Ok, thanks. I will try that out.
Edit: works 
Btw I used the arctan to calculate the angle between each point and (0|0), then add an offset to that and draw it down. So basically I transform it to polar first, add the angle I want to turn, and retransform it to rect again.
And you are actually doing that:
X = (X
I * cos a) - (Y
I * sin a) + X
OffsetY = (Y
I * cos a) + (X
I * sin a) + Y
OffsetRight?
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