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From: skunkwerk <sku...@gm...> - 2008-07-23 04:06:20
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my test box has negative uv coords, and even though i try to correct for them i end up with uv coords outside the 0-1 range. could someone confirm the following negative to positive u/v coordinate equivalencies? thanks correcting negative: -1.89619 to 1.10381 correcting negative: -0.211469 to 0.788531 correcting negative: -0.211469 to 0.788531 correcting negative: -0.211469 to 0.788531 correcting negative: -1.89619 to 1.10381 correcting negative: -1.89619 to 1.10381 correcting negative: -1.89619 to 1.10381 correcting negative: -0.211469 to 0.788531 correcting negative: -1.89619 to 1.10381 correcting negative: -0.211469 to 0.788531 correcting negative: -1.89619 to 1.10381 correcting negative: -0.211469 to 0.788531 correcting negative: -0.379878 to 0.620122 correcting negative: -2.48578 to 2.51422 correcting negative: -2.48578 to 2.51422 correcting negative: -2.48578 to 2.51422 correcting negative: -0.379878 to 0.620122 correcting negative: -0.379878 to 0.620122 On Tue, Jul 22, 2008 at 8:11 PM, skunkwerk <sku...@gm...> wrote: > i made two more fixes to make the filter work, one of which was the order > in which the textures were drawn into the atlas: i was starting at 0,0 at > the top-left, whereas i believe meshlab wants 0,0 at the bottom-left. > > it works fine with this modified file: www.akbars.net/TextureDoublex2.ply > > but still not on my box... > > imran > > > On Tue, Jul 22, 2008 at 6:06 PM, skunkwerk <sku...@gm...> wrote: > >> i've committed a fix that should now make the texturedouble.ply generate >> correct UV coords... >> however models with more complex texturing still don't work properly... >> >> any suggestions on how to debug this? i think i'll take the same >> texturedouble.ply and try doubling the original uv coords to see how it >> handles that... >> >> imran >> >> >> On Tue, Jul 22, 2008 at 4:49 PM, skunkwerk <sku...@gm...> wrote: >> >>> paolo, >>> you're correct, the assert was happening on a null image, even though >>> i've put in a check to not do anything on null images... but i don't think >>> any changes are necessary. >>> >>> i'll test out the texturedouble.ply and report back my findings >>> >>> i have been testing out this model (a simple cube with a different >>> texture on every face):www.akbars.net/boxAtlasbig.zip >>> >>> the texture atlas is generated fine, but the resulting model does not >>> look right. i looked through the debug output, and as far as i can see, >>> each material's uvs are offset to the correct part of the texture atlas (i >>> did this by comparing the material number of that face and its uvs to the >>> position of that material in the atlas. the second division is the final uv >>> that's saved): >>> ------------------ >>> >>> material 0 position: 805 , 1073 >>> >>> U: 1.10381 V: 1.98863 >>> >>> new (first division) U: 0.839221 new V: 0.740719 >>> >>> new (second division) U: 0.955932 new V: 0.769647 >>> >>> ------------------ >>> >>> material 0 position: 805 , 1073 >>> >>> U: 0.788531 V: 0.303902 >>> >>> new (first division) U: 0.599517 new V: 0.113197 >>> >>> new (second division) U: 0.897179 new V: 0.593546 >>> >>> ------------------ >>> >>> material 0 position: 805 , 1073 >>> >>> U: 0.788531 V: 1.98863 >>> >>> new (first division) U: 0.599517 new V: 0.740719 >>> >>> new (second division) U: 0.897179 new V: 0.769647 >>> >>> ------------------ >>> >>> material 0 position: 805 , 1073 >>> >>> U: 0.788531 V: 0.303902 >>> >>> new (first division) U: 0.599517 new V: 0.113197 >>> >>> new (second division) U: 0.897179 new V: 0.593546 >>> >>> ------------------ >>> >>> material 0 position: 805 , 1073 >>> >>> U: 1.10381 V: 1.98863 >>> >>> new (first division) U: 0.839221 new V: 0.740719 >>> >>> new (second division) U: 0.955932 new V: 0.769647 >>> >>> ------------------ >>> >>> material 0 position: 805 , 1073 >>> >>> U: 1.10381 V: 0.303902 >>> >>> new (first division) U: 0.839221 new V: 0.113197 >>> >>> new (second division) U: 0.955932 new V: 0.593546 >>> >>> ------------------ >>> >>> material 3 position: 0 , 1073 >>> >>> U: 1.98863 V: 0 >>> >>> new (first division) U: 0.740719 new V: 0 >>> >>> new (second division) U: 0.555712 new V: 0.56178 >>> >>> ------------------ >>> >>> material 3 position: 0 , 1073 >>> >>> U: 0.303902 V: 1.00833 >>> >>> new (first division) U: 0.113197 new V: 0.502075 >>> >>> new (second division) U: 0.084924 new V: 0.720026 >>> >>> ------------------ >>> >>> material 3 position: 0 , 1073 >>> >>> U: 0.303902 V: 0 >>> >>> new (first division) U: 0.113197 new V: 0 >>> >>> new (second division) U: 0.084924 new V: 0.56178 >>> >>> ------------------ >>> >>> material 3 position: 0 , 1073 >>> >>> U: 0.303902 V: 1.00833 >>> >>> new (first division) U: 0.113197 new V: 0.502075 >>> >>> new (second division) U: 0.084924 new V: 0.720026 >>> >>> ------------------ >>> >>> material 3 position: 0 , 1073 >>> >>> U: 1.98863 V: 0 >>> >>> new (first division) U: 0.740719 new V: 0 >>> >>> new (second division) U: 0.555712 new V: 0.56178 >>> >>> ------------------ >>> >>> material 3 position: 0 , 1073 >>> >>> U: 1.98863 V: 1.00833 >>> >>> new (first division) U: 0.740719 new V: 0.502075 >>> >>> new (second division) U: 0.555712 new V: 0.720026 >>> >>> ------------------ >>> >>> material 2 position: 805 , 1609 >>> >>> U: 1.10381 V: 0 >>> >>> new (first division) U: 0.839221 new V: 0 >>> >>> new (second division) U: 0.905876 new V: 0.842408 >>> >>> ------------------ >>> >>> material 2 position: 805 , 1609 >>> >>> U: 0.788531 V: 1.00833 >>> >>> new (first division) U: 0.599517 new V: 0.502075 >>> >>> new (second division) U: 0.86142 new V: 0.921531 >>> >>> ------------------ >>> >>> material 2 position: 805 , 1609 >>> >>> U: 1.10381 V: 1.00833 >>> >>> new (first division) U: 0.839221 new V: 0.502075 >>> >>> new (second division) U: 0.905876 new V: 0.921531 >>> >>> ------------------ >>> >>> material 2 position: 805 , 1609 >>> >>> U: 0.788531 V: 1.00833 >>> >>> new (first division) U: 0.599517 new V: 0.502075 >>> >>> new (second division) U: 0.86142 new V: 0.921531 >>> >>> ------------------ >>> >>> material 2 position: 805 , 1609 >>> >>> U: 1.10381 V: 0 >>> >>> new (first division) U: 0.839221 new V: 0 >>> >>> new (second division) U: 0.905876 new V: 0.842408 >>> >>> ------------------ >>> >>> material 2 position: 805 , 1609 >>> >>> U: 0.788531 V: 0 >>> >>> new (first division) U: 0.599517 new V: 0 >>> >>> new (second division) U: 0.86142 new V: 0.842408 >>> >>> ------------------ >>> >>> material 5 position: 310 , 1675 >>> >>> U: 0.620122 V: 0 >>> >>> new (first division) U: 0.214271 new V: 0 >>> >>> new (second division) U: 0.346621 new V: 0.876963 >>> >>> ------------------ >>> >>> material 5 position: 310 , 1675 >>> >>> U: 2.51422 V: 1.26042 >>> >>> new (first division) U: 0.86874 new V: 0.557604 >>> >>> new (second division) U: 0.522895 new V: 0.942942 >>> >>> ------------------ >>> >>> material 5 position: 310 , 1675 >>> >>> U: 2.51422 V: 0 >>> >>> new (first division) U: 0.86874 new V: 0 >>> >>> new (second division) U: 0.522895 new V: 0.876963 >>> >>> ------------------ >>> >>> material 5 position: 310 , 1675 >>> >>> U: 2.51422 V: 1.26042 >>> >>> new (first division) U: 0.86874 new V: 0.557604 >>> >>> new (second division) U: 0.522895 new V: 0.942942 >>> >>> ------------------ >>> >>> material 5 position: 310 , 1675 >>> >>> U: 0.620122 V: 0 >>> >>> new (first division) U: 0.214271 new V: 0 >>> >>> new (second division) U: 0.346621 new V: 0.876963 >>> >>> ------------------ >>> >>> material 5 position: 310 , 1675 >>> >>> U: 0.620122 V: 1.26042 >>> >>> new (first division) U: 0.214271 new V: 0.557604 >>> >>> new (second division) U: 0.346621 new V: 0.942942 >>> >>> ------------------ >>> >>> material 4 position: 0 , 1675 >>> >>> U: 0.264336 V: 0 >>> >>> new (first division) U: 0.0851076 new V: 0 >>> >>> new (second division) U: 0.0245884 new V: 0.876963 >>> >>> ------------------ >>> >>> material 4 position: 0 , 1675 >>> >>> U: 2.37024 V: 1.26042 >>> >>> new (first division) U: 0.76314 new V: 0.557604 >>> >>> new (second division) U: 0.220478 new V: 0.942942 >>> >>> ------------------ >>> >>> material 4 position: 0 , 1675 >>> >>> U: 0.264336 V: 1.26042 >>> >>> new (first division) U: 0.0851076 new V: 0.557604 >>> >>> new (second division) U: 0.0245884 new V: 0.942942 >>> >>> ------------------ >>> >>> material 4 position: 0 , 1675 >>> >>> U: 2.37024 V: 1.26042 >>> >>> new (first division) U: 0.76314 new V: 0.557604 >>> >>> new (second division) U: 0.220478 new V: 0.942942 >>> >>> ------------------ >>> >>> material 4 position: 0 , 1675 >>> >>> U: 0.264336 V: 0 >>> >>> new (first division) U: 0.0851076 new V: 0 >>> >>> new (second division) U: 0.0245884 new V: 0.876963 >>> >>> ------------------ >>> >>> material 4 position: 0 , 1675 >>> >>> U: 2.37024 V: 0 >>> >>> new (first division) U: 0.76314 new V: 0 >>> >>> new (second division) U: 0.220478 new V: 0.876963 >>> >>> ------------------ >>> >>> material 1 position: 0 , 0 >>> >>> U: 1.89619 V: 0.303902 >>> >>> new (first division) U: 0.70629 new V: 0.113197 >>> >>> new (second division) U: 0.70629 new V: 0.0635917 >>> >>> ------------------ >>> >>> material 1 position: 0 , 0 >>> >>> U: 0.211469 V: 1.98863 >>> >>> new (first division) U: 0.0787676 new V: 0.740719 >>> >>> new (second division) U: 0.0787676 new V: 0.416121 >>> >>> ------------------ >>> >>> material 1 position: 0 , 0 >>> >>> U: 0.211469 V: 0.303902 >>> >>> new (first division) U: 0.0787676 new V: 0.113197 >>> >>> new (second division) U: 0.0787676 new V: 0.0635917 >>> >>> ------------------ >>> >>> material 1 position: 0 , 0 >>> >>> U: 0.211469 V: 1.98863 >>> >>> new (first division) U: 0.0787676 new V: 0.740719 >>> >>> new (second division) U: 0.0787676 new V: 0.416121 >>> >>> ------------------ >>> >>> material 1 position: 0 , 0 >>> >>> U: 1.89619 V: 0.303902 >>> >>> new (first division) U: 0.70629 new V: 0.113197 >>> >>> new (second division) U: 0.70629 new V: 0.0635917 >>> >>> ------------------ >>> >>> material 1 position: 0 , 0 >>> >>> U: 1.89619 V: 1.98863 >>> >>> new (first division) U: 0.70629 new V: 0.740719 >>> >>> new (second division) U: 0.70629 new V: 0.416121 >>> >>> global: 1073 , 1910 >>> >>> inserted texture 0 into atlas at position: 805 1073 >>> >>> inserted texture 1 into atlas at position: 0 0 >>> >>> inserted texture 2 into atlas at position: 805 1609 >>> >>> inserted texture 3 into atlas at position: 0 1073 >>> >>> inserted texture 4 into atlas at position: 0 1675 >>> >>> inserted texture 5 into atlas at position: 310 1675 >>> >>> >>> On Tue, Jul 22, 2008 at 4:30 PM, Paolo Cignoni < >>> pao...@is...> wrote: >>> >>>> skunkwerk wrote: >>>> > Hey Sebastian, >>>> > this one worked for me: www.akbars.net/10.zip >>>> > i've been testing with collada models from >>>> > sketchup.google.com/3dwarehousebut that's because my version of the >>>> > collada importer works ok with the >>>> > textures - i don't think the one in subversion has been fixed yet... >>>> > >>>> > try increasing the size of the texture atlas until i can get the >>>> resampled >>>> > tiles working. i'm going to test out the results on a simple box >>>> today >>>> > >>>> > paolo, the rect_packer.cpp has a bunch of asserts in it... i'd like to >>>> > change them to return false, so that the atlas will fail, but not >>>> crash >>>> > whenever some of the images are null, etc. the other way would be to >>>> try to >>>> > do those checks in the filter itself. which would you recommend? >>>> > >>>> > imran >>>> > >>>> > On Tue, Jul 22, 2008 at 3:25 AM, Sebastian Herholz < >>>> > seb...@go...> wrote: >>>> > >>>> > >>>> >>>> I have tried too the atlas builder but it failed to build a correct mesh >>>> (but without crashing :) ) on the very very simple model >>>> texturedouble.ply that you can find among the meshlab sample models. >>>> >>>> This model is composed by just two squares, each one of them textured >>>> with a different texture. >>>> your filter builds a correct atlas texture but it assigns wrong tex >>>> coords to the mesh. >>>> >>>> >>>> About the rect packer what are exactly the asserts that worry you? >>>> From what i could see you they trigger on very trashy situations that >>>> should be cleaned before (zero sized textures and so on). I could have >>>> missed some, so what assert()'s did you refer to? >>>> >>>> cheers >>>> >>>> -- >>>> 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 Moblin Your Move Developer's >>>> challenge >>>> Build the coolest Linux based applications with Moblin SDK & win great >>>> prizes >>>> Grand prize is a trip for two to an Open Source event anywhere in the >>>> world >>>> http://moblin-contest.org/redirect.php?banner_id=100&url=/ >>>> _______________________________________________ >>>> Meshlab-devel mailing list >>>> Mes...@li... >>>> https://lists.sourceforge.net/lists/listinfo/meshlab-devel >>>> >>> >>> >> > |
