mirror of
https://github.com/systemed/tilemaker
synced 2026-02-27 07:12:11 +01:00
bf4f3f35ad
* `boost::range::sort` conflicts with `boost::sort`. Implementations are moved into a dedicated .cpp file. * `boost::system` is a header only library now and the stub is removed
42 lines
No EOL
1.2 KiB
C++
42 lines
No EOL
1.2 KiB
C++
#ifndef _TILE_DATA_BASE_H
|
|
#define _TILE_DATA_BASE_H
|
|
|
|
#include <cstdint>
|
|
#include "output_object.h"
|
|
|
|
#define TILE_DATA_ID_SIZE 34
|
|
|
|
// We cluster output objects by z6 tile
|
|
#define CLUSTER_ZOOM 6
|
|
#define CLUSTER_ZOOM_WIDTH (1 << CLUSTER_ZOOM)
|
|
#define CLUSTER_ZOOM_AREA (CLUSTER_ZOOM_WIDTH * CLUSTER_ZOOM_WIDTH)
|
|
|
|
// TileDataSource indexes which tiles have objects in them. The indexed zoom
|
|
// is at most z14; we'll clamp to z14 if the base zoom is higher than z14.
|
|
//
|
|
// As a result, we need at most 15 bits to store an X/Y coordinate. For efficiency,
|
|
// we bucket the world into 4,096 z6 tiles, which each contain some number of
|
|
// z14 objects. This lets us use only 8 bits to store an X/Y coordinate.
|
|
//
|
|
// Because index zoom is lower than base zoom in the case where base zoom is
|
|
// z15+, we'll get false positives when looking up objects in the index,
|
|
// since, e.g., a single z14 tile covers 4 z15 tiles.
|
|
//
|
|
// This is OK: when writing the z15 tile, there's a clipping step that will filter
|
|
// out the false positives.
|
|
typedef uint8_t Z6Offset;
|
|
|
|
struct OutputObjectXY {
|
|
OutputObject oo;
|
|
Z6Offset x;
|
|
Z6Offset y;
|
|
};
|
|
|
|
struct OutputObjectXYID {
|
|
OutputObject oo;
|
|
Z6Offset x;
|
|
Z6Offset y;
|
|
uint64_t id;
|
|
};
|
|
|
|
#endif //_TILE_DATA_BASE_H
|