913b8396d9
Adds a displacement support for OpenSubdiov based subsurf object implemented as a callback which gives vector displacement in object space. Currently is implemented to calculate displacement based on myltires displacement grids, but we can support things in the future if needed. Submitting to review to see if there is something obviously wrong in the direction (old multires code was sharing same displacement code to both calculate final displaced mesh and reshape an existing one, which is rather confusing and probably can be done more cleanly?). Reviewers: brecht Reviewed By: brecht Differential Revision: https://developer.blender.org/D3604
123 lines
4.0 KiB
C
123 lines
4.0 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) 2018 by Blender Foundation.
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* All rights reserved.
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*
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* Contributor(s): Sergey Sharybin.
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*
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* ***** END GPL LICENSE BLOCK *****
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*/
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/** \file blender/blenkernel/intern/subdiv.c
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* \ingroup bke
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*/
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#include "BKE_subdiv.h"
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#include "DNA_mesh_types.h"
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#include "DNA_modifier_types.h"
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#include "BLI_utildefines.h"
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#include "MEM_guardedalloc.h"
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#include "subdiv_converter.h"
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#include "opensubdiv_capi.h"
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#include "opensubdiv_converter_capi.h"
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#include "opensubdiv_evaluator_capi.h"
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#include "opensubdiv_topology_refiner_capi.h"
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eSubdivFVarLinearInterpolation
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BKE_subdiv_fvar_interpolation_from_uv_smooth(int uv_smooth)
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{
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switch (uv_smooth) {
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case SUBSURF_UV_SMOOTH_NONE:
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return SUBDIV_FVAR_LINEAR_INTERPOLATION_ALL;
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case SUBSURF_UV_SMOOTH_PRESERVE_CORNERS:
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return SUBDIV_FVAR_LINEAR_INTERPOLATION_CORNERS_ONLY;
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case SUBSURF_UV_SMOOTH_PRESERVE_CORNERS_AND_JUNCTIONS:
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return SUBDIV_FVAR_LINEAR_INTERPOLATION_CORNERS_AND_JUNCTIONS;
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case SUBSURF_UV_SMOOTH_PRESERVE_CORNERS_JUNCTIONS_AND_CONCAVE:
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return SUBDIV_FVAR_LINEAR_INTERPOLATION_CORNERS_JUNCTIONS_AND_CONCAVE;
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case SUBSURF_UV_SMOOTH_PRESERVE_BOUNDARIES:
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return SUBDIV_FVAR_LINEAR_INTERPOLATION_BOUNDARIES;
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case SUBSURF_UV_SMOOTH_ALL:
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return SUBDIV_FVAR_LINEAR_INTERPOLATION_NONE;
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}
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BLI_assert(!"Unknown uv smooth flag");
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return SUBSURF_UV_SMOOTH_NONE;
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}
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Subdiv *BKE_subdiv_new_from_converter(const SubdivSettings *settings,
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struct OpenSubdiv_Converter *converter)
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{
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SubdivStats stats;
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BKE_subdiv_stats_init(&stats);
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BKE_subdiv_stats_begin(&stats, SUBDIV_STATS_TOPOLOGY_REFINER_CREATION_TIME);
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OpenSubdiv_TopologyRefinerSettings topology_refiner_settings;
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topology_refiner_settings.level = settings->level;
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topology_refiner_settings.is_adaptive = settings->is_adaptive;
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struct OpenSubdiv_TopologyRefiner *osd_topology_refiner = NULL;
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if (converter->getNumVertices(converter) != 0) {
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osd_topology_refiner =
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openSubdiv_createTopologyRefinerFromConverter(
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converter, &topology_refiner_settings);
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}
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else {
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/* TODO(sergey): Check whether original geometry had any vertices.
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* The thing here is: OpenSubdiv can only deal with faces, but our
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* side of subdiv also deals with loose vertices and edges.
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*/
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}
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Subdiv *subdiv = MEM_callocN(sizeof(Subdiv), "subdiv from converetr");
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subdiv->settings = *settings;
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subdiv->topology_refiner = osd_topology_refiner;
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subdiv->evaluator = NULL;
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subdiv->displacement_evaluator = NULL;
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BKE_subdiv_stats_end(&stats, SUBDIV_STATS_TOPOLOGY_REFINER_CREATION_TIME);
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subdiv->stats = stats;
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return subdiv;
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}
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Subdiv *BKE_subdiv_new_from_mesh(const SubdivSettings *settings,
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struct Mesh *mesh)
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{
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if (mesh->totvert == 0) {
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return NULL;
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}
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OpenSubdiv_Converter converter;
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BKE_subdiv_converter_init_for_mesh(&converter, settings, mesh);
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Subdiv *subdiv = BKE_subdiv_new_from_converter(settings, &converter);
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BKE_subdiv_converter_free(&converter);
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return subdiv;
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}
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void BKE_subdiv_free(Subdiv *subdiv)
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{
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if (subdiv->evaluator != NULL) {
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openSubdiv_deleteEvaluator(subdiv->evaluator);
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}
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if (subdiv->topology_refiner != NULL) {
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openSubdiv_deleteTopologyRefiner(subdiv->topology_refiner);
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}
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BKE_subdiv_displacement_detach(subdiv);
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MEM_freeN(subdiv);
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}
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