本文整理汇总了C++中cg类的典型用法代码示例。如果您正苦于以下问题：C++ cg类的具体用法？C++ cg怎么用？C++ cg使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。
在下文中一共展示了cg类的15个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: TEST
TEST(Triangulation, one_line)
{
using cg::point_2;
std::vector<point_2> pts = boost::assign::list_of(point_2(0, 0))
(point_2(10, 0))
(point_2(20, 0))
(point_2(10, -10));
cg::cell<double> cell;
for (int i = 0; i < pts.size(); i++) {
auto ans = cell.get_triangulation();
for (const cg::triangle_2 & tr : ans) {
std::cout << tr[0] << tr[1] << tr[2] << std::endl;
}
cell.add_point(pts[i]);
}
std::cout << "Ans" << std::endl;
auto ans = cell.get_triangulation();
for (const cg::triangle_2 & tr : ans) {
std::cout << tr[0] << tr[1] << tr[2] << std::endl;
}
EXPECT_TRUE(true == true);
}示例2: TEST
TEST(convex_hull, simple_andrew4)
{
using cg::point_2;
std::vector<point_2> pts = boost::assign::list_of(point_2(1, 0))
(point_2(0, 1));
EXPECT_TRUE(is_convex_hull(pts.begin(), cg::andrew_hull(pts.begin(), pts.end()), pts.end()));
}示例3: TEST
TEST(orientation, counterclockwise2)
{
using cg::point_2;
std::vector<point_2> a = boost::assign::list_of(point_2(1, 0))
(point_2(3, 0))
(point_2(0, 2));
EXPECT_TRUE(cg::counterclockwise(cg::contour_2(a)));
}示例4: TEST
TEST(dynamic_convex_hull, without_deleting4)
{
using cg::point_2;
std::vector<point_2> pts = boost::assign::list_of(point_2(92.5535, 63.9831))
(point_2(48.2666, -2.07253))
(point_2(-87.6796, 74.2083))
(point_2(-41.6394, 42.1274))
(point_2(4.02735, 3.24309));
cg::dynamic_hull dh;
for (point_2 p : pts)
{
dh.add_point(p);
}
EXPECT_TRUE(is_convex_hull(pts.begin(), pts.end(), dh.get_hull().first, dh.get_hull().second));
}示例5: TEST
TEST(contains, triangle_point)
{
using cg::point_2;
cg::triangle_2 t(point_2(0, 0), point_2(1, 1), point_2(2, 0));
for (size_t l = 0; l != 3; ++l)
EXPECT_TRUE(cg::contains(t, t[l]));
EXPECT_TRUE(cg::contains(t, point_2(1, 0.5)));
EXPECT_TRUE(cg::contains(t, point_2(1, 0)));
EXPECT_TRUE(cg::contains(t, point_2(0.5, 0.5)));
EXPECT_TRUE(cg::contains(t, point_2(1.5, 0.5)));
EXPECT_FALSE(cg::contains(t, point_2(0, 1)));
EXPECT_FALSE(cg::contains(t, point_2(2, 1)));
EXPECT_FALSE(cg::contains(t, point_2(1, -1)));
}示例6: get_circumcircle
circle_2 get_circumcircle(triangle_2 const &t) const
{
if (t[0] == t[1] && t[1] == t[2])
return circle_2(t[0], 0);
if (orientation(t[0], t[1], t[2]) == cg::CG_COLLINEAR)
{
auto minmax = std::minmax({t[0], t[1], t[2]});
point_2 p1 = minmax.first;
point_2 p2 = minmax.second;
if (t[0] != t[1])
p2 = t[1];
else
p2 = t[2];
point_2 center = p1 + vector_2((p2.x - p1.x) / 2, (p2.y - p1.y) / 2);
double radius = segment_2(p1, p2).length() / 2;
return circle_2(center, radius);
}
double A1 = t[1].x - t[0].x;
double B1 = t[1].y - t[0].y;
double C1 = (t[1].x - t[0].x) * (t[1].x + t[0].x) / 2 + (t[1].y - t[0].y) * (t[1].y + t[0].y) / 2;
double A2 = t[2].x - t[0].x;
double B2 = t[2].y - t[0].y;
double C2 = (t[2].x - t[0].x) * (t[2].x + t[0].x) / 2 + (t[2].y - t[0].y) * (t[2].y + t[0].y) / 2;
point_2 center((C1 * B2 - C2 * B1) / (A1 * B2 - A2 * B1),
(A1 * C2 - A2 * C1) / (A1 * B2 - A2 * B1));
double radius = segment_2(center, t[0]).length();
return circle_2(center, radius);
}示例7: print
void print(cg::visualization::printer_type & p) const
{
p.corner_stream() << "double-click to clear." << cg::visualization::endl
<< "press mouse rbutton for add vertex (click to first point to complete contour)" << cg::visualization::endl
<< "move vertex with rbutton" << cg::visualization::endl
<< "eps:" << eps << cg::visualization::endl;
for (size_t i = 0; i < points_.size(); ++i)
{
p.global_stream((point_2f)points_[i] + vector_2f(5, 0)) << i;
}
}示例8: triangle_intersects_triangle_viewer
triangle_intersects_triangle_viewer()
: s_(point_2(-100, -100), point_2(50, 50), point_2(0, 50)),
t_(point_2(-50, -50), point_2(50, -50), point_2(-50, 50)),
rbutton_pressed_(false),
int_({})
{
int_ = cg::intersection(s_, t_);
}示例9: print
void print(cg::visualization::printer_type & p) const
{
p.corner_stream() << "double-click to clear." << cg::visualization::endl
<< "press mouse rbutton for add vertex (click to first point to complete contour)" << cg::visualization::endl
<< "move vertex with rbutton" << cg::visualization::endl
<< "yellow contour -- not ccw or convex" << cg::visualization::endl
<< "green contour -- contains cursor" << cg::visualization::endl
<< "red contour -- don't contains cursor" << cg::visualization::endl;
for (size_t i = 0; i < points_.size(); ++i)
{
p.global_stream((point_2f)points_[i] + vector_2f(5, 0)) << i;
}
}示例10: draw
void draw(cg::visualization::drawer_type & drawer) const
{
for (size_t idx = 0; idx < cur_contour; idx++)
{
contour const & cont = conts[idx];
drawer.set_color(Qt::red);
if (cg::counterclockwise(cont))
drawer.set_color(Qt::green);
for (size_t i = 0; i < cont.size(); i++)
{
size_t j = (i + 1) % cont.size();
cg::point_2 p1 = cont[i], p2 = cont[j];
drawer.draw_line(p1, p2);
}
}
if (in_building_)
{
drawer.set_color(Qt::white);
for (size_t i = 1; i < conts[cur_contour].size(); ++i)
{
drawer.draw_line(conts[cur_contour][i - 1], conts[cur_contour][i]);
}
} else
{
drawer.set_color(Qt::blue);
drawer.draw_point(center, 3);
contour_2 result = minkowski_convex_sum(contour_2(conts[0]), contour_2(reversed));
for (size_t i = 0; i < result.size(); ++i)
{
size_t j = (i + 1) % result.size();
drawer.draw_line(result[i], result[j]);
}
}
}示例11:
triangle_contains_point_viewer():
t_(point_2(0, 0),
point_2(100, 100),
point_2(200, 0)),
rbutton_pressed_(false)
{
}示例12: on_double_click
bool on_double_click(const point_2f & p)
{
chain.clear();
chain = {point_2(0, 0), point_2(20, 20), point_2(40, 40)};
current_vertex_.reset();
return true;
}示例13: wheelEvent
void main_window_t::wheelEvent(QWheelEvent * e)
{
double old_zoom = zoom_;
int delta = e->delta() / 8 / 15;
if (delta > 0)
{
for (int i = 0; i != delta; ++i)
zoom_ *= 1.1;
}
else if (delta < 0)
{
for (int i = 0; i != delta; --i)
zoom_ /= 1.1;
}
point_2f pos(e->pos().x(), e->pos().y());
point_2f sz(size().width() / 2, size().height() / 2);
vector_2f diff = pos - sz;
center_ += (old_zoom - zoom_) * vector_2f(diff.x, -diff.y);
center_ = limit(center_);
e->accept();
viewer_->on_move(limit(screen_to_global(e->pos())));
resize_impl(size().width(), size().height());
updateGL();
}示例14: resize_impl
void main_window_t::resize_impl(int screen_w, int screen_h)
{
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
vector_2f size = (zoom_ / 2) * vector_2f(screen_w, screen_h);
point_2f left_bottom = center_ + (-size);
point_2f right_top = center_ + size;
glOrtho(left_bottom.x, right_top.x, left_bottom.y, right_top.y, -1.0, 1.0);
glViewport(0, 0, screen_w, screen_h);
}示例15: on_press
bool on_press(const point_2f & p)
{
for (size_t i = 0; i < chain.size(); ++i)
{
if (fabs(chain[i].x - p.x) < 15 && fabs(chain[i].y - p.y) < 15)
{
current_vertex_ = i;
return true;
}
}
if(!current_vertex_)
chain.push_back(point_2(p.x, p.y));
return true;
}