I have never been motivated enough to write such a tool myself, but I believe it should be relatively easy to have a program that compares a LDraw file and a LDD one, both supposed to contain the same model, and generates directly the line that goes to LDraw.xml.
One would create a LDraw file made from already validated parts, import it in LDD, then add a the same part (eg. colored in red) in both system, using the validated parts to place and orient it. Should be relatively easy to deduce rotation/translation data from that...
One would create a LDraw file made from already validated parts, import it in LDD, then add a the same part (eg. colored in red) in both system, using the validated parts to place and orient it. Should be relatively easy to deduce rotation/translation data from that...