digital place of Pin[]

[EricYang]

Hi,

As observe the digital place of pin information is about to three as,

<Node(id=178978, name=’b1′) object in cell ‘PS’, xs=’xsec2′, width=0.5, xya=(47.412, 5.433, 13.074), remark=’None’>

It’s possible to adjust the xya information with higher digital place ? say 47.412234 ; to 6 digital place for example.

Thanks,

[Xaveer]

Dear Eric,

Internally the coordinates are stored as floats, so the number of digits is dependent on the machine representation and the operations that have taken place. When written to a GDS file, the xy-coordinates are changed to integers with the least significant digit representing (typically) 1 nm, so three digits when converted to microns.

Just printing the node or pin information just shows a string representation of that object, and the number of digits is not necessarily the same as the internal representation.

See this example:

import nazca as nd

s = nd.strt(length=10).put(1.23456789, 1.23456789, 1.23456789)
print(s.pin['a0'])
print(s.pin['a0'].xya())

which prints

<Node(id=12, name='straight_2_a0_1') object in cell 'straight_2', xs='None', width =1.0, xya=(1.235, 1.235, 181.235), remark='None'>
(1.23456789, 1.23456789, 181.23456789000002)

clearly with more digits.

Xaveer

[Author]

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