New hair child options:

* Renamed children to "simple" and "interpolated" as this is
  easier to explain and more descriptive than "from particles"
  and "from faces".
* Also shuffled the child ui around a bit to make it clearer.
* Child seed parameter allows to change the seed for children
  independent of the main seed value.
* Long hair mode for interpolated children:
  - Making even haircuts was impossible before as the child
    strand lengths were even, but their root coordinates were
    not similar in relation to the parent strands.
  - The "long hair" option uses the tips of the parent strands
    to calculate the child strand tips.
* Hair parting options:
  - Hair parting can now be calculated dynamically on the fly
    when in 2.49 there was a cumbersome way of using emitter mesh
    seams to define parting lines.
  - For long hair parting can be created by a tip distance/root
    distance threshold. For example setting the minimum threshold
    to 2.0 creates partings between children belonging to parents
    with tip distance of three times the root distance
    ((1+2)*root distance).
  - For short hair the parting thresholds are used as angles
    between the root directions.
* New kink parameters:
  - Kink flatness calculates kink into a shape that would have
    been achieved with an actual curling iron.
  - Kink amplitude clump determines how much the main clump value
    effects the kink amplitude.
  - The beginning of kink is now smoothed to make the hair look
    more natural close to the roots.
* Some bugs fixed along the way too:
  - Child parent's were not determined correctly in some cases.
  - Children didn't always look correct in particle mode.
  - Changing child parameters caused actual particles to be
    recalculated.
* Also cleaned up some deprecated code.

All in all there should be no real changes to how old files look
(except perhaps a bit better!), but the new options should make
hair/fur creation a bit more enjoyable. I'll try to make a video
demonstrating the new stuff shortly.

1 files changed, 5 insertions, 4 deletions

diff --git a/source/blender/blenkernel/intern/pointcache.c b/source/blender/blenkernel/intern/pointcache.c
index 4d96f0508d1..9ad00247dc2 100644
--- a/source/blender/blenkernel/intern/pointcache.c
+++ b/source/blender/blenkernel/intern/pointcache.c
@@ -2252,17 +2252,18 @@ int  BKE_ptcache_object_reset(Scene *scene, Object *ob, int mode)
 	}
 
 	for(psys=ob->particlesystem.first; psys; psys=psys->next) {
-		/* Baked cloth hair has to be checked first, because we don't want to reset */
+		/* children or just redo can be calculated without reseting anything */
+		if(psys->recalc & PSYS_RECALC_REDO || psys->recalc & PSYS_RECALC_CHILD)
+			skip = 1;
+		/* Baked cloth hair has to be checked too, because we don't want to reset */
 		/* particles or cloth in that case -jahka */
-		if(psys->clmd) {
+		else if(psys->clmd) {
 			BKE_ptcache_id_from_cloth(&pid, ob, psys->clmd);
 			if(mode == PSYS_RESET_ALL || !(psys->part->type == PART_HAIR && (pid.cache->flag & PTCACHE_BAKED))) 
 				reset |= BKE_ptcache_id_reset(scene, &pid, mode);
 			else
 				skip = 1;
 		}
-		else if(psys->recalc & PSYS_RECALC_REDO || psys->recalc & PSYS_RECALC_CHILD)
-			skip = 1;
 
 		if(skip == 0 && psys->part) {
 			BKE_ptcache_id_from_particles(&pid, ob, psys);