From c8fe3c95a344d401ec3cb3d0be132be00a49a79c Mon Sep 17 00:00:00 2001
From: Daniel Genrich <daniel.genrich@gmx.net>
Date: Sun, 21 Oct 2007 16:39:07 +0000
Subject: [PATCH] Forgot some new file for seperated collisions

---
 source/blender/blenkernel/BKE_collisions.h | 103 +++++++++++++++++++++
 1 file changed, 103 insertions(+)
 create mode 100644 source/blender/blenkernel/BKE_collisions.h

diff --git a/source/blender/blenkernel/BKE_collisions.h b/source/blender/blenkernel/BKE_collisions.h
new file mode 100644
index 00000000000..edd86f0f5f6
--- /dev/null
+++ b/source/blender/blenkernel/BKE_collisions.h
@@ -0,0 +1,103 @@
+/**
+ * BKE_cloth.h
+ *
+ * $Id: BKE_cloth.h,v 1.1 2007/08/01 02:07:27 daniel Exp $
+ *
+ * ***** BEGIN GPL/BL DUAL 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. The Blender
+ * Foundation also sells licenses for use in proprietary software under
+ * the Blender License.  See http://www.blender.org/BL/ for information
+ * about this.
+ *
+ * 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) Blender Foundation.
+ * All rights reserved.
+ *
+ * The Original Code is: all of this file.
+ *
+ * Contributor(s): none yet.
+ *
+ * ***** END GPL/BL DUAL LICENSE BLOCK *****
+ */
+#ifndef BKE_COLLISIONS_H
+#define BKE_COLLISIONS_H
+
+#include <math.h>
+#include <stdlib.h>
+#include <string.h>
+/* types */
+#include "BLI_linklist.h"
+#include "BKE_DerivedMesh.h"
+#include "BKE_object.h"
+#include "BKE_DerivedMesh.h"
+
+// used in kdop.c and collision.c
+typedef struct Tree
+{
+	struct Tree *nodes[4]; // 4 children --> quad-tree
+	struct Tree *parent;
+	struct Tree *nextLeaf;
+	struct Tree *prevLeaf;
+	float	bv[26]; // Bounding volume of all nodes / we have 7 axes on a 14-DOP
+	unsigned int tri_index; // this saves the index of the face
+	int	count_nodes; // how many nodes are used
+	int	traversed;  // how many nodes already traversed until this level?
+	int	isleaf;
+}
+Tree;
+
+typedef struct Tree TreeNode;
+
+typedef struct BVH
+{
+	unsigned int 	numfaces;
+	unsigned int 	numverts;
+	MVert	 	*x; // position of verts at time n 
+	MVert	 	*xold; // position of verts at time n-1
+	MFace 		*mfaces; // just a pointer to the original datastructure
+	struct LinkNode *tree;
+	TreeNode 	*root; // TODO: saving the root --> is this really needed? YES!
+	TreeNode 	*leaf_tree; /* Tail of the leaf linked list.	*/
+	TreeNode 	*leaf_root;	/* Head of the leaf linked list.	*/
+	float 		epsilon; /* epslion is used for inflation of the k-dop	   */
+	int 		flags; /* bvhFlags */
+}
+BVH;
+
+/* used for collisions in kdop.c and also collision.c*/
+typedef struct CollisionPair
+{
+	unsigned int indexA, indexB;
+}
+CollisionPair;
+
+
+/////////////////////////////////////////////////
+// forward declarations
+/////////////////////////////////////////////////
+
+void bvh_free ( BVH *bvh );
+BVH *bvh_build (DerivedMesh *dm, MVert *x, MVert *xold, unsigned int numverts, float epsilon);
+
+int bvh_traverse(Tree *tree1, Tree *tree2, LinkNode *collision_list);
+void bvh_update(DerivedMesh *dm, BVH * bvh, int moving);
+
+LinkNode *BLI_linklist_append_fast ( LinkNode **listp, void *ptr );
+
+
+/////////////////////////////////////////////////
+
+#endif
+