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/*
* 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.
*/
/** \file
* \ingroup DNA
*/
#pragma once
#include "DNA_listBase.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* Point cache file data types:
* - Used as `(1 << flag)` so poke jahka if you reach the limit of 15.
* - To add new data types update:
* - #BKE_ptcache_data_size()
* - #ptcache_file_pointers_init()
*/
#define BPHYS_DATA_INDEX 0
#define BPHYS_DATA_LOCATION 1
#define BPHYS_DATA_SMOKE_LOW 1
#define BPHYS_DATA_VELOCITY 2
#define BPHYS_DATA_SMOKE_HIGH 2
#define BPHYS_DATA_ROTATION 3
#define BPHYS_DATA_DYNAMICPAINT 3
#define BPHYS_DATA_AVELOCITY 4 /* used for particles */
#define BPHYS_DATA_XCONST 4 /* used for cloth */
#define BPHYS_DATA_SIZE 5
#define BPHYS_DATA_TIMES 6
#define BPHYS_DATA_BOIDS 7
#define BPHYS_TOT_DATA 8
#define BPHYS_EXTRA_FLUID_SPRINGS 1
#define BPHYS_EXTRA_CLOTH_ACCELERATION 2
typedef struct PTCacheExtra {
struct PTCacheExtra *next, *prev;
unsigned int type, totdata;
void *data;
} PTCacheExtra;
typedef struct PTCacheMem {
struct PTCacheMem *next, *prev;
unsigned int frame, totpoint;
unsigned int data_types, flag;
/** BPHYS_TOT_DATA. */
void *data[8];
struct ListBase extradata;
} PTCacheMem;
typedef struct PointCache {
struct PointCache *next, *prev;
/** Generic flag. */
int flag;
/**
* The number of frames between cached frames.
* This should probably be an upper bound for a per point adaptive step in the future,
* but for now it's the same for all points. Without adaptivity this can effect the perceived
* simulation quite a bit though. If for example particles are colliding with a horizontal
* plane (with high damping) they quickly come to a stop on the plane, however there are still
* forces acting on the particle (gravity and collisions), so the particle velocity isn't
* necessarily zero for the whole duration of the frame even if the particle seems stationary.
* If all simulation frames aren't cached (step > 1) these velocities are interpolated into
* movement for the non-cached frames.
* The result will look like the point is oscillating around the collision location.
* So for now cache step should be set to 1 for accurate reproduction of collisions.
*/
int step;
/** Current frame of simulation (only if SIMULATION_VALID). */
int simframe;
/** Simulation start frame. */
int startframe;
/** Simulation end frame. */
int endframe;
/** Frame being edited (runtime only). */
int editframe;
/** Last exact frame that's cached. */
int last_exact;
/** Used for editing cache - what is the last baked frame. */
int last_valid;
char _pad[4];
/* for external cache files */
/** Number of cached points. */
int totpoint;
/** Modifier stack index. */
int index;
short compression;
char _pad0[2];
char name[64];
char prev_name[64];
char info[128];
/** File path, 1024 = FILE_MAX. */
char path[1024];
/**
* Array of length `endframe - startframe + 1` with flags to indicate cached frames.
* Can be later used for other per frame flags too if needed.
*/
char *cached_frames;
int cached_frames_len;
char _pad1[4];
struct ListBase mem_cache;
struct PTCacheEdit *edit;
/** Free callback. */
void (*free_edit)(struct PTCacheEdit *edit);
} PointCache;
/* pointcache->flag */
#define PTCACHE_BAKED (1 << 0)
#define PTCACHE_OUTDATED (1 << 1)
#define PTCACHE_SIMULATION_VALID (1 << 2)
#define PTCACHE_BAKING (1 << 3)
//#define PTCACHE_BAKE_EDIT (1 << 4)
//#define PTCACHE_BAKE_EDIT_ACTIVE (1 << 5)
#define PTCACHE_DISK_CACHE (1 << 6)
///* removed since 2.64 - T30974, could be added back in a more useful way */
//#define PTCACHE_QUICK_CACHE (1 << 7)
#define PTCACHE_FRAMES_SKIPPED (1 << 8)
#define PTCACHE_EXTERNAL (1 << 9)
#define PTCACHE_READ_INFO (1 << 10)
/** don't use the filename of the blendfile the data is linked from (write a local cache) */
#define PTCACHE_IGNORE_LIBPATH (1 << 11)
/**
* High resolution cache is saved for smoke for backwards compatibility,
* so set this flag to know it's a "fake" cache.
*/
#define PTCACHE_FAKE_SMOKE (1 << 12)
#define PTCACHE_IGNORE_CLEAR (1 << 13)
#define PTCACHE_FLAG_INFO_DIRTY (1 << 14)
/* PTCACHE_OUTDATED + PTCACHE_FRAMES_SKIPPED */
#define PTCACHE_REDO_NEEDED 258
#define PTCACHE_COMPRESS_NO 0
#define PTCACHE_COMPRESS_LZO 1
#define PTCACHE_COMPRESS_LZMA 2
#ifdef __cplusplus
}
#endif
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