BUG: incorrect index calculation for "bottom-right to up-left" scan in void Texturing::generateTexturesSubSet(...)

[ChaoJia]

Got Abnormal program termination: received signal 11 (SIGSEGV) in step [11/11] Texturing.

I built and compiled AliceVision with vcpkg and VS 2017 (15.9.12) under Windows 10 from the lastest commit in develop branch (commit 132ac39), and ran the photogrammetry pipeline through python bin/meshroom_photogrammetry.

dataset_monstree/mini3 was used.

After changing

617 unsigned int yoffset = (outTextureSide - y) * outTextureSide;
...
620     unsigned int xyoffset = yoffset + (outTextureSide - x);

to

617 unsigned int yoffset = (outTextureSide - y - 1) * outTextureSide;
...
620     unsigned int xyoffset = yoffset + (outTextureSide - x - 1);

in file ${AliceVision_root}/src/aliceVision/mesh/Texturing.cpp, the problem went away, and the generated texture seems to be correct.

[fabiencastan]

Thanks for the report and the analysis!
We are aware of it and we are about to merge the PR #629 in the coming days which already fixes this issue (and contains texturing improvements).

[ChaoJia]

Thanks!