[Gimp-developer] Warp transform: spacing option

[Julien Hardelin <jm hard wanadoo fr>]

Hello developers,

Sorry to disturb you again : I have difficulty in documenting the 
Spacing option of Warp Transform.

Checking or unchecking this option makes no difference in the result of 
Move pixels.

I thought it could be related to the Stroke periodically option (that 
has a Rate option), but I can see no difference after checking or 
unchecking it also.

And no reference on the Web.

Please help me for these two options.

Julien