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add todo list, try to compile as C++ (untested), tweak data structure

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This commit is contained in:
Sean Barrett 2016-04-15 21:40:37 -07:00
parent 31bc5d1ecc
commit d32dc9f43a
1 changed files with 23 additions and 2 deletions
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25
stb_connected_components.h
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@ -1,4 +1,4 @@
// stb_connected_components - v0.90 - public domain connected components on grids // stb_connected_components - v0.91 - public domain connected components on grids
// http://github.com/nothings/stb // http://github.com/nothings/stb
// //
// Finds connected components on 2D grids for testing reachability between // Finds connected components on 2D grids for testing reachability between
@ -23,6 +23,19 @@
// license: you are granted a perpetual, irrevocable license to copy, modify, // license: you are granted a perpetual, irrevocable license to copy, modify,
// publish, and distribute this file as you see fit. // publish, and distribute this file as you see fit.
// //
//
// TODO:
// - test C++ compile
// - better API documentation
// - internals documentation (including algorithm)
// - try re-integrating naive algorithm & compare performance
// - batching (keep data structure w/ dirty clusters)
// - function for setting a grid of squares at once (just use batching)
// - shrink data by storing only, say, 2X max exits
// (instead of max exits per clump), and repack cluster
// if it runs out (possibly by just rebuilding from scratch,
// could even use dirty-cluster data structure)
// should reduce 1Kx1K from ~66MB to ~8MB
#ifndef INCLUDE_STB_CONNECTED_COMPONENTS_H #ifndef INCLUDE_STB_CONNECTED_COMPONENTS_H
#define INCLUDE_STB_CONNECTED_COMPONENTS_H #define INCLUDE_STB_CONNECTED_COMPONENTS_H
@ -32,6 +45,10 @@
typedef struct st_stbcc_grid stbcc_grid; typedef struct st_stbcc_grid stbcc_grid;
#ifdef __cplusplus
extern "C" {
#endif
////////////////////////////////////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////////////////////////////////////
// //
// initialization // initialization
@ -69,6 +86,10 @@ extern int stbcc_query_grid_open(stbcc_grid *g, int x, int y);
// small, you'll need a hash table or something to remap it (or just use // small, you'll need a hash table or something to remap it (or just use
extern unsigned int stbcc_get_unique_id(stbcc_grid *g, int x, int y); extern unsigned int stbcc_get_unique_id(stbcc_grid *g, int x, int y);
#ifdef __cplusplus
}
#endif
#endif // INCLUDE_STB_CONNECTED_COMPONENTS_H #endif // INCLUDE_STB_CONNECTED_COMPONENTS_H
#ifdef STB_CONNECTED_COMPONENTS_IMPLEMENTATION #ifdef STB_CONNECTED_COMPONENTS_IMPLEMENTATION
@ -148,7 +169,7 @@ typedef union
typedef struct typedef struct
{ {
stbcc__global_clumpid global_label; stbcc__global_clumpid global_label;
unsigned char num_adjacent; unsigned short num_adjacent;
stbcc__relative_clumpid adjacent_clumps[STBCC__MAX_EXITS_PER_CLUMP]; stbcc__relative_clumpid adjacent_clumps[STBCC__MAX_EXITS_PER_CLUMP];
} stbcc__clump; } stbcc__clump;