From 540508638c400288ed15345b7fa16bdbaf716e6d Mon Sep 17 00:00:00 2001 From: AFCMS Date: Tue, 25 May 2021 01:22:25 +0200 Subject: [PATCH] rewrite flowlib to be more efficient --- mods/CORE/flowlib/init.lua | 144 ++++++++++++++++++------------------- 1 file changed, 71 insertions(+), 73 deletions(-) diff --git a/mods/CORE/flowlib/init.lua b/mods/CORE/flowlib/init.lua index e4e22a20e..ab710e476 100644 --- a/mods/CORE/flowlib/init.lua +++ b/mods/CORE/flowlib/init.lua @@ -1,95 +1,100 @@ +local math = math + +local get_node = minetest.get_node +local get_item_group = minetest.get_item_group + +local registered_nodes = minetest.registered_nodes + flowlib = {} --sum of direction vectors must match an array index + +--(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 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]} + 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 function is_touching(realpos,nodepos,radius) local boarder = 0.5 - radius - return (math.abs(realpos - nodepos) > (boarder)) + 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) +local function is_water(pos) + return get_item_group(get_node(pos).name, "water") ~= 0 end flowlib.is_water = is_water -local node_is_water = function(node) - return (minetest.get_item_group(node.name, "water") ~= 0) +local function node_is_water(node) + return 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) +local function is_lava(pos) + return get_item_group(get_node(pos).name, "lava") ~= 0 end flowlib.is_lava = is_lava -local node_is_lava = function(node) - return (minetest.get_item_group(node.name, "lava") ~= 0) +local function node_is_lava(node) + return 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) +local function is_liquid(pos) + return get_item_group(get_node(pos).name, "liquid") ~= 0 end flowlib.is_liquid = is_liquid -local node_is_liquid = function(node) - return (minetest.get_item_group(node.name, "liquid") ~= 0) +local function node_is_liquid(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 function quick_flow_logic(node, pos_testing, direction) local name = node.name - if not minetest.registered_nodes[name] then + if not registered_nodes[name] then return 0 end - if minetest.registered_nodes[name].liquidtype == "source" then - local node_testing = minetest.get_node(pos_testing) - local param2_testing = node_testing.param2 - if not minetest.registered_nodes[node_testing.name] then + if registered_nodes[name].liquidtype == "source" then + local node_testing = get_node(pos_testing) + if not registered_nodes[node_testing.name] then return 0 end - if minetest.registered_nodes[node_testing.name].liquidtype - ~= "flowing" then + if 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) + elseif registered_nodes[name].liquidtype == "flowing" then + local node_testing = get_node(pos_testing) local param2_testing = node_testing.param2 - if not minetest.registered_nodes[node_testing.name] then + if not registered_nodes[node_testing.name] then return 0 end - if minetest.registered_nodes[node_testing.name].liquidtype - == "source" then + if registered_nodes[node_testing.name].liquidtype == "source" then return -direction - elseif minetest.registered_nodes[node_testing.name].liquidtype - == "flowing" then + elseif registered_nodes[node_testing.name].liquidtype == "flowing" then if param2_testing < node.param2 then if (node.param2 - param2_testing) > 6 then return -direction @@ -108,48 +113,41 @@ local function quick_flow_logic(node,pos_testing,direction) return 0 end -local quick_flow = function(pos,node) - local x = 0 - local z = 0 - +local function quick_flow(pos, node) if not node_is_liquid(node) then - return {x=0,y=0,z=0} + 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}) + local x = quick_flow_logic(node,{x = pos.x-1, y = pos.y, z = pos.z},-1) + quick_flow_logic(node,{x = pos.x+1, y = pos.y, z = pos.z}, 1) + local z = quick_flow_logic(node,{x = pos.x, y = pos.y, z = pos.z-1},-1) + 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 - --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} +local function move_centre(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 = 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 = 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} + if is_touching(realpos.z, pos.z, radius) then + if is_liquid({x = pos.x, y = pos.y, z = pos.z - 1}) then + node = 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 = 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 + return pos, node end flowlib.move_centre = move_centre