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Implement API to create empty VoxelManip

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This commit is contained in:
sfan5 2025-05-25 15:43:59 +02:00
parent 6274a8dec4
commit aa1bab2156
3 changed files with 62 additions and 17 deletions
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45
src/script/lua_api/l_vmanip.cpp
View file

@ -44,7 +44,40 @@ int LuaVoxelManip::l_read_from_map(lua_State *L)
push_v3s16(L, vm->m_area.MinEdge);
push_v3s16(L, vm->m_area.MaxEdge);
return 2;
}
int LuaVoxelManip::l_initialize(lua_State *L)
{
MAP_LOCK_REQUIRED;
LuaVoxelManip *o = checkObject<LuaVoxelManip>(L, 1);
MMVManip *vm = o->vm;
if (o->is_mapgen_vm)
throw LuaError("Cannot modify mapgen VoxelManip object");
VoxelArea area;
{
v3s16 bp1 = getNodeBlockPos(check_v3s16(L, 2));
v3s16 bp2 = getNodeBlockPos(check_v3s16(L, 3));
sortBoxVerticies(bp1, bp2);
area = VoxelArea(bp1 * MAP_BLOCKSIZE, (bp2+1) * MAP_BLOCKSIZE - v3s16(1));
}
assert(!area.hasEmptyExtent());
vm->clear();
vm->addArea(area);
if (lua_istable(L, 4)) {
MapNode n = readnode(L, 4);
const u32 volume = vm->m_area.getVolume();
for (u32 i = 0; i != volume; i++)
vm->m_data[i] = n;
vm->clearFlags(vm->m_area, VOXELFLAG_NO_DATA);
}
push_v3s16(L, vm->m_area.MinEdge);
push_v3s16(L, vm->m_area.MaxEdge);
return 2;
}
@ -93,11 +126,12 @@ int LuaVoxelManip::l_set_data(lua_State *L)
lua_pop(L, 1);
}
// FIXME: in theory we should clear VOXELFLAG_NO_DATA here
// However there is no way to tell which values Lua code has intended to set
// (if they were VOXELFLAG_NO_DATA before), and which were just not touched.
// In practice this doesn't cause problems because read_from_map() will cause
// all covered blocks to be loaded anyway.
// Mark all data as present, since we just got it from Lua
// Note that we can't tell if the caller intended to put CONTENT_IGNORE or
// is just repeating the dummy values we push in l_get_data() in case
// VOXELFLAG_NO_DATA is set. In practice this doesn't matter since ignore
// isn't written back to the map anyway.
vm->clearFlags(vm->m_area, VOXELFLAG_NO_DATA);
return 0;
}
@ -449,6 +483,7 @@ void LuaVoxelManip::Register(lua_State *L)
const char LuaVoxelManip::className[] = "VoxelManip";
const luaL_Reg LuaVoxelManip::methods[] = {
luamethod(LuaVoxelManip, read_from_map),
luamethod(LuaVoxelManip, initialize),
luamethod(LuaVoxelManip, get_data),
luamethod(LuaVoxelManip, set_data),
luamethod(LuaVoxelManip, get_node_at),

1
src/script/lua_api/l_vmanip.h
View file

@ -24,6 +24,7 @@ private:
static int gc_object(lua_State *L);
static int l_read_from_map(lua_State *L);
static int l_initialize(lua_State *L);
static int l_get_data(lua_State *L);
static int l_set_data(lua_State *L);
static int l_write_to_map(lua_State *L);