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Claude
58ad6e3008
encode_vertex() computed exactly the same thing as encode_quadkey(), so there is no reason to have both. Give encode_quadkey() the branch-free implementation, which also speeds up the default encode_index, and have the shared node code call it directly. The unit test now compares it against the old bit-at-a-time loop and checks that decode_quadkey() reverses it. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01P2nBqZisxNQfmEmon3vE9v
31 lines
1.2 KiB
C++
31 lines
1.2 KiB
C++
#ifndef PROJECTION_HPP
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#define PROJECTION_HPP
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void lonlat2tile(double lon, double lat, int zoom, long long *x, long long *y);
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void epsg3857totile(double ix, double iy, int zoom, long long *x, long long *y);
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void tile2lonlat(long long x, long long y, int zoom, double *lon, double *lat);
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void tiletoepsg3857(long long x, long long y, int zoom, double *ox, double *oy);
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void set_projection_or_exit(const char *optarg);
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struct projection {
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const char *name;
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void (*project)(double ix, double iy, int zoom, long long *ox, long long *oy);
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void (*unproject)(long long ix, long long iy, int zoom, double *ox, double *oy);
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const char *alias;
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};
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extern struct projection *projection;
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extern struct projection projections[];
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extern unsigned long long (*encode_index)(unsigned int wx, unsigned int wy);
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extern void (*decode_index)(unsigned long long index, unsigned *wx, unsigned *wy);
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unsigned long long encode_quadkey(unsigned int wx, unsigned int wy);
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void decode_quadkey(unsigned long long index, unsigned *wx, unsigned *wy);
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unsigned long long encode_hilbert(unsigned int wx, unsigned int wy);
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void decode_hilbert(unsigned long long index, unsigned *wx, unsigned *wy);
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#endif
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