MOD_subsurf.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 <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,
    /* foreachTexLink */    NULL,
};