150 lines
4.9 KiB
C++
150 lines
4.9 KiB
C++
/*
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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) Blender Foundation.
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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_SHRINKWRAP_H__
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#define __BKE_SHRINKWRAP_H__
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/** \file BKE_shrinkwrap.h
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* \ingroup bke
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*/
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/* mesh util */
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//TODO: move this somewhere else
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#include "BKE_customdata.h"
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struct DerivedMesh;
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struct Object;
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struct DerivedMesh *object_get_derived_final(struct Object *ob);
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/* SpaceTransform stuff */
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/*
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* TODO: move this somewhere else
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*
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* this structs encapsulates all needed data to convert between 2 coordinate spaces
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* (where conversion can be represented by a matrix multiplication)
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*
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* This is used to reduce the number of arguments to pass to functions that need to perform
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* this kind of operation and make it easier for the coder, as he/she doenst needs to recode
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* the matrix calculation.
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*
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* A SpaceTransform is initialized using:
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* space_transform_setup( &data, ob1, ob2 )
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*
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* After that the following calls can be used:
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* space_transform_apply (&data, co); //converts a coordinate in ob1 coords space to the corresponding ob2 coords
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* space_transform_invert(&data, co); //converts a coordinate in ob2 coords space to the corresponding ob1 coords
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*
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* //Same Concept as space_transform_apply and space_transform_invert, but no is normalized after conversion
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* space_transform_apply_normal (&data, &no);
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* space_transform_invert_normal(&data, &no);
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*
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*/
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struct Object;
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typedef struct SpaceTransform
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{
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float local2target[4][4];
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float target2local[4][4];
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} SpaceTransform;
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void space_transform_from_matrixs(struct SpaceTransform *data, float local[4][4], float target[4][4]);
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void space_transform_apply(const struct SpaceTransform *data, float *co);
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void space_transform_invert(const struct SpaceTransform *data, float *co);
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#define space_transform_setup(data, local, target) space_transform_from_matrixs(data, (local)->obmat, (target)->obmat)
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/* Shrinkwrap stuff */
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#include "BKE_bvhutils.h"
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/*
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* Shrinkwrap is composed by a set of functions and options that define the type of shrink.
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*
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* 3 modes are available:
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* - Nearest vertex
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* - Nearest surface
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* - Normal projection
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*
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* ShrinkwrapCalcData encapsulates all needed data for shrinkwrap functions.
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* (So that you don't have to pass an enormous amount of arguments to functions)
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*/
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struct Object;
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struct Scene;
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struct DerivedMesh;
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struct MVert;
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struct MDeformVert;
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struct ShrinkwrapModifierData;
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struct MDeformVert;
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struct BVHTree;
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typedef struct ShrinkwrapCalcData
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{
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ShrinkwrapModifierData *smd; //shrinkwrap modifier data
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struct Object *ob; //object we are applying shrinkwrap to
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struct MVert *vert; //Array of verts being projected (to fetch normals or other data)
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float (*vertexCos)[3]; //vertexs being shrinkwraped
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int numVerts;
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struct MDeformVert* dvert; //Pointer to mdeform array
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int vgroup; //Vertex group num
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struct DerivedMesh *target; //mesh we are shrinking to
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SpaceTransform local2target; //transform to move between local and target space
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float keepDist; //Distance to keep above target surface (units are in local space)
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} ShrinkwrapCalcData;
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void shrinkwrapModifier_deform(struct ShrinkwrapModifierData *smd, struct Object *ob, struct DerivedMesh *dm, float (*vertexCos)[3], int numVerts);
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/*
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* This function casts a ray in the given BVHTree.. but it takes into consideration the space_transform, that is:
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*
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* if transf was configured with "space_transform_setup( &transf, ob1, ob2 )"
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* then the input (vert, dir, BVHTreeRayHit) must be defined in ob1 coordinates space
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* and the BVHTree must be built in ob2 coordinate space.
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*
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* Thus it provides an easy way to cast the same ray across several trees (where each tree was built on its own coords space)
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*/
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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);
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/*
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* NULL initializers to local data
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*/
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#define NULL_ShrinkwrapCalcData {NULL, }
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#define NULL_BVHTreeFromMesh {NULL, }
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#define NULL_BVHTreeRayHit {NULL, }
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#define NULL_BVHTreeNearest {0, }
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#endif
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