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From: skunkwerk <sku...@gm...> - 2008-07-23 17:07:22
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fixed the problem with uvs outside the 0-1 range. paolo, could you confirm that the rect_packer returns the position of the top-left corner of each texture? thanks, imran On Tue, Jul 22, 2008 at 9:06 PM, skunkwerk <sku...@gm...> wrote: > 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 >>>>> >>>> >>>> >>> >> > |
