/**
 * blenlib/BKE_armature.h (mar-2001 nzc)
 *	
 * $Id$ 
 *
 * ***** 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., 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_ARMATURE_H
#define BKE_ARMATURE_H

struct Bone;
struct Main;
struct bArmature;
struct bPose;
struct bPoseChannel;
struct bConstraint;
struct Scene;
struct Object;
struct MDeformVert;
struct Mesh;
struct PoseTree;
struct ListBase;

typedef struct PoseTarget
{
	struct PoseTarget *next, *prev;

	struct bConstraint *con;		/* the constrait of this target */
	int tip;						/* index of tip pchan in PoseTree */
} PoseTarget;

typedef struct PoseTree
{
	struct PoseTree *next, *prev;
	
	int 	type;					/* type of IK that this serves (CONSTRAINT_TYPE_KINEMATIC or ..._SPLINEIK) */
	int		totchannel;				/* number of pose channels */
	
	struct ListBase targets;		/* list of targets of the tree */
	struct bPoseChannel	**pchan;	/* array of pose channels */
	int		*parent;				/* and their parents */
	
	float	(*basis_change)[3][3]; 	/* basis change result from solver */
	int		iterations;				/* iterations from the constraint */
	int     stretch;				/* disable stretching */
} PoseTree;

/*	Core armature functionality */
#ifdef __cplusplus
extern "C" {
#endif

struct bArmature *add_armature(char *name);
struct bArmature *get_armature(struct Object *ob);
void free_bonelist (struct ListBase *lb);
void free_armature(struct bArmature *arm);
void make_local_armature(struct bArmature *arm);
struct bArmature *copy_armature(struct bArmature *arm);

void bone_flip_name (char *name, int strip_number);
void bone_autoside_name (char *name, int strip_number, short axis, float head, float tail);

struct Bone *get_named_bone (struct bArmature *arm, const char *name);

float distfactor_to_bone (float vec[3], float b1[3], float b2[3], float rad1, float rad2, float rdist);

void where_is_armature (struct bArmature *arm);
void where_is_armature_bone(struct Bone *bone, struct Bone *prevbone);
void armature_rebuild_pose(struct Object *ob, struct bArmature *arm);
void where_is_pose (struct Scene *scene, struct Object *ob);
void where_is_pose_bone(struct Scene *scene, struct Object *ob, struct bPoseChannel *pchan, float ctime, int do_extra);

/* get_objectspace_bone_matrix has to be removed still */
void get_objectspace_bone_matrix (struct Bone* bone, float M_accumulatedMatrix[][4], int root, int posed);
void vec_roll_to_mat3(float *vec, float roll, float mat[][3]);
void mat3_to_vec_roll(float mat[][3], float *vec, float *roll);

/* Common Conversions Between Co-ordinate Spaces */
void armature_mat_world_to_pose(struct Object *ob, float inmat[][4], float outmat[][4]);
void armature_loc_world_to_pose(struct Object *ob, float *inloc, float *outloc);
void armature_mat_pose_to_bone(struct bPoseChannel *pchan, float inmat[][4], float outmat[][4]);
void armature_loc_pose_to_bone(struct bPoseChannel *pchan, float *inloc, float *outloc);
void armature_mat_pose_to_delta(float delta_mat[][4], float pose_mat[][4], float arm_mat[][4]);

void pchan_apply_mat4(struct bPoseChannel *pchan, float mat[][4]);
void pchan_to_mat4(struct bPoseChannel *pchan, float chan_mat[4][4]);

/* Rotation Mode Conversions - Used for PoseChannels + Objects... */
void BKE_rotMode_change_values(float quat[4], float eul[3], float axis[3], float *angle, short oldMode, short newMode);

/* B-Bone support */
typedef struct Mat4 {
	float mat[4][4];
} Mat4;

Mat4 *b_bone_spline_setup(struct bPoseChannel *pchan, int rest);

#ifdef __cplusplus
}
#endif

#endif