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# translate sketch points

Member Posts: 3
Hi, I've had a search and can't see advice addressing my issue but happy if someone wants to point me to an existing solution.

In featurescript I'm trying to create a pattern of points upon which to base a spline. I have managed to use the matrix rotation technique here  with success and I have managed to use the for loop function to create several points rotated around an axis.

The challenge I have is that the spline points should be eccentrically rotating around a smaller circle that is in turn rotation around the larger main circle:
The origin of the large circle is the 0,0 axis cross in the bottom left.

My approach was to set the loop to
1. Create a point at X = eccentricity, using:
`var eccentricity = definition.eccentricity; `
```eccentricity /= millimeter;
var pointPoint = vector(eccentricity, 0) * millimeter;```
2. Rotate by the amount equivalent to the "rolling" of the small circle around the large one, using the matrix rotation method linked above:
``var twist2 = [[cos(pointAngle2), -sin(pointAngle2)],[sin(pointAngle2), -cos(pointAngle2)]] as Matrix  ;``

3. Translate the point in X by large_radius + small_radius + eccentricity. This is what I am stuck on...
4. Rotate the now translated point again around the origin by the small angular amount to achieve a sufficient quantity of points to create a decent spline from.

I cannot fathom the translate/transform for the points in the sketch. There aren't any examples I can find ( does anyone know if there are some in a particular FS I could get?) and when I try to follow the matrix rotation pattern approach but for translation ( array "as Vector", rather than "as Matrix") my sketch fails and the error info says "Can not multiply Vector (array) and Vector (array)".