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/* This file is part of the Gudhi Library. The Gudhi library
* (Geometric Understanding in Higher Dimensions) is a generic C++
* library for computational topology.
*
* Author(s): David Salinas
*
* Copyright (C) 2014 INRIA Sophia Antipolis-Mediterranee (France)
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*
*/
#include <utility>
#include "Viewer_instructor.h"
#include "utils/UI_utils.h"
#include "FirstCoordProjector.h"
Viewer_instructor::Viewer_instructor(QWidget* parent,
Viewer* viewer,
const Complex& mesh
)
: viewer_(viewer), mesh_(mesh), projector_(new FirstCoordProjector3D()) {
viewer_->set_instructor(this);
}
void Viewer_instructor::initialize_bounding_box() {
auto pair_bounding_box = compute_bounding_box_corners();
viewer_->set_bounding_box(proj(pair_bounding_box.first), proj(pair_bounding_box.second));
viewer_->init_scene();
}
std::pair<Complex::Point, Complex::Point> Viewer_instructor::compute_bounding_box_corners() {
if (mesh_.empty()) {
return std::make_pair(Point(-1, -1, -1, 1), Point(1, 1, 1, 1));
} else {
double x_min = 1e10;
double y_min = 1e10;
double z_min = 1e10;
double x_max = -1e10;
double y_max = -1e10;
double z_max = -1e10;
for (auto vi : mesh_.vertex_range()) {
auto pt = proj(mesh_.point(vi));
x_min = (std::min)(x_min, pt.x());
y_min = (std::min)(y_min, pt.y());
z_min = (std::min)(z_min, pt.z());
x_max = (std::max)(x_max, pt.x());
y_max = (std::max)(y_max, pt.y());
z_max = (std::max)(z_max, pt.z());
}
return std::make_pair(Point(x_min, y_min, z_min, 1.),
Point(x_max, y_max, z_max, 1.));
}
}
void Viewer_instructor::show_entire_scene() {
viewer_->show_entire_scene();
}
const qglviewer::Camera* Viewer_instructor::camera() const {
return viewer_->camera();
}
int
Viewer_instructor::width() const {
return viewer_->width();
}
int
Viewer_instructor::height() const {
return viewer_->height();
}
/**
* to change display parameters
*/
View_parameter& Viewer_instructor::view_params() {
return view_params_;
}
void
Viewer_instructor::give_instructions() {
if (view_params_.relative_light)
viewer_->set_light_direction();
else
viewer_->set_light_direction(view_params_.theta, view_params_.phi);
viewer_->set_light();
if (view_params_.edge_mode) draw_edges();
if (view_params_.triangle_mode) draw_triangles();
if (view_params_.vertex_mode) draw_points();
}
void Viewer_instructor::draw_edges() {
viewer_->begin_draw_edges(view_params_.size_edges, false);
for (auto edge : mesh_.edge_range()) {
set_color_edge(edge);
const Point& a = mesh_.point(mesh_.first_vertex(edge));
const Point& b = mesh_.point(mesh_.second_vertex(edge));
viewer_->draw_edges(proj(a), proj(b));
}
viewer_->end_draw_edges();
}
void Viewer_instructor::draw_triangles() {
const double size_triangles = 1.0;
viewer_->begin_draw_triangles(size_triangles, view_params_.light);
for (const auto& fit : mesh_.triangle_range()) {
set_color_triangle(fit);
if (view_params_.triangle_mode) {
auto fit_it = fit.begin();
const Point& p1 = mesh_.point(*fit_it);
const Point& p2 = mesh_.point(*(++fit_it));
const Point& p3 = mesh_.point(*(++fit_it));
viewer_->draw_triangles(proj(p1), proj(p2), proj(p3));
}
}
viewer_->end_draw_triangles();
}
void Viewer_instructor::draw_points() {
viewer_->begin_draw_points(view_params_.size_vertices);
for (auto vi : mesh_.vertex_range()) {
viewer_->set_size_point(view_params_.size_vertices);
set_color_vertex(vi);
viewer_->draw_points(proj(mesh_.point(vi)));
}
viewer_->end_draw_points();
}
void Viewer_instructor::draw_edge(const Point&, const Point&) { }
void Viewer_instructor::draw_point(const Point&) { }
/**
* set the right color of vertex/edge/triangle considering the view_params choice
*/
void Viewer_instructor::set_color_vertex(Vertex_handle vh) {
viewer_->set_color(Color(view_params_.light_edges, view_params_.light_edges, view_params_.light_edges));
}
void Viewer_instructor::set_color_edge(Edge_handle eh) {
viewer_->set_color(Color(view_params_.light_edges, view_params_.light_edges, view_params_.light_edges));
}
void Viewer_instructor::set_color_triangle(const Simplex& triangle) {
viewer_->set_color(Color(view_params_.light_triangles, view_params_.light_triangles, view_params_.light_triangles));
}
Viewer_instructor::Point_3
Viewer_instructor::proj(const Point& p) const {
return (*projector_)(p);
}
void Viewer_instructor::sceneChanged() {
UIDBG("sceneChanged");
viewer_->update_GL();
}
void Viewer_instructor::change_draw_vertices() {
view_params_.change_vertex_mode();
}
void Viewer_instructor::change_draw_edges() {
view_params_.change_edge_mode();
}
void Viewer_instructor::change_draw_triangles() {
view_params_.change_triangle_mode();
}
void Viewer_instructor::change_light() {
view_params_.light = !view_params_.light;
}
#include "Viewer_instructor.moc"
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