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diff --git a/source/blender/blenkernel/BKE_editstrands.h b/source/blender/blenkernel/BKE_editstrands.h
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+/*
+ * ***** BEGIN GPL LICENSE BLOCK *****
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * The Original Code is Copyright (C) Blender Foundation
+ * All rights reserved.
+ *
+ * The Original Code is: all of this file.
+ *
+ * Contributor(s): Lukas Toenne
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+
+#ifndef __BKE_EDITSTRANDS_H__
+#define __BKE_EDITSTRANDS_H__
+
+/** \file blender/blenkernel/BKE_editstrands.h
+ *  \ingroup bke
+ */
+
+#include "BLI_utildefines.h"
+
+#include "DNA_customdata_types.h"
+
+#include "BKE_customdata.h"
+#include "bmesh.h"
+
+struct BMesh;
+struct DerivedMesh;
+struct Key;
+struct Object;
+struct Strands;
+
+typedef struct BMEditStrands {
+	struct BMesh *bm;
+	
+	/*this is for undoing failed operations*/
+	struct BMEditStrands *emcopy;
+	int emcopyusers;
+	
+	/* Object this editmesh came from (if it came from one) */
+	struct Object *ob;
+	struct DerivedMesh *root_dm;
+	
+	int flag;
+	
+	unsigned int vertex_glbuf;
+	unsigned int elem_glbuf;
+	unsigned int dot_glbuf;
+	
+	/*temp variables for x-mirror editing*/
+	int mirror_cdlayer; /* -1 is invalid */
+} BMEditStrands;
+
+/* BMEditStrands->flag */
+typedef enum BMEditStrandsFlag {
+	BM_STRANDS_DIRTY_SEGLEN     = 1,
+} BMEditStrandsFlag;
+
+struct BMEditStrands *BKE_editstrands_create(struct BMesh *bm, struct DerivedMesh *root_dm, float mat[4][4]);
+struct BMEditStrands *BKE_editstrands_copy(struct BMEditStrands *es);
+struct BMEditStrands *BKE_editstrands_from_object(struct Object *ob);
+void BKE_editstrands_update_linked_customdata(struct BMEditStrands *es);
+void BKE_editstrands_free(struct BMEditStrands *es);
+
+/* === constraints === */
+
+/* Stores vertex locations for temporary reference:
+ * Vertex locations get modified by tools, but then need to be corrected
+ * by calculating a smooth solution based on the difference to original pre-tool locations.
+ */
+typedef float (*BMEditStrandsLocations)[3];
+BMEditStrandsLocations BKE_editstrands_get_locations(struct BMEditStrands *edit);
+void BKE_editstrands_free_locations(BMEditStrandsLocations locs);
+
+void BKE_editstrands_solve_constraints(struct Object *ob, struct BMEditStrands *es, BMEditStrandsLocations orig);
+void BKE_editstrands_ensure(struct BMEditStrands *es);
+
+
+/* === cache shape key conversion === */
+
+struct BMesh *BKE_cache_strands_to_bmesh(struct Strands *strands, struct Key *key, float mat[4][4], int act_key_nr, struct DerivedMesh *dm);
+struct Strands *BKE_cache_strands_from_bmesh(struct BMEditStrands *edit, struct Key *key, float mat[4][4], struct DerivedMesh *dm);
+
+/* === particle conversion === */
+
+struct BMesh *BKE_particles_to_bmesh(struct Object *ob, struct ParticleSystem *psys);
+void BKE_particles_from_bmesh(struct Object *ob, struct ParticleSystem *psys);
+
+#endif