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lightning
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Tweak some stuff, now it's somewhat behaving.

This commit is contained in:
Auke Kok 2016-01-13 20:43:28 -08:00
parent 0ea81f5b0a
commit 6eb4914dd1
1 changed files with 29 additions and 18 deletions
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47
init.lua
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@ -14,7 +14,8 @@ local lightning = {}
lightning.interval_low = 17
lightning.interval_high = 503
lightning.range = 200
lightning.range_h = 100
lightning.range_v = 50
lightning.size = 100
local rng = PcgRandom(32321123312123)
@ -39,25 +40,27 @@ lightning.strike = function()
return
end
pos.x = math.floor(pos.x - (lightning.range / 2) + rng:next(1, lightning.range))
pos.y = pos.y + (lightning.range / 2)
pos.z = math.floor(pos.z - (lightning.range / 2) + rng:next(1, lightning.range))
pos.x = math.floor(pos.x - (lightning.range_h / 2) + rng:next(1, lightning.range_h))
pos.y = pos.y + (lightning.range_v / 2)
pos.z = math.floor(pos.z - (lightning.range_h / 2) + rng:next(1, lightning.range_h))
local b, pos2 = minetest.line_of_sight(pos, {x = pos.x, y = pos.y - lightning.range, z = pos.z}, 1)
local b, pos2 = minetest.line_of_sight(pos, {x = pos.x, y = pos.y - lightning.range_v, z = pos.z}, 1)
-- nothing but air found
if b then
return
end
local n = minetest.get_node({x = pos2.x, y = pos2.y - 1/2, z = pos2.z})
if n.name == "air" or n.name == "ignore" then
return
end
minetest.add_particlespawner({
amount = 1,
time = 0.2,
-- make it hit the top of a block exactly with the bottom
minpos = { x = pos2.x, y = pos2.y + (lightning.size / 2) + 1/2, z = pos2.z },
maxpos = { x = pos2.x, y = pos2.y + (lightning.size / 2) + 1/2, z = pos2.z },
-- the particle will be centered above the pos2 position but we
-- want it to hit the node on the ground
-- down really fast at the ground
minpos = {x = pos2.x, y = pos2.y + (lightning.size / 2) + 1/2, z = pos2.z },
maxpos = {x = pos2.x, y = pos2.y + (lightning.size / 2) + 1/2, z = pos2.z },
minvel = {x = 0, y = 0, z = 0},
maxvel = {x = 0, y = 0, z = 0},
minacc = {x = 0, y = 0, z = 0},
@ -78,21 +81,29 @@ lightning.strike = function()
-- set the air node above it on fire
pos2.y = pos2.y + 1/2
if minetest.get_node(pos2).name == "air" then
minetest.set_node(pos2, {name = "fire:basic_flame"})
if minetest.get_item_group(minetest.get_node({x = pos2.x, y = pos2.y - 1, z = pos2.z}).name, "liquid") < 1 then
if minetest.get_node(pos2).name == "air" then
-- only 1/4 of the time, something is changed
if rng:next(1,4) > 1 then
return
end
-- very rarely, cause a massive forest fire (100*4*250 = 1/100000 seconds)
if rng:next(1,100) == 1 then
minetest.set_node(pos2, {name = "fire:basic_flame"})
else
minetest.set_node(pos2, {name = "fire:permanent_flame"})
end
end
end
-- perform block modifications
pos2.y = pos2.y - 1
local n = minetest.get_node(pos2)
if n.name == "default:tree" or n.name == "default:jungletree" or n.name == "default:pine_tree" or
n.name == "default:acacia_tree" or n.name == "default:acacia_tree" then
if minetest.get_item_group(n.name, "tree") > 0 then
minetest.set_node(pos2, { name = "default:coalblock"})
elseif n.name == "default:sand" or n.name == "default:desert_sand" then
elseif minetest.get_item_group(n.name, "sand") > 0 then
minetest.set_node(pos2, { name = "default:glass"})
elseif string.find(n.name, "default:dirt") then
minetest.set_node(pos2, { name = "default:gravel"})
elseif string.find(n.name, "default:soil") then
elseif minetest.get_item_group(n.name, "soil") > 0 then
minetest.set_node(pos2, { name = "default:gravel"})
end
end