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From: skunkwerk <sku...@gm...> - 2008-05-07 15:48:17
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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...> 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...> > 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...> 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... > > 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 lis...@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... > > https://lists.sourceforge.net/lists/listinfo/meshlab-devel > > > > > |
