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From: Paolo C. <pao...@is...> - 2008-05-07 22:45:20
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Translated. sorry for the italian comments that are surviving in a lot of places... skunkwerk wrote: > i'm using a CMesh0::FaceIterator but it seems like it's a const for > some reason - when I try to change values of the face, like > fit->cWT(0).N() i get compilation errors about 'assignment of > read-only location.' what's the proper way to modify these values? > > i was translating some of the italian comments in rect_packer.cpp but > couldn't find translations for the following: > posiziono - position? > pe plus' > could someone please translate these to english for me? > > thanks > imran > > On Tue, Apr 29, 2008 at 11:48 PM, skunkwerk <sku...@gm... > <mailto:sku...@gm...>> wrote: > > thanks Paolo, > i guess CMesh0 is how i'll get the faceiterator - i'm working > on some collada importer optimizations right now but might get > back to this in a few days. what options do we have for a > numerical solver? > > imran > > > On Tue, Apr 29, 2008 at 2:22 PM, Paolo Cignoni > <pao...@is... <mailto:pao...@is...>> wrote: > > I like your proposal, but I strongly suggest you to proceed > gradually and start and complete and test a functionality at a > time. > > First of all start to just add a simple rectangular packer, > > - then try to use the rect_packer provided code > > - then try to look at the code in the > trimesh/textcoord_optimization.h file. > > Before facing LSCM we should solve the issue of what numerical > solver use for it and for other issues that we have around in > the vcg. > I hope we could take some decision in the next weeks about the > numeric solver in the vcg. > > I noticed that some notes on the basic types were missing so i > added it in > http://meshlab.sourceforge.net/wiki/index.php/Writing_a_Plugin > Feel also free to contribute to the wiki in the part about the > writing of the plugins when you see points needing some > clarification or a deeper discussion. > > > cheers > p. > > > > > > > > skunkwerk wrote: >> thanks for the hints paolo, >> i wanted to use this algorithm: >> http://alice.loria.fr/php/article.php?pub=../publications/papers/2002/lscm >> but it seemed like it needed information on the actual >> models, and was taking in arbitrarily-shaped textures. >> >> the only other algorithm i've found for texture packing is a >> recursive tree-based one: >> http://www.blackpawn.com/texts/lightmaps/default.html >> >> i tried this line (along with everything else i could think of): >> MeshModel::FaceIterator fit; >> but it didn't like the 'MeshModel' part - is 'mm' not an >> object of type MeshModel? >> >> if someone could suggest the correct syntax i can get started >> on testing the texture atlas >> >> thanks, >> imran >> >> On Tue, Apr 29, 2008 at 2:13 AM, Paolo Cignoni >> <pao...@is... >> <mailto:pao...@is...>> wrote: >> >> skunkwerk wrote: >> > i've attached a texture atlas function. >> > >> > it compiles except for a ConstFaceIterator error - I've >> tried using >> > the template<typename MESHTYPE> but that didn't work >> either. the >> > algorithm is VERY basic (textures are added one after >> another in a >> > row), but should work. i couldn't find any algorithms >> for more >> > closely-packed positioning, but i could look at the code in >> > openscenegraph's texture atlas generator. >> Nice Job! >> >> The right place for this stuff is the filter_texture >> plugin that i have >> just added, >> Now it is just a placeholder filter you should add your >> code there. >> >> Important: >> In the plugin dir you can find a rect_packer that should >> make good job. >> please use it to build a good packing of the texture size >> >> > questions: >> > 1) if someone could tell me how to iterate through >> faces from a >> > function outside vcg, that'd be great so i could test >> this out >> We have started to improve the developer documentation: >> two new pages in >> the wiki should help you >> >> http://meshlab.sourceforge.net/wiki/index.php/Accessing_the_mesh >> http://meshlab.sourceforge.net/wiki/index.php/Algorithms >> >> > 2) paolo, what's the best location of this function? >> i'm currently >> > putting it in mainwindow_Runtime.cpp to test it out >> The right location is inside the filter_texture plugin >> possible parameter of the plugin: >> - format of the saved texture (as a enum) >> - max size of the texture >> >> > 3) how do I access the data from already-loaded >> textures? so i can >> > prevent having to load all the textures again... >> Do not worry about that. Feel free to use QT to load >> again the images >> and process them, it should not create a significant >> overhead. >> >> Once your processing is ended (and you have saved the new >> texture) you >> should update the texture names stored inside the mesh >> sending a signal >> to the updateTexture() slot of the mainwindow (the >> parent of the action) >> >> cheers >> p. >> >> -- >> Paolo Cignoni -- Senior Researcher >> Visual Computing Laboratory - ISTI - CNR >> http://vcg.isti.cnr.it/~cignoni >> <http://vcg.isti.cnr.it/%7Ecignoni> >> >> ISTI - CNR >> Via Moruzzi 1, >> 56124 Pisa >> ITALY >> >> >> ------------------------------------------------------------------------- >> This SF.net email is sponsored by the 2008 JavaOne(SM) >> Conference >> Don't miss this year's exciting event. There's still time >> to save $100. >> Use priority code J8TL2D2. >> http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone >> _______________________________________________ >> Meshlab-devel mailing list >> Mes...@li... >> <mailto:Mes...@li...> >> https://lists.sourceforge.net/lists/listinfo/meshlab-devel >> >> >> ------------------------------------------------------------------------ >> ------------------------------------------------------------------------- >> This SF.net email is sponsored by the 2008 JavaOne(SM) >> Conference Don't miss this year's exciting event. There's >> still time to save $100. Use priority code J8TL2D2. >> http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone >> >> ------------------------------------------------------------------------ >> >> _______________________________________________ >> Meshlab-devel mailing list >> Mes...@li... <mailto:Mes...@li...> >> https://lists.sourceforge.net/lists/listinfo/meshlab-devel >> > > > -- > Paolo Cignoni -- Senior Researcher > Visual Computing Laboratory - ISTI - CNR > http://vcg.isti.cnr.it/~cignoni > <http://vcg.isti.cnr.it/%7Ecignoni> ISTI - CNR Via Moruzzi 1, > 56124 Pisa ITALY > > > ------------------------------------------------------------------------- > This SF.net email is sponsored by the 2008 JavaOne(SM) Conference > Don't miss this year's exciting event. There's still time to > save $100. > Use priority code J8TL2D2. > http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone > _______________________________________________ > Meshlab-devel mailing list > Mes...@li... > <mailto:Mes...@li...> > https://lists.sourceforge.net/lists/listinfo/meshlab-devel > > > > ------------------------------------------------------------------------ > > ------------------------------------------------------------------------- > This SF.net email is sponsored by the 2008 JavaOne(SM) Conference > Don't miss this year's exciting event. There's still time to save $100. > Use priority code J8TL2D2. > http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone > > ------------------------------------------------------------------------ > > _______________________________________________ > Meshlab-devel mailing list > Mes...@li... > https://lists.sourceforge.net/lists/listinfo/meshlab-devel > -- Paolo Cignoni -- Senior Researcher Visual Computing Laboratory - ISTI - CNR http://vcg.isti.cnr.it/~cignoni ISTI - CNR Via Moruzzi 1, 56124 Pisa ITALY |
