R help - Jun 2016 - About the parameters of rotationMatrix

Hi,

Why does this not work? The values inside the rotationMatrix() doesn't 
seem to change:

library(rgl)

for(i in 1: 10)
{
     a2=i*0.1; b2=i*0.2; c2=i*0.3
     print(c(a2,b2,c2))
     UserMatrix = rotationMatrix(pi/4,a2,b2,c2)
     print(UserMatrix)
}

Yours,

Atte Tenkanen

On 21/06/2016 6:50 AM, Atte Tenkanen wrote:
> Hi,
>
> Why does this not work? The values inside the rotationMatrix() doesn't
> seem to change:
>
> library(rgl)
>
> for(i in 1: 10)
> {
>       a2=i*0.1; b2=i*0.2; c2=i*0.3
>       print(c(a2,b2,c2))
>       UserMatrix = rotationMatrix(pi/4,a2,b2,c2)
>       print(UserMatrix)
> }
>
You are rotating by a constant amount about a sequence of parallel 
vectors.  Only the length of the vectors is changing.

If you want to see a change, you need to use a different rotation axis, 
or a different amount of rotation.

Duncan Murdoch

Oh, thanks... ;-)

Atte

21.6.2016, 17.30, Duncan Murdoch kirjoitti:
> for(i in 1: 10)
> {
>       a2=i*0.1; b2=i*0.2; c2=i*0.3
>       print(c(a2,b2,c2))
>       UserMatrix = rotationMatrix(pi/4,a2,b2,c2)
>       print(UserMatrix)
> }