Moving essential stuff into PDK

contact.py

@@ -2,6 +2,7 @@ import gdsfactory as gf
 from gdsfactory.components.compass import compass
 
 from librepdk.structure import LibrePDKStructure
+import librepdk.helper as lph
 
 class ViaStripe(LibrePDKStructure):
 	device_layers = ['nwell','ndiffusion','pdiffusion', 'poly', 'pwell',]
@@ -52,10 +53,10 @@ class ViaStripe(LibrePDKStructure):
 			vlid = self.config.get_layer_id(vln)
 			space = self.config.get_min_spacing((vln,vln))
 			vdim = self.config.get_via_size(vln)
-			vs = self.to_nm(vdim)
+			vs = lph.to_nm(self.config, vdim)
 			vr = gf.components.rectangle(size=(vs,vs), layer=vlid)
-			dxy = self.to_nm(-vdim/2)
-			via << vr.move(self.snap_to_grid([dxy,dxy]))
+			dxy = lph.to_nm(self.config, -vdim/2)
+			via << vr.move([dxy,dxy])
 			# find spacing of largest via layer
 			if vdim > maxdim:
 				maxdim = vdim
@@ -91,17 +92,17 @@ class ViaStripe(LibrePDKStructure):
 				h = hn
 
 			# centering the via group
-			sp = self.to_nm(spacing+maxdim)
+			sp = lph.to_nm(self.config, spacing+maxdim)
 			varr = gf.components.array(component=via, spacing=(sp, sp), columns=col, rows=row)
 			if self.less_vias:
-				dcpx = (self.to_nm(w+spacing)-varr.xsize)/2
-				dcpy = (self.to_nm(h+spacing)-varr.ysize)/2
+				dcpx = (lph.to_nm(self.config, w+spacing)-varr.xsize)/2
+				dcpy = (lph.to_nm(self.config, h+spacing)-varr.ysize)/2
 			else:
-				dcpx = dcpy = self.to_nm((maxdim+spacing)/2)
+				dcpx = dcpy = lph.to_nm(self.config, (maxdim+spacing)/2)
 
-			self << varr.move(self.snap_to_grid([dcpx, dcpy]))
+			self << varr.move(lph.snap_to_grid(self.config, [dcpx, dcpy]))
 
-		s = (self.to_nm(w),self.to_nm(h))
+		s = (lph.to_nm(self.config, w),lph.to_nm(self.config, h))
 		for mln in metalstackup:
 			lid = self.config.get_layer_id(mln)
 			r1 = gf.components.rectangle(size=s, layer=lid)

helper.py

+def value_to_grid(config, val):
+	g = config.get_grid()
+	r = int(round(val/g)*int(g))
+	return r
+
+def to_nm(config, val):
+	if val == 0:
+		return 0
+	ret = val.m_as(config.ureg.m)/config.get_dbunit()
+	return value_to_grid(config, ret)
+
+def snap_to_grid(config, val):
+	x = value_to_grid(config, val[0])
+	y = value_to_grid(config, val[1])
+	return [x,y]
+
+