MOD_util.c 核心代码部分, 关于 ModifierTypeInfo 的定义可以在 BKE_modifier.h 中看到非常详细的定义

/*

* ***** 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): Your name

*

* ***** END GPL LICENSE BLOCK *****

*

*/

/** \file blender/modifiers/intern/MOD_scaling.c

* \ingroup modifiers

*/

#include "DNA_meshdata_types.h"

#include "BLI_math.h"

#include "BLI_utildefines.h"

#include "BLI_string.h"

#include "MEM_guardedalloc.h"

#include "BKE_cdderivedmesh.h"

#include "BKE_particle.h"

#include "BKE_deform.h"

#include "MOD_modifiertypes.h"

#include "MOD_util.h"

static void initData(ModifierData *md)

{

ScalingModifierData *smd = (ScalingModifierData *) md;

smd->scale = 1.0f;

}

static void copyData(ModifierData *md, ModifierData *target)

{

ScalingModifierData *smd = (ScalingModifierData *) md;

ScalingModifierData *tsmd = (ScalingModifierData *) target;

tsmd->scale = smd->scale;

}

static int isDisabled(ModifierData *md, int UNUSED(useRenderParams))

{

ScalingModifierData *smd = (ScalingModifierData *) md;

/* disable if modifier is 1.0 for scale*/

if (smd->scale == 1.0f) return 1;

return 0;

}

static CustomDataMask requiredDataMask(Object *UNUSED(ob), ModifierData *md)

{

ScalingModifierData *smd = (ScalingModifierData *)md;

CustomDataMask dataMask = 0;

return dataMask;

}

static void ScalingModifier_do(

ScalingModifierData *smd, Object *ob, DerivedMesh *dm,

float (*vertexCos)[3], int numVerts)

{

int i;

float scale;

scale = smd->scale;

for (i = 0; i < numVerts; i++) {

vertexCos[i][0] = vertexCos[i][0] * scale;

vertexCos[i][1] = vertexCos[i][1] * scale;

vertexCos[i][2] = vertexCos[i][2] * scale;

}

}

static void deformVerts(ModifierData *md, Object *ob, DerivedMesh *derivedData,

float (*vertexCos)[3], int numVerts, ModifierApplyFlag UNUSED(flag))

{

DerivedMesh *dm = get_dm(ob, NULL, derivedData, NULL, 0);

ScalingModifier_do((ScalingModifierData *)md, ob, dm,

vertexCos, numVerts);

if (dm != derivedData)

dm->release(dm);

}

static void deformVertsEM(

ModifierData *md, Object *ob, struct BMEditMesh *editData,

DerivedMesh *derivedData, float (*vertexCos)[3], int numVerts)

{

DerivedMesh *dm = get_dm(ob, editData, derivedData, NULL, 0);

ScalingModifier_do((ScalingModifierData *)md, ob, dm,

vertexCos, numVerts);

if (dm != derivedData)

dm->release(dm);

}

ModifierTypeInfo modifierType_Scaling = {

/* name */ "Scaling",

/* structName */ "ScalingModifierData",

/* structSize */ sizeof(ScalingModifierData),

/* type */ eModifierTypeType_OnlyDeform,

/* flags */ eModifierTypeFlag_AcceptsMesh |

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 */ NULL,

/* dependsOnTime */ NULL,

/* dependsOnNormals */ NULL,

/* foreachObjectLink */ NULL,

/* foreachIDLink */ NULL,

/* foreachTexLink */ NULL,

};