Integration of the Google Summer of Code Modifier Stack Upgrade project. The

main features are:
* Modifiers can now be in any order in the modifier stack
* DerivedMesh now has a standard framework for custom element data to be passed
  through the stack with mesh data (being copied and interpolated as
  appropriate), so modifiers can access whatever data they need
* The modifier stack code has been refactored and a number of bugs have been
  removed
* The EdgeSplit modifier has been added:
  http://mediawiki.blender.org/index.php/BlenderDev/EdgeSplitModifier
* The DerivedMesh modifier has been added:
  http://mediawiki.blender.org/index.php/BlenderDev/DisplaceModifier
* The UVProject modifier has been added:
  http://mediawiki.blender.org/index.php/BlenderDev/UVProjectModifier

For more info, see:
http://mediawiki.blender.org/index.php/User:Artificer/ModifierStackUpgrade
(currently undergoing reorganisation)

1 files changed, 102 insertions, 0 deletions

diff --git a/source/blender/blenkernel/BKE_cdderivedmesh.h b/source/blender/blenkernel/BKE_cdderivedmesh.h
new file mode 100644
index 00000000000..b8313440551
--- /dev/null
+++ b/source/blender/blenkernel/BKE_cdderivedmesh.h
@@ -0,0 +1,102 @@
+/*
+* $Id$
+*
+* ***** 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+*
+* The Original Code is Copyright (C) 2006 Blender Foundation.
+* All rights reserved.
+*
+* The Original Code is: all of this file.
+*
+* Contributor(s): Ben Batt <benbatt@gmail.com>
+*
+* ***** END GPL LICENSE BLOCK *****
+*/ 
+
+/* CDDerivedMesh interface.
+ * CDDerivedMesh (CD = Custom Data) is a DerivedMesh backend which stores
+ * mesh elements (vertices, edges and faces) as layers of custom element data.
+ */
+
+#ifndef BKE_CDDERIVEDMESH_H
+#define BKE_CDDERIVEDMESH_H
+
+#include "BKE_DerivedMesh.h"
+
+struct DerivedMesh;
+struct EditMesh;
+struct Mesh;
+
+/* creates a new CDDerivedMesh */
+struct DerivedMesh *CDDM_new(int numVerts, int numEdges, int numFaces);
+
+/* creates a CDDerivedMesh from the given Mesh */
+struct DerivedMesh *CDDM_from_mesh(struct Mesh *mesh);
+
+/* creates a CDDerivedMesh from the given EditMesh */
+struct DerivedMesh *CDDM_from_editmesh(struct EditMesh *em, struct Mesh *me);
+
+/* Copies the given DerivedMesh with verts, faces & edges stored as
+ * custom element data.
+ */
+struct DerivedMesh *CDDM_copy(struct DerivedMesh *dm);
+
+/* creates a CDDerivedMesh with the same layer stack configuration as the
+ * given DerivedMesh and containing the requested numbers of elements.
+ * elements are initialised to all zeros
+ */
+struct DerivedMesh *CDDM_from_template(struct DerivedMesh *source,
+                                  int numVerts, int numEdges, int numFaces);
+
+/* applies vertex coordinates to a CDDerivedMesh
+ */
+void CDDM_apply_vert_coords(struct DerivedMesh *cddm, float (*vertCoords)[3]);
+
+/* recalculates normals for a CDDerivedMesh
+ */
+void CDDM_calc_normals(struct DerivedMesh *dm);
+
+/* calculates edges for a CDDerivedMesh (from face data)
+ * this completely replaces the current edge data in the DerivedMesh
+ */
+void CDDM_calc_edges(struct DerivedMesh *dm);
+
+/* sets the number of vertices/edges/faces in a CDDerivedMesh
+ * if the value given is more than the maximum, the maximum is used
+ */
+void CDDM_set_num_verts(struct DerivedMesh *dm, int numVerts);
+void CDDM_set_num_edges(struct DerivedMesh *dm, int numEdges);
+void CDDM_set_num_faces(struct DerivedMesh *dm, int numFaces);
+
+/* vertex/edge/face access functions
+ * should always succeed if index is within bounds
+ * note these return pointers - any change modifies the internals of the mesh
+ */
+struct MVert *CDDM_get_vert(struct DerivedMesh *dm, int index);
+struct MEdge *CDDM_get_edge(struct DerivedMesh *dm, int index);
+struct MFace *CDDM_get_face(struct DerivedMesh *dm, int index);
+
+/* vertex/edge/face array access functions - return the array holding the
+ * desired data
+ * should always succeed
+ * note these return pointers - any change modifies the internals of the mesh
+ */
+struct MVert *CDDM_get_verts(struct DerivedMesh *dm);
+struct MEdge *CDDM_get_edges(struct DerivedMesh *dm);
+struct MFace *CDDM_get_faces(struct DerivedMesh *dm);
+#endif
+