MOD_subsurf.c

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/*
* $Id: MOD_subsurf.c 36777 2011-05-19 11:54:03Z 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 "DNA_scene_types.h"
#include "DNA_object_types.h"

#include "BLI_utildefines.h"


#include "BKE_cdderivedmesh.h"
#include "BKE_scene.h"
#include "BKE_subsurf.h"

#include "MOD_modifiertypes.h"

#include "CCGSubSurf.h"

static void initData(ModifierData *md)
{
        SubsurfModifierData *smd = (SubsurfModifierData*) md;

        smd->levels = 1;
        smd->renderLevels = 2;
        smd->flags |= eSubsurfModifierFlag_SubsurfUv;
}

static void copyData(ModifierData *md, ModifierData *target)
{
        SubsurfModifierData *smd = (SubsurfModifierData*) md;
        SubsurfModifierData *tsmd = (SubsurfModifierData*) target;

        tsmd->flags = smd->flags;
        tsmd->levels = smd->levels;
        tsmd->renderLevels = smd->renderLevels;
        tsmd->subdivType = smd->subdivType;
}

static void freeData(ModifierData *md)
{
        SubsurfModifierData *smd = (SubsurfModifierData*) md;

        if(smd->mCache) {
                ccgSubSurf_free(smd->mCache);
        }
        if(smd->emCache) {
                ccgSubSurf_free(smd->emCache);
        }
}

static int isDisabled(ModifierData *md, int useRenderParams)
{
        SubsurfModifierData *smd = (SubsurfModifierData*) md;
        int levels= (useRenderParams)? smd->renderLevels: smd->levels;

        return get_render_subsurf_level(&md->scene->r, levels) == 0;
}

static DerivedMesh *applyModifier(ModifierData *md, Object *ob,
                                                DerivedMesh *derivedData,
                                                int useRenderParams,
                                                int isFinalCalc)
{
        SubsurfModifierData *smd = (SubsurfModifierData*) md;
        DerivedMesh *result;

        result = subsurf_make_derived_from_derived(derivedData, smd,
                        useRenderParams, NULL, isFinalCalc, 0, (ob->flag & OB_MODE_EDIT));
        
        if(useRenderParams || !isFinalCalc) {
                DerivedMesh *cddm= CDDM_copy(result);
                result->release(result);
                result= cddm;
        }

        return result;
}

static DerivedMesh *applyModifierEM(ModifierData *md, Object *UNUSED(ob),
                                                struct EditMesh *UNUSED(editData),
                                                DerivedMesh *derivedData)
{
        SubsurfModifierData *smd = (SubsurfModifierData*) md;
        DerivedMesh *result;

        result = subsurf_make_derived_from_derived(derivedData, smd, 0,
                        NULL, 0, 1, 1);

        return result;
}


ModifierTypeInfo modifierType_Subsurf = {
        /* name */              "Subsurf",
        /* structName */        "SubsurfModifierData",
        /* structSize */        sizeof(SubsurfModifierData),
        /* type */              eModifierTypeType_Constructive,
        /* flags */             eModifierTypeFlag_AcceptsMesh
                                                        | eModifierTypeFlag_SupportsMapping
                                                        | eModifierTypeFlag_SupportsEditmode
                                                        | eModifierTypeFlag_EnableInEditmode
                                                        | eModifierTypeFlag_AcceptsCVs,

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