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