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Cavegen: Avoid unsupported biome 'top' or 'filler' nodes 

For 3D noise tunnels only, replace unsupported biome 'top' and 'filler'
nodes in tunnel roof with the defined biome 'stone'.
This makes terrain created by 3D noise tunnels consistent with the rest
of mapgen, which does exactly the same in this situation.
This commit is contained in:
paramat 2017-09-11 21:23:43 +01:00 committed by paramat
parent a9d43a0471
commit 7640749d68
1 changed files with 16 additions and 1 deletions
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17
src/cavegen.cpp
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@ -81,6 +81,7 @@ void CavesNoiseIntersection::generateCaves(MMVManip *vm,
bool column_is_open = false; // Is column open to overground
bool is_under_river = false; // Is column under river water
bool is_under_tunnel = false; // Is tunnel or is under tunnel
bool is_top_filler_above = false; // Is top or filler above node
// Indexes at column top
u32 vi = vm->m_area.index(x, nmax.Y, z);
u32 index3d = (z - nmin.Z) * m_zstride_1d + m_csize.Y * m_ystride +
@ -98,19 +99,22 @@ void CavesNoiseIntersection::generateCaves(MMVManip *vm,
for (s16 y = nmax.Y; y >= nmin.Y - 1; y--,
index3d -= m_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;
is_top_filler_above = false;
continue;
}
if (c == biome->c_river_water) {
column_is_open = true;
is_under_river = true;
is_top_filler_above = false;
continue;
}
// Ground
float d1 = contour(noise_cave1->result[index3d]);
float d2 = contour(noise_cave2->result[index3d]);
@ -119,12 +123,17 @@ void CavesNoiseIntersection::generateCaves(MMVManip *vm,
// In tunnel and ground content, excavate
vm->m_data[vi] = MapNode(CONTENT_AIR);
is_under_tunnel = true;
// If tunnel roof is top or filler, replace with stone
if (is_top_filler_above)
vm->m_data[vi + em.X] = MapNode(biome->c_stone);
is_top_filler_above = false;
} else if (column_is_open && is_under_tunnel &&
(c == biome->c_stone || c == biome->c_filler)) {
// Tunnel entrance floor, place biome surface nodes
if (is_under_river) {
if (nplaced < depth_riverbed) {
vm->m_data[vi] = MapNode(biome->c_riverbed);
is_top_filler_above = true;
nplaced++;
} else {
// Disable top/filler placement
@ -134,9 +143,11 @@ void CavesNoiseIntersection::generateCaves(MMVManip *vm,
}
} else if (nplaced < depth_top) {
vm->m_data[vi] = MapNode(biome->c_top);
is_top_filler_above = true;
nplaced++;
} else if (nplaced < base_filler) {
vm->m_data[vi] = MapNode(biome->c_filler);
is_top_filler_above = true;
nplaced++;
} else {
// Disable top/filler placement
@ -145,6 +156,10 @@ void CavesNoiseIntersection::generateCaves(MMVManip *vm,
}
} else {
// Not tunnel or tunnel entrance floor
// Check node for possible replacing with stone for tunnel roof
if (c == biome->c_top || c == biome->c_filler)
is_top_filler_above = true;
column_is_open = false;
}
}