okay I have a trick: I have to render my preprocessed texture in my main scene with a dummy geometry I attached to in order texture changes to be display in the second debug view ... Do you see a less dirty way to do this?...
mp3butcher wrote: > Hello all, > I try to rexplain my problem(cf > http://forum.openscenegraph.org/viewtopic.php?t=5016) > > I 'm trying to use the RTT to build an algorithm of fast iterative method > it's a 2 render step: > 1)build the 2ndpass input texture combining datas from several inputs > textures to one with a fragment shader. > 1)loop a shader on the input texture (ping pong textures) untill a no more > pixel are drawn(occlusion query). > > For this I made a FMMquerygeometry that performs the occlusion query and the > loop throught Geometry::drawimplementation: > FMMquerygeometry : public geometry{ > > Code: > > drawimplementation(){ > while(nottheend){ > beginocclusionquery > Geometry::drawimplementation() > endquery() > } > } > > > > > And I build 2 prerender cameras performing the 2 render pass via FBO. > > > For debug purpose I use a compositeviewer one view displays: > Scene---prerenderCamera1stpass > |---prerenderCamera2ndpass > |-Main object using the output texture > the other view displays the debug result of the rtt 2nd pass (using a > textured quad and ortho projection) > > My problem is that the texture displayed in the debug view are always the > same as if nothing have been done ( the original allocated osg::Image > attached to 2ndpass outputtexture) > Thank by advance > > To force this update I 've attached to OutputTexture->getImage() to the > colorbuffer of my 2ndpass camera.... > But the problem is now that: > 1)It make a GPU->CPU copy for nothing > 2)When I change Inputs Textures along the time (by changing attached image > and call dirty) the debug view results doesn't change ....but If I try > attaching the 1st prerender camera to the outputtexture's image the debug > view show me evolutions of the 1st pass over the time... > > Then how can i have the debug view working when it is based on an other scene > prerendering? ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=24533#24533 _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
