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use voxel manip for lv light illumination #292

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Merged
OgelGames merged 3 commits into from
Nov 18, 2022
Merged

use voxel manip for lv light illumination #292

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cd2de06
use voxel manip for lv light illumination
BuckarooBanzay Nov 17, 2022
1829721
shrink code
OgelGames Nov 18, 2022
19ef4ad
oops don't use latest stuff
OgelGames Nov 18, 2022
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33 changes: 23 additions & 10 deletions technic/machines/LV/lamp.lua
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Original file line number Diff line number Diff line change
Expand Up @@ -2,7 +2,6 @@
-- LV Lamp - a powerful light source.
-- Illuminates a 7x7x3(H) volume below itself with light bright as the sun.


local S = technic.getter

local desc = S("@1 Lamp", S("LV"))
Expand All @@ -11,7 +10,6 @@ local unpowered_desc = S("@1 Unpowered", desc)
local off_desc = S("@1 Off", desc)
local demand = 50


-- Invisible light source node used for illumination
minetest.register_node("technic:dummy_light_source", {
description = S("Dummy light source node"),
Expand All @@ -29,16 +27,31 @@ minetest.register_node("technic:dummy_light_source", {
groups = {not_in_creative_inventory = 1}
})

local cid_light = minetest.get_content_id("technic:dummy_light_source")
local cid_air = minetest.CONTENT_AIR

local function illuminate(pos, active)
local pos1 = {x = pos.x - 3, y = pos.y - 1, z = pos.z - 3}
local pos2 = {x = pos.x + 3, y = pos.y - 3, z = pos.z + 3}

local find_node = active and "air" or "technic:dummy_light_source"
local set_node = {name = (active and "technic:dummy_light_source" or "air")}

for _,p in pairs(minetest.find_nodes_in_area(pos1, pos2, find_node)) do
minetest.set_node(p, set_node)
local pos1 = {x = pos.x - 3, y = pos.y - 3, z = pos.z - 3}
local pos2 = {x = pos.x + 3, y = pos.y - 1, z = pos.z + 3}

local vm = minetest.get_voxel_manip()
local emin, emax = vm:read_from_map(pos1, pos2)
local va = VoxelArea:new({MinEdge = emin, MaxEdge = emax})
local node_data = vm:get_data()

local find_node = active and cid_air or cid_light
local set_node = active and cid_light or cid_air

local dirty = false
for i in va:iterp(pos1, pos2) do
if node_data[i] == find_node then
node_data[i] = set_node
dirty = true
end
end
if dirty then
vm:set_data(node_data)
vm:write_to_map()
end
end

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