Disconnect/connect hair:

- Moves hair from face-space to global space and back.
- Allows for editing of emitter mesh after hair combing.
- Disconnect hair before doing topology changing changes in mesh edit mode, connect after changes.
- Notes:
	* The closest location on emitter surface to the hair root is used to connect the hair.
	* Emitter deflection, sticky roots and add brush don't apply for disconnect hair in particle mode.
- Todo for future:
	* Copy disconnected hair from object to another (when 2.5 has proper copy operators again).
	* Possible automatic disconnect/connect with topology changing operations in mesh edit mode.
	
Other changes/fixes:
- Proper subtypes for some particle mode notifiers.
- Particle mode selections didn't draw correctly because of using lighting for the paths.

12 files changed, 289 insertions, 43 deletions

diff --git a/source/blender/blenkernel/BKE_pointcache.h b/source/blender/blenkernel/BKE_pointcache.h
index 9ba34091064..b7ab07b0f91 100644
--- a/source/blender/blenkernel/BKE_pointcache.h
+++ b/source/blender/blenkernel/BKE_pointcache.h
@@ -192,6 +192,7 @@ typedef struct PTCacheUndo {
 	struct ParticleData *particles;
 	struct KDTree *emitter_field;
 	float *emitter_cosnos;
+	int psys_flag;
 
 	/* cache stuff */
 	struct ListBase mem_cache;
diff --git a/source/blender/blenkernel/intern/particle.c b/source/blender/blenkernel/intern/particle.c
index 81eb0b79c40..0ba2f357a1f 100644
--- a/source/blender/blenkernel/intern/particle.c
+++ b/source/blender/blenkernel/intern/particle.c
@@ -418,7 +418,7 @@ void psys_free_path_cache(ParticleSystem *psys, PTCacheEdit *edit)
 		edit->pathcache= NULL;
 		edit->totcached= 0;
 	}
-	else {
+	if(psys) {
 		psys_free_path_cache_buffers(psys->pathcache, &psys->pathcachebufs);
 		psys->pathcache= NULL;
 		psys->totcached= 0;
@@ -2676,7 +2676,7 @@ void psys_cache_paths(Scene *scene, Object *ob, ParticleSystem *psys, float cfra
 	baked = psys->pointcache->flag & PTCACHE_BAKED;
 
 	/* clear out old and create new empty path cache */
-	psys_free_path_cache(psys, NULL);
+	psys_free_path_cache(psys, psys->edit);
 	cache= psys->pathcache= psys_alloc_path_cache_buffers(&psys->pathcachebufs, totpart, steps+1);
 
 	if(psys->soft && psys->softflag & OB_SB_ENABLE) {
@@ -2891,7 +2891,7 @@ void psys_cache_edit_paths(Scene *scene, Object *ob, PTCacheEdit *edit, float cf
 
 	if(!cache || edit->totpoint != edit->totcached) {
 		/* clear out old and create new empty path cache */
-		psys_free_path_cache(NULL, edit);
+		psys_free_path_cache(edit->psys, edit);
 		cache= edit->pathcache= psys_alloc_path_cache_buffers(&edit->pathcachebufs, totpart, steps+1);
 	}
 
@@ -2946,7 +2946,7 @@ void psys_cache_edit_paths(Scene *scene, Object *ob, PTCacheEdit *edit, float cf
 			do_particle_interpolation(psys, i, pa, t, frs_sec, &pind, &result);
 
 			 /* non-hair points are allready in global space */
-			if(psys)
+			if(psys && !(psys->flag & PSYS_GLOBAL_HAIR))
 				Mat4MulVecfl(hairmat, result.co);
 
 			VECCOPY(ca->co, result.co);
diff --git a/source/blender/blenkernel/intern/particle_system.c b/source/blender/blenkernel/intern/particle_system.c
index eb570ba287c..1931b89af38 100644
--- a/source/blender/blenkernel/intern/particle_system.c
+++ b/source/blender/blenkernel/intern/particle_system.c
@@ -158,7 +158,7 @@ void psys_reset(ParticleSystem *psys, int mode)
 	psys->totchild= 0;
 
 	/* reset path cache */
-	psys_free_path_cache(psys, NULL);
+	psys_free_path_cache(psys, psys->edit);
 
 	/* reset point cache */
 	psys->pointcache->flag &= ~PTCACHE_SIMULATION_VALID;
diff --git a/source/blender/editors/physics/editparticle.c b/source/blender/editors/physics/editparticle.c
index bc48d8f4f55..0f5e677b912 100644
--- a/source/blender/editors/physics/editparticle.c
+++ b/source/blender/editors/physics/editparticle.c
@@ -555,7 +555,7 @@ static void foreach_mouse_hit_key(PEData *data, ForKeyMatFunc func, int selected
 	Mat4One(mat);
 
 	LOOP_VISIBLE_POINTS {
-		if(edit->psys) {
+		if(edit->psys && !(edit->psys->flag & PSYS_GLOBAL_HAIR)) {
 			psys_mat_hair_to_global(data->ob, psmd->dm, psys->part->from, psys->particles + p, mat);
 			Mat4Invert(imat,mat);
 		}
@@ -812,7 +812,7 @@ static void pe_deflect_emitter(Scene *scene, Object *ob, PTCacheEdit *edit)
 	float *vec, *nor, dvec[3], dot, dist_1st;
 	float hairimat[4][4], hairmat[4][4];
 
-	if(edit==NULL || edit->psys==NULL || (pset->flag & PE_DEFLECT_EMITTER)==0)
+	if(edit==NULL || edit->psys==NULL || (pset->flag & PE_DEFLECT_EMITTER)==0 || (edit->psys->flag & PSYS_GLOBAL_HAIR))
 		return;
 
 	psys = edit->psys;
@@ -876,6 +876,9 @@ void PE_apply_lengths(Scene *scene, PTCacheEdit *edit)
 	if(edit==0 || (pset->flag & PE_KEEP_LENGTHS)==0)
 		return;
 
+	if(edit->psys && edit->psys->flag & PSYS_GLOBAL_HAIR)
+		return;
+
 	LOOP_EDITED_POINTS {
 		LOOP_KEYS {
 			if(k) {
@@ -899,10 +902,10 @@ static void pe_iterate_lengths(Scene *scene, PTCacheEdit *edit)
 	float dv1[3]= {0.0f, 0.0f, 0.0f};
 	float dv2[3]= {0.0f, 0.0f, 0.0f};
 
-	if(edit==0)
+	if(edit==0 || (pset->flag & PE_KEEP_LENGTHS)==0)
 		return;
 
-	if((pset->flag & PE_KEEP_LENGTHS)==0)
+	if(edit->psys && edit->psys->flag & PSYS_GLOBAL_HAIR)
 		return;
 
 	LOOP_EDITED_POINTS {
@@ -1057,11 +1060,13 @@ static void update_world_cos(Object *ob, PTCacheEdit *edit)
 		return;
 
 	LOOP_POINTS {
-		psys_mat_hair_to_global(ob, psmd->dm, psys->part->from, psys->particles+p, hairmat);
+		if(!(psys->flag & PSYS_GLOBAL_HAIR))
+			psys_mat_hair_to_global(ob, psmd->dm, psys->part->from, psys->particles+p, hairmat);
 
 		LOOP_KEYS {
 			VECCOPY(key->world_co,key->co);
-			Mat4MulVecfl(hairmat, key->world_co);
+			if(!(psys->flag & PSYS_GLOBAL_HAIR))
+				Mat4MulVecfl(hairmat, key->world_co);
 		}
 	}
 }
@@ -1480,7 +1485,7 @@ int PE_lasso_select(bContext *C, short mcords[][2], short moves, short select)
 	Mat4One(mat);
 
 	LOOP_VISIBLE_POINTS {
-		if(edit->psys)
+		if(edit->psys && !(psys->flag & PSYS_GLOBAL_HAIR))
 			psys_mat_hair_to_global(ob, psmd->dm, psys->part->from, psys->particles + p, mat);
 
 		if(pset->selectmode==SCE_SELECT_POINT) {
@@ -1777,7 +1782,8 @@ static void rekey_particle(PEData *data, int pa_index)
 	for(k=0, key=pa->hair; k<pa->totkey; k++, key++, ekey++) {
 		ekey->co= key->co;
 		ekey->time= &key->time;
-		ekey->flag |= PEK_USE_WCO;
+		if(!(psys->flag & PSYS_GLOBAL_HAIR))
+			ekey->flag |= PEK_USE_WCO;
 	}
 
 	pa->flag &= ~PARS_REKEY;
@@ -2059,7 +2065,9 @@ static void subdivide_particle(PEData *data, int pa_index)
 
 			nekey->co= nkey->co;
 			nekey->time= &nkey->time;
-			nekey->flag |= (PEK_SELECT|PEK_USE_WCO);
+			nekey->flag |= PEK_SELECT;
+			if(!(psys->flag & PSYS_GLOBAL_HAIR))
+				nekey->flag |= PEK_USE_WCO;
 
 			nekey++;
 			nkey++;
@@ -2129,6 +2137,9 @@ static int remove_doubles_exec(bContext *C, wmOperator *op)
 	float mat[4][4], co[3], threshold= RNA_float_get(op->ptr, "threshold");
 	int n, totn, removed, flag, totremoved;
 
+	if(psys->flag & PSYS_GLOBAL_HAIR)
+		return OPERATOR_CANCELLED;
+
 	edit= psys->edit;
 	psmd= psys_get_modifier(ob, psys);
 	totremoved= 0;
@@ -2400,6 +2411,9 @@ static void PE_mirror_x(Scene *scene, Object *ob, int tagged)
 	int *mirrorfaces;
 	int rotation, totpart, newtotpart;
 
+	if(psys->flag & PSYS_GLOBAL_HAIR)
+		return;
+
 	psmd= psys_get_modifier(ob, psys);
 
 	mirrorfaces= mesh_get_x_mirror_faces(ob, NULL);
@@ -2750,7 +2764,7 @@ static void brush_puff(PEData *data, int point_index)
 	float mat[4][4], imat[4][4];
 	float lastco[3], rootco[3], co[3], nor[3], kco[3], dco[3], fac, length;
 
-	if(psys) {
+	if(psys && !(psys->flag & PSYS_GLOBAL_HAIR)) {
 		psys_mat_hair_to_global(data->ob, data->dm, psys->part->from, psys->particles + point_index, mat);
 		Mat4Invert(imat,mat);
 	}
@@ -2849,6 +2863,9 @@ static void brush_add(PEData *data, short number)
 	DerivedMesh *dm=0;
 	Mat4Invert(imat,ob->obmat);
 
+	if(psys->flag & PSYS_GLOBAL_HAIR)
+		return;
+
 	BLI_srandom(psys->seed+data->mval[0]+data->mval[1]);
 	
 	/* painting onto the deformed mesh, could be an option? */
@@ -3070,6 +3087,7 @@ static void brush_edit_apply(bContext *C, wmOperator *op, PointerRNA *itemptr)
 	float vec[3], mousef[2];
 	short mval[2], mvalo[2];
 	int flip, mouse[2], dx, dy, removed= 0, selected= 0;
+	int lock_root = pset->flag & PE_LOCK_FIRST;
 
 	if(!PE_start_edit(edit))
 		return;
@@ -3093,6 +3111,10 @@ static void brush_edit_apply(bContext *C, wmOperator *op, PointerRNA *itemptr)
 	mvalo[0]= bedit->lastmouse[0];
 	mvalo[1]= bedit->lastmouse[1];
 
+	/* disable locking temporatily for disconnected hair */
+	if(edit->psys && edit->psys->flag & PSYS_GLOBAL_HAIR)
+		pset->flag &= ~PE_LOCK_FIRST;
+
 	if(((pset->brushtype == PE_BRUSH_ADD) ?
 		(sqrt(dx * dx + dy * dy) > pset->brush[PE_BRUSH_ADD].step) : (dx != 0 || dy != 0))
 		|| bedit->first) {
@@ -3248,6 +3270,8 @@ static void brush_edit_apply(bContext *C, wmOperator *op, PointerRNA *itemptr)
 		bedit->lastmouse[1]= mouse[1];
 		bedit->first= 0;
 	}
+
+	pset->flag |= lock_root;
 }
 
 static void brush_edit_exit(bContext *C, wmOperator *op)
@@ -3382,6 +3406,8 @@ static void make_PTCacheUndo(PTCacheEdit *edit, PTCacheUndo *undo)
 
 		for(i=0; i<edit->totpoint; i++, pa++)
 			pa->hair= MEM_dupallocN(pa->hair);
+
+		undo->psys_flag = edit->psys->flag;
 	}
 	else {
 		PTCacheMem *pm;
@@ -3449,6 +3475,8 @@ static void get_PTCacheUndo(PTCacheEdit *edit, PTCacheUndo *undo)
 				hkey++;
 			}
 		}
+
+		psys->flag = undo->psys_flag;
 	}
 	else {
 		PTCacheMem *pm;
@@ -3704,7 +3732,8 @@ static void PE_create_particle_edit(Scene *scene, Object *ob, PointCache *cache,
 					key->co= hkey->co;
 					key->time= &hkey->time;
 					key->flag= hkey->editflag;
-					key->flag |= PEK_USE_WCO;
+					if(!(psys->flag & PSYS_GLOBAL_HAIR))
+						key->flag |= PEK_USE_WCO;
 					hkey++;
 				}
 				pa++;
@@ -3828,6 +3857,7 @@ static int clear_edited_exec(bContext *C, wmOperator *op)
 			psys->free_edit = NULL;
 
 			psys->recalc |= PSYS_RECALC_RESET;
+			psys->flag &= ~PSYS_GLOBAL_HAIR;
 
 			psys_reset(psys, PSYS_RESET_DEPSGRAPH);
 			DAG_id_flush_update(&ob->id, OB_RECALC_DATA);
diff --git a/source/blender/editors/space_buttons/buttons_intern.h b/source/blender/editors/space_buttons/buttons_intern.h
index 8ed17ab1fa8..0a5a5714a06 100644
--- a/source/blender/editors/space_buttons/buttons_intern.h
+++ b/source/blender/editors/space_buttons/buttons_intern.h
@@ -85,6 +85,8 @@ void PARTICLE_OT_new_target(struct wmOperatorType *ot);
 void PARTICLE_OT_remove_target(struct wmOperatorType *ot);
 void PARTICLE_OT_target_move_up(struct wmOperatorType *ot);
 void PARTICLE_OT_target_move_down(struct wmOperatorType *ot);
+void PARTICLE_OT_connect_hair(struct wmOperatorType *ot);
+void PARTICLE_OT_disconnect_hair(struct wmOperatorType *ot);
 
 void SCENE_OT_render_layer_add(struct wmOperatorType *ot);
 void SCENE_OT_render_layer_remove(struct wmOperatorType *ot);
diff --git a/source/blender/editors/space_buttons/buttons_ops.c b/source/blender/editors/space_buttons/buttons_ops.c
index 8cdc6b0cd2b..60480a9f165 100644
--- a/source/blender/editors/space_buttons/buttons_ops.c
+++ b/source/blender/editors/space_buttons/buttons_ops.c
@@ -35,6 +35,8 @@
 #include "DNA_group_types.h"
 #include "DNA_object_types.h"
 #include "DNA_material_types.h"
+#include "DNA_meshdata_types.h"
+#include "DNA_modifier_types.h"
 #include "DNA_node_types.h"
 #include "DNA_texture_types.h"
 #include "DNA_scene_types.h"
@@ -42,8 +44,11 @@
 #include "DNA_space_types.h"
 #include "DNA_world_types.h"
 
+#include "BKE_bvhutils.h"
+#include "BKE_cdderivedmesh.h"
 #include "BKE_context.h"
 #include "BKE_depsgraph.h"
+#include "BKE_DerivedMesh.h"
 #include "BKE_group.h"
 #include "BKE_font.h"
 #include "BKE_library.h"
@@ -51,11 +56,13 @@
 #include "BKE_material.h"
 #include "BKE_node.h"
 #include "BKE_particle.h"
+#include "BKE_pointcache.h"
 #include "BKE_scene.h"
 #include "BKE_texture.h"
 #include "BKE_utildefines.h"
 #include "BKE_world.h"
 
+#include "BLI_arithb.h"
 #include "BLI_editVert.h"
 #include "BLI_listbase.h"
 
@@ -838,6 +845,217 @@ void PARTICLE_OT_target_move_down(wmOperatorType *ot)
 	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
 }
 
+/************************ connect/disconnect hair operators *********************/
+
+static void disconnect_hair(Scene *scene, Object *ob, ParticleSystem *psys)
+{
+	ParticleSystemModifierData *psmd = psys_get_modifier(ob,psys);
+	ParticleData *pa = psys->particles;
+	PTCacheEdit *edit = psys->edit;
+	PTCacheEditPoint *point = edit ? edit->points : NULL;
+	PTCacheEditKey *ekey = NULL;
+	HairKey *key;
+	int i, k;
+	float hairmat[4][4];
+
+	if(!ob || !psys || psys->flag & PSYS_GLOBAL_HAIR)
+		return;
+
+	if(!psys->part || psys->part->type != PART_HAIR)
+		return;
+
+	for(i=0; i<psys->totpart; i++,pa++) {
+		if(point) {
+			ekey = point->keys;
+			point++;
+		}
+
+		psys_mat_hair_to_global(ob, psmd->dm, psys->part->from, pa, hairmat);
+
+		for(k=0,key=pa->hair; k<pa->totkey; k++,key++) {
+			Mat4MulVecfl(hairmat,key->co);
+			
+			if(ekey) {
+				ekey->flag &= ~PEK_USE_WCO;
+				ekey++;
+			}
+		}
+	}
+
+	psys_free_path_cache(psys, psys->edit);
+
+	psys->flag |= PSYS_GLOBAL_HAIR;
+
+	PE_update_object(scene, ob, 0);
+}
+
+static int disconnect_hair_exec(bContext *C, wmOperator *op)
+{
+	Scene *scene= CTX_data_scene(C);
+	Object *ob= CTX_data_pointer_get_type(C, "object", &RNA_Object).data;
+	PointerRNA ptr = CTX_data_pointer_get_type(C, "particle_system", &RNA_ParticleSystem);
+	ParticleSystem *psys= NULL;
+	int all = RNA_boolean_get(op->ptr, "all");
+
+	if(!ob)
+		return OPERATOR_CANCELLED;
+
+	if(all) {
+		for(psys=ob->particlesystem.first; psys; psys=psys->next) {
+			disconnect_hair(scene, ob, psys);
+		}
+	}
+	else {
+		psys = ptr.data;
+		disconnect_hair(scene, ob, psys);
+	}
+
+	WM_event_add_notifier(C, NC_OBJECT|ND_DRAW, ob);
+
+	return OPERATOR_FINISHED;
+}
+
+void PARTICLE_OT_disconnect_hair(wmOperatorType *ot)
+{
+	ot->name= "Disconnect Hair";
+	ot->description= "Disconnect hair from the emitter mesh.";
+	ot->idname= "PARTICLE_OT_disconnect_hair";
+
+	ot->exec= disconnect_hair_exec;
+	
+	/* flags */
+	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
+
+	RNA_def_boolean(ot->srna, "all", 0, "All hair", "Disconnect all hair systems from the emitter mesh");
+}
+
+static void connect_hair(Scene *scene, Object *ob, ParticleSystem *psys)
+{
+	ParticleSystemModifierData *psmd = psys_get_modifier(ob,psys);
+	ParticleData *pa = psys->particles;
+	PTCacheEdit *edit = psys->edit;
+	PTCacheEditPoint *point = edit ? edit->points : NULL;
+	PTCacheEditKey *ekey;
+	HairKey *key;
+	BVHTreeFromMesh bvhtree;
+	BVHTreeNearest nearest;
+	MFace *mface;
+	DerivedMesh *dm = CDDM_copy(psmd->dm);
+	int numverts = dm->getNumVerts (dm);
+	int i, k;
+	float hairmat[4][4], imat[4][4];
+	float v[4][3], vec[3];
+
+	if(!psys || !psys->part || psys->part->type != PART_HAIR)
+		return;
+
+	memset( &bvhtree, 0, sizeof(bvhtree) );
+
+	/* convert to global coordinates */
+	for (i=0; i<numverts; i++)
+		Mat4MulVecfl (ob->obmat, CDDM_get_vert(dm, i)->co);
+
+	bvhtree_from_mesh_faces(&bvhtree, dm, 0.0, 2, 6);
+
+	for(i=0; i<psys->totpart; i++,pa++) {
+		key = pa->hair;
+
+		nearest.index = -1;
+		nearest.dist = FLT_MAX;
+
+		BLI_bvhtree_find_nearest(bvhtree.tree, key->co, &nearest, bvhtree.nearest_callback, &bvhtree);
+
+		if(nearest.index == -1) {
+			printf("No nearest point found for hair root!");
+			continue;
+		}
+
+		mface = CDDM_get_face(dm,nearest.index);
+
+		VecCopyf(v[0], CDDM_get_vert(dm,mface->v1)->co);
+		VecCopyf(v[1], CDDM_get_vert(dm,mface->v2)->co);
+		VecCopyf(v[2], CDDM_get_vert(dm,mface->v3)->co);
+		if(mface->v4) {
+			VecCopyf(v[3], CDDM_get_vert(dm,mface->v4)->co);
+			MeanValueWeights(v, 4, nearest.co, pa->fuv);
+		}
+		else
+			MeanValueWeights(v, 3, nearest.co, pa->fuv);
+
+		pa->num = nearest.index;
+		pa->num_dmcache = psys_particle_dm_face_lookup(ob,psmd->dm,pa->num,pa->fuv,NULL);
+		
+		psys_mat_hair_to_global(ob, psmd->dm, psys->part->from, pa, hairmat);
+		Mat4Invert(imat,hairmat);
+
+		VECSUB(vec, nearest.co, key->co);
+
+		if(point) {
+			ekey = point->keys;
+			point++;
+		}
+
+		for(k=0,key=pa->hair; k<pa->totkey; k++,key++) {
+			VECADD(key->co, key->co, vec);
+			Mat4MulVecfl(imat,key->co);
+
+			if(ekey) {
+				ekey->flag |= PEK_USE_WCO;
+				ekey++;
+			}
+		}
+	}
+
+	free_bvhtree_from_mesh(&bvhtree);
+	dm->release(dm);
+
+	psys_free_path_cache(psys, psys->edit);
+
+	psys->flag &= ~PSYS_GLOBAL_HAIR;
+
+	PE_update_object(scene, ob, 0);
+}
+
+static int connect_hair_exec(bContext *C, wmOperator *op)
+{
+	Scene *scene= CTX_data_scene(C);
+	Object *ob= CTX_data_pointer_get_type(C, "object", &RNA_Object).data;
+	PointerRNA ptr = CTX_data_pointer_get_type(C, "particle_system", &RNA_ParticleSystem);
+	ParticleSystem *psys= NULL;
+	int all = RNA_boolean_get(op->ptr, "all");
+
+	if(!ob)
+		return OPERATOR_CANCELLED;
+
+	if(all) {
+		for(psys=ob->particlesystem.first; psys; psys=psys->next) {
+			connect_hair(scene, ob, psys);
+		}
+	}
+	else {
+		psys = ptr.data;
+		connect_hair(scene, ob, psys);
+	}
+
+	WM_event_add_notifier(C, NC_OBJECT|ND_DRAW, ob);
+
+	return OPERATOR_FINISHED;
+}
+
+void PARTICLE_OT_connect_hair(wmOperatorType *ot)
+{
+	ot->name= "Connect Hair";
+	ot->description= "Connect hair to the emitter mesh.";
+	ot->idname= "PARTICLE_OT_connect_hair";
+
+	ot->exec= connect_hair_exec;
+	
+	/* flags */
+	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
+
+	RNA_def_boolean(ot->srna, "all", 0, "All hair", "Connect all hair systems to the emitter mesh");
+}
+
 /********************** render layer operators *********************/
 
 static int render_layer_add_exec(bContext *C, wmOperator *op)
diff --git a/source/blender/editors/space_buttons/space_buttons.c b/source/blender/editors/space_buttons/space_buttons.c
index 5d1dbe47345..385f55b71c1 100644
--- a/source/blender/editors/space_buttons/space_buttons.c
+++ b/source/blender/editors/space_buttons/space_buttons.c
@@ -204,6 +204,8 @@ void buttons_operatortypes(void)
 	WM_operatortype_append(PARTICLE_OT_remove_target);
 	WM_operatortype_append(PARTICLE_OT_target_move_up);
 	WM_operatortype_append(PARTICLE_OT_target_move_down);
+	WM_operatortype_append(PARTICLE_OT_connect_hair);
+	WM_operatortype_append(PARTICLE_OT_disconnect_hair);
 
 	WM_operatortype_append(SCENE_OT_render_layer_add);
 	WM_operatortype_append(SCENE_OT_render_layer_remove);
diff --git a/source/blender/editors/space_view3d/drawobject.c b/source/blender/editors/space_view3d/drawobject.c
index 25ff1244254..57e7d897e24 100644
--- a/source/blender/editors/space_view3d/drawobject.c
+++ b/source/blender/editors/space_view3d/drawobject.c
@@ -3749,7 +3749,6 @@ static void draw_ptcache_edit(Scene *scene, View3D *v3d, RegionView3D *rv3d, Obj
 	nosel_col[1]=(float)nosel[1]/255.0f;
 	nosel_col[2]=(float)nosel[2]/255.0f;
 
-
 	/* draw paths */
 	if(timed) {
 		glEnable(GL_BLEND);
@@ -3758,24 +3757,16 @@ static void draw_ptcache_edit(Scene *scene, View3D *v3d, RegionView3D *rv3d, Obj
 	}
 
 	glEnableClientState(GL_VERTEX_ARRAY);
-
-	/* solid shaded with lighting */
-	glEnableClientState(GL_NORMAL_ARRAY);
+	glDisableClientState(GL_NORMAL_ARRAY);
 	glEnableClientState(GL_COLOR_ARRAY);
 
 	glEnable(GL_COLOR_MATERIAL);
 	glColorMaterial(GL_FRONT_AND_BACK, GL_DIFFUSE);
 
-	/* only draw child paths with lighting */
-	if(dt > OB_WIRE)
-		glEnable(GL_LIGHTING);
-
-	/* draw paths without lighting */
 	cache=edit->pathcache;
 	for(i=0; i<totpoint; i++){
 		path = cache[i];
 		glVertexPointer(3, GL_FLOAT, sizeof(ParticleCacheKey), path->co);
-		glNormalPointer(GL_FLOAT, sizeof(ParticleCacheKey), path->vel);
 
 		if(timed) {
 			for(k=0, pcol=pathcol, pkey=path; k<steps; k++, pkey++, pcol+=4){
@@ -3796,9 +3787,6 @@ static void draw_ptcache_edit(Scene *scene, View3D *v3d, RegionView3D *rv3d, Obj
 
 	/* draw edit vertices */
 	if(pset->selectmode!=SCE_SELECT_PATH){
-		glDisableClientState(GL_NORMAL_ARRAY);
-		glEnableClientState(GL_COLOR_ARRAY);
-		glDisable(GL_LIGHTING);
 		glPointSize(UI_GetThemeValuef(TH_VERTEX_SIZE));
 
 		if(pset->selectmode==SCE_SELECT_POINT){
@@ -3810,7 +3798,7 @@ static void draw_ptcache_edit(Scene *scene, View3D *v3d, RegionView3D *rv3d, Obj
 				if(!(point->flag & PEP_HIDE))
 					totkeys += point->totkey;
 
-			if(!edit->psys)
+			if(!(edit->points->keys->flag & PEK_USE_WCO))
 				pd=pdata=MEM_callocN(totkeys*3*sizeof(float), "particle edit point data");
 			cd=cdata=MEM_callocN(totkeys*(timed?4:3)*sizeof(float), "particle edit color data");
 
@@ -3843,7 +3831,7 @@ static void draw_ptcache_edit(Scene *scene, View3D *v3d, RegionView3D *rv3d, Obj
 				if(point->flag & PEP_HIDE)
 					continue;
 
-				if(edit->psys)
+				if(point->keys->flag & PEK_USE_WCO)
 					glVertexPointer(3, GL_FLOAT, sizeof(PTCacheEditKey), point->keys->world_co);
 				else
 					glVertexPointer(3, GL_FLOAT, 3*sizeof(float), pd);
diff --git a/source/blender/editors/space_view3d/view3d_header.c b/source/blender/editors/space_view3d/view3d_header.c
index 2283d36e018..b6159cf4314 100644
--- a/source/blender/editors/space_view3d/view3d_header.c
+++ b/source/blender/editors/space_view3d/view3d_header.c
@@ -1760,17 +1760,17 @@ static void do_view3d_header_buttons(bContext *C, void *arg, int event)
 
 	case B_SEL_PATH:
 		ts->particle.selectmode= SCE_SELECT_PATH;
-		WM_event_add_notifier(C, NC_OBJECT, ob);
+		WM_event_add_notifier(C, NC_OBJECT|ND_DRAW, ob);
 		ED_undo_push(C, "Selectmode Set: Path");
 		break;
 	case B_SEL_POINT:
 		ts->particle.selectmode = SCE_SELECT_POINT;
-		WM_event_add_notifier(C, NC_OBJECT, ob);
+		WM_event_add_notifier(C, NC_OBJECT|ND_DRAW, ob);
 		ED_undo_push(C, "Selectmode Set: Point");
 		break;
 	case B_SEL_END:
 		ts->particle.selectmode = SCE_SELECT_END;
-		WM_event_add_notifier(C, NC_OBJECT, ob);
+		WM_event_add_notifier(C, NC_OBJECT|ND_DRAW, ob);
 		ED_undo_push(C, "Selectmode Set: End point");
 		break;	
 	
diff --git a/source/blender/editors/transform/transform_conversions.c b/source/blender/editors/transform/transform_conversions.c
index 0fce9592d1d..3f32b707043 100644
--- a/source/blender/editors/transform/transform_conversions.c
+++ b/source/blender/editors/transform/transform_conversions.c
@@ -1690,11 +1690,11 @@ static void createTransParticleVerts(bContext *C, TransInfo *t)
 
 		if(!(point->flag & PEP_TRANSFORM)) continue;
 
-		if(psys)
+		if(psys && !(psys->flag & PSYS_GLOBAL_HAIR))
 			psys_mat_hair_to_global(ob, psmd->dm, psys->part->from, psys->particles + i, mat);
 
 		for(k=0, key=point->keys; k<point->totkey; k++, key++) {
-			if(psys) {
+			if(key->flag & PEK_USE_WCO) {
 				VECCOPY(key->world_co, key->co);
 				Mat4MulVecfl(mat, key->world_co);
 				td->loc = key->world_co;
@@ -1714,7 +1714,7 @@ static void createTransParticleVerts(bContext *C, TransInfo *t)
 			Mat3One(td->smtx);
 
 			/* don't allow moving roots */
-			if(k==0 && pset->flag & PE_LOCK_FIRST)
+			if(k==0 && pset->flag & PE_LOCK_FIRST && (!psys || !(psys->flag & PSYS_GLOBAL_HAIR)))
 				td->protectflag |= OB_LOCK_LOC;
 
 			td->ob = ob;
@@ -1764,7 +1764,7 @@ void flushTransParticles(TransInfo *t)
 	for(i=0, point=edit->points; i<edit->totpoint; i++, point++, td++) {
 		if(!(point->flag & PEP_TRANSFORM)) continue;
 
-		if(psys) {
+		if(psys && !(psys->flag & PSYS_GLOBAL_HAIR)) {
 			psys_mat_hair_to_global(ob, psmd->dm, psys->part->from, psys->particles + i, mat);
 			Mat4Invert(imat,mat);
 
diff --git a/source/blender/makesrna/intern/rna_particle.c b/source/blender/makesrna/intern/rna_particle.c
index 4a23605c717..71b953effdf 100644
--- a/source/blender/makesrna/intern/rna_particle.c
+++ b/source/blender/makesrna/intern/rna_particle.c
@@ -1884,6 +1884,11 @@ static void rna_def_particle_system(BlenderRNA *brna)
 	RNA_def_property_boolean_sdna(prop, NULL, "softflag", OB_SB_ENABLE);
 	RNA_def_property_ui_text(prop, "Use Soft Body", "Enable use of soft body for hair physics simulation.");
 
+	prop= RNA_def_property(srna, "global_hair", PROP_BOOLEAN, PROP_NONE);
+	RNA_def_property_boolean_sdna(prop, NULL, "flag", PSYS_GLOBAL_HAIR);
+	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
+	RNA_def_property_ui_text(prop, "Global Hair", "Hair keys are in global coordinate space");
+
 	/* reactor */
 	prop= RNA_def_property(srna, "reactor_target_object", PROP_POINTER, PROP_NONE);
 	RNA_def_property_pointer_sdna(prop, NULL, "target_ob");
diff --git a/source/blender/makesrna/intern/rna_sculpt_paint.c b/source/blender/makesrna/intern/rna_sculpt_paint.c
index 5575b170398..ab4b27cea7b 100644
--- a/source/blender/makesrna/intern/rna_sculpt_paint.c
+++ b/source/blender/makesrna/intern/rna_sculpt_paint.c
@@ -107,7 +107,7 @@ static void rna_ParticleEdit_redo(bContext *C, PointerRNA *ptr)
 	if(!edit)
 		return;
 
-	psys_free_path_cache(NULL, edit);
+	psys_free_path_cache(edit->psys, edit);
 }
 
 static void rna_ParticleEdit_update(bContext *C, PointerRNA *ptr)
@@ -410,7 +410,7 @@ static void rna_def_particle_edit(BlenderRNA *brna)
 	prop= RNA_def_property(srna, "fade_time", PROP_BOOLEAN, PROP_NONE);
 	RNA_def_property_boolean_sdna(prop, NULL, "flag", PE_FADE_TIME);
 	RNA_def_property_ui_text(prop, "Fade Time", "Fade paths and keys further away from current frame.");
-	RNA_def_property_update(prop, NC_OBJECT, "rna_ParticleEdit_update");
+	RNA_def_property_update(prop, NC_OBJECT|ND_DRAW, "rna_ParticleEdit_update");
 
 	prop= RNA_def_property(srna, "auto_velocity", PROP_BOOLEAN, PROP_NONE);
 	RNA_def_property_boolean_sdna(prop, NULL, "flag", PE_AUTO_VELOCITY);
@@ -443,18 +443,18 @@ static void rna_def_particle_edit(BlenderRNA *brna)
 	prop= RNA_def_property(srna, "draw_step", PROP_INT, PROP_NONE);
 	RNA_def_property_range(prop, 2, 10);
 	RNA_def_property_ui_text(prop, "Steps", "How many steps to draw the path with.");
-	RNA_def_property_update(prop, NC_OBJECT, "rna_ParticleEdit_redo");
+	RNA_def_property_update(prop, NC_OBJECT|ND_DRAW, "rna_ParticleEdit_redo");
 
 	prop= RNA_def_property(srna, "fade_frames", PROP_INT, PROP_NONE);
 	RNA_def_property_range(prop, 2, 100);
 	RNA_def_property_ui_text(prop, "Frames", "How many frames to fade.");
-	RNA_def_property_update(prop, NC_OBJECT, "rna_ParticleEdit_update");
+	RNA_def_property_update(prop, NC_OBJECT|ND_DRAW, "rna_ParticleEdit_update");
 
 	prop= RNA_def_property(srna, "type", PROP_ENUM, PROP_NONE);
 	RNA_def_property_enum_sdna(prop, NULL, "edittype");
 	RNA_def_property_enum_items(prop, edit_type_items);
 	RNA_def_property_ui_text(prop, "Type", "");
-	RNA_def_property_update(prop, NC_OBJECT, "rna_ParticleEdit_redo");
+	RNA_def_property_update(prop, NC_OBJECT|ND_DRAW, "rna_ParticleEdit_redo");
 
 	prop= RNA_def_property(srna, "editable", PROP_BOOLEAN, PROP_NONE);
 	RNA_def_property_boolean_funcs(prop, "rna_ParticleEdit_editable_get", NULL);