MOD_curve.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_scene_types.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 initData(ModifierData *md)
{
    CurveModifierData *cmd = (CurveModifierData*) md;

    cmd->defaxis = MOD_CURVE_POSX;
}

static void copyData(ModifierData *md, ModifierData *target)
{
    CurveModifierData *cmd = (CurveModifierData*) md;
    CurveModifierData *tcmd = (CurveModifierData*) target;

    tcmd->defaxis = cmd->defaxis;
    tcmd->object = cmd->object;
    BLI_strncpy(tcmd->name, cmd->name, sizeof(tcmd->name));
}

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

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

    return dataMask;
}

static int isDisabled(ModifierData *md, int UNUSED(userRenderParams))
{
    CurveModifierData *cmd = (CurveModifierData*) md;

    return !cmd->object;
}

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

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

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

    if (cmd->object) {
        DagNode *curNode = dag_get_node(forest, cmd->object);

        dag_add_relation(forest, curNode, obNode,
                         DAG_RL_DATA_DATA | DAG_RL_OB_DATA, "Curve Modifier");
    }
}

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

    curve_deform_verts(md->scene, cmd->object, ob, derivedData, vertexCos, numVerts,
                       cmd->name, cmd->defaxis);
}

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_Curve = {
    /* name */              "Curve",
    /* structName */        "CurveModifierData",
    /* structSize */        sizeof(CurveModifierData),
    /* type */              eModifierTypeType_OnlyDeform,
    /* flags */             eModifierTypeFlag_AcceptsCVs
                            | eModifierTypeFlag_SupportsEditmode,

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