/*
 * 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.
 */
#ifndef __BKE_SOFTBODY_H__
#define __BKE_SOFTBODY_H__

/** \file
 * \ingroup bke
 */

#ifdef __cplusplus
extern "C" {
#endif

struct Depsgraph;
struct Object;
struct Scene;
struct SoftBody;

typedef struct BodyPoint {
  float origS[3], origE[3], origT[3], pos[3], vec[3], force[3];
  float goal;
  float prevpos[3], prevvec[3], prevdx[3], prevdv[3]; /* used for Heun integration */
  float impdv[3], impdx[3];
  int nofsprings;
  int *springs;
  float choke, choke2, frozen;
  float colball;
  short loc_flag;  // reserved by locale module specific states
  // char octantflag;
  float mass;
  float springweight;
} BodyPoint;

/* allocates and initializes general main data */
extern struct SoftBody *sbNew(struct Scene *scene);

/* frees internal data and softbody itself */
extern void sbFree(struct Object *ob);

/* frees simulation data to reset simulation */
extern void sbFreeSimulation(struct SoftBody *sb);

/* do one simul step, reading and writing vertex locs from given array */
extern void sbObjectStep(struct Depsgraph *depsgraph,
                         struct Scene *scene,
                         struct Object *ob,
                         float framnr,
                         float (*vertexCos)[3],
                         int numVerts);

/* makes totally fresh start situation, resets time */
extern void sbObjectToSoftbody(struct Object *ob);

/* links the softbody module to a 'test for Interrupt' function */
/* pass NULL to unlink again */
extern void sbSetInterruptCallBack(int (*f)(void));

extern void SB_estimate_transform(Object *ob, float lloc[3], float lrot[3][3], float lscale[3][3]);

#ifdef __cplusplus
}
#endif

#endif
