danvenn Posted June 30, 2022 Share Posted June 30, 2022 (edited) I’m trying to compare two meshes with the same topology. Problem is one also has certain amount of drift. What’s the best way to map the deformation to a value? Currently I’m taking some reference point that doesn’t deform so much and trying to align them first, then taking the position deltas. But that alignment method is still a little unstable. Another idea I had is to use the lengths between each neighbour, but I haven’t figured out how to use that data yet. Has anyone done this before? Thanks Edited June 30, 2022 by danvenn Quote Link to comment Share on other sites More sharing options...
Benyee Posted June 30, 2022 Share Posted June 30, 2022 post some files? Quote Link to comment Share on other sites More sharing options...
danvenn Posted July 2, 2022 Author Share Posted July 2, 2022 DefMap.zip Here you go. Let me know if you need some more info on what I'm trying to do. Quote Link to comment Share on other sites More sharing options...
Aizatulin Posted July 2, 2022 Share Posted July 2, 2022 Hi, here is an example (taking your idea using the neighbour distances). If you are applying translation or rotation, the length should stay the same, so the delta between both distances is expected to be zero. On other deformations, the delta should be greater zero. the final delta is just the sum over all delta foreach point (detail attribute). sum_over_delta_nei.hipnc Quote Link to comment Share on other sites More sharing options...
Benyee Posted July 2, 2022 Share Posted July 2, 2022 On 2022/6/30 at 3:02 PM, danvenn said: Currently I’m taking some reference point that doesn’t deform so much and trying to align them first, then taking the position deltas. But that alignment method is still a little unstable. try aligning firstly by using calculated matrix,the matrix comes from comparing 2 poses of the minimum deformed feature points, then get position deltas and apply,hope it helps DefMap_v2.hiplc Quote Link to comment Share on other sites More sharing options...
danvenn Posted July 2, 2022 Author Share Posted July 2, 2022 Hey guys, thanks for the ideas. Quote Link to comment Share on other sites More sharing options...
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