Add snow and ice blocks

Slush, soft snow, snow, packing snow, white ice, pure ice

init.lua

@@ -438,6 +438,65 @@ pedology.register_sucky_group("gravel_medium", "medium gravel", "medium stone",
 pedology.register_sucky_group("gravel_coarse", "coarse gravel", "big stone",
 	2, 0, 1, 1, {500, 750, 1000}, 1, sound_gravel_coarse, { crumbly = 1, sun_dry = 1 })
 
+--[[ snow and ice ]]
+
+-- TODO: slushy snow is very instable snow; it should be destroyed when touched
+minetest.register_node("pedology:snow_slush", {
+	description = "slushy snow",
+	tiles = { "pedology_snow_slush.png" },
+	sounds = { footstep = { name = "pedology_snow_soft_footstep", gain = 1 } },
+	is_groupd_content = true,
+	groups = { crumbly = 1, level = 1, melts = 1, falling_node = 1},
+	freezemelt = "pedology:water_fresh_source",
+})
+
+minetest.register_node("pedology:snow_soft", {
+	description = "soft snow",
+	tiles = { "pedology_snow_soft.png" },
+	sounds = { footstep = { name = "pedology_snow_soft_footstep", gain = 1 } },
+	is_groupd_content = true,
+	groups = { crumbly = 2, level = 2, melts = 1, falling_node = 1 },
+	freezemelt = "pedology:water_fresh_source",
+})
+
+minetest.register_node("pedology:snow", {
+	description = "snow",
+	tiles = { "pedology_snow.png" },
+	sounds = { footstep = { name = "pedology_snow_footstep", gain = 1 } },
+	is_groupd_content = true,
+	groups = { crumbly = 3, level = 3, melts = 1, attached_node = 1, falling_node = 1 },
+	freezemelt = "pedology:water_fresh_source",
+})
+
+minetest.register_node("pedology:snow_packing", {
+	description = "packing snow",
+	tiles = { "pedology_snow_packing.png" },
+	sounds = { footstep = { name = "pedology_ice_white_footstep", gain = 0.8 } },
+	is_groupd_content = true,
+	groups = { crumbly = 3, cracky = 1, level = 4, melts = 1 },
+	freezemelt = "pedology:water_fresh_source",
+})
+
+minetest.register_node("pedology:ice_white", {
+	description = "white ice",
+	tiles = { "pedology_ice_white.png" },
+	sounds = { footstep = { name = "pedology_ice_white_footstep", gain = 0.8 } },
+	is_groupd_content = true,
+	groups = { cracky = 3, level = 1, melts = 1 },
+	freezemelt = "pedology:water_fresh_source",
+})
+
+minetest.register_node("pedology:ice_pure", {
+	description = "pure ice",
+	drawtype = "glasslike",
+	paramtype = "light",
+	tiles = { "pedology_ice_pure.png" },
+	inventory_image = minetest.inventorycube( "pedology_ice_pure.png" ),
+	sounds = { footstep = { name = "pedology_ice_pure_footstep", gain = 0.8 } },
+	is_groupd_content = true,
+	groups = { cracky = 3, level = 2, melts = 1 },
+	freezemelt = "pedology:water_fresh_source",
+})
 
 --[[ TODO: clay mud
 pedology.register_liquid("clay_3", "sludgy clay", 192, 6, 5, 0, {a=192, r=104, g=23, b=0}, {oozing=1})