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Added a couple features to the API to allow for turning off checking for air,

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deleting nodes surrounding the spawn target during the mapgen code, replacing
the spawn target, and checking the type of node directly below the spawn
target.
This commit is contained in:
Vanessa Ezekowitz 2013-02-23 12:33:46 -05:00
parent 96df170e2d
commit 199fa00b0b
2 changed files with 51 additions and 4 deletions
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25
API.txt
View File

@ -250,13 +250,18 @@ here than are available in the ABM-based spawner, as some stuff doesn't make
sense at map-generation time.
biome = {
surface = "string", -- What node to spawn on. Must specify one
-- node, such as "default:dirt_with_grass".
surface = something, -- What node(s). May be a string such as
-- "default:dirt_with_grass" or a table with
-- multiple such entries.
---- Everything else is optional, but you'll definitely want to use
---- some of these other fields to limit where and under what
---- conditions the objects are spawned.
below_nodes = {table}, -- List of nodes that must be below the target
-- node. Useful in snow biomes to keep
-- objects from spawning in snow that's on the
-- wrong surface for that object.
avoid_nodes = {table}, -- List of nodes or groups to avoid when
-- spawning.
avoid_radius = num, -- how much distance to leave between the
@ -311,6 +316,22 @@ biome = {
-- plant (lowest Perlin temperature value).
verticals_list = {table}, -- Same as with the spawn_on_surfaces
-- function.
check_air = bool, -- Flag to tell the mapgen code to check for
-- air above the spawn target. Defaults to
-- true if not explicitly set to false.
delete_above = bool, -- Flag to tell the mapgen code to delete the
-- two nodes directly above the spawn target
-- just before adding the plant or tree.
-- Useful when generating in snow biomes.
-- Defaults to false.
delete_above_surround = bool, -- Flag to tell the mapgen code to also
-- delete the four nodes surrounding the above
-- space, and the four nodes above those,
-- resulting in a two-node-deep cross-shaped
-- empty region above the spawn target.
-- Useful when adding trees to snow biomes.
-- Defaults to false.
spawn_replace_node = bool -- same as with the ABM spawner.
}
Regarding node_or_function_or_treedef, this must either be table with an

30
plants_lib/init.lua
View File

@ -81,6 +81,7 @@ function plantslib:search_for_surfaces(minp, maxp, biomedef, node_or_function_or
if not biome.near_nodes_vertical then biome.near_nodes_vertical = 1 end
if not biome.humidity_min then biome.humidity_min = 1 end
if not biome.humidity_max then biome.humidity_max = -1 end
if biome.check_air ~= false then biome.check_air = true end
plantslib:dbg("Started checking generated mapblock volume...")
local searchnodes = minetest.env:find_nodes_in_area(minp, maxp, biome.surface)
@ -94,7 +95,7 @@ function plantslib:search_for_surfaces(minp, maxp, biomedef, node_or_function_or
local noise2 = plantslib.perlin_temperature:get2d({x=p_top.x, y=p_top.z})
local noise3 = plantslib.perlin_humidity:get2d({x=p_top.x+150, y=p_top.z+50})
if (not biome.depth or minetest.env:get_node({ x = pos.x, y = pos.y-biome.depth-1, z = pos.z }).name ~= biome.surface)
and minetest.env:get_node(p_top).name == "air"
and (not biome.check_air or (biome.check_air and minetest.env:get_node(p_top).name == "air"))
and pos.y >= biome.min_elevation
and pos.y <= biome.max_elevation
and noise1 > biome.plantlife_limit
@ -105,13 +106,14 @@ function plantslib:search_for_surfaces(minp, maxp, biomedef, node_or_function_or
and (not biome.ncount or table.getn(minetest.env:find_nodes_in_area({x=pos.x-1, y=pos.y, z=pos.z-1}, {x=pos.x+1, y=pos.y, z=pos.z+1}, biome.neighbors)) > biome.ncount)
and (not biome.near_nodes or table.getn(minetest.env:find_nodes_in_area({x=pos.x-biome.near_nodes_size, y=pos.y-biome.near_nodes_vertical, z=pos.z-biome.near_nodes_size}, {x=pos.x+biome.near_nodes_size, y=pos.y+biome.near_nodes_vertical, z=pos.z+biome.near_nodes_size}, biome.near_nodes)) >= biome.near_nodes_count)
and math.random(1,100) > biome.rarity
and (not biome.below_nodes or string.find(dump(biome.below_nodes), minetest.env:get_node({x=pos.x, y=pos.y-1, z=pos.z}).name) )
then
table.insert(in_biome_nodes, pos)
num_in_biome_nodes = num_in_biome_nodes + 1
end
end
plantslib:dbg("Found "..num_in_biome_nodes.." surface nodes of type "..biome.surface.." in 5x5x5 mapblock volume at {"..dump(minp)..":"..dump(maxp).."} to check.")
plantslib:dbg("Found "..num_in_biome_nodes.." surface nodes of type(s) "..dump(biome.surface).." in 5x5x5 mapblock volume at {"..dump(minp)..":"..dump(maxp).."} to check.")
if num_in_biome_nodes > 0 then
plantslib:dbg("Calculated maximum of "..math.min(biome.max_count*3, num_in_biome_nodes).." nodes to be checked in that list.")
@ -120,9 +122,33 @@ function plantslib:search_for_surfaces(minp, maxp, biomedef, node_or_function_or
local spawned = false
while tries < 2 and not spawned do
local pos = in_biome_nodes[math.random(1, num_in_biome_nodes)]
if biome.spawn_replace_node then
pos.y = pos.y-1
end
local p_top = { x = pos.x, y = pos.y + 1, z = pos.z }
if not(biome.avoid_radius and biome.avoid_nodes) or not minetest.env:find_node_near(p_top, biome.avoid_radius + math.random(-1.5,1.5), biome.avoid_nodes) then
spawned = true
if biome.delete_above then
minetest.env:remove_node(p_top)
minetest.env:remove_node({x=p_top.x, y=p_top.y+1, z=p_top.z})
end
if biome.delete_above_surround then
minetest.env:remove_node({x=p_top.x-1, y=p_top.y, z=p_top.z})
minetest.env:remove_node({x=p_top.x+1, y=p_top.y, z=p_top.z})
minetest.env:remove_node({x=p_top.x, y=p_top.y, z=p_top.z-1})
minetest.env:remove_node({x=p_top.x, y=p_top.y, z=p_top.z+1})
minetest.env:remove_node({x=p_top.x-1, y=p_top.y+1, z=p_top.z})
minetest.env:remove_node({x=p_top.x+1, y=p_top.y+1, z=p_top.z})
minetest.env:remove_node({x=p_top.x, y=p_top.y+1, z=p_top.z-1})
minetest.env:remove_node({x=p_top.x, y=p_top.y+1, z=p_top.z+1})
end
if biome.spawn_replace_node then
minetest.env:remove_node(pos)
end
if type(node_or_function_or_model) == "table" then
plantslib:dbg("Spawn tree at {"..dump(pos).."}")
plantslib:generate_tree(pos, node_or_function_or_model)