MOD_armature.c

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/*
* $Id: MOD_armature.c 36913 2011-05-26 10:21:09Z blendix $
*
* ***** 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_armature_types.h"
#include "DNA_object_types.h"
#include "DNA_mesh_types.h"

#include "BLI_utildefines.h"


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

#include "MEM_guardedalloc.h"

#include "depsgraph_private.h"

#include "MOD_util.h"


static void initData(ModifierData *md)
{
        ArmatureModifierData *amd = (ArmatureModifierData*) md;
        
        amd->deformflag = ARM_DEF_ENVELOPE | ARM_DEF_VGROUP;
}

static void copyData(ModifierData *md, ModifierData *target)
{
        ArmatureModifierData *amd = (ArmatureModifierData*) md;
        ArmatureModifierData *tamd = (ArmatureModifierData*) target;

        tamd->object = amd->object;
        tamd->deformflag = amd->deformflag;
        tamd->multi = amd->multi;
        strncpy(tamd->defgrp_name, amd->defgrp_name, 32);
}

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

        /* ask for vertexgroups */
        dataMask |= CD_MASK_MDEFORMVERT;

        return dataMask;
}

static int isDisabled(ModifierData *md, int UNUSED(useRenderParams))
{
        ArmatureModifierData *amd = (ArmatureModifierData*) md;

        return !amd->object;
}

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

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

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

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

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

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

        modifier_vgroup_cache(md, vertexCos); /* if next modifier needs original vertices */
        
        armature_deform_verts(amd->object, ob, derivedData, vertexCos, NULL,
                numVerts, amd->deformflag, (float(*)[3])amd->prevCos, amd->defgrp_name);

        /* free cache */
        if(amd->prevCos) {
                MEM_freeN(amd->prevCos);
                amd->prevCos= NULL;
        }
}

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

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

        modifier_vgroup_cache(md, vertexCos); /* if next modifier needs original vertices */

        armature_deform_verts(amd->object, ob, dm, vertexCos, NULL,
                numVerts, amd->deformflag, (float(*)[3])amd->prevCos, amd->defgrp_name);

        /* free cache */
        if(amd->prevCos) {
                MEM_freeN(amd->prevCos);
                amd->prevCos= NULL;
        }

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

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

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

        armature_deform_verts(amd->object, ob, dm, vertexCos, defMats, numVerts,
                                  amd->deformflag, NULL, amd->defgrp_name);

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

static void deformMatrices(ModifierData *md, Object *ob, DerivedMesh *derivedData,
                                                   float (*vertexCos)[3], float (*defMats)[3][3], int numVerts)
{
        ArmatureModifierData *amd = (ArmatureModifierData*) md;
        DerivedMesh *dm = derivedData;

        if(!derivedData) dm = CDDM_from_mesh((Mesh*)ob->data, ob);

        armature_deform_verts(amd->object, ob, dm, vertexCos, defMats, numVerts,
                                  amd->deformflag, NULL, amd->defgrp_name);

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

ModifierTypeInfo modifierType_Armature = {
        /* name */              "Armature",
        /* structName */        "ArmatureModifierData",
        /* structSize */        sizeof(ArmatureModifierData),
        /* type */              eModifierTypeType_OnlyDeform,
        /* flags */             eModifierTypeFlag_AcceptsCVs
                                                        | eModifierTypeFlag_SupportsEditmode,

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