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change surface tunnel detection to allow above-ground stalactites and stalagmites

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This commit is contained in:
FaceDeer 2020-01-27 23:40:39 -07:00
parent 861b8935a9
commit d9236c33a3
1 changed files with 41 additions and 17 deletions
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58
df_caverns/surface_tunnels.lua
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@ -1,8 +1,11 @@
-- surface tunnels
local y_max = -10
local y_max = 200
local y_min = df_caverns.config.ymax
local c_stone = minetest.get_content_id("default:stone")
local c_air = minetest.get_content_id("air")
minetest.register_on_generated(function(minp, maxp, seed)
--if out of range of cave definition limits, abort
if minp.y > y_max or maxp.y < y_min then
@ -12,36 +15,57 @@ minetest.register_on_generated(function(minp, maxp, seed)
local t_start = os.clock()
local vm, data, data_param2, area = mapgen_helper.mapgen_vm_data_param2()
local eminp = {x=minp.x, y=area.MinEdge.y, z=minp.z}
local emaxp = {x=maxp.x, y=area.MaxEdge.y, z=maxp.z}
local minp_y = minp.y
local maxp_y = maxp.y
local humiditymap = minetest.get_mapgen_object("humiditymap")
local nvals_cracks = mapgen_helper.perlin2d("df_cavern:cracks", minp, maxp, df_caverns.np_cracks)
local previous_state = "outside_region"
local previous_y = minp.y
local previous_y = eminp.y-1
for vi, x, y, z in area:iterp_yxz(minp, maxp) do
local previous_potential_floor_vi
local previous_potential_floor_y
local previous_node
for vi, x, y, z in area:iterp_yxz(eminp, emaxp) do
if y < previous_y then
previous_state = "outside_region"
-- we've started a new column, initialize everything
previous_potential_floor_vi = nil
previous_potential_floor_y = nil
previous_node = nil
end
previous_y = y
if y < y_max then
if mapgen_helper.buildable_to(data[vi]) then
if previous_state == "in_rock" and not mapgen_helper.buildable_to(data[vi-area.ystride]) then
local index2d = mapgen_helper.index2d(minp, maxp, x, z)
local humidity = humiditymap[index2d]
df_caverns.tunnel_floor(minp, maxp, area, vi-area.ystride, nvals_cracks, data, data_param2, humidity > 30)
local current_node = data[vi]
if previous_node and y < y_max then
if current_node == c_air and previous_node == c_stone then
-- this may be a floor, but only if we eventually hit a ceiling in this column
previous_potential_floor_vi = vi-area.ystride
previous_potential_floor_y = y-1
elseif current_node == c_stone and previous_node == c_air and previous_potential_floor_vi then
-- we hit a ceiling after passing through a floor
local index2d = mapgen_helper.index2d(minp, maxp, x, z)
local humidity = humiditymap[index2d]
if previous_potential_floor_y <= maxp_y and previous_potential_floor_y >= minp_y then
df_caverns.tunnel_floor(minp, maxp, area, previous_potential_floor_vi, nvals_cracks, data, data_param2, humidity > 30)
end
previous_state = "in_tunnel"
else
if previous_state == "in_tunnel" and not mapgen_helper.buildable_to(data[vi]) then
local index2d = mapgen_helper.index2d(minp, maxp, x, z)
local humidity = humiditymap[index2d]
if y <= maxp_y and y >= minp_y then
df_caverns.tunnel_ceiling(minp, maxp, area, vi, nvals_cracks, data, data_param2, humidity > 30)
end
previous_state = "in_rock"
previous_potential_floor_vi = nil
previous_potential_floor_in_range = nil
elseif not mapgen_helper.buildable_to(current_node) then
-- we've entered a non-stone ceiling of some kind. Abort potential floor-ceiling pair detection.
previous_potential_floor_vi = nil
previous_potential_floor_in_range = nil
end
end
previous_node = current_node
end
--send data back to voxelmanip