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/**
*
* $Id$
*
* ***** BEGIN GPL/BL DUAL 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. The Blender
* Foundation also sells licenses for use in proprietary software under
* the Blender License. See http://www.blender.org/BL/ for information
* about this.
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
* All rights reserved.
*
* The Original Code is: all of this file.
*
* Contributor(s): none yet.
*
* ***** END GPL/BL DUAL LICENSE BLOCK *****
*/
#ifndef BKE_MODIFIER_H
#define BKE_MODIFIER_H
#include "BKE_customdata.h"
struct EditMesh;
struct DerivedMesh;
struct DagForest;
struct DagNode;
struct Object;
struct ListBase;
struct LinkNode;
struct bArmature;
typedef enum {
/* Should not be used, only for None modifier type */
eModifierTypeType_None,
/* Modifier only does deformation, implies that modifier
* type should have a valid deformVerts function. OnlyDeform
* style modifiers implicitly accept either mesh or CV
* input but should still declare flags appropriately.
*/
eModifierTypeType_OnlyDeform,
eModifierTypeType_Constructive,
eModifierTypeType_Nonconstructive,
} ModifierTypeType;
typedef enum {
eModifierTypeFlag_AcceptsMesh = (1<<0),
eModifierTypeFlag_AcceptsCVs = (1<<1),
eModifierTypeFlag_SupportsMapping = (1<<2),
eModifierTypeFlag_SupportsEditmode = (1<<3),
/* For modifiers that support editmode this determines if the
* modifier should be enabled by default in editmode. This should
* only be used by modifiers that are relatively speedy and
* also generally used in editmode, otherwise let the user enable
* it by hand.
*/
eModifierTypeFlag_EnableInEditmode = (1<<4),
/* For modifiers that require original data and so cannot
* be placed after any non-deformative modifier.
*/
eModifierTypeFlag_RequiresOriginalData = (1<<5),
} ModifierTypeFlag;
typedef void (*ObjectWalkFunc)(void *userData, Object *ob, Object **obpoin);
typedef void (*IDWalkFunc)(void *userData, Object *ob, ID **idpoin);
typedef struct ModifierTypeInfo {
/* The user visible name for this modifier */
char name[32];
/* The DNA struct name for the modifier data type, used to
* write the DNA data out.
*/
char structName[32];
/* The size of the modifier data type, used by allocation. */
int structSize;
ModifierTypeType type;
ModifierTypeFlag flags;
/********************* Non-optional functions *********************/
/* Copy instance data for this modifier type. Should copy all user
* level settings to the target modifier.
*/
void (*copyData)(ModifierData *md, ModifierData *target);
/********************* Deform modifier functions *********************/
/* Only for deform types, should apply the deformation
* to the given vertex array. If the deformer requires information from
* the object it can obtain it from the derivedData argument if non-NULL,
* and otherwise the ob argument.
*/
void (*deformVerts)(ModifierData *md, struct Object *ob,
struct DerivedMesh *derivedData,
float (*vertexCos)[3], int numVerts);
/* Like deformVerts but called during editmode (for supporting modifiers)
*/
void (*deformVertsEM)(
ModifierData *md, struct Object *ob,
struct EditMesh *editData, struct DerivedMesh *derivedData,
float (*vertexCos)[3], int numVerts);
/********************* Non-deform modifier functions *********************/
/* For non-deform types: apply the modifier and return a derived
* data object (type is dependent on object type).
*
* The derivedData argument should always be non-NULL; the modifier
* should read the object data from the derived object instead of the
* actual object data.
*
* The useRenderParams argument indicates if the modifier is being
* applied in the service of the renderer which may alter quality
* settings.
*
* The isFinalCalc parameter indicates if the modifier is being
* calculated for a final result or for something temporary
* (like orcos). This is a hack at the moment, it is meant so subsurf
* can know if it is safe to reuse its internal cache.
*
* The modifier may reuse the derivedData argument (i.e. return it in
* modified form), but must not release it.
*/
struct DerivedMesh *(*applyModifier)(
ModifierData *md, struct Object *ob,
struct DerivedMesh *derivedData,
int useRenderParams, int isFinalCalc);
/* Like applyModifier but called during editmode (for supporting
* modifiers).
*
* The derived object that is returned must support the operations that
* are expected from editmode objects. The same qualifications regarding
* derivedData apply as for applyModifier.
*/
struct DerivedMesh *(*applyModifierEM)(
ModifierData *md, struct Object *ob,
struct EditMesh *editData,
struct DerivedMesh *derivedData);
/********************* Optional functions *********************/
/* Initialize new instance data for this modifier type, this function
* should set modifier variables to their default values.
*
* This function is optional.
*/
void (*initData)(ModifierData *md);
/* Should return a CustomDataMask indicating what data this
* modifier needs. If (mask & (1 << (layer type))) != 0, this modifier
* needs that custom data layer. This function's return value can change
* depending on the modifier's settings.
*
* Note that this means extra data (e.g. vertex groups) - it is assumed
* that all modifiers need mesh data and deform modifiers need vertex
* coordinates.
*
* Note that this limits the number of custom data layer types to 32.
*
* If this function is not present or it returns 0, it is assumed that
* no extra data is needed.
*
* This function is optional.
*/
CustomDataMask (*requiredDataMask)(ModifierData *md);
/* Free internal modifier data variables, this function should
* not free the md variable itself.
*
* This function is optional.
*/
void (*freeData)(ModifierData *md);
/* Return a boolean value indicating if this modifier is able to be
* calculated based on the modifier data. This is *not* regarding the
* md->flag, that is tested by the system, this is just if the data
* validates (for example, a lattice will return false if the lattice
* object is not defined).
*
* This function is optional (assumes never disabled if not present).
*/
int (*isDisabled)(ModifierData *md);
/* Add the appropriate relations to the DEP graph depending on the
* modifier data.
*
* This function is optional.
*/
void (*updateDepgraph)(ModifierData *md, struct DagForest *forest,
struct Object *ob, struct DagNode *obNode);
/* Should return true if the modifier needs to be recalculated on time
* changes.
*
* This function is optional (assumes false if not present).
*/
int (*dependsOnTime)(ModifierData *md);
/* Should call the given walk function on with a pointer to each Object
* pointer that the modifier data stores. This is used for linking on file
* load and for unlinking objects or forwarding object references.
*
* This function is optional.
*/
void (*foreachObjectLink)(ModifierData *md, struct Object *ob,
ObjectWalkFunc walk, void *userData);
/* Should call the given walk function with a pointer to each ID
* pointer (i.e. each datablock pointer) that the modifier data
* stores. This is used for linking on file load and for
* unlinking datablocks or forwarding datablock references.
*
* This function is optional. If it is not present, foreachObjectLink
* will be used.
*/
void (*foreachIDLink)(ModifierData *md, struct Object *ob,
IDWalkFunc walk, void *userData);
} ModifierTypeInfo;
ModifierTypeInfo *modifierType_getInfo (ModifierType type);
/* Modifier utility calls, do call through type pointer and return
* default values if pointer is optional.
*/
ModifierData *modifier_new(int type);
void modifier_free(ModifierData *md);
void modifier_copyData(ModifierData *md, ModifierData *target);
int modifier_dependsOnTime(ModifierData *md);
int modifier_supportsMapping(ModifierData *md);
int modifier_couldBeCage(ModifierData *md);
void modifier_setError(ModifierData *md, char *format, ...);
void modifiers_foreachObjectLink(struct Object *ob,
ObjectWalkFunc walk,
void *userData);
void modifiers_foreachIDLink(struct Object *ob,
IDWalkFunc walk,
void *userData);
ModifierData *modifiers_findByType(struct Object *ob, ModifierType type);
void modifiers_clearErrors(struct Object *ob);
int modifiers_getCageIndex(struct Object *ob,
int *lastPossibleCageIndex_r);
int modifiers_isSoftbodyEnabled(struct Object *ob);
struct Object *modifiers_isDeformedByArmature(struct Object *ob);
int modifiers_usesArmature(struct Object *ob, struct bArmature *arm);
int modifiers_isDeformed(struct Object *ob);
/* Calculates and returns a linked list of CustomDataMasks indicating the
* data required by each modifier in the stack pointed to by md for correct
* evaluation, assuming the data indicated by dataMask is required at the
* end of the stack.
*/
struct LinkNode *modifiers_calcDataMasks(ModifierData *md,
CustomDataMask dataMask);
ModifierData *modifiers_getVirtualModifierList(struct Object *ob);
#endif
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