On Sun, Feb 28, 2010 at 7:53 PM, Ian Mallett <geometrian@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
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