yade-dev team mailing list archive

[Bruno Chareyre <bruno.chareyre@xxxxxxxxxxxxxxx>]

On 11/25/2016 06:46 PM, Jerome Duriez wrote:
> Hi,
>
>
> In pkg/pfg/FlowEngine.ipp.in, why do volumeCell() return directly a 
> "volume" value [1], whereas other volumeCell*Fictious() functions 
> return the std::abs() of "volume" [2] ?
Volume [1] is a signed volume and theoreticaly - at least - the sign can 
change over time (if one vertex go across a facet). For volume[2] the 
author (Ema or me I don't remember) apparently speculated that those 
ones would not change sign in a normal situation, which is maybe true 
but it doesn't have to be assumed, it could be a signed volume as well 
with a mechanism to keep the sign in memory (what [1] does).

Bruno