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Cavegen: Move V5-style caves to CavesNoiseIntersection

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kwolekr 2016-05-19 03:40:22 -04:00
parent 6151f7bc4b
commit 548d99bb45
9 changed files with 151 additions and 82 deletions
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52
src/mapgen.cpp
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@ -542,56 +542,10 @@ void MapgenBasic::generateCaves(s16 max_stone_y, s16 large_cave_depth)
if (max_stone_y < node_min.Y)
return;
noise_cave1->perlinMap3D(node_min.X, node_min.Y - 1, node_min.Z);
noise_cave2->perlinMap3D(node_min.X, node_min.Y - 1, node_min.Z);
CavesNoiseIntersection caves_noise(ndef, bmgr, csize,
&np_cave1, &np_cave2, seed, cave_width);
v3s16 em = vm->m_area.getExtent();
u32 index2d = 0;
for (s16 z = node_min.Z; z <= node_max.Z; z++)
for (s16 x = node_min.X; x <= node_max.X; x++, index2d++) {
bool column_is_open = false; // Is column open to overground
bool is_tunnel = false; // Is tunnel or tunnel floor
u32 vi = vm->m_area.index(x, node_max.Y, z);
u32 index3d = (z - node_min.Z) * zstride_1d + csize.Y * ystride +
(x - node_min.X);
// Biome of column
Biome *biome = (Biome *)bmgr->getRaw(biomemap[index2d]);
// Don't excavate the overgenerated stone at node_max.Y + 1,
// this creates a 'roof' over the tunnel, preventing light in
// tunnels at mapchunk borders when generating mapchunks upwards.
// This 'roof' is removed when the mapchunk above is generated.
for (s16 y = node_max.Y; y >= node_min.Y - 1; y--,
index3d -= ystride,
vm->m_area.add_y(em, vi, -1)) {
content_t c = vm->m_data[vi].getContent();
if (c == CONTENT_AIR || c == biome->c_water_top ||
c == biome->c_water) {
column_is_open = true;
continue;
}
// Ground
float d1 = contour(noise_cave1->result[index3d]);
float d2 = contour(noise_cave2->result[index3d]);
if (d1 * d2 > cave_width && ndef->get(c).is_ground_content) {
// In tunnel and ground content, excavate
vm->m_data[vi] = MapNode(CONTENT_AIR);
is_tunnel = true;
} else {
// Not in tunnel or not ground content
if (is_tunnel && column_is_open &&
(c == biome->c_filler || c == biome->c_stone))
// Tunnel entrance floor
vm->m_data[vi] = MapNode(biome->c_top);
column_is_open = false;
is_tunnel = false;
}
}
}
caves_noise.generateCaves(vm, node_min, node_max, biomemap);
if (node_max.Y > large_cave_depth)
return;