Adjust things to work in twilight.

- Lenses no longer produce light from sun at all;
  artificial light is always needed.
- Grass and trees survive, don't do dual-time check.
- Breeze sounds work in twilight.
- Sponge drying only requires twilight, now also can
  happen under artificial light.
- Peat to grass happens under twilight.

mods/nc_api/util_misc.lua

@@ -430,6 +430,13 @@ function nodecore.get_depth_light(y, qty)
 	return qty
 end
 
+nodecore.light_sun = 15
+nodecore.light_sky = math_floor(0.5 + nodecore.light_sun * nodecore.get_depth_light(0))
+
+function nodecore.is_full_sun(pos)
+	return minetest.get_node_light(pos) == nodecore.light_sun
+end
+
 function nodecore.get_node_light(pos)
 	local artificial = minetest.get_node_light(pos, 0)
 	local natural = math_floor(0.5 + minetest.get_node_light(pos, 0.5)

mods/nc_envsound/init.lua

@@ -28,14 +28,13 @@ local function check(pos, done, srcs)
 	end
 	if minetest.get_node(sp).name ~= "air" then return end
 
-	local light = nodecore.get_node_light(sp, 0.5)
+	if nodecore.is_full_sun(sp) then
-	if light == 15 then
 		if sp.y <= 0 then return end
 		minetest.sound_play("nc_envsound_air", {
 				pos = sp,
 				gain = nodecore.windiness(sp.y) / 100
 			})
-	elseif light < 4 then
+	elseif nodecore.get_node_light(sp) < 4 then
 		minetest.sound_play("nc_envsound_drip", {
 				pos = sp,
 				pitchvary = 0.4,

mods/nc_optics/lens.lua

@@ -13,17 +13,9 @@ local function lens_check(pos, node, check)
 	end
 
 	local fore = vector.add(pos, face.f)
-	local on
+	local nnode = minetest.get_node(fore)
-	if face.f.y == 1 then
+	local def = minetest.registered_items[nnode.name] or {}
-		local ll = nodecore.get_node_light(fore)
+	if def.light_source and def.light_source > 4 then
-		on = ll and ll >= 14
-	end
-	if not on then
-		local nnode = minetest.get_node(fore)
-		local def = minetest.registered_items[nnode.name] or {}
-		on = def.light_source and def.light_source > 4
-	end
-	if on then
 		return modname .. ":lens_on", {face.k}
 	end
 

mods/nc_player_names/init.lua

@@ -55,7 +55,7 @@ local function canseeface(p1, p2)
 	if dsqr < 1 then return end
 	local ll = nodecore.get_node_light({x = o2.x, y = o2.y + e2, z = o2.z})
 	if not ll then return end
-	local ld = (ll / 15 * distance)
+	local ld = (ll / nodecore.light_max * distance)
 	if dsqr > (ld * ld) then return end
 
 	-- Make sure players' eyes are inside the same fluid.

mods/nc_sponge/abm.lua

@@ -57,7 +57,7 @@ nodecore.register_limited_abm({
 		nodenames = {modname .. ":sponge_wet"},
 		action = function(pos)
 			local above = {x = pos.x, y = pos.y + 1, z = pos.z}
-			if nodecore.get_node_light(above) >= 15 and #findwater(pos) < 1 then
+			if nodecore.is_full_sun(above) and #findwater(pos) < 1 then
 				minetest.sound_play("nc_api_craft_hiss", {gain = 0.02, pos = pos})
 				return minetest.set_node(pos, {name = modname .. ":sponge"})
 			end
@@ -72,8 +72,8 @@ nodecore.register_aism({
 		action = function(stack, data)
 			if data.player and (data.list ~= "main"
 				or data.slot ~= data.player:get_wield_index()) then return end
-			local ll = data.pos and nodecore.get_node_light(data.pos)
+			if data.pos and nodecore.is_full_sun(data.pos)
-			if ll and ll >= 15 and #findwater(data.pos) < 1 then
+			and #findwater(data.pos) < 1 then
 				minetest.sound_play("nc_api_craft_hiss", {gain = 0.02, pos = data.pos})
 				local taken = stack:take_item(1)
 				taken:set_name(modname .. ":sponge")

mods/nc_terrain/abm.lua

@@ -35,10 +35,9 @@ local function grassable(above)
 	or (def.damage_per_second and def.damage_per_second > 0)
 	then return false end
 
-	local ln = nodecore.get_node_light(above) or 0
+	local ln = nodecore.get_node_light(above)
-	if ln >= 10 then return true end
+	if not ln then return end
-	local ld = nodecore.get_node_light(above, 0.5) or 0
+	return ln >= 10
-	if ld >= 10 then return end
 end
 
 local grasscost = 1000

mods/nc_tree/ambiance.lua

@@ -14,7 +14,7 @@ nodecore.register_ambiance({
 			pos.y = pos.y + 1
 			if pos.y <= 0 then return end
 			return minetest.get_node(pos).name == "air"
-			and nodecore.get_node_light(pos, 0.5) == 15
+			and nodecore.is_full_sun(pos)
 			and {gain = nodecore.windiness(pos.y) / 20}
 		end
 	})

mods/nc_tree/api.lua

@@ -49,7 +49,7 @@ end
 function nodecore.tree_growth_rate(pos)
 	local above = {x = pos.x, y = pos.y + 1, z = pos.z}
 	if minetest.get_node(above).name ~= "air" then return end
-	local ll = nodecore.get_node_light(above, 0.5)
+	local ll = nodecore.get_node_light(above)
 	if (not ll) or (ll < 8) then return end
 	for y = 2, 5 do
 		local p ={x = pos.x, y = pos.y + y, z = pos.z}

mods/nc_tree/compost.lua

@@ -69,8 +69,8 @@ nodecore.register_soaking_abm({
 		soakcheck = function(data, pos)
 			if data.total < compostcost then return end
 			minetest.get_meta(pos):from_table({})
-			if math_random(1, 100) == 1 and nodecore.get_node_light(
+			if math_random(1, 100) == 1 and nodecore.is_full_sun(
-				{x = pos.x, y = pos.y + 1, z = pos.z}) == 15 then
+				{x = pos.x, y = pos.y + 1, z = pos.z}) then
 				nodecore.set_loud(pos, {name = "nc_terrain:dirt_with_grass"})
 				return
 			end