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Mgvalleys / cavegen: Place riverbed nodes under river water 

When a CavesNoiseIntersection tunnel intersects a river place biome
'riverbed' nodes in tunnel entrance instead of biome 'top' nodes.
This commit is contained in:
paramat 2016-07-20 00:23:08 +01:00
parent 97c763158c
commit 2ba8ad1dfe
2 changed files with 20 additions and 9 deletions
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13
src/cavegen.cpp
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@ -79,6 +79,7 @@ void CavesNoiseIntersection::generateCaves(MMVManip *vm,
for (s16 z = nmin.Z; z <= nmax.Z; z++)
for (s16 x = nmin.X; x <= nmax.X; x++, index2d++) {
bool column_is_open = false; // Is column open to overground
bool is_under_river = false; // Is column under river water
bool is_tunnel = false; // Is tunnel or tunnel floor
u32 vi = vm->m_area.index(x, nmax.Y, z);
u32 index3d = (z - nmin.Z) * m_zstride_1d + m_csize.Y * m_ystride +
@ -99,6 +100,10 @@ void CavesNoiseIntersection::generateCaves(MMVManip *vm,
c == biome->c_water) {
column_is_open = true;
continue;
} else if (c == biome->c_river_water) {
column_is_open = true;
is_under_river = true;
continue;
}
// Ground
float d1 = contour(noise_cave1->result[index3d]);
@ -111,9 +116,13 @@ void CavesNoiseIntersection::generateCaves(MMVManip *vm,
} else {
// Not in tunnel or not ground content
if (is_tunnel && column_is_open &&
(c == biome->c_filler || c == biome->c_stone))
(c == biome->c_filler || c == biome->c_stone)) {
// Tunnel entrance floor
vm->m_data[vi] = MapNode(biome->c_top);
if (is_under_river)
vm->m_data[vi] = MapNode(biome->c_riverbed);
else
vm->m_data[vi] = MapNode(biome->c_top);
}
column_is_open = false;
is_tunnel = false;

16
src/mapgen_valleys.cpp
View File

@ -665,6 +665,7 @@ void MapgenValleys::generateCaves(s16 max_stone_y, s16 large_cave_depth)
for (s16 x = node_min.X; x <= node_max.X; x++, index_2d++) {
Biome *biome = (Biome *)m_bmgr->getRaw(biomemap[index_2d]);
bool tunnel_air_above = false;
bool is_under_river = false;
bool underground = false;
u32 index_data = vm->m_area.index(x, node_max.Y, z);
u32 index_3d = (z - node_min.Z) * zstride_1d + csize.Y * ystride + (x - node_min.X);
@ -696,14 +697,13 @@ void MapgenValleys::generateCaves(s16 max_stone_y, s16 large_cave_depth)
}
content_t c = vm->m_data[index_data].getContent();
// Detect river water to place riverbed nodes in tunnels
if (c == biome->c_river_water)
is_under_river = true;
float d1 = contour(noise_cave1->result[index_3d]);
float d2 = contour(noise_cave2->result[index_3d]);
// River water is not set as ground content
// in the default game. This can produce strange results
// when a tunnel undercuts a river. However, that's not for
// the mapgen to correct. Fix it in lua.
if (d1 * d2 > cave_width && ndef->get(c).is_ground_content) {
// in a tunnel
vm->m_data[index_data] = n_air;
@ -716,8 +716,10 @@ void MapgenValleys::generateCaves(s16 max_stone_y, s16 large_cave_depth)
vm->m_area.add_y(em, j, 1);
if (sr > terrain - y) {
// Put dirt in tunnels near the surface.
if (underground)
// Put biome nodes in tunnels near the surface
if (is_under_river)
vm->m_data[index_data] = MapNode(biome->c_riverbed);
else if (underground)
vm->m_data[index_data] = MapNode(biome->c_filler);
else
vm->m_data[index_data] = MapNode(biome->c_top);