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/*
* ***** 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) Blender Foundation.
* All rights reserved.
*
* The Original Code is: all of this file.
*
* Contributor(s): none yet.
*
* ***** END GPL LICENSE BLOCK *****
*/
#ifndef __BKE_SHRINKWRAP_H__
#define __BKE_SHRINKWRAP_H__
/** \file BKE_shrinkwrap.h
* \ingroup bke
*/
/* Shrinkwrap stuff */
#include "BKE_bvhutils.h"
/*
* Shrinkwrap is composed by a set of functions and options that define the type of shrink.
*
* 3 modes are available:
* - Nearest vertex
* - Nearest surface
* - Normal projection
*
* ShrinkwrapCalcData encapsulates all needed data for shrinkwrap functions.
* (So that you don't have to pass an enormous amount of arguments to functions)
*/
struct Object;
struct Scene;
struct DerivedMesh;
struct MVert;
struct MDeformVert;
struct ShrinkwrapModifierData;
struct MDeformVert;
struct BVHTree;
struct SpaceTransform;
typedef struct ShrinkwrapCalcData {
ShrinkwrapModifierData *smd; //shrinkwrap modifier data
struct Object *ob; //object we are applying shrinkwrap to
struct MVert *vert; //Array of verts being projected (to fetch normals or other data)
float (*vertexCos)[3]; //vertexs being shrinkwraped
int numVerts;
struct MDeformVert *dvert; //Pointer to mdeform array
int vgroup; //Vertex group num
struct DerivedMesh *target; //mesh we are shrinking to
struct SpaceTransform local2target; //transform to move between local and target space
float keepDist; //Distance to keep above target surface (units are in local space)
} ShrinkwrapCalcData;
void shrinkwrapModifier_deform(struct ShrinkwrapModifierData *smd, struct Object *ob, struct DerivedMesh *dm,
float (*vertexCos)[3], int numVerts, bool for_render);
/*
* This function casts a ray in the given BVHTree.. but it takes into consideration the space_transform, that is:
*
* if transf was configured with "SPACE_TRANSFORM_SETUP( &transf, ob1, ob2 )"
* then the input (vert, dir, BVHTreeRayHit) must be defined in ob1 coordinates space
* and the BVHTree must be built in ob2 coordinate space.
*
* Thus it provides an easy way to cast the same ray across several trees
* (where each tree was built on its own coords space)
*/
bool BKE_shrinkwrap_project_normal(
char options, const float vert[3], const float dir[3],
const struct SpaceTransform *transf, BVHTree *tree, BVHTreeRayHit *hit,
BVHTree_RayCastCallback callback, void *userdata);
/*
* NULL initializers to local data
*/
#define NULL_ShrinkwrapCalcData {NULL, }
#define NULL_BVHTreeFromMesh {NULL, }
#define NULL_BVHTreeRayHit {NULL, }
#define NULL_BVHTreeNearest {0, }
#endif /* __BKE_SHRINKWRAP_H__ */
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