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Decoration API: Add flag for placement on liquid surface

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Add findLiquidSurface() function to mapgen.cpp
Update lua_api.txt
This commit is contained in:
paramat
2015-10-21 08:51:59 +01:00
parent c32847838d
commit 59fa117d13
5 changed files with 38 additions and 8 deletions
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20
src/mapgen.cpp
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@@ -161,6 +161,26 @@ s16 Mapgen::findGroundLevel(v2s16 p2d, s16 ymin, s16 ymax)
}
// Returns -MAX_MAP_GENERATION_LIMIT if not found or if ground is found first
s16 Mapgen::findLiquidSurface(v2s16 p2d, s16 ymin, s16 ymax)
{
v3s16 em = vm->m_area.getExtent();
u32 i = vm->m_area.index(p2d.X, ymax, p2d.Y);
s16 y;
for (y = ymax; y >= ymin; y--) {
MapNode &n = vm->m_data[i];
if (ndef->get(n).walkable)
return -MAX_MAP_GENERATION_LIMIT;
else if (ndef->get(n).isLiquid())
break;
vm->m_area.add_y(em, i, -1);
}
return (y >= ymin) ? y : -MAX_MAP_GENERATION_LIMIT;
}
void Mapgen::updateHeightmap(v3s16 nmin, v3s16 nmax)
{
if (!heightmap)