/*
 * 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) 2004-2005 by Blender Foundation
 * All rights reserved.
 */

/** \file
 * \ingroup DNA
 */

#pragma once

#include "DNA_ID.h"
#include "DNA_defs.h"

#ifdef __cplusplus
extern "C" {
#endif

struct Ipo;

typedef struct FluidVertexVelocity {
  float vel[3];
} FluidVertexVelocity;

typedef struct FluidsimSettings {
  /** For fast RNA access. */
  struct FluidsimModifierData *fmd;
  /* threadcont the calculation is done with */
  int threads;
  char _pad1[4];
  /* domain, fluid or obstacle */
  short type;
  /* Display advanced options in fluid sim tab (on=1, off=0). */
  short show_advancedoptions;

  /* domain object settings */
  /* resolutions */
  short resolutionxyz;
  short previewresxyz;
  /* size of the domain in real units (meters along largest resolution x, y, z extent) */
  float realsize;
  /* show original meshes, preview or final sim */
  short guiDisplayMode;
  short renderDisplayMode;

  /* fluid properties */
  float viscosityValue;
  short viscosityMode DNA_DEPRECATED;
  short viscosityExponent;
  /* gravity strength */
  float grav[3];
  /* anim start end time (in seconds) */
  float animStart, animEnd;
  /* bake start end time (in blender frames) */
  int bakeStart, bakeEnd;
  /* offset for baked frames */
  int frameOffset;
  char _pad2[4];
  /* g star param (LBM compressibility) */
  float gstar;
  /* activate refinement? */
  int maxRefine;

  /* fluid object type settings */
  /* gravity strength */
  float iniVelx, iniVely, iniVelz;

  /* store output path, and file prefix for baked fluid surface */
  /* strlens; 256= FILE_MAXFILE, 768= FILE_MAXDIR */
  char surfdataPath[1024];

  /* store start coords of axis aligned bounding box together with size */
  /* values are inited during derived mesh display */
  float bbStart[3], bbSize[3];

  /* animated params */
  struct Ipo *ipo;

  /* additional flags depending on the type, lower short contains flags
   * to check validity, higher short additional flags */
  short typeFlags;
  /**
   * Switch off velocity generation,
   * volume init type for fluid/obstacles (volume=1, shell=2, both=3).
   */
  char domainNovecgen, volumeInitType;

  /* boundary "stickiness" for part slip values */
  float partSlipValue;

  /* number of tracers to generate */
  int generateTracers;
  /* particle generation - on if >0, then determines amount (experimental...) */
  float generateParticles;
  /* smooth fluid surface? */
  float surfaceSmoothing;
  /** Number of surface subdivisions. */
  int surfaceSubdivs;
  /** GUI flags. */
  int flag;

  /** Particle display - size scaling, and alpha influence. */
  float particleInfSize, particleInfAlpha;
  /* testing vars */
  float farFieldSize;

  /** Vertex velocities of simulated fluid mesh. */
  struct FluidVertexVelocity *meshVelocities;
  /** Number of vertices in simulated fluid mesh. */
  int totvert;

  /* Fluid control settings */
  float cpsTimeStart;
  float cpsTimeEnd;
  float cpsQuality;

  float attractforceStrength;
  float attractforceRadius;
  float velocityforceStrength;
  float velocityforceRadius;

  int lastgoodframe;

  /** Simulation/flow rate control (i.e. old "Fac-Time"). */
  float animRate;
} FluidsimSettings;

/* ob->fluidsimSettings defines */
#define OB_FLUIDSIM_ENABLE 1
#define OB_FLUIDSIM_DOMAIN 2
#define OB_FLUIDSIM_FLUID 4
#define OB_FLUIDSIM_OBSTACLE 8
#define OB_FLUIDSIM_INFLOW 16
#define OB_FLUIDSIM_OUTFLOW 32
#define OB_FLUIDSIM_PARTICLE 64
#define OB_FLUIDSIM_CONTROL 128

#define OB_TYPEFLAG_START 7
#define OB_FSGEO_THIN (1 << (OB_TYPEFLAG_START + 1))
#define OB_FSBND_NOSLIP (1 << (OB_TYPEFLAG_START + 2))
#define OB_FSBND_PARTSLIP (1 << (OB_TYPEFLAG_START + 3))
#define OB_FSBND_FREESLIP (1 << (OB_TYPEFLAG_START + 4))
#define OB_FSINFLOW_LOCALCOORD (1 << (OB_TYPEFLAG_START + 5))

/* surface generation flag (part of enabling chapter 6 of
 * "Free Surface Flows with Moving and Deforming Objects for LBM") */
#define OB_FSSG_NOOBS (1 << (OB_TYPEFLAG_START + 6))

// guiDisplayMode particle flags
#define OB_FSDOM_GEOM 1
#define OB_FSDOM_PREVIEW 2
#define OB_FSDOM_FINAL 3
#define OB_FSPART_BUBBLE (1 << 1)
#define OB_FSPART_DROP (1 << 2)
#define OB_FSPART_NEWPART (1 << 3)
#define OB_FSPART_FLOAT (1 << 4)
#define OB_FSPART_TRACER (1 << 5)

// new fluid bit flags for fss->flags
#define OB_FLUIDSIM_REVERSE (1 << 0)
#define OB_FLUIDSIM_ACTIVE (1 << 1)
#define OB_FLUIDSIM_OVERRIDE_TIME (1 << 2)

#ifdef __cplusplus
}
#endif