minetest/builtin/emerge/env.lua

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2024-02-13 22:47:30 +01:00
-- Reimplementations of some environment function on vmanips, since this is
-- what the emerge environment operates on
-- core.vmanip = <VoxelManip> -- set by C++
function core.set_node(pos, node)
return core.vmanip:set_node_at(pos, node)
end
function core.bulk_set_node(pos_list, node)
local vm = core.vmanip
local set_node_at = vm.set_node_at
for _, pos in ipairs(pos_list) do
if not set_node_at(vm, pos, node) then
return false
end
end
return true
end
core.add_node = core.set_node
-- we don't deal with metadata currently
core.swap_node = core.set_node
function core.remove_node(pos)
return core.vmanip:set_node_at(pos, {name="air"})
end
function core.get_node(pos)
return core.vmanip:get_node_at(pos)
end
function core.get_node_or_nil(pos)
local node = core.vmanip:get_node_at(pos)
return node.name ~= "ignore" and node
end
function core.get_perlin(seed, octaves, persist, spread)
local params
if type(seed) == "table" then
params = table.copy(seed)
else
assert(type(seed) == "number")
params = {
seed = seed,
octaves = octaves,
persist = persist,
spread = {x=spread, y=spread, z=spread},
}
end
params.seed = core.get_seed(params.seed) -- add mapgen seed
return PerlinNoise(params)
end
function core.get_perlin_map(params, size)
local params2 = table.copy(params)
params2.seed = core.get_seed(params.seed) -- add mapgen seed
return PerlinNoiseMap(params2, size)
end