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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>
namespace blender {
namespace opensubdiv {
MeshTopology::MeshTopology() : num_vertices_(0), num_edges_(0), num_faces_(0)
{
}
MeshTopology::~MeshTopology()
{
}
////////////////////////////////////////////////////////////////////////////////
// Vertices.
void MeshTopology::setNumVertices(int num_vertices)
{
num_vertices_ = num_vertices;
}
int MeshTopology::getNumVertices() const
{
return num_vertices_;
}
void MeshTopology::setVertexSharpness(int vertex_index, float sharpness)
{
assert(vertex_index >= 0);
assert(vertex_index < getNumVertices());
ensureVertexTagsSize(vertex_index + 1);
vertex_tags_[vertex_index].sharpness = sharpness;
}
float MeshTopology::getVertexSharpness(int vertex_index) const
{
assert(vertex_index >= 0);
assert(vertex_index < getNumVertices());
if (vertex_index >= vertex_tags_.size()) {
// Sharpness for the vertex was never provided.
return 0.0f;
}
return vertex_tags_[vertex_index].sharpness;
}
void MeshTopology::ensureVertexTagsSize(int num_vertices)
{
if (vertex_tags_.size() < num_vertices) {
vertex_tags_.resize(num_vertices);
}
}
////////////////////////////////////////////////////////////////////////////////
// Edges.
void MeshTopology::setNumEdges(int num_edges)
{
num_edges_ = num_edges;
edges_.resize(num_edges_);
}
int MeshTopology::getNumEdges() const
{
return num_edges_;
}
void MeshTopology::setEdgeVertexIndices(int edge_index, int v1, int v2)
{
assert(edge_index >= 0);
assert(edge_index < getNumEdges());
assert(v1 >= 0);
assert(v1 < getNumVertices());
assert(v2 >= 0);
assert(v2 < getNumVertices());
ensureNumEdgesAtLeast(edge_index + 1);
Edge &edge = edges_[edge_index];
// Prevent attempts to override edges.
// This is currently not supposed to happen.
assert(!edge.isValid());
edge.v1 = v1;
edge.v2 = v2;
}
void MeshTopology::getEdgeVertexIndices(int edge_index, int *v1, int *v2) const
{
assert(edge_index >= 0);
assert(edge_index < getNumEdges());
const Edge &edge = edges_[edge_index];
*v1 = edge.v1;
*v2 = edge.v2;
}
bool MeshTopology::isEdgeEqual(int edge_index, int expected_v1, int expected_v2) const
{
assert(edge_index >= 0);
assert(edge_index < getNumEdges());
const Edge &edge = edges_[edge_index];
return edge.v1 == expected_v1 && edge.v2 == expected_v2;
}
void MeshTopology::setEdgeSharpness(int edge_index, float sharpness)
{
assert(edge_index >= 0);
assert(edge_index < getNumEdges());
Edge &edge = edges_[edge_index];
assert(edge.isValid());
if (sharpness < 1e-6f) {
return;
}
ensureEdgeTagsSize(edge_index + 1);
edge_tags_[edge_index].sharpness = sharpness;
}
float MeshTopology::getEdgeSharpness(int edge_index) const
{
assert(edge_index >= 0);
if (edge_index >= edge_tags_.size()) {
// NOTE: It's possible that full topology is not known and that there was
// never sharpness assigned to any of the edges.
return 0.0f;
}
return edge_tags_[edge_index].sharpness;
}
void MeshTopology::ensureNumEdgesAtLeast(int num_edges)
{
if (getNumEdges() < num_edges) {
setNumEdges(num_edges);
}
}
void MeshTopology::ensureEdgeTagsSize(int num_edges)
{
if (edge_tags_.size() < num_edges) {
edge_tags_.resize(num_edges);
}
}
////////////////////////////////////////////////////////////////////////////////
// Faces.
void MeshTopology::setNumFaces(int num_faces)
{
num_faces_ = num_faces;
faces_.resize(num_faces);
}
int MeshTopology::getNumFaces() const
{
return num_faces_;
}
void MeshTopology::setNumFaceVertices(int face_index, int num_face_vertices)
{
assert(face_index >= 0);
assert(face_index < getNumFaces());
Face &face = faces_[face_index];
face.setNumVertices(num_face_vertices);
}
int MeshTopology::getNumFaceVertices(int face_index) const
{
assert(face_index >= 0);
assert(face_index < getNumFaces());
const Face &face = faces_[face_index];
return face.getNumVertices();
}
void MeshTopology::setFaceVertexIndices(int face_index, int *face_vertex_indices)
{
assert(face_index >= 0);
assert(face_index < getNumFaces());
Face &face = faces_[face_index];
face.setVertexIndices(face_vertex_indices);
}
bool MeshTopology::isFaceVertexIndicesEqual(int face_index,
const vector<int> &expected_vertices_of_face) const
{
assert(face_index >= 0);
assert(face_index < getNumFaces());
const Face &face = faces_[face_index];
return face.vertex_indices == expected_vertices_of_face;
}
} // namespace opensubdiv
} // namespace blender
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