106 lines
3.5 KiB
C
106 lines
3.5 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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/* 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 Mesh;
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struct MVert;
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struct MDeformVert;
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struct ModifierEvalContext;
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struct ShrinkwrapModifierData;
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struct BVHTree;
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struct SpaceTransform;
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typedef struct ShrinkwrapCalcData {
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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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bool invert_vgroup; /* invert vertex group influence */
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struct Mesh *target; //mesh we are shrinking to
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struct 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 Mesh *mesh,
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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
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* (where each tree was built on its own coords space)
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*/
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bool BKE_shrinkwrap_project_normal(
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char options, const float vert[3], const float dir[3], const float ray_radius,
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const struct SpaceTransform *transf, BVHTree *tree, BVHTreeRayHit *hit,
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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 /* __BKE_SHRINKWRAP_H__ */
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