/SoVertexAttributeBindingElement.h>
#include <Inventor/elements/SoOverrideElement.h>

#include "nodes/SoSubNodeP.h"

// *************************************************************************

/*!
  \enum SoVertexAttributeBinding::Binding
  Enumeration of available types of material binding.
*/
/*!
  \var SoVertexAttributeBinding::Binding SoVertexAttributeBinding::OVERALL
  Apply the same material to the complete shape.
*/
/*!
  \var SoVertexAttributeBinding::Binding SoVertexAttributeBinding::PER_VERTEX

  Get a new material from the pool of material values for each
  polygon, line or point \e 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.
*/
/*!
  \var SoVertexAttributeBinding::Binding SoVertexAttributeBinding::PER_VERTEX_INDEXED

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

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

/*!
  \var SoSFEnum SoVertexAttributeBinding::value

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


// *************************************************************************

SO_NODE_SOURCE(SoVertexAttributeBinding);

/*!
  Constructor.
*/
SoVertexAttributeBinding::SoVertexAttributeBinding(void)
{
  SO_NODE_INTERNAL_CONSTRUCTOR(SoVertexAttributeBinding);

  SO_NODE_ADD_FIELD(value, (OVERALL));

  SO_NODE_DEFINE_ENUM_VALUE(Binding, OVERALL);
//SO_NODE_DEFINE_ENUM_VALUE(Binding, PER_FACE);
//SO_NODE_DEFINE_ENUM_VALUE(Binding, PER_FACE_INDEXED);
  SO_NODE_DEFINE_ENUM_VALUE(Binding, PER_VERTEX);
  SO_NODE_DEFINE_ENUM_VALUE(Binding, PER_VERTEX_INDEXED);
  SO_NODE_DEFINE_ENUM_VALUE(Binding, DEFAULT);

  SO_NODE_SET_SF_ENUM_TYPE(value, Binding);
}


/*!
  Destructor.
*/
SoVertexAttributeBinding::~SoVertexAttributeBinding()
{
}

// Doc from superclass.
void
SoVertexAttributeBinding::initClass(void)
{
  SO_NODE_INTERNAL_INIT_CLASS(SoVertexAttributeBinding, SO_FROM_INVENTOR_1|SoNode::VRML1);

  SO_ENABLE(SoGLRenderAction, SoVertexAttributeBindingElement);
  SO_ENABLE(SoPickAction, SoVertexAttributeBindingElement);
  SO_ENABLE(SoCallbackAction, SoVertexAttributeBindingElement);
  SO_ENABLE(SoGetPrimitiveCountAction, SoVertexAttributeBindingElement);
}

// Doc from superclass.
void
SoVertexAttributeBinding::GLRender(SoGLRenderAction * action)
{
  SoVertexAttributeBinding::doAction(action);
}

// Doc from superclass.
void
SoVertexAttributeBinding::doAction(SoAction * action)
{
  if (!this->value.isIgnored()) {
    SoVertexAttributeBindingElement::set(action->getState(),
                                         (SoVertexAttributeBindingElement::Binding)
                                         this->value.getValue());
  }
}

// Doc from superclass.
void
SoVertexAttributeBinding::callback(SoCallbackAction * action)
{
  SoVertexAttributeBinding::doAction((SoAction *)action);
}

// Doc from superclass.
void
SoVertexAttributeBinding::pick(SoPickAction * action)
{
  SoVertexAttributeBinding::doAction(action);
}

// Doc from superclass.
void
SoVertexAttributeBinding::getPrimitiveCount(SoGetPrimitiveCountAction * action)
{
  SoVertexAttributeBinding::doAction(action);
}