std::vector<gns::point> local_map::get_points() const {
std::vector<gns::point> out;
for (unsigned int i = 0; i < m_grid.size(); i++)
for (unsigned int j = 0; j < m_grid.size(); j++)
if (m_grid(i, j) == cell::NONFREE)
out.push_back(get_change().toPoint(pointi(i, j)));
return out;
}
void fill(grid<400>& g, pointi c, int r) {
std::queue<pointi> open;
std::set<pointi> close;
open.push(pointi(0, 0));
while (not open.empty()) {
pointi p = open.front();
open.pop();
if (close.find(p) != close.end())
continue;
close.insert(p);
if (g.valid(c.x + p.x, c.y + p.y) and (p.x * p.x + p.y * p.y <= r * r)) {
g(c.x + p.x, c.y + p.y) = cell::FREE;
open.push(pointi(p.x + 1, p.y));
open.push(pointi(p.x - 1, p.y));
open.push(pointi(p.x, p.y + 1));
open.push(pointi(p.x, p.y - 1));
}
}
}
bool pack_rectangle(int* px, int* py, int width, int height)
// Find a spot for the rectangle in the current cache image.
// Return true if there's a spot; false if there's no room.
{
// Nice algo, due to JARE:
//
// * keep a list of "candidate points"; initialize it with {0,0}
//
// * each time we add a rect, add its lower-left and
// upper-right as candidate points.
//
// * search the candidate points only, when looking
// for a good spot. If we find a good one, also try
// scanning left or up as well; sometimes this can
// close some open space.
//
// * when we use a candidate point, remove it from the list.
// Consider candidate spots.
for (int i = 0, n = s_anchor_points.size(); i < n; i++)
{
const pointi& p = s_anchor_points[i];
recti r(p.m_x, p.m_x + width, p.m_y, p.m_y + height);
// Is this spot any good?
if (is_rect_available(r))
{
// Good spot. Scan left to see if we can tighten it up.
while (r.m_x_min > 0)
{
recti r2(r.m_x_min - 1, r.m_x_min - 1 + width, r.m_y_min, r.m_y_min + height);
if (is_rect_available(r2))
{
// Shift left.
r = r2;
}
else
{
// Not clear; stop scanning.
break;
}
}
// Mark our covered rect; remove newly covered anchors.
add_cover_rect(r);
// Found our desired spot. Add new
// candidate points to the anchor list.
add_anchor_point(pointi(r.m_x_min, r.m_y_max)); // lower-left
add_anchor_point(pointi(r.m_x_max, r.m_y_min)); // upper-right
*px = r.m_x_min;
*py = r.m_y_min;
return true;
}
}
// Couldn't find a good spot.
return false;
}