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/*
* 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) 2018 by Blender Foundation.
* All rights reserved.
*/
/** \file
* \ingroup bke
*/
#pragma once
#include "BLI_sys_types.h"
#ifdef __cplusplus
extern "C" {
#endif
struct Mesh;
struct Subdiv;
struct SubdivForeachContext;
struct SubdivToMeshSettings;
typedef bool (*SubdivForeachTopologyInformationCb)(const struct SubdivForeachContext *context,
const int num_vertices,
const int num_edges,
const int num_loops,
const int num_polygons);
typedef void (*SubdivForeachVertexFromCornerCb)(const struct SubdivForeachContext *context,
void *tls,
const int ptex_face_index,
const float u,
const float v,
const int coarse_vertex_index,
const int coarse_poly_index,
const int coarse_corner,
const int subdiv_vertex_index);
typedef void (*SubdivForeachVertexFromEdgeCb)(const struct SubdivForeachContext *context,
void *tls,
const int ptex_face_index,
const float u,
const float v,
const int coarse_edge_index,
const int coarse_poly_index,
const int coarse_corner,
const int subdiv_vertex_index);
typedef void (*SubdivForeachVertexInnerCb)(const struct SubdivForeachContext *context,
void *tls,
const int ptex_face_index,
const float u,
const float v,
const int coarse_poly_index,
const int coarse_corner,
const int subdiv_vertex_index);
typedef void (*SubdivForeachEdgeCb)(const struct SubdivForeachContext *context,
void *tls,
const int coarse_edge_index,
const int subdiv_edge_index,
const int subdiv_v1,
const int subdiv_v2);
typedef void (*SubdivForeachLoopCb)(const struct SubdivForeachContext *context,
void *tls,
const int ptex_face_index,
const float u,
const float v,
const int coarse_loop_index,
const int coarse_poly_index,
const int coarse_corner,
const int subdiv_loop_index,
const int subdiv_vertex_index,
const int subdiv_edge_index);
typedef void (*SubdivForeachPolygonCb)(const struct SubdivForeachContext *context,
void *tls,
const int coarse_poly_index,
const int subdiv_poly_index,
const int start_loop_index,
const int num_loops);
typedef void (*SubdivForeachLooseCb)(const struct SubdivForeachContext *context,
void *tls,
const int coarse_vertex_index,
const int subdiv_vertex_index);
typedef void (*SubdivForeachVertexOfLooseEdgeCb)(const struct SubdivForeachContext *context,
void *tls,
const int coarse_edge_index,
const float u,
const int subdiv_vertex_index);
typedef struct SubdivForeachContext {
/* Is called when topology information becomes available.
* Is only called once.
*
* NOTE: If this callback returns false, the foreach loop is aborted.
*/
SubdivForeachTopologyInformationCb topology_info;
/* These callbacks are called from every ptex which shares "emitting"
* vertex or edge.
*/
SubdivForeachVertexFromCornerCb vertex_every_corner;
SubdivForeachVertexFromEdgeCb vertex_every_edge;
/* Those callbacks are run once per subdivision vertex, ptex is undefined
* as in it will be whatever first ptex face happened to be traversed in
* the multi-threaded environment and which shares "emitting" vertex or
* edge.
*/
SubdivForeachVertexFromCornerCb vertex_corner;
SubdivForeachVertexFromEdgeCb vertex_edge;
/* Called exactly once, always corresponds to a single ptex face. */
SubdivForeachVertexInnerCb vertex_inner;
/* Called once for each loose vertex. One loose coarse vertexcorresponds
* to a single subdivision vertex.
*/
SubdivForeachLooseCb vertex_loose;
/* Called once per vertex created for loose edge. */
SubdivForeachVertexOfLooseEdgeCb vertex_of_loose_edge;
/* NOTE: If subdivided edge does not come from coarse edge, ORIGINDEX_NONE
* will be passed as coarse_edge_index.
*/
SubdivForeachEdgeCb edge;
/* NOTE: If subdivided loop does not come from coarse loop, ORIGINDEX_NONE
* will be passed as coarse_loop_index.
*/
SubdivForeachLoopCb loop;
SubdivForeachPolygonCb poly;
/* User-defined pointer, to allow callbacks know something about context the
* traversal is happening for,
*/
void *user_data;
/* Initial value of TLS data. */
void *user_data_tls;
/* Size of TLS data. */
size_t user_data_tls_size;
/* Function to free TLS storage. */
void (*user_data_tls_free)(void *tls);
} SubdivForeachContext;
/* Invokes callbacks in the order and with values which corresponds to creation
* of final subdivided mesh.
*
* Main goal is to abstract all the traversal routines to give geometry element
* indices (for vertices, edges, loops, polygons) in the same way as subdivision
* modifier will do for a dense mesh.
*
* Returns truth if the whole topology was traversed, without any early exits.
*
* TODO(sergey): Need to either get rid of subdiv or of coarse_mesh.
* The main point here is to be able to get base level topology, which can be
* done with either of those. Having both of them is kind of redundant.
*/
bool BKE_subdiv_foreach_subdiv_geometry(struct Subdiv *subdiv,
const struct SubdivForeachContext *context,
const struct SubdivToMeshSettings *mesh_settings,
const struct Mesh *coarse_mesh);
#ifdef __cplusplus
}
#endif
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