mirror of
https://git.minetest.land/Mineclonia/Mineclonia.git
synced 2024-11-25 00:45:10 +00:00
146 lines
4 KiB
Lua
146 lines
4 KiB
Lua
flowlib = {}
|
|
|
|
--sum of direction vectors must match an array index
|
|
local function to_unit_vector(dir_vector)
|
|
--(sum,root)
|
|
-- (0,1), (1,1+0=1), (2,1+1=2), (3,1+2^2=5), (4,2^2+2^2=8)
|
|
local inv_roots = {[0] = 1, [1] = 1, [2] = 0.70710678118655, [4] = 0.5
|
|
, [5] = 0.44721359549996, [8] = 0.35355339059327}
|
|
local sum = dir_vector.x*dir_vector.x + dir_vector.z*dir_vector.z
|
|
return {x=dir_vector.x*inv_roots[sum],y=dir_vector.y
|
|
,z=dir_vector.z*inv_roots[sum]}
|
|
end
|
|
|
|
local is_touching = function(realpos,nodepos,radius)
|
|
local boarder = 0.5 - radius
|
|
return (math.abs(realpos - nodepos) > (boarder))
|
|
end
|
|
|
|
flowlib.is_touching = is_touching
|
|
|
|
local is_water = function(pos)
|
|
return (minetest.get_item_group(minetest.get_node(
|
|
{x=pos.x,y=pos.y,z=pos.z}).name
|
|
, "water") ~= 0)
|
|
end
|
|
|
|
flowlib.is_water = is_water
|
|
|
|
local node_is_water = function(node)
|
|
return (minetest.get_item_group(node.name, "water") ~= 0)
|
|
end
|
|
|
|
flowlib.node_is_water = node_is_water
|
|
|
|
local is_lava = function(pos)
|
|
return (minetest.get_item_group(minetest.get_node(
|
|
{x=pos.x,y=pos.y,z=pos.z}).name
|
|
, "lava") ~= 0)
|
|
end
|
|
|
|
flowlib.is_lava = is_lava
|
|
|
|
local node_is_lava = function(node)
|
|
return (minetest.get_item_group(node.name, "lava") ~= 0)
|
|
end
|
|
|
|
flowlib.node_is_lava = node_is_lava
|
|
|
|
|
|
local is_liquid = function(pos)
|
|
return (minetest.get_item_group(minetest.get_node(
|
|
{x=pos.x,y=pos.y,z=pos.z}).name
|
|
, "liquid") ~= 0)
|
|
end
|
|
|
|
flowlib.is_liquid = is_liquid
|
|
|
|
local node_is_liquid = function(node)
|
|
return (minetest.get_item_group(node.name, "liquid") ~= 0)
|
|
end
|
|
|
|
flowlib.node_is_liquid = node_is_liquid
|
|
|
|
--This code is more efficient
|
|
local function quick_flow_logic(node,pos_testing,direction)
|
|
local name = node.name
|
|
if minetest.registered_nodes[name].liquidtype == "source" then
|
|
local node_testing = minetest.get_node(pos_testing)
|
|
local param2_testing = node_testing.param2
|
|
if minetest.registered_nodes[node_testing.name].liquidtype
|
|
~= "flowing" then
|
|
return 0
|
|
else
|
|
return direction
|
|
end
|
|
elseif minetest.registered_nodes[name].liquidtype == "flowing" then
|
|
local node_testing = minetest.get_node(pos_testing)
|
|
local param2_testing = node_testing.param2
|
|
if minetest.registered_nodes[node_testing.name].liquidtype
|
|
== "source" then
|
|
return -direction
|
|
elseif minetest.registered_nodes[node_testing.name].liquidtype
|
|
== "flowing" then
|
|
if param2_testing < node.param2 then
|
|
if (node.param2 - param2_testing) > 6 then
|
|
return -direction
|
|
else
|
|
return direction
|
|
end
|
|
elseif param2_testing > node.param2 then
|
|
if (param2_testing - node.param2) > 6 then
|
|
return direction
|
|
else
|
|
return -direction
|
|
end
|
|
end
|
|
end
|
|
end
|
|
return 0
|
|
end
|
|
|
|
local quick_flow = function(pos,node)
|
|
local x = 0
|
|
local z = 0
|
|
|
|
if not node_is_liquid(node) then
|
|
return {x=0,y=0,z=0}
|
|
end
|
|
|
|
x = x + quick_flow_logic(node,{x=pos.x-1,y=pos.y,z=pos.z},-1)
|
|
x = x + quick_flow_logic(node,{x=pos.x+1,y=pos.y,z=pos.z}, 1)
|
|
z = z + quick_flow_logic(node,{x=pos.x,y=pos.y,z=pos.z-1},-1)
|
|
z = z + quick_flow_logic(node,{x=pos.x,y=pos.y,z=pos.z+1}, 1)
|
|
|
|
return to_unit_vector({x=x,y=0,z=z})
|
|
end
|
|
|
|
flowlib.quick_flow = quick_flow
|
|
|
|
|
|
--if not in water but touching, move centre to touching block
|
|
--x has higher precedence than z
|
|
--if pos changes with x, it affects z
|
|
local move_centre = function(pos,realpos,node,radius)
|
|
if is_touching(realpos.x,pos.x,radius) then
|
|
if is_liquid({x=pos.x-1,y=pos.y,z=pos.z}) then
|
|
node = minetest.get_node({x=pos.x-1,y=pos.y,z=pos.z})
|
|
pos = {x=pos.x-1,y=pos.y,z=pos.z}
|
|
elseif is_liquid({x=pos.x+1,y=pos.y,z=pos.z}) then
|
|
node = minetest.get_node({x=pos.x+1,y=pos.y,z=pos.z})
|
|
pos = {x=pos.x+1,y=pos.y,z=pos.z}
|
|
end
|
|
end
|
|
if is_touching(realpos.z,pos.z,radius) then
|
|
if is_liquid({x=pos.x,y=pos.y,z=pos.z-1}) then
|
|
node = minetest.get_node({x=pos.x,y=pos.y,z=pos.z-1})
|
|
pos = {x=pos.x,y=pos.y,z=pos.z-1}
|
|
elseif is_liquid({x=pos.x,y=pos.y,z=pos.z+1}) then
|
|
node = minetest.get_node({x=pos.x,y=pos.y,z=pos.z+1})
|
|
pos = {x=pos.x,y=pos.y,z=pos.z+1}
|
|
end
|
|
end
|
|
return pos,node
|
|
end
|
|
|
|
flowlib.move_centre = move_centre
|