add snow covered snow shrub

src/mapgen.lua

@@ -74,17 +74,6 @@ function snow.make_pine(pos,snow,xmas)
 			minetest.add_node(pos, node)
 		end
 	end
-	--Clear ground.
-	for z = -1,1 do
-		for x = -1,1 do
-			local p = {x=pos.x+x,y=pos.y,z=pos.z+z}
-			local nd = minetest.get_node(p).name
-			if nd == "default:snow"
-			or nd == "default:snowblock" then
-				minetest.remove_node(p)
-			end
-		end
-	end
 	if xmas then
 		minetest.remove_node(pos)
 		minetest.spawn_tree(pos, xmas_tree)
@@ -126,18 +115,10 @@ function snow.voxelmanip_pine(pos,a,data)
 		for x = -1,1 do
 			local x = pos.x + x
 
-			--Clear ground.
-			local node = a:index(x,pos.y,z)
-			if data[node] == c_snow then
-				data[node] = c_air
-			end
-
 			--Make tree.
 			for i = 1,2 do
-				local node = a:index(x,pos.y+i,z)
-				data[node] = c_pine_needles
-				if snow
-				and x ~= 0
+				data[a:index(x,pos.y+i,z)] = c_pine_needles
+				if x ~= 0
 				and z ~= 0
 				and perlin1:get2d({x=x,y=z}) > 0.53 then
 					local abovenode = a:index(x,pos.y+i+1,z)
@@ -154,7 +135,6 @@ function snow.voxelmanip_pine(pos,a,data)
 		data[a:index(x-1,y,z)] = c_pine_needles
 		data[a:index(x,y,z+1)] = c_pine_needles
 		data[a:index(x,y,z-1)] = c_pine_needles
-		if snow then
 		if perlin1:get2d({x=x+1,y=z}) > 0.53 then
 			data[a:index(x+1,y+1,z)] = c_snow
 		end
@@ -168,14 +148,12 @@ function snow.voxelmanip_pine(pos,a,data)
 			data[a:index(x,y+1,z-1)] = c_snow
 		end
 	end
-	end
 	for i=0, 4 do
 		data[a:index(pos.x,pos.y+i,pos.z)] = c_pinetree
 	end
 	data[a:index(pos.x,pos.y+5,pos.z)] = c_pine_needles
 	data[a:index(pos.x,pos.y+6,pos.z)] = c_pine_needles
-	if snow
-	and perlin1:get2d({x=pos.x,y=pos.z}) > 0.53 then
+	if perlin1:get2d({x=pos.x,y=pos.z}) > 0.53 then
 		data[a:index(pos.x,pos.y+7,pos.z)] = c_snow
 	end
 end

src/mapgen_v6.lua

@@ -92,7 +92,7 @@ local function define_contents()
 		ignore = minetest.get_content_id("ignore"),
 		stone = minetest.get_content_id("default:stone"),
 		dry_shrub = minetest.get_content_id("default:dry_shrub"),
-		snow_shrub = minetest.get_content_id("snow:shrub"),
+		snow_shrub = minetest.get_content_id("snow:shrub_covered"),
 		leaves = minetest.get_content_id("default:leaves"),
 		jungleleaves = minetest.get_content_id("default:jungleleaves"),
 		junglegrass = minetest.get_content_id("default:junglegrass"),
@@ -122,6 +122,7 @@ minetest.register_on_generated(function(minp, maxp, seed)
 	local vm, emin, emax = minetest.get_mapgen_object("voxelmanip")
 	local area = VoxelArea:new({MinEdge=emin, MaxEdge=emax})
 	local data = vm:get_data()
+	local param2s = vm:get_param2_data()
 
 	local snow_tab,num = {},1
 
@@ -343,6 +344,7 @@ minetest.register_on_generated(function(minp, maxp, seed)
 						-- replace other plants with shrubs
 						data[vi] = c.dirt_with_snow
 						data[node] = known_plants[c_ground] or c.snow_shrub
+						param2s[node] = pr:next(0,179)
 					end
 				end
 			end
@@ -351,7 +353,6 @@ minetest.register_on_generated(function(minp, maxp, seed)
 	end
 	end
 
-	local param2s
 	if num ~= 1 then
 		for _,i in pairs(snow_tab) do
 			-- set snow
@@ -394,9 +395,6 @@ minetest.register_on_generated(function(minp, maxp, seed)
 								data[vi] = c.snow_block
 							else
 								-- set a specific snow height
-								if not param2s then
-									param2s = vm:get_param2_data()
-								end
 								param2s[vi] = h*7
 							end
 						end
@@ -407,9 +405,7 @@ minetest.register_on_generated(function(minp, maxp, seed)
 	end
 
 	vm:set_data(data)
-	if param2s then
 	vm:set_param2_data(param2s)
-	end
 	vm:set_lighting({day=0, night=0})
 	vm:calc_lighting()
 	vm:write_to_map()

src/nodes.lua

@@ -159,8 +159,8 @@ minetest.register_node("snow:moss", {
 	groups = {crumbly=3, attached_node=1},
 })
 
--- Shrub
-minetest.register_node("snow:shrub", {
+-- Shrub(s)
+nodedef = {
 	description = "Snow Shrub",
 	tiles = {"snow_shrub.png"},
 	inventory_image = "snow_shrub.png",
@@ -178,7 +178,14 @@ minetest.register_node("snow:shrub", {
 		type = "fixed",
 		fixed = {-0.3, -0.5, -0.3, 0.3, -5/16, 0.3},
 	},
-})
+}
+minetest.register_node("snow:shrub", table.copy(nodedef))
+
+nodedef.tiles = {"snow_shrub.png^snow_shrub_covering.png"}
+nodedef.inventory_image = "snow_shrub.png^snow_shrub_covering.png"
+nodedef.wield_image = "snow_shrub.png^snow_shrub_covering.png"
+nodedef.drop = "snow:shrub"
+minetest.register_node("snow:shrub_covered", nodedef)