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Mapgen: Fix light in tunnels at mapchunk borders

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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 commit is contained in:
paramat 2016-03-13 07:56:27 +00:00
parent c0b6986e38
commit bb2ee54d3b
5 changed files with 30 additions and 0 deletions
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6
src/mapgen_v5.cpp
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@ -519,6 +519,12 @@ void MapgenV5::generateCaves(int max_stone_y)
for (s16 y = node_min.Y - 1; y <= node_max.Y + 1; y++) {
u32 vi = vm->m_area.index(node_min.X, y, z);
for (s16 x = node_min.X; x <= node_max.X; x++, vi++, index++) {
// 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.
if (y > node_max.Y)
continue;
float d1 = contour(noise_cave1->result[index]);
float d2 = contour(noise_cave2->result[index]);
if (d1 * d2 > 0.125f) {