In case you require the modified source file I have it attached it here. The
problem is when a single child node of a switch has a transformation applied to
it. By removing the child and adding it under a MatrixTransform node causes the
ValueList to be cleared and when the addChild occurs for the MatrixTransform
with the original node added as its child the lists are set to their default
value of true.
The fix just replaces the original child node with the MatrixTransform node.
------------------------
Tony V
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=66021#66021
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
*
* This library is open source and may be redistributed and/or modified under
* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
* (at your option) any later version. The full license is in LICENSE file
* included with this distribution, and on the openscenegraph.org website.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* OpenSceneGraph Public License for more details.
*/
//
// OpenFlight® loader for OpenSceneGraph
//
// Copyright (C) 2005-2007 Brede Johansen
//
#include <stdexcept>
#include <osg/Texture2D>
#include <osg/MatrixTransform>
#include "Record.h"
#include "Document.h"
using namespace flt;
Record::Record()
{
}
Record::~Record()
{
}
void Record::read(RecordInputStream& in, Document& document)
{
_parent = document.getCurrentPrimaryRecord();
// Read record body.
readRecord(in,document);
}
void Record::readRecord(RecordInputStream& /*in*/, Document& /*document*/)
{
}
PrimaryRecord::PrimaryRecord() :
_numberOfReplications(0)
{
}
void PrimaryRecord::read(RecordInputStream& in, Document& document)
{
PrimaryRecord* parentPrimary = document.getTopOfLevelStack();
PrimaryRecord* currentPrimary = document.getCurrentPrimaryRecord();
// Finally call dispose() for primary without push, pop level pair.
if (currentPrimary && currentPrimary!=parentPrimary)
{
currentPrimary->dispose(document);
}
// Update current primary record.
document.setCurrentPrimaryRecord(this);
_parent = parentPrimary;
// Read record body.
readRecord(in,document);
}
///////////////////////////////////////////////////////////////////////////////////
// Helper methods
// Insert matrix-tranform(s)
//
// node: node to apply transform
// matrix: transformation matrix
// numberOfReplications: zero for regular transform, number of copies if
replication is used.
void flt::insertMatrixTransform(osg::Node& node, const osg::Matrix& matrix, int
numberOfReplications)
{
osg::ref_ptr<osg::Node> ref = &node;
osg::Node::ParentList parents = node.getParents();
// Start without transformation if replication.
osg::Matrix accumulatedMatrix = (numberOfReplications > 0)?
osg::Matrix::identity() : matrix;
for (int n=0; n<=numberOfReplications; n++)
{
// Accumulate transformation for each replication.
osg::ref_ptr<osg::MatrixTransform> transform = new
osg::MatrixTransform(accumulatedMatrix);
transform->setDataVariance(osg::Object::STATIC);
// Add transform to parents
for (osg::Node::ParentList::iterator itr=parents.begin();
itr!=parents.end();
++itr)
{
(*itr)->replaceChild(&node, transform.get());
}
// Make primary a child of matrix transform.
transform->addChild(&node);
// Accumulate transform if multiple replications.
accumulatedMatrix *= matrix;
}
}
///////////////////////////////////////////////////////////////////////////////////
osg::Vec3Array* flt::getOrCreateVertexArray(osg::Geometry& geometry)
{
osg::Vec3Array* vertices =
dynamic_cast<osg::Vec3Array*>(geometry.getVertexArray());
if (!vertices)
{
vertices = new osg::Vec3Array;
geometry.setVertexArray(vertices);
}
return vertices;
}
osg::Vec3Array* flt::getOrCreateNormalArray(osg::Geometry& geometry)
{
osg::Vec3Array* normals =
dynamic_cast<osg::Vec3Array*>(geometry.getNormalArray());
if (!normals)
{
normals = new osg::Vec3Array;
geometry.setNormalArray(normals);
}
return normals;
}
osg::Vec4Array* flt::getOrCreateColorArray(osg::Geometry& geometry)
{
osg::Vec4Array* colors =
dynamic_cast<osg::Vec4Array*>(geometry.getColorArray());
if (!colors)
{
colors = new osg::Vec4Array;
geometry.setColorArray(colors);
}
return colors;
}
osg::Vec2Array* flt::getOrCreateTextureArray(osg::Geometry& geometry, int unit)
{
osg::Vec2Array* UVs =
dynamic_cast<osg::Vec2Array*>(geometry.getTexCoordArray(unit));
if (!UVs)
{
UVs = new osg::Vec2Array;
geometry.setTexCoordArray(unit,UVs);
}
return UVs;
}
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