Re: Design flaw in Rest_collision

[address@hidden]

On 5 nov. 2012, at 06:51, address@hidden wrote:

> 1) rest->extent (common, Y_AXIS)
> 2) Rest::height
> 3) Rest::generic_extent_callback
> 4) Rest::brew_internal_stencil
> 5) Rest::glyph_name
> 6) Staff_symbol_referencer::get_position
> 7) rest->relative_coordinate (common, Y_AXIS);
> 8) Rest_collision::force_shift_callback_rest
> 9) Rest_collision::calc_positioning_done
> 10) rest->extent (common, Y_AXIS)

A better way to describe it just to wrap heads around it, with the circular 
dependency underlined:

Rest extents depend on their stencil.  This stencil depends on placement on/off 
the staff.  Placement may depend on the placement of other rests.  To calculate 
the placement of other rests, we need to shift all of them.  The amount of 
space one must shift depends on the extent of the rest.

Does anyone see a way to break it?  Or am I thinking through this wrong?

Cheers,
MS