356 lines
13 KiB
C
356 lines
13 KiB
C
/*
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* $Id$
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*
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* ***** BEGIN GPL LICENSE BLOCK *****
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
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* All rights reserved.
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*
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* The Original Code is: all of this file.
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*
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* Contributor(s): none yet.
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*
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* ***** END GPL LICENSE BLOCK *****
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*/
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#ifndef BKE_MODIFIER_H
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#define BKE_MODIFIER_H
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/** \file BKE_modifier.h
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* \ingroup bke
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*/
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#include "DNA_modifier_types.h" /* needed for all enum typdefs */
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#include "BKE_customdata.h"
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struct ID;
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struct EditMesh;
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struct DerivedMesh;
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struct DagForest;
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struct DagNode;
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struct Object;
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struct Scene;
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struct ListBase;
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struct LinkNode;
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struct bArmature;
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struct ModifierData;
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typedef enum {
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/* Should not be used, only for None modifier type */
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eModifierTypeType_None,
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/* Modifier only does deformation, implies that modifier
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* type should have a valid deformVerts function. OnlyDeform
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* style modifiers implicitly accept either mesh or CV
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* input but should still declare flags appropriately.
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*/
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eModifierTypeType_OnlyDeform,
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eModifierTypeType_Constructive,
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eModifierTypeType_Nonconstructive,
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/* both deformVerts & applyModifier are valid calls
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* used for particles modifier that doesn't actually modify the object
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* unless it's a mesh and can be exploded -> curve can also emit particles
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*/
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eModifierTypeType_DeformOrConstruct,
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} ModifierTypeType;
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typedef enum {
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eModifierTypeFlag_AcceptsMesh = (1<<0),
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eModifierTypeFlag_AcceptsCVs = (1<<1),
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eModifierTypeFlag_SupportsMapping = (1<<2),
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eModifierTypeFlag_SupportsEditmode = (1<<3),
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/* For modifiers that support editmode this determines if the
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* modifier should be enabled by default in editmode. This should
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* only be used by modifiers that are relatively speedy and
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* also generally used in editmode, otherwise let the user enable
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* it by hand.
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*/
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eModifierTypeFlag_EnableInEditmode = (1<<4),
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/* For modifiers that require original data and so cannot
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* be placed after any non-deformative modifier.
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*/
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eModifierTypeFlag_RequiresOriginalData = (1<<5),
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/* For modifiers that support pointcache, so we can check to see if it has files we need to deal with
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*/
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eModifierTypeFlag_UsesPointCache = (1<<6),
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/* For physics modifiers, max one per type */
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eModifierTypeFlag_Single = (1<<7),
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/* Some modifier can't be added manually by user */
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eModifierTypeFlag_NoUserAdd = (1<<8)
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} ModifierTypeFlag;
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typedef void (*ObjectWalkFunc)(void *userData, struct Object *ob, struct Object **obpoin);
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typedef void (*IDWalkFunc)(void *userData, struct Object *ob, struct ID **idpoin);
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typedef struct ModifierTypeInfo {
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/* The user visible name for this modifier */
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char name[32];
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/* The DNA struct name for the modifier data type, used to
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* write the DNA data out.
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*/
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char structName[32];
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/* The size of the modifier data type, used by allocation. */
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int structSize;
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ModifierTypeType type;
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ModifierTypeFlag flags;
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/********************* Non-optional functions *********************/
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/* Copy instance data for this modifier type. Should copy all user
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* level settings to the target modifier.
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*/
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void (*copyData)(struct ModifierData *md, struct ModifierData *target);
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/********************* Deform modifier functions *********************/
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/* Only for deform types, should apply the deformation
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* to the given vertex array. If the deformer requires information from
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* the object it can obtain it from the derivedData argument if non-NULL,
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* and otherwise the ob argument.
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*/
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void (*deformVerts)(struct ModifierData *md, struct Object *ob,
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struct DerivedMesh *derivedData,
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float (*vertexCos)[3], int numVerts,
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int useRenderParams, int isFinalCalc);
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/* Like deformMatricesEM but called from object mode (for supporting modifiers in sculpt mode) */
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void (*deformMatrices)(
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struct ModifierData *md, struct Object *ob,
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struct DerivedMesh *derivedData,
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float (*vertexCos)[3], float (*defMats)[3][3], int numVerts);
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/* Like deformVerts but called during editmode (for supporting modifiers)
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*/
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void (*deformVertsEM)(
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struct ModifierData *md, struct Object *ob,
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struct EditMesh *editData, struct DerivedMesh *derivedData,
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float (*vertexCos)[3], int numVerts);
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/* Set deform matrix per vertex for crazyspace correction */
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void (*deformMatricesEM)(
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struct ModifierData *md, struct Object *ob,
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struct EditMesh *editData, struct DerivedMesh *derivedData,
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float (*vertexCos)[3], float (*defMats)[3][3], int numVerts);
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/********************* Non-deform modifier functions *********************/
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/* For non-deform types: apply the modifier and return a derived
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* data object (type is dependent on object type).
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*
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* The derivedData argument should always be non-NULL; the modifier
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* should read the object data from the derived object instead of the
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* actual object data.
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*
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* The useRenderParams argument indicates if the modifier is being
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* applied in the service of the renderer which may alter quality
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* settings.
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*
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* The isFinalCalc parameter indicates if the modifier is being
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* calculated for a final result or for something temporary
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* (like orcos). This is a hack at the moment, it is meant so subsurf
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* can know if it is safe to reuse its internal cache.
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*
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* The modifier may reuse the derivedData argument (i.e. return it in
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* modified form), but must not release it.
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*/
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struct DerivedMesh *(*applyModifier)(
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struct ModifierData *md, struct Object *ob,
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struct DerivedMesh *derivedData,
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int useRenderParams, int isFinalCalc);
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/* Like applyModifier but called during editmode (for supporting
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* modifiers).
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*
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* The derived object that is returned must support the operations that
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* are expected from editmode objects. The same qualifications regarding
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* derivedData apply as for applyModifier.
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*/
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struct DerivedMesh *(*applyModifierEM)(
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struct ModifierData *md, struct Object *ob,
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struct EditMesh *editData,
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struct DerivedMesh *derivedData);
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/********************* Optional functions *********************/
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/* Initialize new instance data for this modifier type, this function
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* should set modifier variables to their default values.
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*
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* This function is optional.
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*/
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void (*initData)(struct ModifierData *md);
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/* Should return a CustomDataMask indicating what data this
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* modifier needs. If (mask & (1 << (layer type))) != 0, this modifier
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* needs that custom data layer. This function's return value can change
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* depending on the modifier's settings.
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*
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* Note that this means extra data (e.g. vertex groups) - it is assumed
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* that all modifiers need mesh data and deform modifiers need vertex
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* coordinates.
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*
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* Note that this limits the number of custom data layer types to 32.
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*
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* If this function is not present or it returns 0, it is assumed that
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* no extra data is needed.
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*
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* This function is optional.
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*/
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CustomDataMask (*requiredDataMask)(struct Object *ob, struct ModifierData *md);
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/* Free internal modifier data variables, this function should
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* not free the md variable itself.
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*
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* This function is optional.
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*/
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void (*freeData)(struct ModifierData *md);
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/* Return a boolean value indicating if this modifier is able to be
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* calculated based on the modifier data. This is *not* regarding the
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* md->flag, that is tested by the system, this is just if the data
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* validates (for example, a lattice will return false if the lattice
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* object is not defined).
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*
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* This function is optional (assumes never disabled if not present).
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*/
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int (*isDisabled)(struct ModifierData *md, int userRenderParams);
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/* Add the appropriate relations to the DEP graph depending on the
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* modifier data.
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*
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* This function is optional.
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*/
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void (*updateDepgraph)(struct ModifierData *md, struct DagForest *forest, struct Scene *scene,
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struct Object *ob, struct DagNode *obNode);
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/* Should return true if the modifier needs to be recalculated on time
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* changes.
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*
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* This function is optional (assumes false if not present).
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*/
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int (*dependsOnTime)(struct ModifierData *md);
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/* True when a deform modifier uses normals, the requiredDataMask
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* cant be used here because that refers to a normal layer where as
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* in this case we need to know if the deform modifier uses normals.
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*
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* this is needed because applying 2 deform modifiers will give the
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* second modifier bogus normals.
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* */
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int (*dependsOnNormals)(struct ModifierData *md);
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/* Should call the given walk function on with a pointer to each Object
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* pointer that the modifier data stores. This is used for linking on file
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* load and for unlinking objects or forwarding object references.
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*
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* This function is optional.
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*/
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void (*foreachObjectLink)(struct ModifierData *md, struct Object *ob,
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ObjectWalkFunc walk, void *userData);
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/* Should call the given walk function with a pointer to each ID
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* pointer (i.e. each datablock pointer) that the modifier data
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* stores. This is used for linking on file load and for
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* unlinking datablocks or forwarding datablock references.
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*
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* This function is optional. If it is not present, foreachObjectLink
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* will be used.
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*/
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void (*foreachIDLink)(struct ModifierData *md, struct Object *ob,
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IDWalkFunc walk, void *userData);
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} ModifierTypeInfo;
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ModifierTypeInfo *modifierType_getInfo (ModifierType type);
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/* Modifier utility calls, do call through type pointer and return
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* default values if pointer is optional.
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*/
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struct ModifierData *modifier_new(int type);
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void modifier_free(struct ModifierData *md);
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void modifier_unique_name(struct ListBase *modifiers, struct ModifierData *md);
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void modifier_copyData(struct ModifierData *md, struct ModifierData *target);
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int modifier_dependsOnTime(struct ModifierData *md);
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int modifier_supportsMapping(struct ModifierData *md);
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int modifier_couldBeCage(struct Scene *scene, struct ModifierData *md);
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int modifier_isCorrectableDeformed(struct ModifierData *md);
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int modifier_sameTopology(ModifierData *md);
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int modifier_isEnabled(struct Scene *scene, struct ModifierData *md, int required_mode);
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void modifier_setError(struct ModifierData *md, const char *format, ...)
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#ifdef __GNUC__
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__attribute__ ((format (printf, 2, 3)))
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#endif
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;
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void modifiers_foreachObjectLink(struct Object *ob,
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ObjectWalkFunc walk,
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void *userData);
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void modifiers_foreachIDLink(struct Object *ob,
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IDWalkFunc walk,
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void *userData);
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struct ModifierData *modifiers_findByType(struct Object *ob, ModifierType type);
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struct ModifierData *modifiers_findByName(struct Object *ob, const char *name);
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void modifiers_clearErrors(struct Object *ob);
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int modifiers_getCageIndex(struct Scene *scene, struct Object *ob,
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int *lastPossibleCageIndex_r, int virtual_);
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int modifiers_isSoftbodyEnabled(struct Object *ob);
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int modifiers_isClothEnabled(struct Object *ob);
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int modifiers_isParticleEnabled(struct Object *ob);
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struct Object *modifiers_isDeformedByArmature(struct Object *ob);
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struct Object *modifiers_isDeformedByLattice(struct Object *ob);
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int modifiers_usesArmature(struct Object *ob, struct bArmature *arm);
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int modifiers_isCorrectableDeformed(struct Object *ob);
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void modifier_freeTemporaryData(struct ModifierData *md);
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int modifiers_indexInObject(struct Object *ob, struct ModifierData *md);
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/* Calculates and returns a linked list of CustomDataMasks indicating the
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* data required by each modifier in the stack pointed to by md for correct
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* evaluation, assuming the data indicated by dataMask is required at the
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* end of the stack.
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*/
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struct LinkNode *modifiers_calcDataMasks(struct Scene *scene,
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struct Object *ob,
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struct ModifierData *md,
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CustomDataMask dataMask,
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int required_mode);
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struct ModifierData *modifiers_getVirtualModifierList(struct Object *ob);
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/* ensure modifier correctness when changing ob->data */
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void test_object_modifiers(struct Object *ob);
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/* here for do_versions */
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void modifier_mdef_compact_influences(struct ModifierData *md);
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#endif
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