viaFindTransitions

viaFindTransitions(
t_constraintGroupSetup
t_topLayerName
t_bottomLayerName
) 
=> l_viaTransitionsObject / nil

Returns the list of transitions of the given constraint group setup object found between the specified top and bottom layers.

t_constraintGroupSetup
	This object is retrieved as follows: viaOptions = viaGetOptions(constraintGroupId) constraintGroupSetup = viaOptions~>constraintGroupSetup
t_topLayerName	The name of the top layer.
t_bottomLayerName	The name of the bottom layer.

l_viaTransitionsObject
	Returns a list of via transitions objects representing the transition between the specified top layer and bottom layer.
`nil`	Returns `nil` if the top layer name or bottom layer name or both are not found in the `t_constraintGroupSetup` object or if there is no transition path between the top and bottom layers.

techFile = techGetTechFile(ddGetObj("gpdk090"))

constraintGroupId = cstFindConstraintGroupIn(techFile "virtuosoDefaultSetup")

myViaOptions = viaGetViaOptions(constraintGroupId)

transitionList = viaFindTransitions(myViaOptions~>constraintGroupSetup "Metal4" "Metal1")

transitionList~>??

 ((topLayer "Metal4" bottomLayer "Metal3" transitionEnabled

 t viaDef "M4_M3" cutClass "Auto"

 cutClassOrientation "auto" userCutSpacingEnabled nil userCutSpacingX

 0.0 userCutSpacingY 0.0

  (topLayer "Metal3" bottomLayer "Metal2" transitionEnabled

 t viaDef "M3_M2" cutClass "Auto"

 cutClassOrientation "auto" userCutSpacingEnabled nil userCutSpacingX

 0.0 userCutSpacingY 0.0

  (topLayer "Metal2" bottomLayer "Metal1" transitionEnabled

 t viaDef "M2_M1" cutClass "Auto"

 cutClassOrientation "auto" userCutSpacingEnabled nil userCutSpacingX

 0.0 userCutSpacingY 0.0