/* SPDX-License-Identifier: GPL-2.0-or-later
 * Copyright 2004-2005 Blender Foundation. All rights reserved. */

/** \file
 * \ingroup DNA
 */

#pragma once

#include "DNA_defs.h"
#include "DNA_listBase.h"

#ifdef __cplusplus
extern "C" {
#endif

struct BodySpring;

/** #PartDeflect.forcefield: Effector Fields types. */
typedef enum ePFieldType {
  /** (this is used for general effector weight). */
  PFIELD_NULL = 0,
  /** Force away/towards a point depending on force strength. */
  PFIELD_FORCE = 1,
  /** Force around the effector normal. */
  PFIELD_VORTEX = 2,
  /** Force from the cross product of effector normal and point velocity. */
  PFIELD_MAGNET = 3,
  /** Force away and towards a point depending which side of the effector normal the point is. */
  PFIELD_WIND = 4,
  /** Force along curve for dynamics, a shaping curve for hair paths. */
  PFIELD_GUIDE = 5,
  /** Force based on texture values calculated at point coordinates. */
  PFIELD_TEXTURE = 6,
  /** Force of a harmonic (damped) oscillator. */
  PFIELD_HARMONIC = 7,
  /** Force away/towards a point depending on point charge. */
  PFIELD_CHARGE = 8,
  /** Force due to a Lennard-Jones potential. */
  PFIELD_LENNARDJ = 9,
  /** Defines predator / goal for boids. */
  PFIELD_BOID = 10,
  /** Force defined by BLI_noise_generic_turbulence. */
  PFIELD_TURBULENCE = 11,
  /** Linear & quadratic drag. */
  PFIELD_DRAG = 12,
  /** Force based on fluid simulation velocities. */
  PFIELD_FLUIDFLOW = 13,

  /* Keep last. */
  NUM_PFIELD_TYPES,
} ePFieldType;

typedef struct PartDeflect {
  /** General settings flag. */
  int flag;
  /** Deflection flag - does mesh deflect particles. */
  short deflect;
  /** Force field type, do the vertices attract / repel particles? */
  short forcefield;
  /** Fall-off type. */
  short falloff;
  /** Point, plane or surface. */
  short shape;
  /** Texture effector. */
  short tex_mode;
  /** For curve guide. */
  short kink, kink_axis;
  short zdir;

  /* Main effector values */
  /** The strength of the force (+ or - ). */
  float f_strength;
  /** Damping ratio of the harmonic effector. */
  float f_damp;
  /**
   * How much force is converted into "air flow", i.e.
   * force used as the velocity of surrounding medium. */
  float f_flow;
  /** How much force is reduced when acting parallel to a surface, e.g. cloth. */
  float f_wind_factor;

  char _pad0[4];

  /** Noise size for noise effector, restlength for harmonic effector. */
  float f_size;

  /* fall-off */
  /** The power law - real gravitation is 2 (square). */
  float f_power;
  /** If indicated, use this maximum. */
  float maxdist;
  /** If indicated, use this minimum. */
  float mindist;
  /** Radial fall-off power. */
  float f_power_r;
  /** Radial versions of above. */
  float maxrad;
  float minrad;

  /* particle collisions */
  /** Damping factor for particle deflection. */
  float pdef_damp;
  /** Random element of damping for deflection. */
  float pdef_rdamp;
  /** Chance of particle passing through mesh. */
  float pdef_perm;
  /** Friction factor for particle deflection. */
  float pdef_frict;
  /** Random element of friction for deflection. */
  float pdef_rfrict;
  /** Surface particle stickiness. */
  float pdef_stickness;

  /** Used for forces. */
  float absorption;

  /* softbody collisions */
  /** Damping factor for softbody deflection. */
  float pdef_sbdamp;
  /** Inner face thickness for softbody deflection. */
  float pdef_sbift;
  /** Outer face thickness for softbody deflection. */
  float pdef_sboft;

  /* guide curve, same as for particle child effects */
  float clump_fac, clump_pow;
  float kink_freq, kink_shape, kink_amp, free_end;

  /* texture effector */
  /** Used for calculating partial derivatives. */
  float tex_nabla;
  /** Texture of the texture effector. */
  struct Tex *tex;

  /* effector noise */
  /** Random noise generator for e.g. wind. */
  struct RNG *rng;
  /** Noise of force. */
  float f_noise;
  /** Noise random seed. */
  int seed;

  /* Display Size */
  /** Runtime only : start of the curve or draw scale. */
  float drawvec1[4];
  /** Runtime only : end of the curve. */
  float drawvec2[4];
  /** Runtime only. */
  float drawvec_falloff_min[3];
  char _pad1[4];
  /** Runtime only. */
  float drawvec_falloff_max[3];
  char _pad2[4];

  /** Force source object. */
  struct Object *f_source;

  /** Friction of cloth collisions. */
  float pdef_cfrict;
  char _pad[4];
} PartDeflect;

typedef struct EffectorWeights {
  /** Only use effectors from this group of objects. */
  struct Collection *group;

  /** Effector type specific weights. */
  float weight[14];
  float global_gravity;
  short flag;
  char _pad[2];
} EffectorWeights;

/* EffectorWeights->flag */
#define EFF_WEIGHT_DO_HAIR 1

typedef struct SBVertex {
  float vec[4];
} SBVertex;

/* Container for data that is shared among CoW copies.
 *
 * This is placed in a separate struct so that values can be changed
 * without having to update all CoW copies. */
typedef struct SoftBody_Shared {
  struct PointCache *pointcache;
  struct ListBase ptcaches;
} SoftBody_Shared;

typedef struct SoftBody{
  int totpoint, totedge, tottet, tot_surface_point, tot_surface_tet;
  char _pad1[4];
  /** Not saved in file. */
  struct BodyPoint *bpoint;
  struct BodyEdge *bedge;
  struct BodyTet *btet;

  int *surface_points;
  int *surface_tets;

  float grav;
  float substep_count;
  float alpha_vol; //stiffness coefficient
  float alpha_edge;
  float dt;
  
  int last_frame;

  short vertgroup;
  char _pad[6];

  struct SoftBody_Shared *shared;

  // char _pad[4];
} SoftBody;


// typedef struct SoftBody {
//   /* dynamic data */
//   int totpoint, tottet;
//   /** Not saved in file. */
//   struct BodyPoint *bpoint;
//   /** Not saved in file. */
//   struct BodyTet *btet;
//   char _pad;
//   char msg_lock;
//   short msg_value;

//   /* part of UI: */

//   /* general options */
//   /** Softbody mass of *vertex*. */
//   float nodemass;
//   /**
//    * Along with it introduce mass painting
//    * starting to fix old bug .. nastiness that VG are indexes
//    * rather find them by name tag to find it -> jow20090613.
//    * MAX_VGROUP_NAME */
//   char namedVG_Mass[64];
//   /** Softbody amount of gravitation to apply. */
//   float grav;
//   /** Friction to env. */
//   float mediafrict;
//   /** Error limit for ODE solver. */
//   float rklimit;
//   /** User control over simulation speed. */
//   float physics_speed;

//   /* goal */
//   /** Softbody goal springs. */
//   float goalspring;
//   /** Softbody goal springs friction. */
//   float goalfrict;
//   /** Quick limits for goal. */
//   float mingoal;
//   float maxgoal;
//   /** Default goal for vertices without vgroup. */
//   float defgoal;
//   /** Index starting at 1. */
//   short vertgroup;
//   /**
//    * Starting to fix old bug .. nastiness that VG are indexes
//    * rather find them by name tag to find it -> jow20090613.
//    * MAX_VGROUP_NAME */
//   char namedVG_Softgoal[64];

//   short fuzzyness;

//   /* springs */
//   /** Softbody inner springs. */
//   float inspring;
//   /** Softbody inner springs friction. */
//   float infrict;
//   /**
//    * Along with it introduce Spring_K painting
//    * starting to fix old bug .. nastiness that VG are indexes
//    * rather find them by name tag to find it -> jow20090613.
//    * MAX_VGROUP_NAME
//    */
//   char namedVG_Spring_K[64];

//   /* baking */
//   char _pad1[6];
//   /** Local==1: use local coords for baking. */
//   char local, solverflags;

//   /* -- these must be kept for backwards compatibility -- */
//   /** Array of size totpointkey. */
//   SBVertex **keys;
//   /** If totpointkey != totpoint or totkey!- (efra-sfra)/interval -> free keys. */
//   int totpointkey, totkey;
//   /* ---------------------------------------------------- */
//   float secondspring;

//   /* Self collision. */
//   /** Fixed collision ball size if > 0. */
//   float colball;
//   /** Cooling down collision response. */
//   float balldamp;
//   /** Pressure the ball is loaded with. */
//   float ballstiff;
//   short sbc_mode;
//   short aeroedge;
//   short minloops;
//   short maxloops;
//   short choke;
//   short solver_ID;
//   short plastic;
//   short springpreload;

//   /** Scratchpad/cache on live time not saved in file. */
//   struct SBScratch *scratch;
//   float shearstiff;
//   float inpush;

//   struct SoftBody_Shared *shared;
//   /** Moved to SoftBody_Shared. */
//   struct PointCache *pointcache DNA_DEPRECATED;
//   /** Moved to SoftBody_Shared. */
//   struct ListBase ptcaches DNA_DEPRECATED;

//   struct Collection *collision_group;

//   struct EffectorWeights *effector_weights;
//   /* Reverse estimated object-matrix (run-time data, no need to store in the file). */
//   float lcom[3];
//   float lrot[3][3];
//   float lscale[3][3];

//   int last_frame;
// } SoftBody;

/* pd->flag: various settings */
#define PFIELD_USEMAX (1 << 0)
// #define PDEFLE_DEFORM         (1 << 1) /* UNUSED */
/** TODO: do_versions for below */
#define PFIELD_GUIDE_PATH_ADD (1 << 2)
/** used for do_versions */
#define PFIELD_PLANAR (1 << 3)
#define PDEFLE_KILL_PART (1 << 4)
/** used for do_versions */
#define PFIELD_POSZ (1 << 5)
#define PFIELD_TEX_OBJECT (1 << 6)
/** used for turbulence */
#define PFIELD_GLOBAL_CO (1 << 6)
#define PFIELD_TEX_2D (1 << 7)
/** used for harmonic force */
#define PFIELD_MULTIPLE_SPRINGS (1 << 7)
#define PFIELD_USEMIN (1 << 8)
#define PFIELD_USEMAXR (1 << 9)
#define PFIELD_USEMINR (1 << 10)
#define PFIELD_TEX_ROOTCO (1 << 11)
/** used for do_versions */
#define PFIELD_SURFACE (1 << 12)
#define PFIELD_VISIBILITY (1 << 13)
#define PFIELD_DO_LOCATION (1 << 14)
#define PFIELD_DO_ROTATION (1 << 15)
/** apply curve weights */
#define PFIELD_GUIDE_PATH_WEIGHT (1 << 16)
/** multiply smoke force by density */
#define PFIELD_SMOKE_DENSITY (1 << 17)
/** used for (simple) force */
#define PFIELD_GRAVITATION (1 << 18)
/** Enable cloth collision side detection based on normal. */
#define PFIELD_CLOTH_USE_CULLING (1 << 19)
/** Replace collision direction with collider normal. */
#define PFIELD_CLOTH_USE_NORMAL (1 << 20)

/* pd->falloff */
#define PFIELD_FALL_SPHERE 0
#define PFIELD_FALL_TUBE 1
#define PFIELD_FALL_CONE 2

/* pd->shape */
#define PFIELD_SHAPE_POINT 0
#define PFIELD_SHAPE_PLANE 1
#define PFIELD_SHAPE_SURFACE 2
#define PFIELD_SHAPE_POINTS 3
#define PFIELD_SHAPE_LINE 4

/* pd->tex_mode */
#define PFIELD_TEX_RGB 0
#define PFIELD_TEX_GRAD 1
#define PFIELD_TEX_CURL 2

/* pd->zdir */
#define PFIELD_Z_BOTH 0
#define PFIELD_Z_POS 1
#define PFIELD_Z_NEG 2

/* ob->softflag */
#define OB_SB_ENABLE 1 /* deprecated, use modifier */
#define OB_SB_GOAL 2
#define OB_SB_EDGES 4
#define OB_SB_QUADS 8
#define OB_SB_POSTDEF 16
// #define OB_SB_REDO       32
// #define OB_SB_BAKESET    64
// #define OB_SB_BAKEDO 128
// #define OB_SB_RESET      256
#define OB_SB_SELF 512
#define OB_SB_FACECOLL 1024
#define OB_SB_EDGECOLL 2048
/* #define OB_SB_COLLFINAL 4096 */ /* deprecated */
/* #define OB_SB_BIG_UI 8192 */    /* deprecated */
#define OB_SB_AERO_ANGLE 16384

/* sb->solverflags */
#define SBSO_MONITOR 1
#define SBSO_OLDERR 2
#define SBSO_ESTIMATEIPO 4

/* sb->sbc_mode */
#define SBC_MODE_MANUAL 0
#define SBC_MODE_AVG 1
#define SBC_MODE_MIN 2
#define SBC_MODE_MAX 3
#define SBC_MODE_AVGMINMAX 4

#ifdef __cplusplus
}
#endif