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// Copyright 2020 Blender Foundation. All rights reserved.
//
// 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.
//
// Author: Sergey Sharybin
#include "internal/topology/mesh_topology.h"
#include <cassert>
#include <opensubdiv/sdc/crease.h>
#include "opensubdiv_converter_capi.h"
namespace blender {
namespace opensubdiv {
namespace {
////////////////////////////////////////////////////////////////////////////////
// Geometry tags.
// Vertices.
// TODO(sergey): Make this function usable by factory as well.
float getEffectiveVertexSharpness(const OpenSubdiv_Converter *converter, const int vertex_index)
{
if (converter->isInfiniteSharpVertex != nullptr &&
converter->isInfiniteSharpVertex(converter, vertex_index)) {
return OpenSubdiv::Sdc::Crease::SHARPNESS_INFINITE;
}
if (converter->getVertexSharpness != nullptr) {
return converter->getVertexSharpness(converter, vertex_index);
}
return 0.0f;
}
bool isEqualVertexTags(const MeshTopology &mesh_topology, const OpenSubdiv_Converter *converter)
{
const int num_vertices = mesh_topology.getNumVertices();
for (int vertex_index = 0; vertex_index < num_vertices; ++vertex_index) {
const float current_sharpness = mesh_topology.getVertexSharpness(vertex_index);
const float requested_sharpness = getEffectiveVertexSharpness(converter, vertex_index);
if (current_sharpness != requested_sharpness) {
return false;
}
}
return true;
}
// Edges.
// TODO(sergey): Make this function usable by factory as well.
float getEffectiveEdgeSharpness(const OpenSubdiv_Converter *converter, const int edge_index)
{
if (converter->getEdgeSharpness != nullptr) {
return converter->getEdgeSharpness(converter, edge_index);
}
return 0.0f;
}
bool isEqualEdgeTags(const MeshTopology &mesh_topology, const OpenSubdiv_Converter *converter)
{
const int num_edges = mesh_topology.getNumEdges();
for (int edge_index = 0; edge_index < num_edges; ++edge_index) {
const float current_sharpness = mesh_topology.getEdgeSharpness(edge_index);
const float requested_sharpness = getEffectiveEdgeSharpness(converter, edge_index);
if (current_sharpness != requested_sharpness) {
return false;
}
}
return true;
}
} // namespace
////////////////////////////////////////////////////////////////////////////////
// Entry point.
bool MeshTopology::isEqualToConverter(const OpenSubdiv_Converter *converter) const
{
if (!isEqualVertexTags(*this, converter)) {
return false;
}
if (!isEqualEdgeTags(*this, converter)) {
return false;
}
return true;
}
} // namespace opensubdiv
} // namespace blender
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