tei/MapLibreParticleLab
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

fix Tile::parent() for negative x coords

Browse Source
This commit is contained in:
Konstantin Käfer
2014-03-21 13:17:42 +01:00
parent 4dc6aa9aec
commit a4cda4ce20
2 changed files with 9 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
src/map/tile.cpp
View File

@@ -8,15 +8,14 @@ Tile::Tile(const ID& id)
: id(id) {
}
Tile::ID Tile::ID::parent(int32_t parent_z) const {
Tile::ID Tile::ID::parent(int8_t parent_z) const {
assert(parent_z < z);
ID pos(z, x, y);
while (pos.z > parent_z) {
--pos.z;
pos.x = floor(pos.x / 2);
pos.y = floor(pos.y / 2);
}
return pos;
int32_t dim = pow(2, z - parent_z);
return Tile::ID{
static_cast<int8_t>(parent_z),
static_cast<int32_t>(floor((float)x / dim)),
static_cast<int32_t>(y / dim)
};
}
std::forward_list<Tile::ID> Tile::ID::children(int32_t child_z) const {