Hi, Almir
there are visitor that find drawable by name for you
class GetDrawableByNameVisitor:public osg::NodeVisitor
{
public:
GetDrawableByNameVisitor(const std::string
&name):osg::NodeVisitor(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN): m_name(name),
result(0)
{
setNodeMaskOverride(0xffffffff);
setTraversalMask(0xffffffff);
}
using osg::NodeVisitor::apply;
void apply(osg::Geode& geode)
{
for (int i = 0; i< geode.getNumDrawables(); i++)
{
osg::Drawable* dr = geode.getDrawable(i);
if (dr->getName()==m_name)
result = dr;
}
}
osg::Drawable* getResult(){return result;}
private:
std::string m_name;
osg::Drawable* result;
};
so in your example you need something like
GetDrawableByNameVisitor gdbnv("name of your material in 3dsmax with texture
you wanna change")
arTransformA->accept(gdbny);
if (gdbny.getResult())
{
osg::ImageStream* is = ...;//load your movie or whatever you got
osg::Texture2D* animatedTexture = new osg::Texture2D(is);
gdbny.getResult()->getOrCreateStateSet()->setTextureAttribute(0,animatedTexture,osg::StateAttribute::ON);
}
there can be case when your texture is not on 0 texture unit so you may need to
go through like first 8 texture units with stateset
getTextureAttribute(tex_unit_number, osg::StateAttribute::TEXTURE) and check
which one texture unit have texture, then set your new texture created with
imagestream to that texture unit with setTextureAttribute on stateset.
Cheers,
Sergey.
16.02.2011, 05:15, "Almir Brazil" <[email protected]>:
> hybr wrote:
>
>> Hi, Almir
>>
>> Try following thing:
>> Look at material name which uses this texture in 3ds max, in osg this will
>> be the name of drawable with stateset that uses this texture. You can find
>> this drawable with some visitor, get stateset there, then set your animated
>> texture to texture unit where old texture is (if there are one texture in
>> material it's 0 by default).
>>
>> Cheers,
>> Sergey.
>>
>> 15.02.2011, 04:24, "Almir Brazil" <>:
>>> Hi,
>>>
>>> I'm new to OpenSceneGraph, and I have the following scenario:
>>>
>>> A OSG file exported from 3DS Max, using OSGExp0.9.8....
>>> That file has 3 textures... 2 should be static, and 1 should be animated.
>>> When playing the exported OSG file, all 3 textures still static.
>>>
>>> I read few things about osg imagesequence, that can read a lot of
>>> sequential images to produce a animated texture effect. And that's what I'm
>>> looking for!!
>>>
>>> My dificultie is to change (in code) the static texture exported from
>>> 3DSMax to a imagesequence texture.
>>>
>>> Can anyone say me how to do that?
>>>
>>> ...
>>>
>>> Thank you!
>>>
>>> Cheers,
>>> Almir
>>>
>>> ------------------
>>> Read this topic online here:
>>> http://forum.openscenegraph.org/viewtopic.php?p=36665#36665
>>>
>>> _______________________________________________
>>> osg-users mailing list
>>>
>>> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
>> _______________________________________________
>> osg-users mailing list
>>
>> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
>>
>> ------------------
>> Post generated by Mail2Forum
>
> Ok, here is the code... It's a modified version of osgartsimple.cpp:
>
> (see attachment)
>
> The OSG file - karsten.osg - (generated with 3ds Max) has 3 main textures. I
> want to change one of them with a imagesequence or movie file (quicktime .mov)
> (I have both of them).
>
> I haven't a Geode object, only a VideoGeode... how can I create a stateset to
> change the texture?
>
> Thanks!
>
> ------------------
> Read this topic online here:
> http://forum.openscenegraph.org/viewtopic.php?p=36711#36711
>
> /* -*-c++-*-
> *
> * osgART - ARToolKit for OpenSceneGraph
> * Copyright (C) 2005-2008 Human Interface Technology Laboratory New Zealand
> *
> * This file is part of osgART 2.0
> *
> * osgART 2.0 is free software: you can redistribute it and/or modify
> * it under the terms of the GNU General Public License as published by
> * the Free Software Foundation, either version 3 of the License, or
> * (at your option) any later version.
> *
> * osgART 2.0 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
> * GNU General Public License for more details.
> *
> * You should have received a copy of the GNU General Public License
> * along with osgART 2.0. If not, see <http://www.gnu.org/licenses/>.
> *
> */
>
> #include <osgART/Foundation>
> #include <osgART/VideoLayer>
> #include <osgART/PluginManager>
> #include <osgART/VideoGeode>
> #include <osgART/Utils>
> #include <osgART/GeometryUtils>
> #include <osgART/MarkerCallback>
> #include <osgART/TransformFilterCallback>
>
> #include <osgViewer/Viewer>
> #include <osgViewer/ViewerEventHandlers>
>
> #include <osgDB/FileUtils>
>
> #include <osgDB/WriteFile>
> #include <osgDB/ReadFile>
> #include <osgDB/FileNameUtils>
> #include <osgDB/Registry>
>
> osg::Group* createImageBackground(osg::Image* video) {
> osgART::VideoLayer* _layer = new osgART::VideoLayer();
> _layer->setSize(*video);
> osgART::VideoGeode* _geode = new
> osgART::VideoGeode(osgART::VideoGeode::USE_TEXTURE_2D, video);
> addTexturedQuad(*_geode,video->s(),video->t());
> _layer->addChild(_geode);
> return _layer;
> }
>
> int main(int argc, char* argv[]) {
>
> // create a root node
> osg::ref_ptr<osg::Group> root = new osg::Group;
>
> osgViewer::Viewer viewer;
>
> // attach root node to the viewer
> viewer.setSceneData(root.get());
>
> // add relevant handlers to the viewer
> viewer.addEventHandler(new osgViewer::StatsHandler);
> viewer.addEventHandler(new osgViewer::WindowSizeHandler);
> viewer.addEventHandler(new osgViewer::ThreadingHandler);
> viewer.addEventHandler(new osgViewer::HelpHandler);
>
> // preload the video and tracker
> int _video_id =
> osgART::PluginManager::instance()->load("osgart_video_artoolkit2");
> int _tracker_id =
> osgART::PluginManager::instance()->load("osgart_tracker_artoolkit2");
>
> // Load a video plugin.
> osg::ref_ptr<osgART::Video> video =
> dynamic_cast<osgART::Video*>(osgART::PluginManager::instance()->get(_video_id));
>
> // check if an instance of the video stream could be started
> if (!video.valid())
> {
> // Without video an AR application can not work. Quit if none
> found.
> osg::notify(osg::FATAL) << "Could not initialize video
> plugin!" << std::endl;
> exit(-1);
> }
>
> // Open the video. This will not yet start the video stream but will
> // get information about the format of the video which is essential
> // for the connected tracker
> video->open();
>
> osg::ref_ptr<osgART::Tracker> tracker =
> dynamic_cast<osgART::Tracker*>(osgART::PluginManager::instance()->get(_tracker_id));
>
> if (!tracker.valid())
> {
> // Without tracker an AR application can not work. Quit if
> none found.
> osg::notify(osg::FATAL) << "Could not initialize tracker
> plugin!" << std::endl;
> exit(-1);
> }
>
> // get the tracker calibration object
> osg::ref_ptr<osgART::Calibration> calibration =
> tracker->getOrCreateCalibration();
>
> // load a calibration file
> if (!calibration->load(std::string("data/camera_para.dat")))
> {
>
> // the calibration file was non-existing or couldnt be loaded
> osg::notify(osg::FATAL) << "Non existing or incompatible
> calibration file" << std::endl;
> exit(-1);
> }
>
> // set the image source for the tracker
> tracker->setImage(video.get());
>
> osgART::TrackerCallback::addOrSet(root.get(), tracker.get());
>
> osg::ref_ptr<osgART::Marker> markerA =
> tracker->addMarker("single;karsten_a.patt;70;0;0");
>
> if (!markerA.valid())
> {
> // Without marker an AR application can not work. Quit if
> none found.
> osg::notify(osg::FATAL) << "Could not add marker!" <<
> std::endl;
> exit(-1);
> }
>
> markerA->setActive(true);
>
> osg::ref_ptr<osg::MatrixTransform> arTransformA = new
> osg::MatrixTransform();
> osgART::attachDefaultEventCallbacks(arTransformA.get(),
> markerA.get());
> arTransformA->addChild(osgDB::readNodeFile("karsten.osg"));
> arTransformA->getOrCreateStateSet()->setRenderBinDetails(100,
> "RenderBin");
>
> osg::ref_ptr<osg::Group> videoBackground =
> createImageBackground(video.get());
> videoBackground->getOrCreateStateSet()->setRenderBinDetails(0,
> "RenderBin");
>
> osg::ref_ptr<osg::Camera> cam = calibration->createCamera();
>
> cam->addChild(arTransformA.get());
>
> cam->addChild(videoBackground.get());
>
> root->addChild(cam.get());
>
> video->start();
> return viewer.run();
> }
>
> _______________________________________________
> osg-users mailing list
> [email protected]
> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
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