Dear Morphemetricians-
I am working on developing a project involving 3D landmark data of primate crania with which I plan to run a series of geometric morphometric analyses. Additionally, in order to make my analysis comparable to previous analyses, I would like to extract some traditional morphometric data from my landmark dataset. I am also planning to designate semilandmark curves using .ply files constructed from 3D point clouds. But my problem is that many of my measurements and the placement of my curves require that I establish a sagittal plane for my entire point configuration. So I have two questions: 1) How would I go about rotating my entire landmark configuration so that the sagittal plane (as designated by a number of midline landmarks) lies along a single axis within the coordinate system? I understand from previous postings how to manually rotate my configuration by 90 degrees, but is there any way to designate that particular points are in the sagittal plane and that those points are along the x, y, or z axis? Are there any programs that this can be done with and then the rotated landmarks coordinates exported? I have been successful using Geomagic to rotate configurations, but then the exported coordinates are completely unordered, which makes them essentially useless. 2) Does anyone know of any programs that can be used with 3D data to extract traditional morphometric data other than simple distances between landmarks? Specifically, I?m looking to measure the angulation of structures against particular planes and also to measure distances as projected onto a particular plane. I?m sure that this could alternatively be done in Excel using multiple complicated algorithms and formulae, but I?m afraid I?m not that mathematically savvy. Thanks so much for your assistance. Claire E. Terhune Ph.D. Student Institute of Human Origins School of Human Evolution and Social Change Box 872402 Arizona State University Tempe, AZ 85287-2402 [EMAIL PROTECTED] -- Replies will be sent to the list. For more information visit http://www.morphometrics.org
