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use a custom struct for Tile IDs

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This commit is contained in:
Konstantin Käfer
2014-03-12 16:42:37 +01:00
parent 8fd4d855d5
commit 86e6e6bed8
7 changed files with 53 additions and 32 deletions
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8
src/map/coverage.cpp
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@@ -64,15 +64,15 @@ void _scanTriangle(const llmr::vec2<double> a, const llmr::vec2<double> b, const
if (bc.dy) _scanSpans(ca, bc, ymin, ymax, scanLine);
}
std::forward_list<llmr::vec3<int32_t>> llmr::covering_tiles(int32_t zoom, const box& points) {
std::forward_list<llmr::Tile::ID> llmr::covering_tiles(int32_t zoom, const box& points) {
int32_t dim = pow(2, zoom);
std::forward_list<vec3<int32_t>> tiles;
std::forward_list<llmr::Tile::ID> tiles;
auto scanLine = [&tiles, zoom](int32_t x0, int32_t x1, int32_t y, int32_t ymax) {
int32_t x;
if (y >= 0 && y <= ymax) {
for (x = x0; x < x1; x++) {
tiles.emplace_front(x, y, zoom);
tiles.emplace_front(zoom, x, y);
}
}
};
@@ -85,7 +85,7 @@ std::forward_list<llmr::vec3<int32_t>> llmr::covering_tiles(int32_t zoom, const
_scanTriangle(points.br, points.bl, points.tl, 0, dim, scanLine);
const vec2<double>& center = points.center;
tiles.sort([&center](const vec3<int32_t>& a, const vec3<int32_t>& b) {
tiles.sort([&center](const Tile::ID& a, const Tile::ID& b) {
// Sorts by distance from the box center
return fabs(a.x - center.x) + fabs(a.y - center.y) <
fabs(b.x - center.x) + fabs(b.y - center.y);