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diff --git a/source/blender/blenkernel/BKE_modifier_calc.h b/source/blender/blenkernel/BKE_modifier_calc.h
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+++ b/source/blender/blenkernel/BKE_modifier_calc.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) 2001-2002 by NaN Holding BV.
+ * All rights reserved.
+ *
+ * The Original Code is: all of this file.
+ *
+ * Contributor(s): none yet.
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+
+#ifndef __BKE_MODIFIER_CALC_H__
+#define __BKE_MODIFIER_CALC_H__
+
+/** \file BKE_modifier_calc.h
+ *  \ingroup bke
+ */
+
+#include "DNA_customdata_types.h"
+#include "DNA_meshdata_types.h"
+
+#include "BLI_compiler_attrs.h"
+
+#include "BKE_customdata.h"
+#include "BKE_bvhutils.h"
+
+struct CCGElem;
+struct CCGKey;
+struct MVert;
+struct MEdge;
+struct MFace;
+struct MTFace;
+struct Object;
+struct Scene;
+struct Mesh;
+struct MLoopNorSpaceArray;
+struct BMEditMesh;
+struct KeyBlock;
+struct ModifierData;
+struct MCol;
+struct ColorBand;
+struct GPUVertexAttribs;
+struct GPUDrawObject;
+struct PBVH;
+struct EvaluationContext;
+
+/* Temporary? A function to give a colorband to derivedmesh for vertexcolor ranges */
+void vDM_ColorBand_store(const struct ColorBand *coba, const char alert_color[4]);
+
+/* */
+struct DerivedMesh *mesh_get_derived_final(
+        struct Scene *scene, struct Object *ob,
+        CustomDataMask dataMask);
+struct DerivedMesh *mesh_get_derived_deform(
+        struct Scene *scene, struct Object *ob,
+        CustomDataMask dataMask);
+
+struct DerivedMesh *mesh_create_derived_for_modifier(
+        struct Scene *scene, struct Object *ob,
+        struct ModifierData *md, int build_shapekey_layers);
+
+struct DerivedMesh *mesh_create_derived_render(
+        struct Scene *scene, struct Object *ob,
+        CustomDataMask dataMask);
+
+struct DerivedMesh *getEditDerivedBMesh(
+        struct BMEditMesh *em, struct Object *ob,
+        float (*vertexCos)[3]);
+
+struct DerivedMesh *mesh_create_derived_index_render(
+        struct Scene *scene, struct Object *ob,
+        CustomDataMask dataMask, int index);
+
+/* same as above but wont use render settings */
+struct DerivedMesh *mesh_create_derived(struct Mesh *me, float (*vertCos)[3]);
+struct DerivedMesh *mesh_create_derived_view(
+        struct Scene *scene, struct Object *ob,
+        CustomDataMask dataMask);
+struct DerivedMesh *mesh_create_derived_no_deform(
+        struct Scene *scene, struct Object *ob,
+        float (*vertCos)[3],
+        CustomDataMask dataMask);
+struct DerivedMesh *mesh_create_derived_no_deform_render(
+        struct Scene *scene, struct Object *ob,
+        float (*vertCos)[3],
+        CustomDataMask dataMask);
+/* for gameengine */
+struct DerivedMesh *mesh_create_derived_no_virtual(
+        struct Scene *scene, struct Object *ob, float (*vertCos)[3],
+        CustomDataMask dataMask);
+struct DerivedMesh *mesh_create_derived_physics(
+        struct Scene *scene, struct Object *ob, float (*vertCos)[3],
+        CustomDataMask dataMask);
+
+struct DerivedMesh *editbmesh_get_derived_base(
+        struct Object *, struct BMEditMesh *em);
+struct DerivedMesh *editbmesh_get_derived_cage(
+        struct Scene *scene, struct Object *,
+        struct BMEditMesh *em, CustomDataMask dataMask);
+struct DerivedMesh *editbmesh_get_derived_cage_and_final(
+        struct Scene *scene, struct Object *,
+        struct BMEditMesh *em, CustomDataMask dataMask,
+        struct DerivedMesh **r_final);
+
+struct DerivedMesh *object_get_derived_final(struct Object *ob, const bool for_render);
+
+float (*editbmesh_get_vertex_cos(struct BMEditMesh *em, int *r_numVerts))[3];
+bool editbmesh_modifier_is_enabled(struct Scene *scene, struct ModifierData *md, struct DerivedMesh *dm);
+void makeDerivedMesh(
+        struct Scene *scene, struct Object *ob, struct BMEditMesh *em,
+        CustomDataMask dataMask, const bool build_shapekey_layers);
+
+void BKE_object_eval_mesh(struct EvaluationContext *eval_ctx, struct Scene *scene, struct Object *ob);
+void BKE_object_eval_editmesh(struct EvaluationContext *eval_ctx, struct Scene *scene, struct Object *ob);
+
+void weight_to_rgb(float r_rgb[3], const float weight);
+/** Update the weight MCOL preview layer.
+ * If weights are NULL, use object's active vgroup(s).
+ * Else, weights must be an array of weight float values.
+ *     If indices is NULL, it must be of numVerts length.
+ *     Else, it must be of num length, as indices, which contains vertices' idx to apply weights to.
+ *         (other vertices are assumed zero weight).
+ */
+void DM_update_weight_mcol(
+        struct Object *ob, struct DerivedMesh *dm, int const draw_flag,
+        float *weights, int num, const int *indices);
+
+#endif  /* __BKE_MODIFIER_CALC_H__ */