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Cavegen y biome check (#13472)

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Riley Adams 2023-06-05 05:59:22 -04:00 • committed by GitHub
parent 1ef9fc9d1f
commit 29b7aea38b
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5 changed files with 83 additions and 7 deletions
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24
src/mapgen/cavegen.cpp
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@ -38,14 +38,16 @@ static NoiseParams nparams_caveliquids(0, 1, v3f(150.0, 150.0, 150.0), 776, 3, 0
////
CavesNoiseIntersection::CavesNoiseIntersection(
const NodeDefManager *nodedef, BiomeManager *biomemgr, v3s16 chunksize,
const NodeDefManager *nodedef, BiomeManager *biomemgr, BiomeGen *biomegen, v3s16 chunksize,
NoiseParams *np_cave1, NoiseParams *np_cave2, s32 seed, float cave_width)
{
assert(nodedef);
assert(biomemgr);
assert(biomegen);
m_ndef = nodedef;
m_bmgr = biomemgr;
m_bmgn = biomegen;
m_csize = chunksize;
m_cave_width = cave_width;
@ -80,6 +82,8 @@ void CavesNoiseIntersection::generateCaves(MMVManip *vm,
const v3s16 &em = vm->m_area.getExtent();
u32 index2d = 0; // Biomemap index
s16 *biome_transitions = m_bmgn->getBiomeTransitions();
for (s16 z = nmin.Z; z <= nmax.Z; z++)
for (s16 x = nmin.X; x <= nmax.X; x++, index2d++) {
bool column_is_open = false; // Is column open to overground
@ -96,6 +100,10 @@ void CavesNoiseIntersection::generateCaves(MMVManip *vm,
u16 base_filler = depth_top + biome->depth_filler;
u16 depth_riverbed = biome->depth_riverbed;
u16 nplaced = 0;
int cur_biome_depth = 0;
s16 biome_y_min = biome_transitions[cur_biome_depth];
// Don't excavate the overgenerated stone at nmax.Y + 1,
// this creates a 'roof' over the tunnel, preventing light in
// tunnels at mapchunk borders when generating mapchunks upwards.
@ -103,6 +111,20 @@ void CavesNoiseIntersection::generateCaves(MMVManip *vm,
for (s16 y = nmax.Y; y >= nmin.Y - 1; y--,
index3d -= m_ystride,
VoxelArea::add_y(em, vi, -1)) {
// We need this check to make sure that biomes don't generate too far down
if (y < biome_y_min) {
biome = m_bmgn->getBiomeAtIndex(index2d, v3s16(x, y, z));
// Finding the height of the next biome
// On first iteration this may loop a couple times after than it should just run once
while (y < biome_y_min) {
biome_y_min = biome_transitions[++cur_biome_depth];
}
/*if (x == nmin.X && z == nmin.Z)
printf("Cave: check @ %i -> %s -> again at %i\n", y, biome->name.c_str(), biome_y_min);*/
}
content_t c = vm->m_data[vi].getContent();
if (c == CONTENT_AIR || c == biome->c_water_top ||