Class VxMeasure

Create accidentals based on the active key and previous accidentals in this voice

convert a smoNote into a vxNote so it can be rasterized

decide whether to force stem direction for multi-voice, or use the default.

create the modifiers for the stave itself, bar lines etc.

Group the notes for beaming and create Vex beam objects

create an a array of VF.StaveNote objects to render the active voice.

Create the VF tuplet objects based on the smo tuplet objects

Create the Vex formatter that calculates the X and Y positions of the notes. A formatter may actually span multiple staves for justified staves. The notes are drawn in their individual vxMeasure objects but formatting is done once for all justified staves

Create all Vex notes and modifiers. We defer the format and rendering so we can align across multiple staves

render is called after format. Actually draw the things.