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Cavegen: Remove CavesRandomWalk dependency on Mapgen

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This commit is contained in:
kwolekr 2016-05-10 22:56:03 -04:00
parent 68b1cd8d1b
commit db1b4dc890
4 changed files with 98 additions and 38 deletions
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45
src/cavegen.h
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@ -25,17 +25,35 @@ with this program; if not, write to the Free Software Foundation, Inc.,
class GenerateNotifier;
/*
CavesRandomWalk is an implementation of a cave-digging algorithm that
operates on the principle of a "random walk" to approximate the stochiastic
activity of cavern development.
In summary, this algorithm works by carving a randomly sized tunnel in a
random direction a random amount of times, randomly varying in width.
All randomness here is uniformly distributed; alternative distributions have
not yet been implemented.
This algorithm is very fast, executing in less than 1ms on average for an
80x80x80 chunk of map on a modern processor.
*/
class CavesRandomWalk {
public:
Mapgen *mg;
MMVManip *vm;
INodeDefManager *ndef;
GenerateNotifier *gennotify;
s16 *heightmap;
// variables
// configurable parameters
int seed;
int water_level;
int lava_depth;
NoiseParams *np_caveliquids;
// intermediate state variables
u16 ystride;
s16 min_tunnel_diameter;
s16 max_tunnel_diameter;
u16 tunnel_routepoints;
@ -62,17 +80,26 @@ public:
content_t c_water_source;
content_t c_lava_source;
content_t c_ice;
int water_level;
u16 ystride;
// ndef is a mandatory parameter.
// If gennotify is NULL, generation events are not logged.
CavesRandomWalk(INodeDefManager *ndef,
GenerateNotifier *gennotify = NULL,
int seed = 0,
int water_level = 1,
content_t water_source = CONTENT_IGNORE,
content_t lava_source = CONTENT_IGNORE);
CavesRandomWalk(Mapgen *mg, PseudoRandom *ps);
void makeCave(v3s16 nmin, v3s16 nmax, int max_stone_height);
// vm and ps are mandatory parameters.
// If heightmap is NULL, the surface level at all points is assumed to
// be water_level.
void makeCave(MMVManip *vm, v3s16 nmin, v3s16 nmax,
PseudoRandom *ps, int max_stone_height, s16 *heightmap);
private:
void makeTunnel(bool dirswitch);
void carveRoute(v3f vec, float f, bool randomize_xz);
private:
inline bool isPosAboveSurface(v3s16 p);
};
@ -97,11 +124,13 @@ public:
PseudoRandom *ps;
PseudoRandom *ps2;
// configurable parameters
s16 *heightmap;
content_t c_water_source;
content_t c_lava_source;
int water_level;
// intermediate state variables
u16 ystride;
s16 min_tunnel_diameter;