adding/ deleting elements to schematics

Folks,

I would like to know if there are simple fuctions that would do the
following, rather than re-inventing the wheel.

given a net name in the schematic i would like to delete that net &
add a elemnet( say a resistor) between the trminals of the net.

Do i need to do the following,
1. get the net & terminals
2. Delet the net( schDelete?)
3. check and see if the net is vertical or horizontal( by coparing the
co-ordinates of the terminals)
4. place the resistor in the appropriate orientation returned by 3
5. connect the resistor to one terminal & place a wire between the
other terminal of the resistor to complete the circuit

Should i do the above in skill, or is there a fancy skil
function/expression to do the above?

Thanks
Partha

 

There isn't any fancy builtin function to do this, but it wouldn't be that hard
using the sch functions.

You obviously need to collect the instTerms connected to the net - or rather
find the instance pins connected to the wires before you delete anything.
Probably using dbDeleteObject of the wire would be sufficient.

You can then use dbCreateInst() to create the component instance, and
schCreateWire to wire it up again (I'd use this, because you can then
use the router built in).

Plus you'd then do an schCheck at the end (probably) to re-extract the
connectivity.

The hardest bit is the heuristic to determine the orientation. Actually,
that's probably not too bad - it will be dealing with the exceptions - what
to do if there's not enough space to fit in the component, what to do
if there are more than two instance terminals on the net, etc, etc.

Andrew.

 

Andrew,
Thankyou,

Partha