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/**
* blenlib/BKE_effect.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_EFFECT_H
#define BKE_EFFECT_H
#include "DNA_object_types.h"
#include "DNA_modifier_types.h"
struct Object;
struct Scene;
struct Effect;
struct ListBase;
struct Particle;
struct Group;
struct RNG;
struct ParticleSimulationData;
struct ParticleData;
struct ParticleKey;
struct EffectorWeights *BKE_add_effector_weights(struct Group *group);
struct PartDeflect *object_add_collision_fields(int type);
/* Input to effector code */
typedef struct EffectedPoint {
float *loc;
float *vel;
float *ave; /* angular velocity for particles with dynamic rotation */
float *rot; /* rotation quaternion for particles with dynamic rotation */
float vel_to_frame;
float vel_to_sec;
/* only for particles */
float size, charge;
unsigned int flag;
int index;
struct ParticleSystem *psys; /* particle system the point belongs to */
} EffectedPoint;
typedef struct GuideEffectorData {
float vec_to_point[3];
float strength;
} GuideEffectorData;
typedef struct EffectorData {
/* Effector point */
float loc[3];
float nor[3];
float vel[3];
float vec_to_point[3];
float distance, falloff;
/* only for effector particles */
float size, charge;
/* only for vortex effector with surface falloff */
float nor2[3], vec_to_point2[3];
int *index; /* point index */
} EffectorData;
/* used for calculating the effector force */
typedef struct EffectorCache {
struct EffectorCache *next, *prev;
struct Scene *scene;
struct Object *ob;
struct ParticleSystem *psys;
struct SurfaceModifierData *surmd;
struct PartDeflect *pd;
/* precalculated for guides */
struct GuideEffectorData *guide_data;
float guide_loc[4], guide_dir[3], guide_radius;
float frame;
int flag;
} EffectorCache;
void free_effect(struct Effect *eff);
void free_effects(struct ListBase *lb);
struct Effect *copy_effect(struct Effect *eff);
void copy_effects(struct ListBase *lbn, struct ListBase *lb);
void deselectall_eff(struct Object *ob);
struct PartEff *give_parteff(struct Object *ob);
void free_partdeflect(struct PartDeflect *pd);
struct ListBase *pdInitEffectors(struct Scene *scene, struct Object *ob_src, struct ParticleSystem *psys_src, struct EffectorWeights *weights);
void pdEndEffectors(struct ListBase **effectors);
void pdDoEffectors(struct ListBase *effectors, struct ListBase *colliders, struct EffectorWeights *weights, struct EffectedPoint *point, float *force, float *impulse);
void pd_point_from_particle(struct ParticleSimulationData *sim, struct ParticleData *pa, struct ParticleKey *state, struct EffectedPoint *point);
void pd_point_from_loc(struct Scene *scene, float *loc, float *vel, int index, struct EffectedPoint *point);
void pd_point_from_soft(struct Scene *scene, float *loc, float *vel, int index, struct EffectedPoint *point);
/* needed for boids */
float effector_falloff(struct EffectorCache *eff, struct EffectorData *efd, struct EffectedPoint *point, struct EffectorWeights *weights);
int closest_point_on_surface(struct SurfaceModifierData *surmd, float *co, float *surface_co, float *surface_nor, float *surface_vel);
int get_effector_data(struct EffectorCache *eff, struct EffectorData *efd, struct EffectedPoint *point, int real_velocity);
/* required for particle_system.c */
//void do_physical_effector(struct EffectorData *eff, struct EffectorPoint *point, float *total_force);
//float effector_falloff(struct EffectorData *eff, struct EffectorPoint *point, struct EffectorWeights *weights);
/* EffectedPoint->flag */
#define PE_WIND_AS_SPEED 1
#define PE_DYNAMIC_ROTATION 2
#define PE_USE_NORMAL_DATA 4
/* EffectorData->flag */
#define PE_VELOCITY_TO_IMPULSE 1
#endif
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