MOD_multires.c

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/*
* $Id: MOD_multires.c 36432 2011-05-02 10:21:07Z 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) 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 <stddef.h>

#include "BKE_cdderivedmesh.h"
#include "BKE_multires.h"
#include "BKE_modifier.h"
#include "BKE_paint.h"
#include "BKE_particle.h"

#include "DNA_mesh_types.h"

#include "MOD_util.h"

static void initData(ModifierData *md)
{
        MultiresModifierData *mmd = (MultiresModifierData*)md;

        mmd->lvl = 0;
        mmd->sculptlvl = 0;
        mmd->renderlvl = 0;
        mmd->totlvl = 0;
}

static void copyData(ModifierData *md, ModifierData *target)
{
        MultiresModifierData *mmd = (MultiresModifierData*) md;
        MultiresModifierData *tmmd = (MultiresModifierData*) target;

        tmmd->lvl = mmd->lvl;
        tmmd->sculptlvl = mmd->sculptlvl;
        tmmd->renderlvl = mmd->renderlvl;
        tmmd->totlvl = mmd->totlvl;
        tmmd->simple = mmd->simple;
        tmmd->flags = mmd->flags;
}

static DerivedMesh *applyModifier(ModifierData *md, Object *ob, DerivedMesh *dm,
                                                   int useRenderParams, int isFinalCalc)
{
        SculptSession *ss= ob->sculpt;
        int sculpting= (ob->mode & OB_MODE_SCULPT) && ss;
        MultiresModifierData *mmd = (MultiresModifierData*)md;
        DerivedMesh *result;
        Mesh *me= (Mesh*)ob->data;

        if(mmd->totlvl) {
                if(!CustomData_get_layer(&me->fdata, CD_MDISPS)) {
                        /* multires always needs a displacement layer */
                        CustomData_add_layer(&me->fdata, CD_MDISPS, CD_CALLOC, NULL, me->totface);
                }
        }

        result = multires_dm_create_from_derived(mmd, 0, dm, ob, useRenderParams, isFinalCalc);

        if(result == dm)
                return dm;

        if(useRenderParams || !isFinalCalc) {
                DerivedMesh *cddm= CDDM_copy(result);
                result->release(result);
                result= cddm;
        }
        else if(sculpting) {
                /* would be created on the fly too, just nicer this
                   way on first stroke after e.g. switching levels */
                ss->pbvh= result->getPBVH(ob, result);
        }

        return result;
}


ModifierTypeInfo modifierType_Multires = {
        /* name */              "Multires",
        /* structName */        "MultiresModifierData",
        /* structSize */        sizeof(MultiresModifierData),
        /* type */              eModifierTypeType_Constructive,
        /* flags */             eModifierTypeFlag_AcceptsMesh
                                                        | eModifierTypeFlag_SupportsMapping
                                                        | eModifierTypeFlag_RequiresOriginalData,

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