Shape Rotation by script

Aaron_C

Dear all,

I would like to rotate a shape by script.
For example,

I use this following script can create a shape:

startx = ring_centerx - rbendring # The x coordination of grating waveguide
starty = ring_centery # The y coordination of grating waveguide
wg_left = RBA::Box::new_lbrt( startx - w_o * 0.5, starty , startx - w_o * 0.5 - etchw, starty + wglen2)
topcell.shapes( layer_id2 ).insert_box( wg_left )
wg_right = RBA::Box::new_lbrt( startx + w_o * 0.5, starty , startx + w_o * 0.5 + etchw, starty + wglen2)
topcell.shapes( layer_id2 ).insert_box( wg_right )

How can I rotate the shape by 15 degree by ruby script?

Thank you very much.

Aaron

Matthias

Hi Aaron,

you'd like to rotate the box before you insert it?

Well, the solution is to use a polygon (a box won't rotate by an arbitrary angle) and to use a transformation:

# Rotation by 15 degree, no mag, no mirror, no displacement
rot15 = RBA::ICplxTrans::new(1, 15, false, RBA::Point::new)

wg_left = RBA::Box::new_lbrt( startx - w_o * 0.5, starty , startx - w_o * 0.5 - etchw, starty + wglen2)
topcell.shapes( layer_id2 ).insert(RBA::Polygon::new(wg_left).transformed(rot15))

Matthias

Aaron_C

Dear Matthias

This is exactly what I want. But I still have another question.
The rotation corresponds to the origin (0,0), right?
How can I move the shape before I insert it?

Thank you very much~

Aaron

Matthias

Hi Aaron,

the displacement is the forth parameter of the ICplxTrans constructor. The other parameters are: magnification, rotation angle, mirror flag.

The operations are applied in that order: magnification, mirror (at x axis), rotation and finally displacement.

Matthias

Aaron_C

Thank you very much~