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/**************************************************************************\
*
* This file is part of the Coin 3D visualization library.
* Copyright (C) by Kongsberg Oil & Gas Technologies.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* ("GPL") version 2 as published by the Free Software Foundation.
* See the file LICENSE.GPL at the root directory of this source
* distribution for additional information about the GNU GPL.
*
* For using Coin with software that can not be combined with the GNU
* GPL, and for taking advantage of the additional benefits of our
* support services, please contact Kongsberg Oil & Gas Technologies
* about acquiring a Coin Professional Edition License.
*
* See http://www.coin3d.org/ for more information.
*
* Kongsberg Oil & Gas Technologies, Bygdoy Alle 5, 0257 Oslo, NORWAY.
* http://www.sim.no/ sales@sim.no coin-support@coin3d.org
*
\**************************************************************************/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif // HAVE_CONFIG_H
#ifdef HAVE_VRML97
/*!
\class SoVRMLNormal SoVRMLNormal.h Inventor/VRMLnodes/SoVRMLNormal.h
\brief The SoVRMLNormal class is used to bind normals to geometry.
\ingroup VRMLnodes
\WEB3DCOPYRIGHT
\verbatim
Normal {
exposedField MFVec3f vector [] # (-,)
}
\endverbatim
This node defines a set of 3D surface normal vectors to be used in
the vector field of some geometry nodes (e.g., SoVRMLIndexedFaceSet
and SoVRMLElevationGrid). This node contains one multiple-valued
field that contains the normal vectors. Normals shall be of unit
length.
*/
/*!
\var SoMFVec3f SoVRMLNormal::vector
The normal vectors. Empty by default.
*/
#include <Inventor/VRMLnodes/SoVRMLNormal.h>
#include <Inventor/VRMLnodes/SoVRMLMacros.h>
#include <Inventor/actions/SoGLRenderAction.h>
#include <Inventor/elements/SoNormalElement.h>
#include <Inventor/elements/SoGLVBOElement.h>
#include "nodes/SoSubNodeP.h"
#include "misc/SoVBO.h"
SO_NODE_SOURCE(SoVRMLNormal);
class SoVRMLNormalP {
public:
SoVRMLNormalP() : vbo(NULL) { }
~SoVRMLNormalP() { delete this->vbo; }
SoVBO * vbo;
};
#define PRIVATE(obj) obj->pimpl
// Doc in parent
void
SoVRMLNormal::initClass(void)
{
SO_NODE_INTERNAL_INIT_CLASS(SoVRMLNormal, SO_VRML97_NODE_TYPE);
}
/*!
Constructor.
*/
SoVRMLNormal::SoVRMLNormal(void)
{
PRIVATE(this) = new SoVRMLNormalP;
SO_VRMLNODE_INTERNAL_CONSTRUCTOR(SoVRMLNormal);
SO_VRMLNODE_ADD_EMPTY_EXPOSED_MFIELD(vector);
}
/*!
Destructor.
*/
SoVRMLNormal::~SoVRMLNormal()
{
delete PRIVATE(this);
}
// Doc in parent
void
SoVRMLNormal::doAction(SoAction * action)
{
SoNormalElement::set(action->getState(), this,
this->vector.getNum(), this->vector.getValues(0));
}
// Doc in parent
void
SoVRMLNormal::GLRender(SoGLRenderAction * action)
{
//
// FIXME: code to test if all normals are unit length, and store
// this in some cached variable. should be passed on to
// SoGLNormalizeElement to optimize rendering (pederb)
//
SoVRMLNormal::doAction((SoAction*) action);
SoState * state = action->getState();
SoBase::staticDataLock();
SbBool setvbo = FALSE;
const int num = this->vector.getNum();
if (SoGLVBOElement::shouldCreateVBO(state, num)) {
setvbo = TRUE;
SbBool dirty = FALSE;
if (PRIVATE(this)->vbo == NULL) {
PRIVATE(this)->vbo = new SoVBO(GL_ARRAY_BUFFER, GL_STATIC_DRAW);
dirty = TRUE;
}
else if (PRIVATE(this)->vbo->getBufferDataId() != this->getNodeId()) {
dirty = TRUE;
}
if (dirty) {
PRIVATE(this)->vbo->setBufferData(this->vector.getValues(0),
num*sizeof(SbVec3f),
this->getNodeId());
}
}
else if (PRIVATE(this)->vbo && PRIVATE(this)->vbo->getBufferDataId()) {
// clear buffers to deallocate VBO memory
PRIVATE(this)->vbo->setBufferData(NULL, 0, 0);
}
SoBase::staticDataUnlock();
if (setvbo) {
SoGLVBOElement::setNormalVBO(state, PRIVATE(this)->vbo);
}
}
// Doc in parent
void
SoVRMLNormal::callback(SoCallbackAction * action)
{
SoVRMLNormal::doAction((SoAction*) action);
}
// Doc in parent
void
SoVRMLNormal::pick(SoPickAction * action)
{
SoVRMLNormal::doAction((SoAction*) action);
}
// Doc in parent
void
SoVRMLNormal::getPrimitiveCount(SoGetPrimitiveCountAction * action)
{
SoVRMLNormal::doAction((SoAction*) action);
}
#undef PRIVATE
#endif // HAVE_VRML97
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