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Mgv6: Add heightmap. Do not make large caves that are entirely above …
…ground
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paramat committed Mar 2, 2015
1 parent 1a175c6 commit 773aa8c57b70dd85273cb61286f8be577b4ca3aa
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Showing 2 changed files with 35 additions and 0 deletions.
@@ -173,6 +173,36 @@ void CaveV6::makeTunnel(bool dirswitch) {
);
}

// Do not make large caves that are entirely above ground.
// It is only necessary to check the startpoint and endpoint.
if (large_cave) {
v3s16 orpi(orp.X, orp.Y, orp.Z);
v3s16 veci(vec.X, vec.Y, vec.Z);
s16 h1;
s16 h2;

v3s16 p1 = orpi + veci + of + rs / 2;
if (p1.Z >= node_min.Z && p1.Z <= node_max.Z &&
p1.X >= node_min.X && p1.X <= node_max.X) {
u32 index1 = (p1.Z - node_min.Z) * mg->ystride + (p1.X - node_min.X);
h1 = mg->heightmap[index1];
} else {
h1 = water_level; // If not in heightmap
}

v3s16 p2 = orpi + of + rs / 2;
if (p2.Z >= node_min.Z && p2.Z <= node_max.Z &&
p2.X >= node_min.X && p2.X <= node_max.X) {
u32 index2 = (p2.Z - node_min.Z) * mg->ystride + (p2.X - node_min.X);
h2 = mg->heightmap[index2];
} else {
h2 = water_level;
}

if (p1.Y > h1 && p2.Y > h2) // If startpoint and endpoint are above ground
return;
}

vec += main_direction;

v3f rp = orp + vec;
@@ -55,6 +55,8 @@ MapgenV6::MapgenV6(int mapgenid, MapgenParams *params, EmergeManager *emerge)
this->m_emerge = emerge;
this->ystride = csize.X; //////fix this

this->heightmap = new s16[csize.X * csize.Z];

MapgenV6Params *sp = (MapgenV6Params *)params->sparams;
this->spflags = sp->spflags;
this->freq_desert = sp->freq_desert;
@@ -498,6 +500,9 @@ void MapgenV6::makeChunk(BlockMakeData *data)

}

// Create heightmap after mudflow
updateHeightmap(node_min, node_max);

// Add dungeons
if ((flags & MG_DUNGEONS) && (stone_surface_max_y >= node_min.Y)) {
DungeonParams dp;

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