MOD_cloth.c

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/*
* $Id: MOD_cloth.c 37326 2011-06-09 02:47:22Z campbellbarton $
*
* ***** 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_cloth_types.h"
#include "DNA_scene_types.h"
#include "DNA_object_types.h"

#include "MEM_guardedalloc.h"

#include "BLI_utildefines.h"


#include "BKE_cloth.h"
#include "BKE_cdderivedmesh.h"
#include "BKE_global.h"
#include "BKE_modifier.h"
#include "BKE_pointcache.h"

#include "depsgraph_private.h"

#include "MOD_util.h"

static void initData(ModifierData *md) 
{
        ClothModifierData *clmd = (ClothModifierData*) md;
        
        clmd->sim_parms = MEM_callocN(sizeof(ClothSimSettings), "cloth sim parms");
        clmd->coll_parms = MEM_callocN(sizeof(ClothCollSettings), "cloth coll parms");
        clmd->point_cache = BKE_ptcache_add(&clmd->ptcaches);
        
        /* check for alloc failing */
        if(!clmd->sim_parms || !clmd->coll_parms || !clmd->point_cache)
                return;
        
        cloth_init (clmd);
}

static DerivedMesh *applyModifier(ModifierData *md, Object *ob,
                                                DerivedMesh *dm,
                                                int UNUSED(useRenderParams),
                                                int UNUSED(isFinalCalc))
{
        ClothModifierData *clmd = (ClothModifierData*) md;
        DerivedMesh *result=NULL;
        
        /* check for alloc failing */
        if(!clmd->sim_parms || !clmd->coll_parms)
        {
                initData(md);
                
                if(!clmd->sim_parms || !clmd->coll_parms)
                        return dm;
        }

        result = clothModifier_do(clmd, md->scene, ob, dm);

        if(result)
        {
                CDDM_calc_normals(result);
                return result;
        }
        return dm;
}

static void updateDepgraph(
                                         ModifierData *md, DagForest *forest, Scene *scene, Object *ob,
          DagNode *obNode)
{
        ClothModifierData *clmd = (ClothModifierData*) md;
        
        Base *base;
        
        if(clmd)
        {
                for(base = scene->base.first; base; base= base->next) 
                {
                        Object *ob1= base->object;
                        if(ob1 != ob)
                        {
                                CollisionModifierData *coll_clmd = (CollisionModifierData *)modifiers_findByType(ob1, eModifierType_Collision);
                                if(coll_clmd)
                                {
                                        DagNode *curNode = dag_get_node(forest, ob1);
                                        dag_add_relation(forest, curNode, obNode, DAG_RL_DATA_DATA|DAG_RL_OB_DATA, "Cloth Collision");
                                }
                        }
                }
        }
}

static CustomDataMask requiredDataMask(Object *UNUSED(ob), ModifierData *md)
{
        CustomDataMask dataMask = 0;
        ClothModifierData *clmd = (ClothModifierData*)md;

        if(cloth_uses_vgroup(clmd))
                dataMask |= CD_MASK_MDEFORMVERT;

        if(clmd->sim_parms->shapekey_rest != 0)
                dataMask |= CD_MASK_CLOTH_ORCO;

        return dataMask;
}

static void copyData(ModifierData *md, ModifierData *target)
{
        ClothModifierData *clmd = (ClothModifierData*) md;
        ClothModifierData *tclmd = (ClothModifierData*) target;

        if(tclmd->sim_parms) {
                if(tclmd->sim_parms->effector_weights)
                        MEM_freeN(tclmd->sim_parms->effector_weights);
                MEM_freeN(tclmd->sim_parms);
        }

        if(tclmd->coll_parms)
                MEM_freeN(tclmd->coll_parms);
        
        BKE_ptcache_free_list(&tclmd->ptcaches);
        tclmd->point_cache = NULL;

        tclmd->sim_parms = MEM_dupallocN(clmd->sim_parms);
        if(clmd->sim_parms->effector_weights)
                tclmd->sim_parms->effector_weights = MEM_dupallocN(clmd->sim_parms->effector_weights);
        tclmd->coll_parms = MEM_dupallocN(clmd->coll_parms);
        tclmd->point_cache = BKE_ptcache_copy_list(&tclmd->ptcaches, &clmd->ptcaches);
        tclmd->clothObject = NULL;
}

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

static void freeData(ModifierData *md)
{
        ClothModifierData *clmd = (ClothModifierData*) md;
        
        if (clmd) 
        {
                if(G.rt > 0)
                        printf("clothModifier_freeData\n");
                
                cloth_free_modifier_extern (clmd);
                
                if(clmd->sim_parms) {
                        if(clmd->sim_parms->effector_weights)
                                MEM_freeN(clmd->sim_parms->effector_weights);
                        MEM_freeN(clmd->sim_parms);
                }
                if(clmd->coll_parms)
                        MEM_freeN(clmd->coll_parms);    
                
                BKE_ptcache_free_list(&clmd->ptcaches);
                clmd->point_cache = NULL;
        }
}

static void foreachIDLink(ModifierData *md, Object *ob,
                                           IDWalkFunc walk, void *userData)
{
        ClothModifierData *clmd = (ClothModifierData*) md;

        if(clmd->coll_parms) {
                walk(userData, ob, (ID **)&clmd->coll_parms->group);
        }

        if(clmd->sim_parms && clmd->sim_parms->effector_weights) {
                walk(userData, ob, (ID **)&clmd->sim_parms->effector_weights->group);
        }
}

ModifierTypeInfo modifierType_Cloth = {
        /* name */              "Cloth",
        /* structName */        "ClothModifierData",
        /* structSize */        sizeof(ClothModifierData),
        /* type */              eModifierTypeType_Nonconstructive,
        /* flags */             eModifierTypeFlag_AcceptsMesh
                                                        | eModifierTypeFlag_UsesPointCache
                                                        | eModifierTypeFlag_Single,

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