On Sun, Feb 28, 2010 at 7:53 PM, Ian Mallett <geometr...@gmail.com> wrote: > Hi, > > I have a list of vec3 lists (e.g. [[1,2,3],[4,5,6],[7,8,9],...]). To every > single one of the vec3 sublists, I am currently applying transformations. I > need to optimize this with numpy. > > To get proper results, as far as I can tell, the vec3 lists must be > expressed as vec4s: [[1,2,3],[4,5,6],[7,8,9],...] -> > [[1,2,3,1],[4,5,6,1],[7,8,9,1],...]. Each of these needs to be multiplied > by either a translation matrix, or a rotation and translation matrix. > > I don't really know how to approach the problem . . .
I'm not sure what exactly you need but it sounds similar to "Row-wise dot product" in numpy-discussion Sept 2009 there are several threads on rotation matrix, which might be useful depending on the structure of your arrays Josef > > Thanks, > Ian > > _______________________________________________ > NumPy-Discussion mailing list > NumPy-Discussion@scipy.org > http://mail.scipy.org/mailman/listinfo/numpy-discussion > > _______________________________________________ NumPy-Discussion mailing list NumPy-Discussion@scipy.org http://mail.scipy.org/mailman/listinfo/numpy-discussion
