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First basic estimate for determining grass blocks for a better spawn approximation.

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This commit is contained in:
Cubitect 2018-07-29 15:12:52 +02:00
parent e4b986ca94
commit ecd8809d89
1 changed files with 42 additions and 6 deletions
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48
finders.c
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@ -1079,11 +1079,47 @@ int findStrongholds(const int mcversion, LayerStack *g, int *cache,
}
/* TODO: Estimate whether the given positions could be spawn based on biomes. */
static int canCoordinateBeSpawn(LayerStack *g, int *cache, Pos pos)
static double getGrassProbability(int64_t seed, int biome, int x, int z)
{
return 1;
// TODO: Use ChunkGeneratorOverworld.generateHeightmap for better estimate.
// TODO: Try to determine the actual probabilities and build a statistic.
switch (biome)
{
case plains: return 1.0;
case extremeHills: return 0.8; // height dependent
case forest: return 1.0;
case taiga: return 1.0;
case swampland: return 0.6; // height dependent
case river: return 0.2;
case beach: return 0.1;
case forestHills: return 1.0;
case taigaHills: return 1.0;
case extremeHillsEdge: return 1.0; // height dependent
case jungle: return 1.0;
case jungleHills: return 1.0;
case jungleEdge: return 1.0;
case birchForest: return 1.0;
case birchForestHills: return 1.0;
case roofedForest: return 0.9;
case coldTaiga: return 0.1; // below trees
case coldTaigaHills: return 0.1; // below trees
case megaTaiga: return 0.6;
case megaTaigaHills: return 0.6;
case extremeHillsPlus: return 0.2; // height dependent
case savanna: return 1.0;
case savannaPlateau: return 1.0;
case mesaPlateau_F: return 0.1; // height dependent
case mesaPlateau: return 0.1; // height dependent
// NOTE: in rare circumstances you can get also get grass islands that are
// completely ocean variants...
default: return 0;
}
}
static int canCoordinateBeSpawn(const int64_t seed, LayerStack *g, int *cache, Pos pos)
{
int biome = getBiomeAtPos(*g, pos);
return getGrassProbability(seed, biome, pos.x, pos.z) >= 0.5;
}
static int* getValidSpawnBiomes()
@ -1140,7 +1176,7 @@ Pos getSpawn(const int mcversion, LayerStack *g, int *cache, int64_t worldSeed)
for (int i3 = cz; i3 <= cz+15; i3++)
{
Pos pos = {i2, i3};
if (canCoordinateBeSpawn(g, cache, pos))
if (canCoordinateBeSpawn(worldSeed, g, cache, pos))
{
return pos;
}
@ -1160,7 +1196,7 @@ Pos getSpawn(const int mcversion, LayerStack *g, int *cache, int64_t worldSeed)
}
else
{
for (i = 0; i < 1000 && !canCoordinateBeSpawn(g, cache, spawn); i++)
for (i = 0; i < 1000 && !canCoordinateBeSpawn(worldSeed, g, cache, spawn); i++)
{
spawn.x += nextInt(&worldSeed, 64) - nextInt(&worldSeed, 64);
spawn.z += nextInt(&worldSeed, 64) - nextInt(&worldSeed, 64);