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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2020 Blender Foundation. All rights reserved. */
/** \file
* \ingroup bke
*/
#include "MEM_guardedalloc.h"
#include "DNA_mesh_types.h"
#include "DNA_modifier_types.h"
#include "DNA_object_types.h"
#include "BKE_subdiv.h"
#include "BKE_subdiv_eval.h"
#include "multires_reshape.h"
#include "opensubdiv_converter_capi.h"
#include "subdiv_converter.h"
static float simple_to_catmull_clark_get_edge_sharpness(
const OpenSubdiv_Converter *UNUSED(converter), int UNUSED(manifold_edge_index))
{
return 10.0f;
}
static bool simple_to_catmull_clark_is_infinite_sharp_vertex(
const OpenSubdiv_Converter *UNUSED(converter), int UNUSED(manifold_vertex_index))
{
return true;
}
static Subdiv *subdiv_for_simple_to_catmull_clark(Object *object, MultiresModifierData *mmd)
{
SubdivSettings subdiv_settings;
BKE_multires_subdiv_settings_init(&subdiv_settings, mmd);
Mesh *base_mesh = object->data;
OpenSubdiv_Converter converter;
BKE_subdiv_converter_init_for_mesh(&converter, &subdiv_settings, base_mesh);
converter.getEdgeSharpness = simple_to_catmull_clark_get_edge_sharpness;
converter.isInfiniteSharpVertex = simple_to_catmull_clark_is_infinite_sharp_vertex;
Subdiv *subdiv = BKE_subdiv_new_from_converter(&subdiv_settings, &converter);
BKE_subdiv_converter_free(&converter);
if (!BKE_subdiv_eval_begin_from_mesh(subdiv, base_mesh, NULL, SUBDIV_EVALUATOR_TYPE_CPU, NULL)) {
BKE_subdiv_free(subdiv);
return NULL;
}
return subdiv;
}
void multires_do_versions_simple_to_catmull_clark(Object *object, MultiresModifierData *mmd)
{
const Mesh *base_mesh = object->data;
if (base_mesh->totloop == 0) {
return;
}
/* Store the grids displacement in object space against the simple limit surface. */
{
Subdiv *subdiv = subdiv_for_simple_to_catmull_clark(object, mmd);
MultiresReshapeContext reshape_context;
if (!multires_reshape_context_create_from_subdiv(
&reshape_context, object, mmd, subdiv, mmd->totlvl)) {
BKE_subdiv_free(subdiv);
return;
}
multires_reshape_store_original_grids(&reshape_context);
multires_reshape_assign_final_coords_from_mdisps(&reshape_context);
multires_reshape_context_free(&reshape_context);
BKE_subdiv_free(subdiv);
}
/* Calculate the new tangent displacement against the new Catmull-Clark limit surface. */
{
MultiresReshapeContext reshape_context;
if (!multires_reshape_context_create_from_modifier(
&reshape_context, object, mmd, mmd->totlvl)) {
return;
}
multires_reshape_object_grids_to_tangent_displacement(&reshape_context);
multires_reshape_context_free(&reshape_context);
}
}
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