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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
struct DerivedMesh;
struct ModifierData;
struct DagForest;
struct DagNode;
struct Object;
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),
} ModifierTypeFlag;
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;
/* Initialize new instance data for this modifier type, this function
* should set modifier variables to their default values.
*
* This function is optional.
*/
void (*initData)(struct ModifierData *md);
/* Free internal modifier data variables, this function should
* not free the _md_ variable itself.
*
* This function is optional.
*/
void (*freeData)(struct 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)(struct ModifierData *md);
/* Add the appropriate relations to the DEP graph depending on the modifier
* data.
*
* This function is optional.
*/
void (*updateDepgraph)(struct 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)(struct ModifierData *md);
/* 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)(struct ModifierData *md, struct Object *ob, void *derivedData, float (*vertexCos)[3], int numVerts);
/* Like deformVerts but called during editmode (for supporting modifiers) */
void (*deformVertsEM)(struct ModifierData *md, struct Object *ob, void *editData, void *derivedData, float (*vertexCos)[3], int numVerts);
/* For non-deform types: apply the modifier and return a new derived
* data object (type is dependent on object type). If the _derivedData_
* argument is non-NULL then the modifier should read the object data
* from the derived object instead of the actual object data.
*
* If the _vertexCos_ argument is non-NULL then the modifier should read
* the vertex coordinates from that (even if _derivedData_ is non-NULL).
* The length of the _vertexCos_ array is either the number of verts in
* the derived object (if non-NULL) or otherwise the number of verts in
* the original object.
*
* The _useRenderParams_ 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 is expected to release (or reuse) the _derivedData_ argument
* if non-NULL. The modifier *MAY NOT* share the _vertexCos_ argument.
*/
void *(*applyModifier)(struct ModifierData *md, struct Object *ob, void *derivedData, float (*vertexCos)[3], 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_ and _vertexCos_
* apply as for applyModifier.
*/
void *(*applyModifierEM)(struct ModifierData *md, struct Object *ob, void *editData, void *derivedData, float (*vertexCos)[3]);
} ModifierTypeInfo;
ModifierTypeInfo *modifierType_get_info(ModifierType type);
/* Modifier utility calls, do call through type pointer and return
* default values if pointer is optional.
*/
struct ModifierData* modifier_new (int type);
void modifier_free (struct ModifierData *md);
int modifier_dependsOnTime (struct ModifierData *md);
#endif
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