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-- Solar panels are the building blocks of LV solar arrays
-- They can however also be used separately but with reduced efficiency due to the missing transformer.
-- Individual panels are 20% less efficient than when the panels are combined into full arrays.
minetest.register_node("technic:solar_panel", {
tiles = {"technic_solar_panel_top.png", "technic_solar_panel_bottom.png", "technic_solar_panel_side.png",
"technic_solar_panel_side.png", "technic_solar_panel_side.png", "technic_solar_panel_side.png"},
groups = {snappy=2,choppy=2,oddly_breakable_by_hand=2},
sounds = default.node_sound_wood_defaults(),
description="Solar Panel",
active = false,
technic_power_machine=1,
internal_EU_buffer=0;
internal_EU_buffer_size=160;
drawtype = "nodebox",
paramtype = "light",
is_ground_content = true,
node_box = {
type = "fixed",
fixed = {-0.5, -0.5, -0.5, 0.5, 0, 0.5},
},
selection_box = {
type = "fixed",
fixed = {-0.5, -0.5, -0.5, 0.5, 0, 0.5},
},
on_construct = function(pos)
local meta = minetest.env:get_meta(pos)
meta:set_float("technic_power_machine", 1)
meta:set_float("internal_EU_buffer", 0)
meta:set_float("internal_EU_buffer_size", 160)
meta:set_string("infotext", "Solar Panel")
meta:set_float("active", false)
end,
})
minetest.register_craft({
output = 'technic:solar_panel 1',
recipe = {
{'technic:doped_silicon_wafer', 'technic:doped_silicon_wafer','technic:doped_silicon_wafer'},
{'technic:doped_silicon_wafer', 'technic:lv_cable', 'technic:doped_silicon_wafer'},
{'technic:doped_silicon_wafer', 'technic:doped_silicon_wafer','technic:doped_silicon_wafer'},
}
})
minetest.register_abm(
{nodenames = {"technic:solar_panel"},
interval = 1,
chance = 1,
action = function(pos, node, active_object_count, active_object_count_wider)
-- The action here is to make the solar panel prodice power
-- Power is dependent on the light level and the height above ground
-- 130m and above is optimal as it would be above cloud level.
-- Height gives 1/4 of the effect, light 3/4. Max. effect is 26EU.
-- There are many ways to cheat by using other light sources like lamps.
-- As there is no way to determine if light is sunlight that is just a shame.
-- To take care of some of it solar panels do not work outside daylight hours or if
-- built below -10m
local pos1={}
pos1.y=pos.y+1
pos1.x=pos.x
pos1.z=pos.z
local light = minetest.env:get_node_light(pos1, nil)
local time_of_day = minetest.env:get_timeofday()
local meta = minetest.env:get_meta(pos)
if light == nil then light = 0 end
-- turn on panel only during day time and if sufficient light
-- I know this is counter intuitive when cheating by using other light sources underground.
if light >= 12 and time_of_day>=0.24 and time_of_day<=0.76 and pos.y > -10 then
local internal_EU_buffer=meta:get_float("internal_EU_buffer")
local internal_EU_buffer_size=meta:get_float("internal_EU_buffer_size")
local charge_to_give=math.floor(light*(light*0.0867+pos1.y/130*0.4333))
if charge_to_give<0 then charge_to_give=0 end
if charge_to_give>26 then charge_to_give=26 end
if internal_EU_buffer+charge_to_give>internal_EU_buffer_size then
charge_to_give=internal_EU_buffer_size-internal_EU_buffer
end
meta:set_string("infotext", "Solar Panel is active ("..charge_to_give.."EU)")
meta:set_float("active",1)
internal_EU_buffer=internal_EU_buffer+charge_to_give
meta:set_float("internal_EU_buffer",internal_EU_buffer)
else
meta:set_string("infotext", "Solar Panel is inactive");
meta:set_float("active",0)
end
end,
})
register_LV_machine ("technic:solar_panel","PR")
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