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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright Blender Foundation. All rights reserved. */
#pragma once
/** \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(void);
/**
* Frees internal data and soft-body itself.
*/
extern void sbFree(struct Object *ob);
/**
* Frees simulation data to reset simulation.
*/
extern void sbFreeSimulation(struct SoftBody *sb);
/**
* Do one simulation step, reading and writing vertex locs from given array.
* */
extern void sbObjectStep(struct Depsgraph *depsgraph,
struct Scene *scene,
struct Object *ob,
float cfra,
float (*vertexCos)[3],
int numVerts);
/**
* Makes totally fresh start situation, resets time.
*/
extern void sbObjectToSoftbody(struct Object *ob);
/**
* Soft-body global visible functions.
* Links the soft-body module to a 'test for Interrupt' function, pass NULL to clear the callback.
*/
extern void sbSetInterruptCallBack(int (*f)(void));
/**
* A precise position vector denoting the motion of the center of mass give a rotation/scale matrix
* using averaging method, that's why estimate and not calculate see: this is kind of reverse
* engineering: having to states of a point cloud and recover what happened our advantage here we
* know the identity of the vertex there are others methods giving other results.
*
* \param ob: Any object that can do soft-body e.g. mesh, lattice, curve.
* \param lloc: Output of the calculated location (or NULL).
* \param lrot: Output of the calculated rotation (or NULL).
* \param lscale: Output for the calculated scale (or NULL).
*
* For velocity & 2nd order stuff see: #vcloud_estimate_transform_v3.
*/
extern void SB_estimate_transform(Object *ob, float lloc[3], float lrot[3][3], float lscale[3][3]);
#ifdef __cplusplus
}
#endif
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