[Bf-python] Problems with bpy.ops.sculpt.brush_stroke

[Lewis Toohey]

Hi

I have written an add-on for Blender (my first) called "SplineSculpt".
In a nutshell, this add-on uses bpy.ops.sculpt.brush_stroke to sculpt
along the line of a curve object (specifically a curve object
containing a Bezier spline). For background only, full details are
here - http://www.toohey.co.uk/CG-Gallery/?page_id=27

I am struggling with the API, as there is very little detail in the
documentation regarding either bpy.ops.sculpt.brush_stroke or the
parameters of OperatorStrokeElement.

I was wondering if someone might be able to give me a steer on the issues below:

1) One of my goals for this add-on was to be able to draw textures
along the curve using something like the "Rake" option to rotate the
texture along the curve from point to point. I note that drawing using
Blender's built in Paint Curves does obey the Rake option, but I
cannot find any way to make this work with
bpy.ops.sculpt.brush_stroke. Rake is essentially ignored; and

2) I am encountering the problem I describe here -
https://blender.stackexchange.com/questions/96339/problem-with-bpy-ops-sculpt-brush-stroke.
I am convinced this is a bug because the results change depending on
how I orient the Viewport, and yet (to my knowledge) nothing should
really depend on the Viewport orientation.

Any advice or guidance on these points would be greatly appreciated.

Many thanks