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Do special sampling for layered biome exclusions

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Cubitect 2022-08-21 10:59:24 +02:00
parent 20ce76677f
commit 469f4d144b
1 changed files with 49 additions and 4 deletions
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53
finders.c
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@ -2845,6 +2845,17 @@ void restoreMap(filter_data_t *fd, Layer *l)
l->data = NULL;
}
static
int testExclusion(Layer *layer, int *cache, int x, int z, const BiomeFilter *bf)
{
int err = layer->getMap(layer, cache, x, z, 1, 1);
if (err)
return 0; // skip, but don't treat error as valid
int id = cache[0];
if (id < 128)
return (bf->biomeToExcl & (1ULL << id)) != 0;
return (bf->biomeToExclM & (1ULL << (id-128))) != 0;
}
int checkForBiomesAtLayer(
LayerStack * g,
@ -2859,6 +2870,9 @@ int checkForBiomesAtLayer(
)
{
Layer *l;
int *ids;
int ret, err;
int memsiz, mem1x1;
if (filter->flags & CFB_APPROX) // TODO: protoCheck for 1.6-
{
@ -2960,11 +2974,42 @@ L_has_proto_mushroom:
}
l = g->layers;
int *ids;
if (cache)
{
memsiz = 0;
ids = cache;
}
else
ids = (int*) calloc(getMinLayerCacheSize(entry, w, h), sizeof(int));
{
memsiz = getMinLayerCacheSize(entry, w, h);
ids = (int*) calloc(memsiz, sizeof(int));
}
if ((filter->biomeToExcl | filter->biomeToExclM) && w*h > 1)
{
err = 0;
if (memsiz == 0)
memsiz = getMinLayerCacheSize(entry, w, h);
mem1x1 = getMinLayerCacheSize(entry, 1, 1);
if (mem1x1 * 2 < memsiz)
{
setLayerSeed(entry, seed);
err = testExclusion(entry, ids, x+w/2, z+h/2, filter);
}
if (mem1x1 * 5 < memsiz)
{
if (!err) err = testExclusion(entry, ids, x, z, filter);
if (!err) err = testExclusion(entry, ids, x+w-1, z+h-1, filter);
if (!err) err = testExclusion(entry, ids, x, z+h-1, filter);
if (!err) err = testExclusion(entry, ids, x+w-1, z, filter);
}
if (err)
{
if (cache == NULL)
free(ids);
return 0;
}
}
filter_data_t fd[9];
swapMap(fd+0, filter, l+L_OCEAN_MIX_4, mapFilterOceanMix);
@ -2977,9 +3022,9 @@ L_has_proto_mushroom:
swapMap(fd+7, filter, l+L_MUSHROOM_256, mapFilterMushroom);
swapMap(fd+8, filter, l+L_SPECIAL_1024, mapFilterSpecial);
ret = 0;
setLayerSeed(entry, seed);
int err = entry->getMap(entry, ids, x, z, w, h);
int ret = 0;
err = entry->getMap(entry, ids, x, z, w, h);
if (err == 0)
{
uint64_t b = 0, m = 0;