1999-08-28  Tor Lillqvist  <tml@iki.fi>

* app/gimpbrushpipe.c: Implement the selection of brush based on
cursor direction, pressure, tilt, or a random value. (Hmm, forgot
velocity, later.) (In addition to just incrementally stepping.)
Read the brush pipe parameters from the gih file's second line.
There is no way to tune the parameters in the GIMP, they must
currently be set when saving the gih file (in the gpb plug-in).

* app/gimpbrushpipe.h
* app/gimpbrushpipeP.h: Move the PipeSelectModes enum to the
"private" header. Add a stride array to GimpBrushPipe to make
indexing easier.

* plug-ins/common/gpb.c: Add selection mode fields to the dialog.
Attach the pipe parameters entered as a parasite, too.

* docs/parasites.txt
* plug-ins/common/psp.c: Use "placement", not "spacing" (which
means another thing).