MOD_curve.c

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/*
* $Id: MOD_curve.c 35362 2011-03-05 10:29:10Z campbellbarton $
*
* ***** 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 "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;
        strncpy(tcmd->name, cmd->name, 32);
}

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,
};