MOD_lattice.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 <string.h>

#include "DNA_object_types.h"

#include "BLI_utildefines.h"
#include "BLI_string.h"


#include "BKE_cdderivedmesh.h"
#include "BKE_lattice.h"
#include "BKE_modifier.h"

#include "depsgraph_private.h"

#include "MOD_util.h"


static void copyData(ModifierData *md, ModifierData *target)
{
    LatticeModifierData *lmd = (LatticeModifierData*) md;
    LatticeModifierData *tlmd = (LatticeModifierData*) target;

    tlmd->object = lmd->object;
    BLI_strncpy(tlmd->name, lmd->name, sizeof(tlmd->name));
}

static CustomDataMask requiredDataMask(Object *UNUSED(ob), ModifierData *md)
{
    LatticeModifierData *lmd = (LatticeModifierData *)md;
    CustomDataMask dataMask = 0;

    /* ask for vertexgroups if we need them */
    if(lmd->name[0]) dataMask |= CD_MASK_MDEFORMVERT;

    return dataMask;
}

static int isDisabled(ModifierData *md, int UNUSED(userRenderParams))
{
    LatticeModifierData *lmd = (LatticeModifierData*) md;

    return !lmd->object;
}

static void foreachObjectLink(
                          ModifierData *md, Object *ob,
       void (*walk)(void *userData, Object *ob, Object **obpoin),
          void *userData)
{
    LatticeModifierData *lmd = (LatticeModifierData*) md;

    walk(userData, ob, &lmd->object);
}

static void updateDepgraph(ModifierData *md, DagForest *forest,
                        struct Scene *UNUSED(scene),
                        Object *UNUSED(ob),
                        DagNode *obNode)
{
    LatticeModifierData *lmd = (LatticeModifierData*) md;

    if(lmd->object) {
        DagNode *latNode = dag_get_node(forest, lmd->object);

        dag_add_relation(forest, latNode, obNode,
                         DAG_RL_DATA_DATA | DAG_RL_OB_DATA, "Lattice Modifier");
    }
}

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


    modifier_vgroup_cache(md, vertexCos); /* if next modifier needs original vertices */
    
    lattice_deform_verts(lmd->object, ob, derivedData,
                         vertexCos, numVerts, lmd->name);
}

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

    if(!derivedData) dm = CDDM_from_editmesh(editData, ob->data);

    deformVerts(md, ob, dm, vertexCos, numVerts, 0, 0);

    if(!derivedData) dm->release(dm);
}


ModifierTypeInfo modifierType_Lattice = {
    /* name */              "Lattice",
    /* structName */        "LatticeModifierData",
    /* structSize */        sizeof(LatticeModifierData),
    /* type */              eModifierTypeType_OnlyDeform,
    /* flags */             eModifierTypeFlag_AcceptsCVs
                            | eModifierTypeFlag_SupportsEditmode,
    /* copyData */          copyData,
    /* deformVerts */       deformVerts,
    /* deformMatrices */    NULL,
    /* deformVertsEM */     deformVertsEM,
    /* deformMatricesEM */  NULL,
    /* applyModifier */     NULL,
    /* applyModifierEM */   NULL,
    /* initData */          NULL,
    /* requiredDataMask */  requiredDataMask,
    /* freeData */          NULL,
    /* isDisabled */        isDisabled,
    /* updateDepgraph */    updateDepgraph,
    /* dependsOnTime */     NULL,
    /* dependsOnNormals */  NULL,
    /* foreachObjectLink */ foreachObjectLink,
    /* foreachIDLink */     NULL,
    /* foreachTexLink */    NULL,
};