fluidsim.c

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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) Blender Foundation
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): none yet.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#include <stddef.h>

#include "MEM_guardedalloc.h"

#include "DNA_mesh_types.h"
#include "DNA_meshdata_types.h"
#include "DNA_object_fluidsim.h"
#include "DNA_object_force.h" // for pointcache 
#include "DNA_object_types.h"
#include "DNA_particle_types.h"
#include "DNA_scene_types.h" // N_T

#include "BLI_math.h"
#include "BLI_blenlib.h"
#include "BLI_utildefines.h"

#include "BKE_cdderivedmesh.h"
#include "BKE_customdata.h"
#include "BKE_DerivedMesh.h"
#include "BKE_fluidsim.h"
#include "BKE_global.h"
#include "BKE_modifier.h"
#include "BKE_mesh.h"


// headers for fluidsim bobj meshes
#include <stdlib.h>
#include "LBM_fluidsim.h"
#include <zlib.h>
#include <string.h>
#include <stdio.h>

/* ************************* fluidsim bobj file handling **************************** */


//-------------------------------------------------------------------------------
// file handling
//-------------------------------------------------------------------------------

void initElbeemMesh(struct Scene *scene, struct Object *ob,
            int *numVertices, float **vertices,
      int *numTriangles, int **triangles,
      int useGlobalCoords, int modifierIndex)
{
    DerivedMesh *dm = NULL;
    MVert *mvert;
    MFace *mface;
    int countTris=0, i, totvert, totface;
    float *verts;
    int *tris;

    dm = mesh_create_derived_index_render(scene, ob, CD_MASK_BAREMESH, modifierIndex);
    //dm = mesh_create_derived_no_deform(ob,NULL);

    mvert = dm->getVertArray(dm);
    mface = dm->getFaceArray(dm);
    totvert = dm->getNumVerts(dm);
    totface = dm->getNumFaces(dm);

    *numVertices = totvert;
    verts = MEM_callocN( totvert*3*sizeof(float), "elbeemmesh_vertices");
    for(i=0; i<totvert; i++) {
        copy_v3_v3(&verts[i*3], mvert[i].co);
        if(useGlobalCoords) { mul_m4_v3(ob->obmat, &verts[i*3]); }
    }
    *vertices = verts;

    for(i=0; i<totface; i++) {
        countTris++;
        if(mface[i].v4) { countTris++; }
    }
    *numTriangles = countTris;
    tris = MEM_callocN( countTris*3*sizeof(int), "elbeemmesh_triangles");
    countTris = 0;
    for(i=0; i<totface; i++) {
        int face[4];
        face[0] = mface[i].v1;
        face[1] = mface[i].v2;
        face[2] = mface[i].v3;
        face[3] = mface[i].v4;

        tris[countTris*3+0] = face[0];
        tris[countTris*3+1] = face[1];
        tris[countTris*3+2] = face[2];
        countTris++;
        if(face[3]) {
            tris[countTris*3+0] = face[0];
            tris[countTris*3+1] = face[2];
            tris[countTris*3+2] = face[3];
            countTris++;
        }
    }
    *triangles = tris;

    dm->release(dm);
}