MOD_shapekey.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 "BLI_math.h"

#include "DNA_key_types.h"

#include "BLI_utildefines.h"


#include "BKE_cdderivedmesh.h"
#include "BKE_key.h"
#include "BKE_particle.h"

#include "MOD_modifiertypes.h"

#include "MEM_guardedalloc.h"

static void deformVerts(ModifierData *md, Object *ob,
                        DerivedMesh *UNUSED(derivedData),
                        float (*vertexCos)[3],
                        int numVerts,
                        int UNUSED(useRenderParams),
                        int UNUSED(isFinalCalc))
{
    KeyBlock *kb= ob_get_keyblock(ob);
    float (*deformedVerts)[3];

    if(kb && kb->totelem == numVerts) {
        deformedVerts= (float(*)[3])do_ob_key(md->scene, ob);
        if(deformedVerts) {
            memcpy(vertexCos, deformedVerts, sizeof(float)*3*numVerts);
            MEM_freeN(deformedVerts);
        }
    }
}

static void deformMatrices(ModifierData *md, Object *ob, DerivedMesh *derivedData,
                           float (*vertexCos)[3], float (*defMats)[3][3], int numVerts)
{
    Key *key= ob_get_key(ob);
    KeyBlock *kb= ob_get_keyblock(ob);
    float scale[3][3];

    (void)vertexCos; /* unused */

    if(kb && kb->totelem==numVerts && kb!=key->refkey) {
        int a;

        if(ob->shapeflag & OB_SHAPE_LOCK) scale_m3_fl(scale, 1);
        else scale_m3_fl(scale, kb->curval);

        for(a=0; a<numVerts; a++)
            copy_m3_m3(defMats[a], scale);
    }

    deformVerts(md, ob, derivedData, vertexCos, numVerts, 0, 0);
}

static void deformVertsEM(ModifierData *md, Object *ob,
                        struct EditMesh *UNUSED(editData),
                        DerivedMesh *derivedData,
                        float (*vertexCos)[3],
                        int numVerts)
{
    Key *key= ob_get_key(ob);

    if(key && key->type == KEY_RELATIVE)
        deformVerts(md, ob, derivedData, vertexCos, numVerts, 0, 0);
}

static void deformMatricesEM(ModifierData *UNUSED(md), Object *ob,
                        struct EditMesh *UNUSED(editData),
                        DerivedMesh *UNUSED(derivedData),
                        float (*vertexCos)[3],
                        float (*defMats)[3][3],
                        int numVerts)
{
    Key *key= ob_get_key(ob);
    KeyBlock *kb= ob_get_keyblock(ob);
    float scale[3][3];

    (void)vertexCos; /* unused */

    if(kb && kb->totelem==numVerts && kb!=key->refkey) {
        int a;
        scale_m3_fl(scale, kb->curval);

        for(a=0; a<numVerts; a++)
            copy_m3_m3(defMats[a], scale);
    }
}

ModifierTypeInfo modifierType_ShapeKey = {
    /* name */              "ShapeKey",
    /* structName */        "ShapeKeyModifierData",
    /* structSize */        sizeof(ShapeKeyModifierData),
    /* type */              eModifierTypeType_OnlyDeform,
    /* flags */             eModifierTypeFlag_AcceptsCVs
                            | eModifierTypeFlag_SupportsEditmode,

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