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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) 2005 Blender Foundation.
* All rights reserved.
*
* The Original Code is: all of this file.
*
* Contributor(s): Blender Foundation.
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file blender/blenkernel/intern/mesh_runtime.c
* \ingroup bke
*/
#include "atomic_ops.h"
#include "MEM_guardedalloc.h"
#include "DNA_mesh_types.h"
#include "DNA_meshdata_types.h"
#include "DNA_object_types.h"
#include "BLI_math_geom.h"
#include "BLI_threads.h"
#include "BKE_bvhutils.h"
#include "BKE_mesh.h"
#include "BKE_mesh_runtime.h"
#ifdef USE_DERIVEDMESH
#include "BKE_DerivedMesh.h"
#endif
/* -------------------------------------------------------------------- */
/** \name Mesh Runtime Struct Utils
* \{ */
static ThreadRWMutex loops_cache_lock = PTHREAD_RWLOCK_INITIALIZER;
/**
* Default values defined at read time.
*/
void BKE_mesh_runtime_reset(Mesh *mesh)
{
memset(&mesh->runtime, 0, sizeof(mesh->runtime));
}
void BKE_mesh_runtime_clear_cache(Mesh *mesh)
{
BKE_mesh_runtime_clear_geometry(mesh);
BKE_mesh_batch_cache_free(mesh);
BKE_mesh_runtime_clear_edit_data(mesh);
}
/* This is a ported copy of DM_ensure_looptri_data(dm) */
/**
* Ensure the array is large enough
*
* /note This function must always be thread-protected by caller. It should only be used by internal code.
*/
static void mesh_ensure_looptri_data(Mesh *mesh)
{
const unsigned int totpoly = mesh->totpoly;
const int looptris_len = poly_to_tri_count(totpoly, mesh->totloop);
BLI_assert(mesh->runtime.looptris.array_wip == NULL);
SWAP(MLoopTri *, mesh->runtime.looptris.array, mesh->runtime.looptris.array_wip);
if ((looptris_len > mesh->runtime.looptris.len_alloc) ||
(looptris_len < mesh->runtime.looptris.len_alloc * 2) ||
(totpoly == 0))
{
MEM_SAFE_FREE(mesh->runtime.looptris.array_wip);
mesh->runtime.looptris.len_alloc = 0;
mesh->runtime.looptris.len = 0;
}
if (totpoly) {
if (mesh->runtime.looptris.array_wip == NULL) {
mesh->runtime.looptris.array_wip = MEM_malloc_arrayN(looptris_len, sizeof(*mesh->runtime.looptris.array_wip), __func__);
mesh->runtime.looptris.len_alloc = looptris_len;
}
mesh->runtime.looptris.len = looptris_len;
}
}
/* This is a ported copy of CDDM_recalc_looptri(dm). */
void BKE_mesh_runtime_looptri_recalc(Mesh *mesh)
{
mesh_ensure_looptri_data(mesh);
BLI_assert(mesh->totpoly == 0 || mesh->runtime.looptris.array_wip != NULL);
BKE_mesh_recalc_looptri(
mesh->mloop, mesh->mpoly,
mesh->mvert,
mesh->totloop, mesh->totpoly,
mesh->runtime.looptris.array_wip);
BLI_assert(mesh->runtime.looptris.array == NULL);
atomic_cas_ptr((void **)&mesh->runtime.looptris.array, mesh->runtime.looptris.array, mesh->runtime.looptris.array_wip);
mesh->runtime.looptris.array_wip = NULL;
}
/* This is a ported copy of dm_getNumLoopTri(dm). */
int BKE_mesh_runtime_looptri_len(const Mesh *mesh)
{
const int looptri_len = poly_to_tri_count(mesh->totpoly, mesh->totloop);
BLI_assert(ELEM(mesh->runtime.looptris.len, 0, looptri_len));
return looptri_len;
}
/* This is a ported copy of dm_getLoopTriArray(dm). */
const MLoopTri *BKE_mesh_runtime_looptri_ensure(Mesh *mesh)
{
MLoopTri *looptri;
BLI_rw_mutex_lock(&loops_cache_lock, THREAD_LOCK_READ);
looptri = mesh->runtime.looptris.array;
BLI_rw_mutex_unlock(&loops_cache_lock);
if (looptri != NULL) {
BLI_assert(BKE_mesh_runtime_looptri_len(mesh) == mesh->runtime.looptris.len);
}
else {
BLI_rw_mutex_lock(&loops_cache_lock, THREAD_LOCK_WRITE);
/* We need to ensure array is still NULL inside mutex-protected code, some other thread might have already
* recomputed those looptris. */
if (mesh->runtime.looptris.array == NULL) {
BKE_mesh_runtime_looptri_recalc(mesh);
}
looptri = mesh->runtime.looptris.array;
BLI_rw_mutex_unlock(&loops_cache_lock);
}
return looptri;
}
/* This is a copy of DM_verttri_from_looptri(). */
void BKE_mesh_runtime_verttri_from_looptri(
MVertTri *r_verttri, const MLoop *mloop,
const MLoopTri *looptri, int looptri_num)
{
int i;
for (i = 0; i < looptri_num; i++) {
r_verttri[i].tri[0] = mloop[looptri[i].tri[0]].v;
r_verttri[i].tri[1] = mloop[looptri[i].tri[1]].v;
r_verttri[i].tri[2] = mloop[looptri[i].tri[2]].v;
}
}
bool BKE_mesh_runtime_ensure_edit_data(struct Mesh *mesh)
{
if (mesh->runtime.edit_data != NULL) {
return false;
}
mesh->runtime.edit_data = MEM_callocN(sizeof(EditMeshData), "EditMeshData");
return true;
}
bool BKE_mesh_runtime_clear_edit_data(Mesh *mesh)
{
if (mesh->runtime.edit_data == NULL) {
return false;
}
if (mesh->runtime.edit_data->polyCos != NULL)
MEM_freeN((void *)mesh->runtime.edit_data->polyCos);
if (mesh->runtime.edit_data->polyNos != NULL)
MEM_freeN((void *)mesh->runtime.edit_data->polyNos);
if (mesh->runtime.edit_data->vertexCos != NULL)
MEM_freeN((void *)mesh->runtime.edit_data->vertexCos);
if (mesh->runtime.edit_data->vertexNos != NULL)
MEM_freeN((void *)mesh->runtime.edit_data->vertexNos);
MEM_SAFE_FREE(mesh->runtime.edit_data);
return true;
}
void BKE_mesh_runtime_clear_geometry(Mesh *mesh)
{
bvhcache_free(&mesh->runtime.bvh_cache);
MEM_SAFE_FREE(mesh->runtime.looptris.array);
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name Mesh Batch Cache Callbacks
* \{ */
/* Draw Engine */
void (*BKE_mesh_batch_cache_dirty_cb)(Mesh *me, int mode) = NULL;
void (*BKE_mesh_batch_cache_free_cb)(Mesh *me) = NULL;
void BKE_mesh_batch_cache_dirty(Mesh *me, int mode)
{
if (me->runtime.batch_cache) {
BKE_mesh_batch_cache_dirty_cb(me, mode);
}
}
void BKE_mesh_batch_cache_free(Mesh *me)
{
if (me->runtime.batch_cache) {
BKE_mesh_batch_cache_free_cb(me);
}
}
/** \} */
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