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mod_geo-tp
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fix hole boundary highlighting

This commit is contained in:
ccolin 2021-10-03 15:04:14 +02:00
parent 89342b1c5e
commit a965e6a58e
4 changed files with 42 additions and 25 deletions
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17
src/mesh_processor.cpp
View File

@ -4,15 +4,17 @@
#include <unordered_set>
static std::vector<HalfedgeHandle> findHoles(MyMesh &mesh) {
std::vector<HalfedgeHandle> holes;
static std::vector<std::vector<HalfedgeHandle>> findHoles(MyMesh &mesh) {
std::vector<std::vector<HalfedgeHandle>> holes;
std::set<HalfedgeHandle> ignore;
for (HalfedgeHandle it : mesh.halfedges()) {
if (mesh.is_boundary(it)
&& ignore.find(it) == ignore.end()) {
holes.push_back(it);
holes.emplace_back();
holes.back().push_back(it);
ignore.insert(it);
for (HalfedgeHandle it2 : HalfedgeLoopRange(mesh, it)) {
holes.back().push_back(it2);
ignore.insert(it2);
}
}
@ -33,14 +35,14 @@ MeshProcessor::MeshProcessor(const QString &path) {
}
void fillHoleDumb(MyMesh &mesh, HalfedgeHandle &hole) {
void fillHoleDumb(MyMesh &mesh, std::vector<HalfedgeHandle> &hole) {
mesh.request_vertex_status();
mesh.request_edge_status();
mesh.request_face_status();
Point center(0, 0, 0);
size_t length = 0;
for (HalfedgeHandle it : HalfedgeLoopRange(mesh, hole)) {
for (HalfedgeHandle it : hole) {
VertexHandle vert = mesh.to_vertex_handle(it);
center += mesh.point(vert);
length++;
@ -48,13 +50,10 @@ void fillHoleDumb(MyMesh &mesh, HalfedgeHandle &hole) {
center /= length;
VertexHandle center_handle = mesh.new_vertex_dirty(center);
for (HalfedgeHandle it = hole;
mesh.to_vertex_handle(it) != center_handle;) {
HalfedgeHandle next = mesh.next_halfedge_handle(it);
for (HalfedgeHandle it : hole) {
mesh.add_face(mesh.from_vertex_handle(it),
mesh.to_vertex_handle(it),
center_handle);
it = next;
}
}

2
src/mesh_processor.h
View File

@ -12,7 +12,7 @@ class MeshProcessor : public QObject {
public:
MyMesh mesh;
std::vector<HalfedgeHandle> holes;
std::vector<std::vector<HalfedgeHandle>> holes;
MeshProcessor(const QString &path);

46
src/mesh_view.cpp
View File

@ -7,10 +7,12 @@
MeshView::MeshView(const MeshProcessor &mesh_processor, QOpenGLShaderProgram &program)
:vertex_buffer(QOpenGLBuffer::VertexBuffer),
index_buffer(QOpenGLBuffer::IndexBuffer),
holes_index_buffer(QOpenGLBuffer::IndexBuffer),
n_faces(mesh_processor.mesh.n_faces()),
n_vertices(mesh_processor.mesh.n_vertices()),
mesh_processor(mesh_processor) {
const MyMesh &mesh = mesh_processor.mesh;
QVector<GLfloat> vertices(n_vertices * 3);
size_t i = 0;
for (const VertexHandle it : mesh.vertices()) {
@ -19,6 +21,7 @@ MeshView::MeshView(const MeshProcessor &mesh_processor, QOpenGLShaderProgram &pr
vertices[3*i + 2] = mesh.point(it)[2];
i++;
}
QVector<GLuint> indices(n_faces * 3);
i = 0;
for (const FaceHandle it : mesh.faces()) {
@ -31,6 +34,16 @@ MeshView::MeshView(const MeshProcessor &mesh_processor, QOpenGLShaderProgram &pr
i++;
}
QVector<GLuint> holes_indices;
n_boundary_halfedges = 0;
for (std::vector<HalfedgeHandle> hole : mesh_processor.holes) {
for (HalfedgeHandle it : hole) {
holes_indices.push_back(mesh.from_vertex_handle(it).idx());
holes_indices.push_back(mesh.to_vertex_handle(it).idx());
n_boundary_halfedges++;
}
}
vao.create();
{QOpenGLVertexArrayObject::Binder binder(&vao);
vertex_buffer.create();
@ -41,6 +54,10 @@ MeshView::MeshView(const MeshProcessor &mesh_processor, QOpenGLShaderProgram &pr
index_buffer.bind();
index_buffer.setUsagePattern(QOpenGLBuffer::StreamDraw);
index_buffer.allocate(indices.constData(), n_faces * 3 * sizeof (GLuint));
holes_index_buffer.create();
holes_index_buffer.bind();
holes_index_buffer.setUsagePattern(QOpenGLBuffer::StreamDraw);
holes_index_buffer.allocate(holes_indices.constData(), n_boundary_halfedges * 2 * sizeof (GLuint));
program.setAttributeBuffer("pos", GL_FLOAT, 0, 3);
program.enableAttributeArray("pos");
}
@ -74,22 +91,21 @@ void MeshView::paint(QOpenGLShaderProgram &program) {
glf->glDrawElements(GL_TRIANGLES, n_faces * 3, GL_UNSIGNED_INT, 0);
glf->glDisable(GL_POLYGON_OFFSET_FILL);
/* Wireframe */
glf21->glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
glf->glLineWidth(2);
program.setUniformValue("wireframe", 1);
glf->glDrawElements(GL_TRIANGLES, n_faces * 3, GL_UNSIGNED_INT, 0);
glf21->glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
program.setUniformValue("wireframe", 0);
/* Wireframe */
glf21->glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
glf->glDepthMask(GL_FALSE);
glf->glLineWidth(2);
glf->glDrawElements(GL_TRIANGLES, n_faces * 3, GL_UNSIGNED_INT, 0);
glf->glDepthMask(GL_TRUE);
glf21->glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
// program.setUniformValue("wf_col", QVector3D(1, 0, 1));
// for (HalfedgeHandle hole : mesh_processor.holes) {
// for (HalfedgeHandle it : ConstHalfedgeLoopRange(mesh, hole)) {
// int v0 = mesh.from_vertex_handle(it).idx();
// int v1 = mesh.to_vertex_handle(it).idx();
// glf->glDrawArrays(GL_LINES, std::min(v0, v1), std::max(v0, v1));
// }
// }
// program.setUniformValue("wf_col", QVector3D(0, 0, 0));
/* Holes */
program.setUniformValue("wf_col", QVector3D(1, 0, 1));
holes_index_buffer.bind();
glf->glDrawElements(GL_LINES, n_boundary_halfedges * 2, GL_UNSIGNED_INT, 0);
index_buffer.bind();
program.setUniformValue("wf_col", QVector3D(0, 0, 0));
program.setUniformValue("wireframe", 0);
}
}

2
src/mesh_view.h
View File

@ -12,8 +12,10 @@ class MeshView {
QOpenGLVertexArrayObject vao;
QOpenGLBuffer vertex_buffer;
QOpenGLBuffer index_buffer;
QOpenGLBuffer holes_index_buffer;
unsigned n_faces;
unsigned n_vertices;
unsigned n_boundary_halfedges;
public:
const MeshProcessor &mesh_processor;