diff options
Diffstat (limited to 'source/blender/blenkernel/BKE_shrinkwrap.h')
-rw-r--r-- | source/blender/blenkernel/BKE_shrinkwrap.h | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/source/blender/blenkernel/BKE_shrinkwrap.h b/source/blender/blenkernel/BKE_shrinkwrap.h new file mode 100644 index 00000000000..e8276238ff2 --- /dev/null +++ b/source/blender/blenkernel/BKE_shrinkwrap.h @@ -0,0 +1,146 @@ +/** + * BKE_shrinkwrap.h + * + * ***** 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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 + +/* mesh util */ +//TODO: move this somewhere else +#include "BKE_customdata.h" +struct DerivedMesh; +struct Object; +struct DerivedMesh *object_get_derived_final(struct Object *ob, CustomDataMask dataMask); + + +/* SpaceTransform stuff */ +/* + * TODO: move this somewhere else + * + * this structs encapsulates all needed data to convert between 2 coordinate spaces + * (where conversion can be represented by a matrix multiplication) + * + * This is used to reduce the number of arguments to pass to functions that need to perform + * this kind of operation and make it easier for the coder, as he/she doenst needs to recode + * the matrix calculation. + * + * A SpaceTransform is initialized using: + * space_transform_setup( &data, ob1, ob2 ) + * + * After that the following calls can be used: + * space_transform_apply (&data, co); //converts a coordinate in ob1 coords space to the corresponding ob2 coords + * space_transform_invert(&data, co); //converts a coordinate in ob2 coords space to the corresponding ob1 coords + * + * //Same Concept as space_transform_apply and space_transform_invert, but no is normalized after conversion + * space_transform_apply_normal (&data, &no); + * space_transform_invert_normal(&data, &no); + * + */ +struct Object; + +typedef struct SpaceTransform +{ + float local2target[4][4]; + float target2local[4][4]; + +} SpaceTransform; + +void space_transform_from_matrixs(SpaceTransform *data, float local[][4], float target[][4]); +#define space_transform_setup(data, local, target) space_transform_from_matrixs(data, (local)->obmat, (target)->obmat) + +void space_transform_apply (const SpaceTransform *data, float *co); +void space_transform_invert(const SpaceTransform *data, float *co); + +void space_transform_apply_normal (const SpaceTransform *data, float *no); +void space_transform_invert_normal(const SpaceTransform *data, float *no); + +/* 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 dont have to pass an enormous ammount of arguments to functions) + */ + +struct Object; +struct DerivedMesh; +struct ShrinkwrapModifierData; +struct BVHTree; + + +typedef struct ShrinkwrapCalcData +{ + ShrinkwrapModifierData *smd; //shrinkwrap modifier data + + struct Object *ob; //object we are applying shrinkwrap to + struct DerivedMesh *original; //mesh before shrinkwrap + + float (*vertexCos)[3]; //vertexs being shrinkwraped + int numVerts; + + struct DerivedMesh *target; //mesh we are shrinking to + SpaceTransform local2target; //transform to move bettwem local and target space + + float keepDist; //Distance to kept from target (units are in local space) + +} ShrinkwrapCalcData; + +void shrinkwrap_calc_nearest_vertex(ShrinkwrapCalcData *data); +void shrinkwrap_calc_normal_projection(ShrinkwrapCalcData *data); +void shrinkwrap_calc_nearest_surface_point(ShrinkwrapCalcData *data); + +void shrinkwrapModifier_deform(struct ShrinkwrapModifierData *smd, struct Object *ob, struct DerivedMesh *dm, float (*vertexCos)[3], int numVerts); + +/* + * 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) + */ +int normal_projection_project_vertex(char options, const float *vert, const float *dir, const 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 + |