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/*
* ***** 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) 2005 by the Blender Foundation.
* All rights reserved.
*
* Contributor(s): Daniel Dunbar
* Ton Roosendaal,
* Ben Batt,
* Brecht Van Lommel,
* Campbell Barton
*
* ***** END GPL LICENSE BLOCK *****
*
*/
/** \file blender/modifiers/intern/MOD_fluidsim_util.c
* \ingroup modifiers
*/
#include <stddef.h>
#include <zlib.h>
#include "DNA_object_types.h"
#include "DNA_scene_types.h"
#include "DNA_mesh_types.h"
#include "DNA_meshdata_types.h"
#include "DNA_object_types.h"
#include "DNA_object_fluidsim.h"
#include "BLI_blenlib.h"
#include "BLI_math.h"
#include "BLI_utildefines.h"
#include "BKE_main.h"
#include "BKE_fluidsim.h" /* ensure definitions here match */
#include "BKE_cdderivedmesh.h"
#include "BKE_mesh.h"
#include "BKE_global.h" /* G.main->name only */
#include "MOD_fluidsim_util.h"
#include "MOD_modifiertypes.h"
#include "MEM_guardedalloc.h"
// headers for fluidsim bobj meshes
#include "LBM_fluidsim.h"
void fluidsim_init(FluidsimModifierData *fluidmd)
{
#ifdef WITH_MOD_FLUID
if (fluidmd) {
FluidsimSettings *fss = MEM_callocN(sizeof(FluidsimSettings), "fluidsimsettings");
fluidmd->fss = fss;
if (!fss)
return;
fss->fmd = fluidmd;
fss->type = OB_FLUIDSIM_ENABLE;
fss->threads = 4;
fss->show_advancedoptions = 0;
fss->resolutionxyz = 65;
fss->previewresxyz = 45;
fss->realsize = 0.5;
fss->guiDisplayMode = 2; // preview
fss->renderDisplayMode = 3; // render
fss->viscosityValue = 1.0;
fss->viscosityExponent = 6;
fss->grav[0] = 0.0;
fss->grav[1] = 0.0;
fss->grav[2] = -9.81;
fss->animStart = 0.0;
fss->animEnd = 4.0;
fss->animRate = 1.0;
fss->gstar = 0.005; // used as normgstar
fss->maxRefine = -1;
/* maxRefine is set according to resolutionxyz during bake */
/* fluid/inflow settings
* fss->iniVel --> automatically set to 0 */
modifier_path_init(fss->surfdataPath, sizeof(fss->surfdataPath), "cache_fluid");
/* first init of bounding box */
/* no bounding box needed */
/* todo - reuse default init from elbeem! */
fss->typeFlags = OB_FSBND_PARTSLIP | OB_FSSG_NOOBS;
fss->domainNovecgen = 0;
fss->volumeInitType = 1; /* volume */
fss->partSlipValue = 0.2;
fss->generateTracers = 0;
fss->generateParticles = 0.0;
fss->surfaceSmoothing = 1.0;
fss->surfaceSubdivs = 0.0;
fss->particleInfSize = 0.0;
fss->particleInfAlpha = 0.0;
/* init fluid control settings */
fss->attractforceStrength = 0.2;
fss->attractforceRadius = 0.75;
fss->velocityforceStrength = 0.2;
fss->velocityforceRadius = 0.75;
fss->cpsTimeStart = fss->animStart;
fss->cpsTimeEnd = fss->animEnd;
fss->cpsQuality = 10.0; // 1.0 / 10.0 => means 0.1 width
/*
* BAD TODO: this is done in buttons_object.c in the moment
* Mesh *mesh = ob->data;
* // calculate bounding box
* fluid_get_bb(mesh->mvert, mesh->totvert, ob->obmat, fss->bbStart, fss->bbSize);
*/
fss->meshVelocities = NULL;
fss->lastgoodframe = -1;
fss->flag |= OB_FLUIDSIM_ACTIVE;
}
#else
(void)fluidmd; /* unused */
#endif
return;
}
void fluidsim_free(FluidsimModifierData *fluidmd)
{
if (fluidmd && fluidmd->fss) {
if (fluidmd->fss->meshVelocities) {
MEM_freeN(fluidmd->fss->meshVelocities);
fluidmd->fss->meshVelocities = NULL;
}
MEM_freeN(fluidmd->fss);
}
return;
}
#ifdef WITH_MOD_FLUID
/* read .bobj.gz file into a fluidsimDerivedMesh struct */
static DerivedMesh *fluidsim_read_obj(const char *filename, const MPoly *mp_example)
{
int wri = 0, i;
int gotBytes;
gzFile gzf;
int numverts = 0, numfaces = 0;
DerivedMesh *dm = NULL;
MPoly *mp;
MLoop *ml;
MVert *mv;
short *normals, *no_s;
float no[3];
const short mp_mat_nr = mp_example->mat_nr;
const char mp_flag = mp_example->flag;
/* ------------------------------------------------
* get numverts + numfaces first
* ------------------------------------------------ */
gzf = BLI_gzopen(filename, "rb");
if (!gzf) {
return NULL;
}
/* read numverts */
gotBytes = gzread(gzf, &wri, sizeof(wri));
numverts = wri;
/* skip verts */
gotBytes = gzseek(gzf, numverts * 3 * sizeof(float), SEEK_CUR) != -1;
/* read number of normals */
if (gotBytes)
gotBytes = gzread(gzf, &wri, sizeof(wri));
/* skip normals */
gotBytes = gzseek(gzf, numverts * 3 * sizeof(float), SEEK_CUR) != -1;
/* get no. of triangles */
if (gotBytes)
gotBytes = gzread(gzf, &wri, sizeof(wri));
numfaces = wri;
gzclose(gzf);
/* ------------------------------------------------ */
if (!numfaces || !numverts || !gotBytes)
return NULL;
gzf = BLI_gzopen(filename, "rb");
if (!gzf) {
return NULL;
}
dm = CDDM_new(numverts, 0, 0, numfaces * 3, numfaces);
if (!dm) {
gzclose(gzf);
return NULL;
}
/* read numverts */
gotBytes = gzread(gzf, &wri, sizeof(wri));
/* read vertex position from file */
mv = CDDM_get_verts(dm);
for (i = 0; i < numverts; i++, mv++)
gotBytes = gzread(gzf, mv->co, sizeof(float) * 3);
/* should be the same as numverts */
gotBytes = gzread(gzf, &wri, sizeof(wri));
if (wri != numverts) {
if (dm)
dm->release(dm);
gzclose(gzf);
return NULL;
}
normals = MEM_callocN(sizeof(short) * numverts * 3, "fluid_tmp_normals");
if (!normals) {
if (dm)
dm->release(dm);
gzclose(gzf);
return NULL;
}
/* read normals from file (but don't save them yet) */
for (i = numverts, no_s = normals; i > 0; i--, no_s += 3) {
gotBytes = gzread(gzf, no, sizeof(float) * 3);
normal_float_to_short_v3(no_s, no);
}
/* read no. of triangles */
gotBytes = gzread(gzf, &wri, sizeof(wri));
if (wri != numfaces) {
printf("Fluidsim: error in reading data from file.\n");
if (dm)
dm->release(dm);
gzclose(gzf);
MEM_freeN(normals);
return NULL;
}
/* read triangles from file */
mp = CDDM_get_polys(dm);
ml = CDDM_get_loops(dm);
for (i = 0; i < numfaces; i++, mp++, ml += 3) {
int face[3];
gotBytes = gzread(gzf, face, sizeof(int) * 3);
/* initialize from existing face */
mp->mat_nr = mp_mat_nr;
mp->flag = mp_flag;
mp->loopstart = i * 3;
mp->totloop = 3;
ml[0].v = face[0];
ml[1].v = face[1];
ml[2].v = face[2];
}
gzclose(gzf);
CDDM_calc_edges(dm);
CDDM_apply_vert_normals(dm, (short (*)[3])normals);
MEM_freeN(normals);
// CDDM_calc_normals(result);
return dm;
}
void fluid_get_bb(MVert *mvert, int totvert, float obmat[4][4],
/*RET*/ float start[3], /*RET*/ float size[3])
{
float bbsx = 0.0, bbsy = 0.0, bbsz = 0.0;
float bbex = 1.0, bbey = 1.0, bbez = 1.0;
int i;
float vec[3];
if (totvert == 0) {
zero_v3(start);
zero_v3(size);
return;
}
copy_v3_v3(vec, mvert[0].co);
mul_m4_v3(obmat, vec);
bbsx = vec[0]; bbsy = vec[1]; bbsz = vec[2];
bbex = vec[0]; bbey = vec[1]; bbez = vec[2];
for (i = 1; i < totvert; i++) {
copy_v3_v3(vec, mvert[i].co);
mul_m4_v3(obmat, vec);
if (vec[0] < bbsx) { bbsx = vec[0]; }
if (vec[1] < bbsy) { bbsy = vec[1]; }
if (vec[2] < bbsz) { bbsz = vec[2]; }
if (vec[0] > bbex) { bbex = vec[0]; }
if (vec[1] > bbey) { bbey = vec[1]; }
if (vec[2] > bbez) { bbez = vec[2]; }
}
/* return values... */
if (start) {
start[0] = bbsx;
start[1] = bbsy;
start[2] = bbsz;
}
if (size) {
size[0] = bbex - bbsx;
size[1] = bbey - bbsy;
size[2] = bbez - bbsz;
}
}
//-------------------------------------------------------------------------------
// old interface
//-------------------------------------------------------------------------------
void fluid_estimate_memory(Object *ob, FluidsimSettings *fss, char *value)
{
Mesh *mesh;
value[0] = '\0';
if (ob->type == OB_MESH) {
/* use mesh bounding box and object scaling */
mesh = ob->data;
fluid_get_bb(mesh->mvert, mesh->totvert, ob->obmat, fss->bbStart, fss->bbSize);
elbeemEstimateMemreq(fss->resolutionxyz, fss->bbSize[0], fss->bbSize[1], fss->bbSize[2], fss->maxRefine, value);
}
}
/* read zipped fluidsim velocities into the co's of the fluidsimsettings normals struct */
static void fluidsim_read_vel_cache(FluidsimModifierData *fluidmd, DerivedMesh *dm, char *filename)
{
int wri, i, j;
float wrf;
gzFile gzf;
FluidsimSettings *fss = fluidmd->fss;
int len = strlen(filename);
int totvert = dm->getNumVerts(dm);
FluidVertexVelocity *velarray = NULL;
/* mesh and vverts have to be valid from loading... */
if (fss->meshVelocities)
MEM_freeN(fss->meshVelocities);
if (len < 7) {
return;
}
if (fss->domainNovecgen > 0) return;
fss->meshVelocities = MEM_callocN(sizeof(FluidVertexVelocity) * dm->getNumVerts(dm), "Fluidsim_velocities");
fss->totvert = totvert;
velarray = fss->meshVelocities;
/* .bobj.gz, correct filename
* 87654321 */
filename[len - 6] = 'v';
filename[len - 5] = 'e';
filename[len - 4] = 'l';
gzf = BLI_gzopen(filename, "rb");
if (!gzf) {
MEM_freeN(fss->meshVelocities);
fss->meshVelocities = NULL;
return;
}
gzread(gzf, &wri, sizeof(wri));
if (wri != totvert) {
MEM_freeN(fss->meshVelocities);
fss->meshVelocities = NULL;
return;
}
for (i = 0; i < totvert; i++) {
for (j = 0; j < 3; j++) {
gzread(gzf, &wrf, sizeof(wrf));
velarray[i].vel[j] = wrf;
}
}
gzclose(gzf);
}
static DerivedMesh *fluidsim_read_cache(Object *ob, DerivedMesh *orgdm,
FluidsimModifierData *fluidmd, int framenr, int useRenderParams)
{
int displaymode = 0;
int curFrame = framenr /* - 1 */ /*scene->r.sfra*/; /* start with 0 at start frame */
/* why start with 0 as start frame?? Animations + time are frozen for frame 0 anyway. (See physics_fluid.c for that. - DG */
/* If we start with frame 0, we need to remap all animation channels, too, because they will all be 1 frame late if using frame-1! - DG */
char targetFile[FILE_MAX];
FluidsimSettings *fss = fluidmd->fss;
DerivedMesh *dm = NULL;
MPoly *mpoly;
MPoly mp_example = {0};
if (!useRenderParams) {
displaymode = fss->guiDisplayMode;
}
else {
displaymode = fss->renderDisplayMode;
}
switch (displaymode) {
case 1:
/* just display original object */
return NULL;
case 2:
/* use preview mesh */
BLI_join_dirfile(targetFile, sizeof(targetFile), fss->surfdataPath, OB_FLUIDSIM_SURF_PREVIEW_OBJ_FNAME);
break;
default: /* 3 */
/* 3. use final mesh */
BLI_join_dirfile(targetFile, sizeof(targetFile), fss->surfdataPath, OB_FLUIDSIM_SURF_FINAL_OBJ_FNAME);
break;
}
/* offset baked frame */
curFrame += fss->frameOffset;
BLI_path_abs(targetFile, modifier_path_relbase(ob));
BLI_path_frame(targetFile, curFrame, 0); // fixed #frame-no
/* assign material + flags to new dm
* if there's no faces in original dm, keep materials and flags unchanged */
mpoly = orgdm->getPolyArray(orgdm);
if (mpoly) {
mp_example = *mpoly;
}
/* else leave NULL'd */
dm = fluidsim_read_obj(targetFile, &mp_example);
if (!dm) {
/* switch, abort background rendering when fluidsim mesh is missing */
const char *strEnvName2 = "BLENDER_ELBEEMBOBJABORT"; // from blendercall.cpp
if (G.background == 1) {
if (getenv(strEnvName2)) {
int elevel = atoi(getenv(strEnvName2));
if (elevel > 0) {
printf("Env. var %s set, fluid sim mesh '%s' not found, aborting render...\n",
strEnvName2, targetFile);
exit(1);
}
}
}
/* display org. object upon failure which is in dm */
return NULL;
}
/* load vertex velocities, if they exist...
* TODO? use generate flag as loading flag as well?
* warning, needs original .bobj.gz mesh loading filename */
if (displaymode == 3) {
fluidsim_read_vel_cache(fluidmd, dm, targetFile);
}
else {
if (fss->meshVelocities)
MEM_freeN(fss->meshVelocities);
fss->meshVelocities = NULL;
}
return dm;
}
#endif // WITH_MOD_FLUID
DerivedMesh *fluidsimModifier_do(FluidsimModifierData *fluidmd, Scene *scene,
Object *ob,
DerivedMesh *dm,
int useRenderParams, int UNUSED(isFinalCalc))
{
#ifdef WITH_MOD_FLUID
DerivedMesh *result = NULL;
int framenr;
FluidsimSettings *fss = NULL;
framenr = (int)scene->r.cfra;
/* only handle fluidsim domains */
if (fluidmd && fluidmd->fss && (fluidmd->fss->type != OB_FLUIDSIM_DOMAIN))
return dm;
/* sanity check */
if (!fluidmd || (fluidmd && !fluidmd->fss))
return dm;
fss = fluidmd->fss;
/* timescale not supported yet
* clmd->sim_parms->timescale = timescale; */
/* support reversing of baked fluid frames here */
if ((fss->flag & OB_FLUIDSIM_REVERSE) && (fss->lastgoodframe >= 0)) {
framenr = fss->lastgoodframe - framenr + 1;
CLAMP(framenr, 1, fss->lastgoodframe);
}
/* try to read from cache */
/* if the frame is there, fine, otherwise don't do anything */
if ((result = fluidsim_read_cache(ob, dm, fluidmd, framenr, useRenderParams)))
return result;
return dm;
#else
/* unused */
(void)fluidmd;
(void)scene;
(void)ob;
(void)dm;
(void)useRenderParams;
return NULL;
#endif
}
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