MOD_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) 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 *****
 *
 */

#include "DNA_scene_types.h"
#include "DNA_object_fluidsim.h"
#include "DNA_object_types.h"

#include "BLI_utildefines.h"


#include "BKE_cdderivedmesh.h"
#include "BKE_modifier.h"

#include "depsgraph_private.h"

#include "MOD_util.h"
#include "MOD_fluidsim_util.h"
#include "MEM_guardedalloc.h"

/* Fluidsim */
static void initData(ModifierData *md)
{
    FluidsimModifierData *fluidmd= (FluidsimModifierData*) md;
    
    fluidsim_init(fluidmd);
}
static void freeData(ModifierData *md)
{
    FluidsimModifierData *fluidmd= (FluidsimModifierData*) md;
    
    fluidsim_free(fluidmd);
}

static void copyData(ModifierData *md, ModifierData *target)
{
    FluidsimModifierData *fluidmd= (FluidsimModifierData*) md;
    FluidsimModifierData *tfluidmd= (FluidsimModifierData*) target;
    
    if(tfluidmd->fss)
        MEM_freeN(tfluidmd->fss);
    
    tfluidmd->fss = MEM_dupallocN(fluidmd->fss);
}



static DerivedMesh *applyModifier(ModifierData *md, Object *ob,
                        DerivedMesh *dm,
                        int useRenderParams,
                        int isFinalCalc)
{
    FluidsimModifierData *fluidmd= (FluidsimModifierData*) md;
    DerivedMesh *result = NULL;
    
    /* check for alloc failing */
    if(!fluidmd->fss)
    {
        initData(md);
        
        if(!fluidmd->fss)
            return dm;
    }

    result= fluidsimModifier_do(fluidmd, md->scene, ob, dm, useRenderParams, isFinalCalc);

    return result ? result : dm;
}

static void updateDepgraph(
        ModifierData *md, DagForest *forest, Scene *scene,
      Object *ob, DagNode *obNode)
{
    FluidsimModifierData *fluidmd= (FluidsimModifierData*) md;
    Base *base;

    if(fluidmd && fluidmd->fss)
    {
        if(fluidmd->fss->type == OB_FLUIDSIM_DOMAIN)
        {
            for(base = scene->base.first; base; base= base->next) 
            {
                Object *ob1= base->object;
                if(ob1 != ob)
                {
                    FluidsimModifierData *fluidmdtmp = (FluidsimModifierData *)modifiers_findByType(ob1, eModifierType_Fluidsim);
                    
                    // only put dependancies from NON-DOMAIN fluids in here
                    if(fluidmdtmp && fluidmdtmp->fss && (fluidmdtmp->fss->type!=OB_FLUIDSIM_DOMAIN))
                    {
                        DagNode *curNode = dag_get_node(forest, ob1);
                        dag_add_relation(forest, curNode, obNode, DAG_RL_DATA_DATA|DAG_RL_OB_DATA, "Fluidsim Object");
                    }
                }
            }
        }
    }
}

static int dependsOnTime(ModifierData *UNUSED(md)) 
{
    return 1;
}


ModifierTypeInfo modifierType_Fluidsim = {
    /* name */              "Fluidsim",
    /* structName */        "FluidsimModifierData",
    /* structSize */        sizeof(FluidsimModifierData),
    /* type */              eModifierTypeType_Nonconstructive,

    /* flags */             eModifierTypeFlag_AcceptsMesh
                            | eModifierTypeFlag_RequiresOriginalData
                            | eModifierTypeFlag_Single,

    /* copyData */          copyData,
    /* deformVerts */       NULL,
    /* deformMatrices */    NULL,
    /* deformVertsEM */     NULL,
    /* deformMatricesEM */  NULL,
    /* applyModifier */     applyModifier,
    /* applyModifierEM */   NULL,
    /* initData */          initData,
    /* requiredDataMask */  NULL,
    /* freeData */          freeData,
    /* isDisabled */        NULL,
    /* updateDepgraph */    updateDepgraph,
    /* dependsOnTime */     dependsOnTime,
    /* dependsOnNormals */  NULL,
    /* foreachObjectLink */ NULL,
    /* foreachIDLink */     NULL,
    /* foreachTexLink */    NULL,
};