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Mgv6: Add heightmap. Do not make large caves that are entirely above ground

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paramat 2015-03-01 01:30:47 +00:00
parent 1a175c6982
commit 773aa8c57b
2 changed files with 35 additions and 0 deletions
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30
src/cavegen.cpp
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@ -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;