2008/11/24 Sébastien Barthélemy <[EMAIL PROTECTED]>:
> Are you sure ? Here it reports
> ValueError: setting an array element with a sequence.
> probably because theta, sintheta and costheta are 1-d arrays of n>1 elements.
Sorry, I missed that detail.
Cheers
Stéfan
>> def rotx(theta):
>>"""
>>SE(3) matrices corresponding to a rotation around x-axis. Theta is
>> a 1-d array
>>"""
>>costheta = np.cos(theta)
>>sintheta = np.sin(theta)
>>H = np.zeros((theta.size,4,4))
>>H[:,0,0] = 1
>>H[:,3,3] = 1
>>H[:,1,1] = costheta
>>H[
2008/11/21 Sébastien Barthélemy <[EMAIL PROTECTED]>:
> In this spirit, in numpy a set of rotation matrices could be built in
> the following way:
>
> def rotx(theta):
>"""
>SE(3) matrices corresponding to a rotation around x-axis. Theta is
> a 1-d array
>"""
>costheta = np.cos(theta
On Fri, Nov 21, 2008 at 2:57 AM, Sébastien Barthélemy
<[EMAIL PROTECTED]>wrote:
> Hello,
>
> I would like to port a matlab library which provides functions for
> rigid body mechanics such as operations on homogeneous matrices (in
> SE(3)), twists (in se(3)) and so.
>
> In matlab, the library worke
Hello,
I would like to port a matlab library which provides functions for
rigid body mechanics such as operations on homogeneous matrices (in
SE(3)), twists (in se(3)) and so.
In matlab, the library worked on 3d matrices: n homoneous matrices
were stacked along the 3d dimension. This speeded up c
