Nijinksy, an incomplete story

I saw this film when it first came out in 1980. Being a former dancer myself and having read the Nijinsky legend since childhood, it could not have been more anticipated. Superb casting, even the two main characters, George de la Pena as Nijinsky and Leslie Browne as Romola, who were at that time dancers by profession and not actors - yet fitted perfectly into the roles. Of course, Alan Bates as Serge Diaghalev could not have been a better choice.
What detail went into this film, directed by Herbert Ross who was himself a dancer and choreograper. The costumes and locations alone must have consumed months of research and preparation.
My only concern was that it failed - by necessity I suppose - to tell the complete story, concentrating on the love triangle that obviously would be more appealing and understood by the general public, and Nijinsky's eventual madness. The real Nijinsky fathered two daughters that he dearly loved. He also made tours all over USA that are completely ignored in the film.
There was an earlier film planned, with Rudolph Nureyev as Nijinsky, but it fell through due to problems with Romola, still alive at the time.
It is a fascinating story and if you get a chance, read the book by Romola that is highly inaccurate as discovered over the years, but even so, a wonderful read.