object_modifier.c

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/*
 * $Id: object_modifier.c 38115 2011-07-05 10:35:48Z blendix $
 *
 * ***** 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) 2001-2002 by NaN Holding BV.
 * All rights reserved.
 *
 * Contributor(s): Blender Foundation, 2009
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#include <math.h>
#include <stdio.h>
#include <stdlib.h>

#include "MEM_guardedalloc.h"

#include "DNA_curve_types.h"
#include "DNA_key_types.h"
#include "DNA_mesh_types.h"
#include "DNA_meshdata_types.h"
#include "DNA_object_force.h"
#include "DNA_scene_types.h"

#include "BLI_math.h"
#include "BLI_listbase.h"
#include "BLI_string.h"
#include "BLI_path_util.h"
#include "BLI_editVert.h"
#include "BLI_utildefines.h"

#include "BKE_curve.h"
#include "BKE_context.h"
#include "BKE_depsgraph.h"
#include "BKE_displist.h"
#include "BKE_DerivedMesh.h"
#include "BKE_effect.h"
#include "BKE_global.h"
#include "BKE_key.h"
#include "BKE_lattice.h"
#include "BKE_main.h"
#include "BKE_mesh.h"
#include "BKE_modifier.h"
#include "BKE_multires.h"
#include "BKE_report.h"
#include "BKE_object.h"
#include "BKE_particle.h"
#include "BKE_softbody.h"

#include "RNA_access.h"
#include "RNA_define.h"
#include "RNA_enum_types.h"

#include "ED_armature.h"
#include "ED_object.h"
#include "ED_screen.h"
#include "ED_mesh.h"

#include "WM_api.h"
#include "WM_types.h"

#include "object_intern.h"

/******************************** API ****************************/

ModifierData *ED_object_modifier_add(ReportList *reports, Main *bmain, Scene *scene, Object *ob, const char *name, int type)
{
        ModifierData *md=NULL, *new_md=NULL;
        ModifierTypeInfo *mti = modifierType_getInfo(type);
        
        /* only geometry objects should be able to get modifiers [#25291] */
        if(!ELEM5(ob->type, OB_MESH, OB_CURVE, OB_SURF, OB_FONT, OB_LATTICE)) {
                BKE_reportf(reports, RPT_WARNING, "Modifiers cannot be added to Object '%s'", ob->id.name+2);
                return NULL;
        }
        
        if(mti->flags&eModifierTypeFlag_Single) {
                if(modifiers_findByType(ob, type)) {
                        BKE_report(reports, RPT_WARNING, "Only one modifier of this type allowed.");
                        return NULL;
                }
        }
        
        if(type == eModifierType_ParticleSystem) {
                /* don't need to worry about the new modifier's name, since that is set to the number
                 * of particle systems which shouldn't have too many duplicates 
                 */
                new_md = object_add_particle_system(scene, ob, name);
        }
        else {
                /* get new modifier data to add */
                new_md= modifier_new(type);
                
                if(mti->flags&eModifierTypeFlag_RequiresOriginalData) {
                        md = ob->modifiers.first;
                        
                        while(md && modifierType_getInfo(md->type)->type==eModifierTypeType_OnlyDeform)
                                md = md->next;
                        
                        BLI_insertlinkbefore(&ob->modifiers, md, new_md);
                }
                else
                        BLI_addtail(&ob->modifiers, new_md);

                if(name)
                        BLI_strncpy(new_md->name, name, sizeof(new_md->name));

                /* make sure modifier data has unique name */

                modifier_unique_name(&ob->modifiers, new_md);
                
                /* special cases */
                if(type == eModifierType_Softbody) {
                        if(!ob->soft) {
                                ob->soft= sbNew(scene);
                                ob->softflag |= OB_SB_GOAL|OB_SB_EDGES;
                        }
                }
                else if(type == eModifierType_Collision) {
                        if(!ob->pd)
                                ob->pd= object_add_collision_fields(0);
                        
                        ob->pd->deflect= 1;
                        DAG_scene_sort(bmain, scene);
                }
                else if(type == eModifierType_Surface)
                        DAG_scene_sort(bmain, scene);
                else if(type == eModifierType_Multires)
                        /* set totlvl from existing MDISPS layer if object already had it */
                        multiresModifier_set_levels_from_disps((MultiresModifierData *)new_md, ob);
        }

        DAG_id_tag_update(&ob->id, OB_RECALC_DATA);

        return new_md;
}

int ED_object_modifier_remove(ReportList *reports, Main *bmain, Scene *scene, Object *ob, ModifierData *md)
{
        ModifierData *obmd;
        int sort_depsgraph = 0;

        /* It seems on rapid delete it is possible to
         * get called twice on same modifier, so make
         * sure it is in list. */
        for(obmd=ob->modifiers.first; obmd; obmd=obmd->next)
                if(obmd==md)
                        break;
        
        if(!obmd) {
                BKE_reportf(reports, RPT_ERROR, "Modifier '%s' not in object '%s'.", ob->id.name, md->name);
                return 0;
        }

        /* special cases */
        if(md->type == eModifierType_ParticleSystem) {
                ParticleSystemModifierData *psmd=(ParticleSystemModifierData*)md;

                BLI_remlink(&ob->particlesystem, psmd->psys);
                psys_free(ob, psmd->psys);
                psmd->psys= NULL;
        }
        else if(md->type == eModifierType_Softbody) {
                if(ob->soft) {
                        sbFree(ob->soft);
                        ob->soft= NULL;
                        ob->softflag= 0;
                }
        }
        else if(md->type == eModifierType_Collision) {
                if(ob->pd)
                        ob->pd->deflect= 0;

                sort_depsgraph = 1;
        }
        else if(md->type == eModifierType_Surface) {
                if(ob->pd && ob->pd->shape == PFIELD_SHAPE_SURFACE)
                        ob->pd->shape = PFIELD_SHAPE_PLANE;

                sort_depsgraph = 1;
        }
        else if(md->type == eModifierType_Smoke) {
                ob->dt = OB_TEXTURE;
        }
        else if(md->type == eModifierType_Multires) {
                int ok= 1;
                Mesh *me= ob->data;
                ModifierData *tmpmd;

                /* ensure MDISPS CustomData layer is't used by another multires modifiers */
                for(tmpmd= ob->modifiers.first; tmpmd; tmpmd= tmpmd->next)
                        if(tmpmd!=md && tmpmd->type == eModifierType_Multires) {
                                ok= 0;
                                break;
                        }

                if(ok) {
                        if(me->edit_mesh) {
                                EditMesh *em= me->edit_mesh;
                                /* CustomData_external_remove is used here only to mark layer as non-external
                                   for further free-ing, so zero element count looks safer than em->totface */
                                CustomData_external_remove(&em->fdata, &me->id, CD_MDISPS, 0);
                                EM_free_data_layer(em, &em->fdata, CD_MDISPS);
                        } else {
                                CustomData_external_remove(&me->fdata, &me->id, CD_MDISPS, me->totface);
                                CustomData_free_layer_active(&me->fdata, CD_MDISPS, me->totface);
                        }
                }
        }

        if(ELEM(md->type, eModifierType_Softbody, eModifierType_Cloth) &&
                ob->particlesystem.first == NULL) {
                ob->mode &= ~OB_MODE_PARTICLE_EDIT;
        }

        BLI_remlink(&ob->modifiers, md);
        modifier_free(md);

        DAG_id_tag_update(&ob->id, OB_RECALC_DATA);

        /* sorting has to be done after the update so that dynamic systems can react properly */
        if(sort_depsgraph)
                DAG_scene_sort(bmain, scene);

        return 1;
}

int ED_object_modifier_move_up(ReportList *reports, Object *ob, ModifierData *md)
{
        if(md->prev) {
                ModifierTypeInfo *mti = modifierType_getInfo(md->type);

                if(mti->type!=eModifierTypeType_OnlyDeform) {
                        ModifierTypeInfo *nmti = modifierType_getInfo(md->prev->type);

                        if(nmti->flags&eModifierTypeFlag_RequiresOriginalData) {
                                BKE_report(reports, RPT_WARNING, "Cannot move above a modifier requiring original data.");
                                return 0;
                        }
                }

                BLI_remlink(&ob->modifiers, md);
                BLI_insertlink(&ob->modifiers, md->prev->prev, md);
        }

        return 1;
}

int ED_object_modifier_move_down(ReportList *reports, Object *ob, ModifierData *md)
{
        if(md->next) {
                ModifierTypeInfo *mti = modifierType_getInfo(md->type);

                if(mti->flags&eModifierTypeFlag_RequiresOriginalData) {
                        ModifierTypeInfo *nmti = modifierType_getInfo(md->next->type);

                        if(nmti->type!=eModifierTypeType_OnlyDeform) {
                                BKE_report(reports, RPT_WARNING, "Cannot move beyond a non-deforming modifier.");
                                return 0;
                        }
                }

                BLI_remlink(&ob->modifiers, md);
                BLI_insertlink(&ob->modifiers, md->next, md);
        }

        return 1;
}

int ED_object_modifier_convert(ReportList *UNUSED(reports), Main *bmain, Scene *scene, Object *ob, ModifierData *md)
{
        Object *obn;
        ParticleSystem *psys;
        ParticleCacheKey *key, **cache;
        ParticleSettings *part;
        Mesh *me;
        MVert *mvert;
        MEdge *medge;
        int a, k, kmax;
        int totvert=0, totedge=0, cvert=0;
        int totpart=0, totchild=0;

        if(md->type != eModifierType_ParticleSystem) return 0;
        if(ob && ob->mode & OB_MODE_PARTICLE_EDIT) return 0;

        psys=((ParticleSystemModifierData *)md)->psys;
        part= psys->part;

        if(part->ren_as != PART_DRAW_PATH || psys->pathcache == NULL)
                return 0;

        totpart= psys->totcached;
        totchild= psys->totchildcache;

        if(totchild && (part->draw&PART_DRAW_PARENT)==0)
                totpart= 0;

        /* count */
        cache= psys->pathcache;
        for(a=0; a<totpart; a++) {
                key= cache[a];

                if(key->steps > 0) {
                        totvert+= key->steps+1;
                        totedge+= key->steps;
                }
        }

        cache= psys->childcache;
        for(a=0; a<totchild; a++) {
                key= cache[a];

                if(key->steps > 0) {
                        totvert+= key->steps+1;
                        totedge+= key->steps;
                }
        }

        if(totvert==0) return 0;

        /* add new mesh */
        obn= add_object(scene, OB_MESH);
        me= obn->data;
        
        me->totvert= totvert;
        me->totedge= totedge;
        
        me->mvert= CustomData_add_layer(&me->vdata, CD_MVERT, CD_CALLOC, NULL, totvert);
        me->medge= CustomData_add_layer(&me->edata, CD_MEDGE, CD_CALLOC, NULL, totedge);
        me->mface= CustomData_add_layer(&me->fdata, CD_MFACE, CD_CALLOC, NULL, 0);
        
        mvert= me->mvert;
        medge= me->medge;

        /* copy coordinates */
        cache= psys->pathcache;
        for(a=0; a<totpart; a++) {
                key= cache[a];
                kmax= key->steps;
                for(k=0; k<=kmax; k++,key++,cvert++,mvert++) {
                        VECCOPY(mvert->co,key->co);
                        if(k) {
                                medge->v1= cvert-1;
                                medge->v2= cvert;
                                medge->flag= ME_EDGEDRAW|ME_EDGERENDER|ME_LOOSEEDGE;
                                medge++;
                        }
                        else {
                                /* cheap trick to select the roots */
                                mvert->flag |= SELECT;
                        }
                }
        }

        cache=psys->childcache;
        for(a=0; a<totchild; a++) {
                key=cache[a];
                kmax=key->steps;
                for(k=0; k<=kmax; k++,key++,cvert++,mvert++) {
                        VECCOPY(mvert->co,key->co);
                        if(k) {
                                medge->v1=cvert-1;
                                medge->v2=cvert;
                                medge->flag= ME_EDGEDRAW|ME_EDGERENDER|ME_LOOSEEDGE;
                                medge++;
                        }
                        else {
                                /* cheap trick to select the roots */
                                mvert->flag |= SELECT;
                        }
                }
        }

        DAG_scene_sort(bmain, scene);

        return 1;
}

static int modifier_apply_shape(ReportList *reports, Scene *scene, Object *ob, ModifierData *md)
{
        ModifierTypeInfo *mti= modifierType_getInfo(md->type);

        md->scene= scene;

        if (mti->isDisabled && mti->isDisabled(md, 0)) {
                BKE_report(reports, RPT_ERROR, "Modifier is disabled, skipping apply");
                return 0;
        }

        if (ob->type==OB_MESH) {
                DerivedMesh *dm;
                Mesh *me= ob->data;
                Key *key=me->key;
                KeyBlock *kb;
                
                if(!modifier_sameTopology(md)) {
                        BKE_report(reports, RPT_ERROR, "Only deforming modifiers can be applied to Shapes");
                        return 0;
                }
                mesh_pmv_off(me);
                
                dm = mesh_create_derived_for_modifier(scene, ob, md);
                if (!dm) {
                        BKE_report(reports, RPT_ERROR, "Modifier is disabled or returned error, skipping apply");
                        return 0;
                }
                
                if(key == NULL) {
                        key= me->key= add_key((ID *)me);
                        key->type= KEY_RELATIVE;
                        /* if that was the first key block added, then it was the basis.
                         * Initialise it with the mesh, and add another for the modifier */
                        kb= add_keyblock(key, NULL);
                        mesh_to_key(me, kb);
                }

                kb= add_keyblock(key, md->name);
                DM_to_meshkey(dm, me, kb);
                
                dm->release(dm);
        }
        else {
                BKE_report(reports, RPT_ERROR, "Cannot apply modifier for this object type");
                return 0;
        }
        return 1;
}

static int modifier_apply_obdata(ReportList *reports, Scene *scene, Object *ob, ModifierData *md)
{
        ModifierTypeInfo *mti= modifierType_getInfo(md->type);

        md->scene= scene;

        if (mti->isDisabled && mti->isDisabled(md, 0)) {
                BKE_report(reports, RPT_ERROR, "Modifier is disabled, skipping apply");
                return 0;
        }

        if (ob->type==OB_MESH) {
                DerivedMesh *dm;
                Mesh *me = ob->data;
                MultiresModifierData *mmd= find_multires_modifier_before(scene, md);

                if( me->key) {
                        BKE_report(reports, RPT_ERROR, "Modifier cannot be applied to Mesh with Shape Keys");
                        return 0;
                }

                mesh_pmv_off(me);

                /* Multires: ensure that recent sculpting is applied */
                if(md->type == eModifierType_Multires)
                        multires_force_update(ob);

                if (mmd && mmd->totlvl && mti->type==eModifierTypeType_OnlyDeform) {
                        if(!multiresModifier_reshapeFromDeformMod (scene, mmd, ob, md)) {
                                BKE_report(reports, RPT_ERROR, "Multires modifier returned error, skipping apply");
                                return 0;
                        }
                } else {
                        dm = mesh_create_derived_for_modifier(scene, ob, md);
                        if (!dm) {
                                BKE_report(reports, RPT_ERROR, "Modifier returned error, skipping apply");
                                return 0;
                        }

                        DM_to_mesh(dm, me);

                        dm->release(dm);

                        if(md->type == eModifierType_Multires) {
                                CustomData_external_remove(&me->fdata, &me->id, CD_MDISPS, me->totface);
                                CustomData_free_layer_active(&me->fdata, CD_MDISPS, me->totface);
                        }
                }
        }
        else if (ELEM(ob->type, OB_CURVE, OB_SURF)) {
                Curve *cu;
                int numVerts;
                float (*vertexCos)[3];

                if (mti->type==eModifierTypeType_Constructive) {
                        BKE_report(reports, RPT_ERROR, "Cannot apply constructive modifiers on curve");
                        return 0;
                }

                cu = ob->data;
                BKE_report(reports, RPT_INFO, "Applied modifier only changed CV points, not tesselated/bevel vertices");

                vertexCos = curve_getVertexCos(cu, &cu->nurb, &numVerts);
                mti->deformVerts(md, ob, NULL, vertexCos, numVerts, 0, 0);
                curve_applyVertexCos(cu, &cu->nurb, vertexCos);

                MEM_freeN(vertexCos);

                DAG_id_tag_update(&ob->id, OB_RECALC_DATA);
        }
        else {
                BKE_report(reports, RPT_ERROR, "Cannot apply modifier for this object type");
                return 0;
        }

        /* lattice modifier can be applied to particle system too */
        if(ob->particlesystem.first) {

                ParticleSystem *psys = ob->particlesystem.first;

                for(; psys; psys=psys->next) {
                        
                        if(psys->part->type != PART_HAIR)
                                continue;

                        psys_apply_hair_lattice(scene, ob, psys);
                }
        }

        return 1;
}

int ED_object_modifier_apply(ReportList *reports, Scene *scene, Object *ob, ModifierData *md, int mode)
{
        int prev_mode;

        if (scene->obedit) {
                BKE_report(reports, RPT_ERROR, "Modifiers cannot be applied in editmode");
                return 0;
        } else if (((ID*) ob->data)->us>1) {
                BKE_report(reports, RPT_ERROR, "Modifiers cannot be applied to multi-user data");
                return 0;
        }

        if (md!=ob->modifiers.first)
                BKE_report(reports, RPT_INFO, "Applied modifier was not first, result may not be as expected.");

        /* allow apply of a not-realtime modifier, by first re-enabling realtime. */
        prev_mode= md->mode;
        md->mode |= eModifierMode_Realtime;

        if (mode == MODIFIER_APPLY_SHAPE) {
                if (!modifier_apply_shape(reports, scene, ob, md)) {
                        md->mode= prev_mode;
                        return 0;
                }
        } else {
                if (!modifier_apply_obdata(reports, scene, ob, md)) {
                        md->mode= prev_mode;
                        return 0;
                }
        }

        BLI_remlink(&ob->modifiers, md);
        modifier_free(md);

        return 1;
}

int ED_object_modifier_copy(ReportList *UNUSED(reports), Object *ob, ModifierData *md)
{
        ModifierData *nmd;
        
        nmd = modifier_new(md->type);
        modifier_copyData(md, nmd);
        BLI_insertlink(&ob->modifiers, md, nmd);
        modifier_unique_name(&ob->modifiers, nmd);

        return 1;
}

/************************ add modifier operator *********************/

static int modifier_add_exec(bContext *C, wmOperator *op)
{
        Main *bmain= CTX_data_main(C);
        Scene *scene= CTX_data_scene(C);
        Object *ob = ED_object_active_context(C);
        int type= RNA_enum_get(op->ptr, "type");

        if(!ED_object_modifier_add(op->reports, bmain, scene, ob, NULL, type))
                return OPERATOR_CANCELLED;

        WM_event_add_notifier(C, NC_OBJECT|ND_MODIFIER, ob);
        
        return OPERATOR_FINISHED;
}

static EnumPropertyItem *modifier_add_itemf(bContext *C, PointerRNA *UNUSED(ptr), PropertyRNA *UNUSED(prop), int *free)
{       
        Object *ob= ED_object_active_context(C);
        EnumPropertyItem *item= NULL, *md_item;
        ModifierTypeInfo *mti;
        int totitem= 0, a;
        
        if(!ob)
                return modifier_type_items;

        for(a=0; modifier_type_items[a].identifier; a++) {
                md_item= &modifier_type_items[a];

                if(md_item->identifier[0]) {
                        mti= modifierType_getInfo(md_item->value);

                        if(mti->flags & eModifierTypeFlag_NoUserAdd)
                                continue;

                        if(!((mti->flags & eModifierTypeFlag_AcceptsCVs) ||
                           (ob->type==OB_MESH && (mti->flags & eModifierTypeFlag_AcceptsMesh))))
                                continue;
                }

                RNA_enum_item_add(&item, &totitem, md_item);
        }

        RNA_enum_item_end(&item, &totitem);
        *free= 1;

        return item;
}

void OBJECT_OT_modifier_add(wmOperatorType *ot)
{
        PropertyRNA *prop;

        /* identifiers */
        ot->name= "Add Modifier";
        ot->description = "Add a modifier to the active object";
        ot->idname= "OBJECT_OT_modifier_add";
        
        /* api callbacks */
        ot->invoke= WM_menu_invoke;
        ot->exec= modifier_add_exec;
        ot->poll= ED_operator_object_active_editable;
        
        /* flags */
        ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
        
        /* properties */
        prop= RNA_def_enum(ot->srna, "type", modifier_type_items, eModifierType_Subsurf, "Type", "");
        RNA_def_enum_funcs(prop, modifier_add_itemf);
        ot->prop= prop;
}

/************************ generic functions for operators using mod names and data context *********************/

static int edit_modifier_poll_generic(bContext *C, StructRNA *rna_type, int obtype_flag)
{
        PointerRNA ptr= CTX_data_pointer_get_type(C, "modifier", rna_type);
        Object *ob= (ptr.id.data)?ptr.id.data:ED_object_active_context(C);
        
        if (!ob || ob->id.lib) return 0;
        if (obtype_flag && ((1<<ob->type) & obtype_flag)==0) return 0;
        if (ptr.id.data && ((ID*)ptr.id.data)->lib) return 0;
        
        return 1;
}

static int edit_modifier_poll(bContext *C)
{
        return edit_modifier_poll_generic(C, &RNA_Modifier, 0);
}

static void edit_modifier_properties(wmOperatorType *ot)
{
        RNA_def_string(ot->srna, "modifier", "", 32, "Modifier", "Name of the modifier to edit");
}

static int edit_modifier_invoke_properties(bContext *C, wmOperator *op)
{
        PointerRNA ptr= CTX_data_pointer_get_type(C, "modifier", &RNA_Modifier);
        ModifierData *md;
        
        if (RNA_property_is_set(op->ptr, "modifier"))
                return 1;
        
        if (ptr.data) {
                md = ptr.data;
                RNA_string_set(op->ptr, "modifier", md->name);
                return 1;
        }
        
        return 0;
}

static ModifierData *edit_modifier_property_get(wmOperator *op, Object *ob, int type)
{
        char modifier_name[32];
        ModifierData *md;
        RNA_string_get(op->ptr, "modifier", modifier_name);
        
        md = modifiers_findByName(ob, modifier_name);
        
        if (md && type != 0 && md->type != type)
                md = NULL;

        return md;
}

/************************ remove modifier operator *********************/

static int modifier_remove_exec(bContext *C, wmOperator *op)
{
        Main *bmain= CTX_data_main(C);
        Scene *scene= CTX_data_scene(C);
        Object *ob = ED_object_active_context(C);
        ModifierData *md = edit_modifier_property_get(op, ob, 0);
        int mode_orig = ob->mode;
        
        if(!ob || !md || !ED_object_modifier_remove(op->reports, bmain, scene, ob, md))
                return OPERATOR_CANCELLED;

        WM_event_add_notifier(C, NC_OBJECT|ND_MODIFIER, ob);

        /* if cloth/softbody was removed, particle mode could be cleared */
        if(mode_orig & OB_MODE_PARTICLE_EDIT)
                if((ob->mode & OB_MODE_PARTICLE_EDIT)==0)
                        if(scene->basact && scene->basact->object==ob)
                                WM_event_add_notifier(C, NC_SCENE|ND_MODE|NS_MODE_OBJECT, NULL);
        
        return OPERATOR_FINISHED;
}

static int modifier_remove_invoke(bContext *C, wmOperator *op, wmEvent *UNUSED(event))
{
        if (edit_modifier_invoke_properties(C, op))
                return modifier_remove_exec(C, op);
        else
                return OPERATOR_CANCELLED;
}

void OBJECT_OT_modifier_remove(wmOperatorType *ot)
{
        ot->name= "Remove Modifier";
        ot->description= "Remove a modifier from the active object";
        ot->idname= "OBJECT_OT_modifier_remove";

        ot->invoke= modifier_remove_invoke;
        ot->exec= modifier_remove_exec;
        ot->poll= edit_modifier_poll;
        
        /* flags */
        ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
        edit_modifier_properties(ot);
}

/************************ move up modifier operator *********************/

static int modifier_move_up_exec(bContext *C, wmOperator *op)
{
        Object *ob = ED_object_active_context(C);
        ModifierData *md = edit_modifier_property_get(op, ob, 0);

        if(!ob || !md || !ED_object_modifier_move_up(op->reports, ob, md))
                return OPERATOR_CANCELLED;

        DAG_id_tag_update(&ob->id, OB_RECALC_DATA);
        WM_event_add_notifier(C, NC_OBJECT|ND_MODIFIER, ob);
        
        return OPERATOR_FINISHED;
}

static int modifier_move_up_invoke(bContext *C, wmOperator *op, wmEvent *UNUSED(event))
{
        if (edit_modifier_invoke_properties(C, op))
                return modifier_move_up_exec(C, op);
        else
                return OPERATOR_CANCELLED;
}

void OBJECT_OT_modifier_move_up(wmOperatorType *ot)
{
        ot->name= "Move Up Modifier";
        ot->description= "Move modifier up in the stack";
        ot->idname= "OBJECT_OT_modifier_move_up";

        ot->invoke= modifier_move_up_invoke;
        ot->exec= modifier_move_up_exec;
        ot->poll= edit_modifier_poll;
        
        /* flags */
        ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
        edit_modifier_properties(ot);
}

/************************ move down modifier operator *********************/

static int modifier_move_down_exec(bContext *C, wmOperator *op)
{
        Object *ob = ED_object_active_context(C);
        ModifierData *md = edit_modifier_property_get(op, ob, 0);

        if(!ob || !md || !ED_object_modifier_move_down(op->reports, ob, md))
                return OPERATOR_CANCELLED;

        DAG_id_tag_update(&ob->id, OB_RECALC_DATA);
        WM_event_add_notifier(C, NC_OBJECT|ND_MODIFIER, ob);
        
        return OPERATOR_FINISHED;
}

static int modifier_move_down_invoke(bContext *C, wmOperator *op, wmEvent *UNUSED(event))
{
        if (edit_modifier_invoke_properties(C, op))
                return modifier_move_down_exec(C, op);
        else
                return OPERATOR_CANCELLED;
}

void OBJECT_OT_modifier_move_down(wmOperatorType *ot)
{
        ot->name= "Move Down Modifier";
        ot->description= "Move modifier down in the stack";
        ot->idname= "OBJECT_OT_modifier_move_down";

        ot->invoke= modifier_move_down_invoke;
        ot->exec= modifier_move_down_exec;
        ot->poll= edit_modifier_poll;
        
        /* flags */
        ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
        edit_modifier_properties(ot);
}

/************************ apply modifier operator *********************/

static int modifier_apply_exec(bContext *C, wmOperator *op)
{
        Scene *scene= CTX_data_scene(C);
        Object *ob = ED_object_active_context(C);
        ModifierData *md = edit_modifier_property_get(op, ob, 0);
        int apply_as= RNA_enum_get(op->ptr, "apply_as");
        
        if(!ob || !md || !ED_object_modifier_apply(op->reports, scene, ob, md, apply_as)) {
                return OPERATOR_CANCELLED;
        }

        DAG_id_tag_update(&ob->id, OB_RECALC_DATA);
        WM_event_add_notifier(C, NC_OBJECT|ND_MODIFIER, ob);
        
        return OPERATOR_FINISHED;
}

static int modifier_apply_invoke(bContext *C, wmOperator *op, wmEvent *UNUSED(event))
{
        if (edit_modifier_invoke_properties(C, op))
                return modifier_apply_exec(C, op);
        else
                return OPERATOR_CANCELLED;
}

static EnumPropertyItem modifier_apply_as_items[] = {
        {MODIFIER_APPLY_DATA, "DATA", 0, "Object Data", "Apply modifier to the object's data"},
        {MODIFIER_APPLY_SHAPE, "SHAPE", 0, "New Shape", "Apply deform-only modifier to a new shape on this object"},
        {0, NULL, 0, NULL, NULL}};

void OBJECT_OT_modifier_apply(wmOperatorType *ot)
{
        ot->name= "Apply Modifier";
        ot->description= "Apply modifier and remove from the stack";
        ot->idname= "OBJECT_OT_modifier_apply";

        ot->invoke= modifier_apply_invoke;
        ot->exec= modifier_apply_exec;
        ot->poll= edit_modifier_poll;
        
        /* flags */
        ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
        
        RNA_def_enum(ot->srna, "apply_as", modifier_apply_as_items, MODIFIER_APPLY_DATA, "Apply as", "How to apply the modifier to the geometry");
        edit_modifier_properties(ot);
}

/************************ convert modifier operator *********************/

static int modifier_convert_exec(bContext *C, wmOperator *op)
{
        Main *bmain= CTX_data_main(C);
        Scene *scene= CTX_data_scene(C);
        Object *ob = ED_object_active_context(C);
        ModifierData *md = edit_modifier_property_get(op, ob, 0);
        
        if(!ob || !md || !ED_object_modifier_convert(op->reports, bmain, scene, ob, md))
                return OPERATOR_CANCELLED;

        DAG_id_tag_update(&ob->id, OB_RECALC_DATA);
        WM_event_add_notifier(C, NC_OBJECT|ND_MODIFIER, ob);
        
        return OPERATOR_FINISHED;
}

static int modifier_convert_invoke(bContext *C, wmOperator *op, wmEvent *UNUSED(event))
{
        if (edit_modifier_invoke_properties(C, op))
                return modifier_convert_exec(C, op);
        else
                return OPERATOR_CANCELLED;
}

void OBJECT_OT_modifier_convert(wmOperatorType *ot)
{
        ot->name= "Convert Modifier";
        ot->description= "Convert particles to a mesh object";
        ot->idname= "OBJECT_OT_modifier_convert";

        ot->invoke= modifier_convert_invoke;
        ot->exec= modifier_convert_exec;
        ot->poll= edit_modifier_poll;
        
        /* flags */
        ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
        edit_modifier_properties(ot);
}

/************************ copy modifier operator *********************/

static int modifier_copy_exec(bContext *C, wmOperator *op)
{
        Object *ob = ED_object_active_context(C);
        ModifierData *md = edit_modifier_property_get(op, ob, 0);

        if(!ob || !md || !ED_object_modifier_copy(op->reports, ob, md))
                return OPERATOR_CANCELLED;

        DAG_id_tag_update(&ob->id, OB_RECALC_DATA);
        WM_event_add_notifier(C, NC_OBJECT|ND_MODIFIER, ob);
        
        return OPERATOR_FINISHED;
}

static int modifier_copy_invoke(bContext *C, wmOperator *op, wmEvent *UNUSED(event))
{
        if (edit_modifier_invoke_properties(C, op))
                return modifier_copy_exec(C, op);
        else
                return OPERATOR_CANCELLED;
}

void OBJECT_OT_modifier_copy(wmOperatorType *ot)
{
        ot->name= "Copy Modifier";
        ot->description= "Duplicate modifier at the same position in the stack";
        ot->idname= "OBJECT_OT_modifier_copy";

        ot->invoke= modifier_copy_invoke;
        ot->exec= modifier_copy_exec;
        ot->poll= edit_modifier_poll;
        
        /* flags */
        ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
        edit_modifier_properties(ot);
}

/************* multires delete higher levels operator ****************/

static int multires_poll(bContext *C)
{
        return edit_modifier_poll_generic(C, &RNA_MultiresModifier, (1<<OB_MESH));
}

static int multires_higher_levels_delete_exec(bContext *C, wmOperator *op)
{
        Object *ob = ED_object_active_context(C);
        MultiresModifierData *mmd = (MultiresModifierData *)edit_modifier_property_get(op, ob, eModifierType_Multires);
        
        if (!mmd)
                return OPERATOR_CANCELLED;
        
        multiresModifier_del_levels(mmd, ob, 1);
        
        WM_event_add_notifier(C, NC_OBJECT|ND_MODIFIER, ob);
        
        return OPERATOR_FINISHED;
}

static int multires_higher_levels_delete_invoke(bContext *C, wmOperator *op, wmEvent *UNUSED(event))
{
        if (edit_modifier_invoke_properties(C, op))
                return multires_higher_levels_delete_exec(C, op);
        else
                return OPERATOR_CANCELLED;
}

void OBJECT_OT_multires_higher_levels_delete(wmOperatorType *ot)
{
        ot->name= "Delete Higher Levels";
        ot->description= "Deletes the higher resolution mesh, potential loss of detail";
        ot->idname= "OBJECT_OT_multires_higher_levels_delete";

        ot->poll= multires_poll;
        ot->invoke= multires_higher_levels_delete_invoke;
        ot->exec= multires_higher_levels_delete_exec;
        
        /* flags */
        ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
        edit_modifier_properties(ot);
}

/****************** multires subdivide operator *********************/

static int multires_subdivide_exec(bContext *C, wmOperator *op)
{
        Object *ob = ED_object_active_context(C);
        MultiresModifierData *mmd = (MultiresModifierData *)edit_modifier_property_get(op, ob, eModifierType_Multires);
        
        if (!mmd)
                return OPERATOR_CANCELLED;
        
        multiresModifier_subdivide(mmd, ob, 0, mmd->simple);

        DAG_id_tag_update(&ob->id, OB_RECALC_DATA);
        WM_event_add_notifier(C, NC_OBJECT|ND_MODIFIER, ob);
        
        return OPERATOR_FINISHED;
}

static int multires_subdivide_invoke(bContext *C, wmOperator *op, wmEvent *UNUSED(event))
{
        if (edit_modifier_invoke_properties(C, op))
                return multires_subdivide_exec(C, op);
        else
                return OPERATOR_CANCELLED;
}

void OBJECT_OT_multires_subdivide(wmOperatorType *ot)
{
        ot->name= "Multires Subdivide";
        ot->description= "Add a new level of subdivision";
        ot->idname= "OBJECT_OT_multires_subdivide";

        ot->poll= multires_poll;
        ot->invoke= multires_subdivide_invoke;
        ot->exec= multires_subdivide_exec;
        
        /* flags */
        ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
        edit_modifier_properties(ot);
}

/****************** multires reshape operator *********************/

static int multires_reshape_exec(bContext *C, wmOperator *op)
{
        Object *ob= ED_object_active_context(C), *secondob= NULL;
        Scene *scene= CTX_data_scene(C);
        MultiresModifierData *mmd = (MultiresModifierData *)edit_modifier_property_get(op, ob, eModifierType_Multires);

        if (!mmd)
                return OPERATOR_CANCELLED;
        
        CTX_DATA_BEGIN(C, Object*, selob, selected_editable_objects) {
                if(selob->type == OB_MESH && selob != ob) {
                        secondob= selob;
                        break;
                }
        }
        CTX_DATA_END;

        if(!secondob) {
                BKE_report(op->reports, RPT_ERROR, "Second selected mesh object require to copy shape from.");
                return OPERATOR_CANCELLED;
        }

        if(!multiresModifier_reshape(scene, mmd, ob, secondob)) {
                BKE_report(op->reports, RPT_ERROR, "Objects do not have the same number of vertices.");
                return OPERATOR_CANCELLED;
        }

        DAG_id_tag_update(&ob->id, OB_RECALC_DATA);
        WM_event_add_notifier(C, NC_OBJECT|ND_MODIFIER, ob);

        return OPERATOR_FINISHED;
}

static int multires_reshape_invoke(bContext *C, wmOperator *op, wmEvent *UNUSED(event))
{
        if (edit_modifier_invoke_properties(C, op))
                return multires_reshape_exec(C, op);
        else
                return OPERATOR_CANCELLED;
}

void OBJECT_OT_multires_reshape(wmOperatorType *ot)
{
        ot->name= "Multires Reshape";
        ot->description= "Copy vertex coordinates from other object";
        ot->idname= "OBJECT_OT_multires_reshape";

        ot->poll= multires_poll;
        ot->invoke= multires_reshape_invoke;
        ot->exec= multires_reshape_exec;
        
        /* flags */
        ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
        edit_modifier_properties(ot);
}

/****************** multires save external operator *********************/

static int multires_external_save_exec(bContext *C, wmOperator *op)
{
        Object *ob = ED_object_active_context(C);
        Mesh *me= (ob)? ob->data: op->customdata;
        char path[FILE_MAX];
        int relative= RNA_boolean_get(op->ptr, "relative_path");

        if(!me)
                return OPERATOR_CANCELLED;

        if(CustomData_external_test(&me->fdata, CD_MDISPS))
                return OPERATOR_CANCELLED;
        
        RNA_string_get(op->ptr, "filepath", path);

        if(relative)
                BLI_path_rel(path, G.main->name);

        CustomData_external_add(&me->fdata, &me->id, CD_MDISPS, me->totface, path);
        CustomData_external_write(&me->fdata, &me->id, CD_MASK_MESH, me->totface, 0);
        
        return OPERATOR_FINISHED;
}

static int multires_external_save_invoke(bContext *C, wmOperator *op, wmEvent *UNUSED(event))
{
        Object *ob = ED_object_active_context(C);
        MultiresModifierData *mmd;
        Mesh *me= ob->data;
        char path[FILE_MAX];

        if (!edit_modifier_invoke_properties(C, op))
                return OPERATOR_CANCELLED;
        
        mmd = (MultiresModifierData *)edit_modifier_property_get(op, ob, eModifierType_Multires);
        
        if (!mmd)
                return OPERATOR_CANCELLED;
        
        if(CustomData_external_test(&me->fdata, CD_MDISPS))
                return OPERATOR_CANCELLED;

        if(!RNA_property_is_set(op->ptr, "relative_path"))
                RNA_boolean_set(op->ptr, "relative_path", U.flag & USER_RELPATHS);

        if(RNA_property_is_set(op->ptr, "filepath"))
                return multires_external_save_exec(C, op);
        
        op->customdata= me;

        BLI_snprintf(path, sizeof(path), "//%s.btx", me->id.name+2);
        RNA_string_set(op->ptr, "filepath", path);
        
        WM_event_add_fileselect(C, op);

        return OPERATOR_RUNNING_MODAL;
}

void OBJECT_OT_multires_external_save(wmOperatorType *ot)
{
        ot->name= "Multires Save External";
        ot->description= "Save displacements to an external file";
        ot->idname= "OBJECT_OT_multires_external_save";

        // XXX modifier no longer in context after file browser .. ot->poll= multires_poll;
        ot->exec= multires_external_save_exec;
        ot->invoke= multires_external_save_invoke;
        ot->poll= multires_poll;
        
        /* flags */
        ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;

        WM_operator_properties_filesel(ot, FOLDERFILE|BTXFILE, FILE_SPECIAL, FILE_SAVE, WM_FILESEL_FILEPATH|WM_FILESEL_RELPATH);
        edit_modifier_properties(ot);
}

/****************** multires pack operator *********************/

static int multires_external_pack_exec(bContext *C, wmOperator *UNUSED(op))
{
        Object *ob = ED_object_active_context(C);
        Mesh *me= ob->data;

        if(!CustomData_external_test(&me->fdata, CD_MDISPS))
                return OPERATOR_CANCELLED;

        // XXX don't remove..
        CustomData_external_remove(&me->fdata, &me->id, CD_MDISPS, me->totface);
        
        return OPERATOR_FINISHED;
}

void OBJECT_OT_multires_external_pack(wmOperatorType *ot)
{
        ot->name= "Multires Pack External";
        ot->description= "Pack displacements from an external file";
        ot->idname= "OBJECT_OT_multires_external_pack";

        ot->poll= multires_poll;
        ot->exec= multires_external_pack_exec;
        
        /* flags */
        ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
}

/********************* multires apply base ***********************/
static int multires_base_apply_exec(bContext *C, wmOperator *op)
{
        Object *ob = ED_object_active_context(C);
        MultiresModifierData *mmd = (MultiresModifierData *)edit_modifier_property_get(op, ob, eModifierType_Multires);
        
        if (!mmd)
                return OPERATOR_CANCELLED;
        
        multiresModifier_base_apply(mmd, ob);

        DAG_id_tag_update(&ob->id, OB_RECALC_DATA);
        WM_event_add_notifier(C, NC_OBJECT|ND_MODIFIER, ob);
        
        return OPERATOR_FINISHED;
}

static int multires_base_apply_invoke(bContext *C, wmOperator *op, wmEvent *UNUSED(event))
{
        if (edit_modifier_invoke_properties(C, op))
                return multires_base_apply_exec(C, op);
        else
                return OPERATOR_CANCELLED;
}


void OBJECT_OT_multires_base_apply(wmOperatorType *ot)
{
        ot->name= "Multires Apply Base";
        ot->description= "Modify the base mesh to conform to the displaced mesh";
        ot->idname= "OBJECT_OT_multires_base_apply";

        ot->poll= multires_poll;
        ot->invoke= multires_base_apply_invoke;
        ot->exec= multires_base_apply_exec;
        
        /* flags */
        ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
        edit_modifier_properties(ot);
}


/************************ mdef bind operator *********************/

static int meshdeform_poll(bContext *C)
{
        return edit_modifier_poll_generic(C, &RNA_MeshDeformModifier, (1<<OB_MESH));
}

static int meshdeform_bind_exec(bContext *C, wmOperator *op)
{
        Scene *scene= CTX_data_scene(C);
        Object *ob = ED_object_active_context(C);
        MeshDeformModifierData *mmd = (MeshDeformModifierData *)edit_modifier_property_get(op, ob, eModifierType_MeshDeform);
        
        if (!mmd)
                return OPERATOR_CANCELLED;

        if(mmd->bindcagecos) {
                if(mmd->bindcagecos) MEM_freeN(mmd->bindcagecos);
                if(mmd->dyngrid) MEM_freeN(mmd->dyngrid);
                if(mmd->dyninfluences) MEM_freeN(mmd->dyninfluences);
                if(mmd->bindinfluences) MEM_freeN(mmd->bindinfluences);
                if(mmd->bindoffsets) MEM_freeN(mmd->bindoffsets);
                if(mmd->dynverts) MEM_freeN(mmd->dynverts);
                if(mmd->bindweights) MEM_freeN(mmd->bindweights); /* deprecated */
                if(mmd->bindcos) MEM_freeN(mmd->bindcos); /* deprecated */

                mmd->bindcagecos= NULL;
                mmd->dyngrid= NULL;
                mmd->dyninfluences= NULL;
                mmd->bindoffsets= NULL;
                mmd->dynverts= NULL;
                mmd->bindweights= NULL; /* deprecated */
                mmd->bindcos= NULL; /* deprecated */
                mmd->totvert= 0;
                mmd->totcagevert= 0;
                mmd->totinfluence= 0;
                
                DAG_id_tag_update(&ob->id, OB_RECALC_DATA);
                WM_event_add_notifier(C, NC_OBJECT|ND_MODIFIER, ob);
        }
        else {
                DerivedMesh *dm;
                int mode= mmd->modifier.mode;

                /* force modifier to run, it will call binding routine */
                mmd->bindfunc= mesh_deform_bind;
                mmd->modifier.mode |= eModifierMode_Realtime;

                if(ob->type == OB_MESH) {
                        dm= mesh_create_derived_view(scene, ob, 0);
                        dm->release(dm);
                }
                else if(ob->type == OB_LATTICE) {
                        lattice_calc_modifiers(scene, ob);
                }
                else if(ob->type==OB_MBALL) {
                        makeDispListMBall(scene, ob);
                }
                else if(ELEM3(ob->type, OB_CURVE, OB_SURF, OB_FONT)) {
                        makeDispListCurveTypes(scene, ob, 0);
                }

                mmd->bindfunc= NULL;
                mmd->modifier.mode= mode;
        }
        
        return OPERATOR_FINISHED;
}

static int meshdeform_bind_invoke(bContext *C, wmOperator *op, wmEvent *UNUSED(event))
{
        if (edit_modifier_invoke_properties(C, op))
                return meshdeform_bind_exec(C, op);
        else 
                return OPERATOR_CANCELLED;
}

void OBJECT_OT_meshdeform_bind(wmOperatorType *ot)
{
        /* identifiers */
        ot->name= "Mesh Deform Bind";
        ot->description = "Bind mesh to cage in mesh deform modifier";
        ot->idname= "OBJECT_OT_meshdeform_bind";
        
        /* api callbacks */
        ot->poll= meshdeform_poll;
        ot->invoke= meshdeform_bind_invoke;
        ot->exec= meshdeform_bind_exec;
        
        /* flags */
        ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
        edit_modifier_properties(ot);
}

/****************** explode refresh operator *********************/

static int explode_poll(bContext *C)
{
        return edit_modifier_poll_generic(C, &RNA_ExplodeModifier, 0);
}

static int explode_refresh_exec(bContext *C, wmOperator *op)
{
        Object *ob = ED_object_active_context(C);
        ExplodeModifierData *emd = (ExplodeModifierData *)edit_modifier_property_get(op, ob, eModifierType_Explode);
        
        if (!emd)
                return OPERATOR_CANCELLED;

        emd->flag |= eExplodeFlag_CalcFaces;

        DAG_id_tag_update(&ob->id, OB_RECALC_DATA);
        WM_event_add_notifier(C, NC_OBJECT|ND_MODIFIER, ob);
        
        return OPERATOR_FINISHED;
}

static int explode_refresh_invoke(bContext *C, wmOperator *op, wmEvent *UNUSED(event))
{
        if (edit_modifier_invoke_properties(C, op))
                return explode_refresh_exec(C, op);
        else
                return OPERATOR_CANCELLED;
}


void OBJECT_OT_explode_refresh(wmOperatorType *ot)
{
        ot->name= "Explode Refresh";
        ot->description= "Refresh data in the Explode modifier";
        ot->idname= "OBJECT_OT_explode_refresh";

        ot->poll= explode_poll;
        ot->invoke= explode_refresh_invoke;
        ot->exec= explode_refresh_exec;
        
        /* flags */
        ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
        edit_modifier_properties(ot);
}