Digging time groups WIP

21 files changed, 695 insertions, 704 deletions

diff --git a/data/builtin.lua b/data/builtin.lua
index eba5b429e..258704f63 100644
--- a/data/builtin.lua
+++ b/data/builtin.lua
@@ -327,9 +327,8 @@ function minetest.node_dig(pos, node, digger)
 		local drops = minetest.get_node_drops(node.name, wielded:get_name())
 
 		-- Wear out tool
-		mp = def.material
-		tp = wielded:get_tool_digging_properties()
-		dp = minetest.get_digging_properties(mp, tp)
+		tp = wielded:get_tool_capabilities()
+		dp = minetest.get_dig_params(def.groups, tp)
 		wielded:add_wear(dp.wear)
 		digger:set_wielded_item(wielded)
 
@@ -366,7 +365,7 @@ minetest.nodedef_default = {
 	stack_max = 99,
 	usable = false,
 	liquids_pointable = false,
-	tool_digging_properties = nil,
+	tool_capabilities = nil,
 
 	-- Interaction callbacks
 	on_place = minetest.item_place,
@@ -425,7 +424,7 @@ minetest.craftitemdef_default = {
 	wield_scale = {x=1,y=1,z=1},
 	stack_max = 99,
 	liquids_pointable = false,
-	tool_digging_properties = nil,
+	tool_capabilities = nil,
 
 	-- Interaction callbacks
 	on_place = minetest.item_place,
@@ -443,7 +442,7 @@ minetest.tooldef_default = {
 	wield_scale = {x=1,y=1,z=1},
 	stack_max = 1,
 	liquids_pointable = false,
-	tool_digging_properties = nil,
+	tool_capabilities = nil,
 
 	-- Interaction callbacks
 	on_place = minetest.item_place,
@@ -461,7 +460,7 @@ minetest.noneitemdef_default = {  -- This is used for the hand and unknown items
 	wield_scale = {x=1,y=1,z=1},
 	stack_max = 99,
 	liquids_pointable = false,
-	tool_digging_properties = nil,
+	tool_capabilities = nil,
 
 	-- Interaction callbacks
 	on_place = nil,
@@ -643,7 +642,7 @@ function minetest.register_tool(name, tooldef)
 	if tooldef.inventory_image == nil and tooldef.image ~= nil then
 		tooldef.inventory_image = tooldef.image
 	end
-	if tooldef.tool_digging_properties == nil and
+	if tooldef.tool_capabilities == nil and
 	   (tooldef.full_punch_interval ~= nil or
 	    tooldef.basetime ~= nil or
 	    tooldef.dt_weight ~= nil or
@@ -655,7 +654,7 @@ function minetest.register_tool(name, tooldef)
 	    tooldef.dd_crackiness ~= nil or
 	    tooldef.dd_crumbliness ~= nil or
 	    tooldef.dd_cuttability ~= nil) then
-		tooldef.tool_digging_properties = {
+		tooldef.tool_capabilities = {
 			full_punch_interval = tooldef.full_punch_interval,
 			basetime = tooldef.basetime,
 			dt_weight = tooldef.dt_weight,
@@ -711,18 +710,14 @@ minetest.register_item(":", {
 	type = "none",
 	wield_image = "wieldhand.png",
 	wield_scale = {x=1,y=1,z=2.5},
-	tool_digging_properties = {
+	tool_capabilities = {
 		full_punch_interval = 2.0,
-		basetime = 0.5,
-		dt_weight = 1,
-		dt_crackiness = 0,
-		dt_crumbliness = -1,
-		dt_cuttability = 0,
-		basedurability = 50,
-		dd_weight = 0,
-		dd_crackiness = 0,
-		dd_crumbliness = 0,
-		dd_cuttability = 0,
+		max_drop_level = 0,
+		groupcaps = {
+			fleshy = {times={[2]=2.00, [3]=1.00}, maxwear=0, maxlevel=1},
+			crumbly = {times={[3]=0.70}, maxwear=0, maxlevel=1},
+			snappy = {times={[3]=0.70}, maxwear=0, maxlevel=1},
+		}
 	}
 })
 
diff --git a/data/mods/default/init.lua b/data/mods/default/init.lua
index 7f63d9a7c..9750f610f 100644
--- a/data/mods/default/init.lua
+++ b/data/mods/default/init.lua
@@ -263,7 +263,7 @@
 -- - get_free_space(): returns get_stack_max() - get_count()
 -- - is_known(): returns true if the item name refers to a defined item type
 -- - get_definition(): returns the item definition table
--- - get_tool_digging_properties(): returns the digging properties of the item,
+-- - get_tool_capabilities(): returns the digging properties of the item,
 --   ^ or those of the hand if none are defined for this item type
 -- - add_wear(amount): increases wear by amount if the item is a tool
 -- - add_item(item): put some item or stack onto this stack,
@@ -322,7 +322,7 @@
 --     wield_scale = {x=1,y=1,z=1},
 --     stack_max = 99,
 --     liquids_pointable = false,
---     tool_digging_properties = {
+--     tool_capabilities = {
 --         full_punch_interval = 1.0,
 --         basetime = 1.0,
 --         dt_weight = 0.5,
@@ -371,14 +371,6 @@
 --     light_source = 0,
 --     damage_per_second = 0,
 --     selection_box = {type="regular"},
---     material = {
---         diggablity = "normal",
---         weight = 0,
---         crackiness = 0,
---         crumbliness = 0,
---         cuttability = 0,
---         flammability = 0,
---     },
 --     legacy_facedir_simple = false, -- Support maps made in and before January 2012
 --     legacy_wallmounted = false, -- Support maps made in and before January 2012
 -- }
@@ -455,209 +447,145 @@ default = {}
 minetest.register_tool("default:pick_wood", {
 	description = "Wooden Pickaxe",
 	inventory_image = "default_tool_woodpick.png",
-	tool_digging_properties = {
-		basetime = 2.0,
-		dt_weight = 0,
-		dt_crackiness = -0.5,
-		dt_crumbliness = 2,
-		dt_cuttability = 0,
-		basedurability = 30,
-		dd_weight = 0,
-		dd_crackiness = 0,
-		dd_crumbliness = 0,
-		dd_cuttability = 0,
+	tool_capabilities = {
+		max_drop_level=0,
+		groupcaps={
+			cracky={times={[2]=1.50, [3]=0.80}, maxwear=0.1, maxlevel=1}
+		}
 	},
 })
 minetest.register_tool("default:pick_stone", {
 	description = "Stone Pickaxe",
 	inventory_image = "default_tool_stonepick.png",
-	tool_digging_properties = {
-		basetime = 1.5,
-		dt_weight = 0,
-		dt_crackiness = -0.5,
-		dt_crumbliness = 2,
-		dt_cuttability = 0,
-		basedurability = 100,
-		dd_weight = 0,
-		dd_crackiness = 0,
-		dd_crumbliness = 0,
-		dd_cuttability = 0,
+	tool_capabilities = {
+		max_drop_level=0,
+		groupcaps={
+			cracky={times={[1]=1.50, [2]=0.80, [3]=0.60}, maxwear=0.05, maxlevel=1}
+		}
 	},
 })
 minetest.register_tool("default:pick_steel", {
 	description = "Steel Pickaxe",
 	inventory_image = "default_tool_steelpick.png",
-	tool_digging_properties = {
-		basetime = 1.0,
-		dt_weight = 0,
-		dt_crackiness = -0.5,
-		dt_crumbliness = 2,
-		dt_cuttability = 0,
-		basedurability = 333,
-		dd_weight = 0,
-		dd_crackiness = 0,
-		dd_crumbliness = 0,
-		dd_cuttability = 0,
+	tool_capabilities = {
+		max_drop_level=1,
+		groupcaps={
+			cracky={times={[1]=1.00, [2]=0.60, [3]=0.40}, maxwear=0.1, maxlevel=2}
+		}
 	},
 })
 minetest.register_tool("default:pick_mese", {
 	description = "Mese Pickaxe",
 	inventory_image = "default_tool_mesepick.png",
-	tool_digging_properties = {
-		basetime = 0,
-		dt_weight = 0,
-		dt_crackiness = 0,
-		dt_crumbliness = 0,
-		dt_cuttability = 0,
-		basedurability = 1337,
-		dd_weight = 0,
-		dd_crackiness = 0,
-		dd_crumbliness = 0,
-		dd_cuttability = 0,
+	tool_capabilities = {
+		max_drop_level=3,
+		groupcaps={
+			cracky={times={[1]=0.2, [2]=0.2, [3]=0.2}, maxwear=0.05, maxlevel=3},
+			crumbly={times={[1]=0.2, [2]=0.2, [3]=0.2}, maxwear=0.05, maxlevel=3},
+			snappy={times={[1]=0.2, [2]=0.2, [3]=0.2}, maxwear=0.05, maxlevel=3}
+		}
 	},
 })
 minetest.register_tool("default:shovel_wood", {
 	description = "Wooden Shovel",
 	inventory_image = "default_tool_woodshovel.png",
-	tool_digging_properties = {
-		basetime = 2.0,
-		dt_weight = 0.5,
-		dt_crackiness = 2,
-		dt_crumbliness = -1.5,
-		dt_cuttability = 0.3,
-		basedurability = 30,
-		dd_weight = 0,
-		dd_crackiness = 0,
-		dd_crumbliness = 0,
-		dd_cuttability = 0,
+	tool_capabilities = {
+		max_drop_level=0,
+		groupcaps={
+			crumbly={times={[1]=1.50, [2]=0.80, [3]=0.50}, maxwear=0.1, maxlevel=1}
+		}
 	},
 })
 minetest.register_tool("default:shovel_stone", {
 	description = "Stone Shovel",
 	inventory_image = "default_tool_stoneshovel.png",
-	tool_digging_properties = {
-		basetime = 1.5,
-		dt_weight = 0.5,
-		dt_crackiness = 2,
-		dt_crumbliness = -1.5,
-		dt_cuttability = 0.1,
-		basedurability = 100,
-		dd_weight = 0,
-		dd_crackiness = 0,
-		dd_crumbliness = 0,
-		dd_cuttability = 0,
+	tool_capabilities = {
+		max_drop_level=0,
+		groupcaps={
+			crumbly={times={[1]=0.80, [2]=0.50, [3]=0.30}, maxwear=0.05, maxlevel=1}
+		}
 	},
 })
 minetest.register_tool("default:shovel_steel", {
 	description = "Steel Shovel",
 	inventory_image = "default_tool_steelshovel.png",
-	tool_digging_properties = {
-		basetime = 1.0,
-		dt_weight = 0.5,
-		dt_crackiness = 2,
-		dt_crumbliness = -1.5,
-		dt_cuttability = 0.0,
-		basedurability = 330,
-		dd_weight = 0,
-		dd_crackiness = 0,
-		dd_crumbliness = 0,
-		dd_cuttability = 0,
+	tool_capabilities = {
+		max_drop_level=1,
+		groupcaps={
+			crumbly={times={[1]=0.50, [2]=0.35, [3]=0.30}, maxwear=0.1, maxlevel=2}
+		}
 	},
 })
 minetest.register_tool("default:axe_wood", {
 	description = "Wooden Axe",
 	inventory_image = "default_tool_woodaxe.png",
-	tool_digging_properties = {
-		basetime = 2.0,
-		dt_weight = 0.5,
-		dt_crackiness = -0.2,
-		dt_crumbliness = 1,
-		dt_cuttability = -0.5,
-		basedurability = 30,
-		dd_weight = 0,
-		dd_crackiness = 0,
-		dd_crumbliness = 0,
-		dd_cuttability = 0,
+	tool_capabilities = {
+		max_drop_level=0,
+		groupcaps={
+			choppy={times={[2]=1.50, [3]=0.80}, maxwear=0.1, maxlevel=1},
+			fleshy={times={[2]=1.50, [3]=0.80}, maxwear=0.1, maxlevel=1}
+		}
 	},
 })
 minetest.register_tool("default:axe_stone", {
 	description = "Stone Axe",
 	inventory_image = "default_tool_stoneaxe.png",
-	tool_digging_properties = {
-		basetime = 1.5,
-		dt_weight = 0.5,
-		dt_crackiness = -0.2,
-		dt_crumbliness = 1,
-		dt_cuttability = -0.5,
-		basedurability = 100,
-		dd_weight = 0,
-		dd_crackiness = 0,
-		dd_crumbliness = 0,
-		dd_cuttability = 0,
+	tool_capabilities = {
+		max_drop_level=0,
+		groupcaps={
+			choppy={times={[1]=1.50, [2]=1.00, [3]=0.60}, maxwear=0.05, maxlevel=1},
+			fleshy={times={[2]=1.30, [3]=0.70}, maxwear=0.05, maxlevel=1}
+		}
 	},
 })
 minetest.register_tool("default:axe_steel", {
 	description = "Steel Axe",
 	inventory_image = "default_tool_steelaxe.png",
-	tool_digging_properties = {
-		basetime = 1.0,
-		dt_weight = 0.5,
-		dt_crackiness = -0.2,
-		dt_crumbliness = 1,
-		dt_cuttability = -0.5,
-		basedurability = 330,
-		dd_weight = 0,
-		dd_crackiness = 0,
-		dd_crumbliness = 0,
-		dd_cuttability = 0,
+	tool_capabilities = {
+		max_drop_level=1,
+		groupcaps={
+			choppy={times={[1]=1.00, [2]=0.80, [3]=0.50}, maxwear=0.1, maxlevel=2},
+			fleshy={times={[2]=1.10, [3]=0.60}, maxwear=0.03, maxlevel=1}
+		}
 	},
 })
 minetest.register_tool("default:sword_wood", {
 	description = "Wooden Sword",
 	inventory_image = "default_tool_woodsword.png",
-	tool_digging_properties = {
-		basetime = 3.0,
-		dt_weight = 3,
-		dt_crackiness = 0,
-		dt_crumbliness = 1,
-		dt_cuttability = -1,
-		basedurability = 30,
-		dd_weight = 0,
-		dd_crackiness = 0,
-		dd_crumbliness = 0,
-		dd_cuttability = 0,
+	tool_capabilities = {
+		full_punch_interval = 2.0,
+		max_drop_level=0,
+		groupcaps={
+			fleshy={times={[2]=1.10, [3]=0.60}, maxwear=0.1, maxlevel=1},
+			snappy={times={[2]=1.00, [3]=0.50}, maxwear=0.1, maxlevel=1},
+			choppy={times={[3]=1.00}, maxwear=0.05, maxlevel=0}
+		}
 	}
 })
 minetest.register_tool("default:sword_stone", {
 	description = "Stone Sword",
 	inventory_image = "default_tool_stonesword.png",
-	tool_digging_properties = {
-		basetime = 2.5,
-		dt_weight = 3,
-		dt_crackiness = 0,
-		dt_crumbliness = 1,
-		dt_cuttability = -1,
-		basedurability = 100,
-		dd_weight = 0,
-		dd_crackiness = 0,
-		dd_crumbliness = 0,
-		dd_cuttability = 0,
+	tool_capabilities = {
+		full_punch_interval = 2.0,
+		max_drop_level=0,
+		groupcaps={
+			fleshy={times={[2]=0.80, [3]=0.40}, maxwear=0.05, maxlevel=1},
+			snappy={times={[2]=0.80, [3]=0.40}, maxwear=0.05, maxlevel=1},
+			choppy={times={[3]=0.90}, maxwear=0.05, maxlevel=0}
+		}
 	}
 })
 minetest.register_tool("default:sword_steel", {
 	description = "Steel Sword",
 	inventory_image = "default_tool_steelsword.png",
-	tool_digging_properties = {
-		basetime = 2.0,
-		dt_weight = 3,
-		dt_crackiness = 0,
-		dt_crumbliness = 1,
-		dt_cuttability = -1,
-		basedurability = 330,
-		dd_weight = 0,
-		dd_crackiness = 0,
-		dd_crumbliness = 0,
-		dd_cuttability = 0,
+	tool_capabilities = {
+		full_punch_interval = 2.0,
+		max_drop_level=1,
+		groupcaps={
+			fleshy={times={[1]=1.00, [2]=0.40, [3]=0.20}, maxwear=0.1, maxlevel=2},
+			snappy={times={[2]=0.70, [3]=0.30}, maxwear=0.03, maxlevel=1},
+			choppy={times={[3]=0.70}, maxwear=0.03, maxlevel=0}
+		}
 	}
 })
 
@@ -1110,7 +1038,7 @@ minetest.register_node("default:stone", {
 	description = "Stone",
 	tile_images = {"default_stone.png"},
 	is_ground_content = true,
-	material = minetest.digprop_stonelike(1.0),
+	groups = {cracky=3},
 	drop = 'default:cobble',
 	legacy_mineral = true,
 })
@@ -1119,7 +1047,7 @@ minetest.register_node("default:stone_with_coal", {
 	description = "Stone with coal",
 	tile_images = {"default_stone.png^default_mineral_coal.png"},
 	is_ground_content = true,
-	material = minetest.digprop_stonelike(1.0),
+	groups = {cracky=3},
 	drop = 'default:coal_lump',
 })
 
@@ -1127,7 +1055,7 @@ minetest.register_node("default:stone_with_iron", {
 	description = "Stone with iron",
 	tile_images = {"default_stone.png^default_mineral_iron.png"},
 	is_ground_content = true,
-	material = minetest.digprop_stonelike(1.0),
+	groups = {cracky=3},
 	drop = 'default:iron_lump',
 })
 
@@ -1135,7 +1063,7 @@ minetest.register_node("default:dirt_with_grass", {
 	description = "Dirt with grass",
 	tile_images = {"default_grass.png", "default_dirt.png", "default_dirt.png^default_grass_side.png"},
 	is_ground_content = true,
-	material = minetest.digprop_dirtlike(1.0),
+	groups = {crumbly=3},
 	drop = 'default:dirt',
 })
 
@@ -1143,7 +1071,7 @@ minetest.register_node("default:dirt_with_grass_footsteps", {
 	description = "Dirt with grass and footsteps",
 	tile_images = {"default_grass_footsteps.png", "default_dirt.png", "default_dirt.png^default_grass_side.png"},
 	is_ground_content = true,
-	material = minetest.digprop_dirtlike(1.0),
+	groups = {crumbly=3},
 	drop = 'default:dirt',
 })
 
@@ -1151,28 +1079,28 @@ minetest.register_node("default:dirt", {
 	description = "Dirt",
 	tile_images = {"default_dirt.png"},
 	is_ground_content = true,
-	material = minetest.digprop_dirtlike(1.0),
+	groups = {crumbly=3},
 })
 
 minetest.register_node("default:sand", {
 	description = "Sand",
 	tile_images = {"default_sand.png"},
 	is_ground_content = true,
-	material = minetest.digprop_dirtlike(1.0),
+	groups = {crumbly=3},
 })
 
 minetest.register_node("default:gravel", {
 	description = "Gravel",
 	tile_images = {"default_gravel.png"},
 	is_ground_content = true,
-	material = minetest.digprop_gravellike(1.0),
+	groups = {crumbly=2},
 })
 
 minetest.register_node("default:sandstone", {
 	description = "Sandstone",
 	tile_images = {"default_sandstone.png"},
 	is_ground_content = true,
-	material = minetest.digprop_dirtlike(1.0),  -- FIXME should this be stonelike?
+	groups = {crumbly=2,cracky=2},
 	drop = 'default:sand',
 })
 
@@ -1180,7 +1108,7 @@ minetest.register_node("default:clay", {
 	description = "Clay",
 	tile_images = {"default_clay.png"},
 	is_ground_content = true,
-	material = minetest.digprop_dirtlike(1.0),
+	groups = {crumbly=3},
 	drop = 'default:clay_lump 4',
 })
 
@@ -1188,7 +1116,7 @@ minetest.register_node("default:brick", {
 	description = "Brick",
 	tile_images = {"default_brick.png"},
 	is_ground_content = true,
-	material = minetest.digprop_stonelike(1.0),
+	groups = {cracky=3},
 	drop = 'default:clay_brick 4',
 })
 
@@ -1196,14 +1124,14 @@ minetest.register_node("default:tree", {
 	description = "Tree",
 	tile_images = {"default_tree_top.png", "default_tree_top.png", "default_tree.png"},
 	is_ground_content = true,
-	material = minetest.digprop_woodlike(1.0),
+	groups = {snappy=2},
 })
 
 minetest.register_node("default:jungletree", {
 	description = "Jungle Tree",
 	tile_images = {"default_jungletree_top.png", "default_jungletree_top.png", "default_jungletree.png"},
 	is_ground_content = true,
-	material = minetest.digprop_woodlike(1.0),
+	groups = {snappy=2},
 })
 
 minetest.register_node("default:junglegrass", {
@@ -1215,7 +1143,7 @@ minetest.register_node("default:junglegrass", {
 	wield_image = "default_junglegrass.png",
 	paramtype = "light",
 	walkable = false,
-	material = minetest.digprop_leaveslike(1.0),
+	groups = {snappy=3},
 })
 
 minetest.register_node("default:leaves", {
@@ -1224,7 +1152,7 @@ minetest.register_node("default:leaves", {
 	visual_scale = 1.3,
 	tile_images = {"default_leaves.png"},
 	paramtype = "light",
-	material = minetest.digprop_leaveslike(1.0),
+	groups = {snappy=3},
 	drop = {
 		max_items = 1,
 		items = {
@@ -1246,7 +1174,7 @@ minetest.register_node("default:cactus", {
 	description = "Cactus",
 	tile_images = {"default_cactus_top.png", "default_cactus_top.png", "default_cactus_side.png"},
 	is_ground_content = true,
-	material = minetest.digprop_woodlike(0.75),
+	groups = {snappy=2},
 })
 
 minetest.register_node("default:papyrus", {
@@ -1258,14 +1186,14 @@ minetest.register_node("default:papyrus", {
 	paramtype = "light",
 	is_ground_content = true,
 	walkable = false,
-	material = minetest.digprop_leaveslike(0.5),
+	groups = {snappy=3},
 })
 
 minetest.register_node("default:bookshelf", {
 	description = "Bookshelf",
 	tile_images = {"default_wood.png", "default_wood.png", "default_bookshelf.png"},
 	is_ground_content = true,
-	material = minetest.digprop_woodlike(0.75),
+	groups = {snappy=2},
 })
 
 minetest.register_node("default:glass", {
@@ -1276,7 +1204,7 @@ minetest.register_node("default:glass", {
 	paramtype = "light",
 	sunlight_propagates = true,
 	is_ground_content = true,
-	material = minetest.digprop_glasslike(1.0),
+	groups = {snappy=2,cracky=3},
 })
 
 minetest.register_node("default:fence_wood", {
@@ -1291,7 +1219,7 @@ minetest.register_node("default:fence_wood", {
 		type = "fixed",
 		fixed = {-1/7, -1/2, -1/7, 1/7, 1/2, 1/7},
 	},
-	material = minetest.digprop_woodlike(0.75),
+	groups = {snappy=2},
 })
 
 minetest.register_node("default:rail", {
@@ -1307,7 +1235,7 @@ minetest.register_node("default:rail", {
 		type = "fixed",
 		--fixed = <default>
 	},
-	material = minetest.digprop_dirtlike(0.75),
+	groups = {bendy=2,snappy=1},
 })
 
 minetest.register_node("default:ladder", {
@@ -1327,7 +1255,7 @@ minetest.register_node("default:ladder", {
 		--wall_bottom = = <default>
 		--wall_side = = <default>
 	},
-	material = minetest.digprop_woodlike(0.5),
+	groups = {snappy=2},
 	legacy_wallmounted = true,
 })
 
@@ -1335,14 +1263,14 @@ minetest.register_node("default:wood", {
 	description = "Wood",
 	tile_images = {"default_wood.png"},
 	is_ground_content = true,
-	material = minetest.digprop_woodlike(0.75),
+	groups = {snappy=2},
 })
 
 minetest.register_node("default:mese", {
 	description = "Mese",
 	tile_images = {"default_mese.png"},
 	is_ground_content = true,
-	material = minetest.digprop_stonelike(0.5),
+	groups = {cracky=1},
 })
 
 minetest.register_node("default:cloud", {
@@ -1371,6 +1299,7 @@ minetest.register_node("default:water_flowing", {
 		{image="default_water.png", backface_culling=false},
 		{image="default_water.png", backface_culling=true},
 	},
+	groups = {water=3, liquid=3},
 })
 
 minetest.register_node("default:water_source", {
@@ -1393,6 +1322,7 @@ minetest.register_node("default:water_source", {
 		-- New-style water source material (mostly unused)
 		{image="default_water.png", backface_culling=false},
 	},
+	groups = {water=3, liquid=3},
 })
 
 minetest.register_node("default:lava_flowing", {
@@ -1416,6 +1346,7 @@ minetest.register_node("default:lava_flowing", {
 		{image="default_lava.png", backface_culling=false},
 		{image="default_lava.png", backface_culling=true},
 	},
+	groups = {lava=3, liquid=2, hot=3},
 })
 
 minetest.register_node("default:lava_source", {
@@ -1439,6 +1370,7 @@ minetest.register_node("default:lava_source", {
 		-- New-style lava source material (mostly unused)
 		{image="default_lava.png", backface_culling=false},
 	},
+	groups = {lava=3, liquid=2, hot=3},
 })
 
 minetest.register_node("default:torch", {
@@ -1458,7 +1390,7 @@ minetest.register_node("default:torch", {
 		wall_bottom = {-0.1, -0.5, -0.1, 0.1, -0.5+0.6, 0.1},
 		wall_side = {-0.5, -0.3, -0.1, -0.5+0.3, 0.3, 0.1},
 	},
-	material = minetest.digprop_constanttime(0.0),
+	groups = {dig_immediate=1},
 	legacy_wallmounted = true,
 })
 
@@ -1479,7 +1411,7 @@ minetest.register_node("default:sign_wall", {
 		--wall_bottom = <default>
 		--wall_side = <default>
 	},
-	material = minetest.digprop_constanttime(0.5),
+	groups = {dig_immediate=2},
 	legacy_wallmounted = true,
 })
 
@@ -1489,7 +1421,7 @@ minetest.register_node("default:chest", {
 		"default_chest_side.png", "default_chest_side.png", "default_chest_front.png"},
 	paramtype2 = "facedir",
 	metadata_name = "chest",
-	material = minetest.digprop_woodlike(1.0),
+	groups = {snappy=2},
 	legacy_facedir_simple = true,
 })
 
@@ -1499,7 +1431,7 @@ minetest.register_node("default:chest_locked", {
 		"default_chest_side.png", "default_chest_side.png", "default_chest_lock.png"},
 	paramtype2 = "facedir",
 	metadata_name = "locked_chest",
-	material = minetest.digprop_woodlike(1.0),
+	groups = {snappy=2},
 	legacy_facedir_simple = true,
 })
 
@@ -1509,7 +1441,7 @@ minetest.register_node("default:furnace", {
 		"default_furnace_side.png", "default_furnace_side.png", "default_furnace_front.png"},
 	paramtype2 = "facedir",
 	metadata_name = "furnace",
-	material = minetest.digprop_stonelike(3.0),
+	groups = {cracky=2},
 	legacy_facedir_simple = true,
 })
 
@@ -1517,21 +1449,21 @@ minetest.register_node("default:cobble", {
 	description = "Cobble",
 	tile_images = {"default_cobble.png"},
 	is_ground_content = true,
-	material = minetest.digprop_stonelike(0.9),
+	groups = {cracky=3},
 })
 
 minetest.register_node("default:mossycobble", {
 	description = "Mossy Cobble",
 	tile_images = {"default_mossycobble.png"},
 	is_ground_content = true,
-	material = minetest.digprop_stonelike(0.8),
+	groups = {cracky=3},
 })
 
 minetest.register_node("default:steelblock", {
 	description = "Steel Block",
 	tile_images = {"default_steel_block.png"},
 	is_ground_content = true,
-	material = minetest.digprop_stonelike(5.0),
+	groups = {snappy=1,bendy=2},
 })
 
 minetest.register_node("default:nyancat", {
@@ -1540,7 +1472,7 @@ minetest.register_node("default:nyancat", {
 		"default_nc_side.png", "default_nc_back.png", "default_nc_front.png"},
 	inventory_image = "default_nc_front.png",
 	paramtype2 = "facedir",
-	material = minetest.digprop_stonelike(3.0),
+	groups = {cracky=2},
 	legacy_facedir_simple = true,
 })
 
@@ -1548,7 +1480,7 @@ minetest.register_node("default:nyancat_rainbow", {
 	description = "Nyancat Rainbow",
 	tile_images = {"default_nc_rb.png"},
 	inventory_image = "default_nc_rb.png",
-	material = minetest.digprop_stonelike(3.0),
+	groups = {cracky=2},
 })
 
 minetest.register_node("default:sapling", {
@@ -1560,7 +1492,7 @@ minetest.register_node("default:sapling", {
 	wield_image = "default_sapling.png",
 	paramtype = "light",
 	walkable = false,
-	material = minetest.digprop_constanttime(0.0),
+	groups = {dig_immediate=1},
 })
 
 minetest.register_node("default:apple", {
@@ -1572,7 +1504,7 @@ minetest.register_node("default:apple", {
 	paramtype = "light",
 	sunlight_propagates = true,
 	walkable = false,
-	material = minetest.digprop_constanttime(0.0),
+	groups = {dig_immediate=1},
 	on_use = minetest.item_eat(4),
 })
 
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index ee02d66f0..860722712 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -116,7 +116,7 @@ set(common_SRCS
 	serverobject.cpp
 	noise.cpp
 	porting.cpp
-	materials.cpp
+	tool.cpp
 	defaultsettings.cpp
 	mapnode.cpp
 	voxel.cpp
diff --git a/src/clientserver.h b/src/clientserver.h
index acb4f8530..8badd177e 100644
--- a/src/clientserver.h
+++ b/src/clientserver.h
@@ -44,9 +44,11 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 		Obsolete TOCLIENT_TOOLDEF
 		Obsolete TOCLIENT_CRAFTITEMDEF
 		Compress the contents of TOCLIENT_ITEMDEF and TOCLIENT_NODEDEF
+	PROTOCOL_VERSION 8:
+		Digging based on item groups
 */
 
-#define PROTOCOL_VERSION 7
+#define PROTOCOL_VERSION 8
 
 #define PROTOCOL_ID 0x4f457403
 
diff --git a/src/content_sao.cpp b/src/content_sao.cpp
index 02be64c64..cb4d81f9a 100644
--- a/src/content_sao.cpp
+++ b/src/content_sao.cpp
@@ -24,7 +24,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "main.h" // For g_profiler
 #include "profiler.h"
 #include "serialization.h" // For compressZlib
-#include "materials.h" // For MaterialProperties and ToolDiggingProperties
+#include "tool.h" // For ToolCapabilities
 #include "gamedef.h"
 
 core::map<u16, ServerActiveObject::Factory> ServerActiveObject::m_types;
@@ -723,24 +723,23 @@ void Oerkki1SAO::punch(ServerActiveObject *puncher, float time_from_last_punch)
 	v3f dir = (getBasePosition() - puncher->getBasePosition()).normalize();
 	m_speed_f += dir*12*BS;
 
-	// "Material" properties of an oerkki
-	MaterialProperties mp;
-	mp.diggability = DIGGABLE_NORMAL;
-	mp.crackiness = -1.0;
-	mp.cuttability = 1.0;
+	// "Material" groups of the object
+	std::map<std::string, int> groups;
+	groups["snappy"] = 1;
+	groups["choppy"] = 1;
+	groups["fleshy"] = 3;
 
 	IItemDefManager *idef = m_env->getGameDef()->idef();
-        ItemStack punchitem = puncher->getWieldedItem();
-        ToolDiggingProperties tp =
-	                punchitem.getToolDiggingProperties(idef);
+	ItemStack punchitem = puncher->getWieldedItem();
+	ToolCapabilities tp = punchitem.getToolCapabilities(idef);
 
-	HittingProperties hitprop = getHittingProperties(&mp, &tp,
+	HitParams hit_params = getHitParams(groups, &tp,
 			time_from_last_punch);
 
-	doDamage(hitprop.hp);
+	doDamage(hit_params.hp);
 	if(g_settings->getBool("creative_mode") == false)
 	{
-		punchitem.addWear(hitprop.wear, idef);
+		punchitem.addWear(hit_params.wear, idef);
 		puncher->setWieldedItem(punchitem);
 	}
 }
@@ -1419,24 +1418,23 @@ void MobV2SAO::punch(ServerActiveObject *puncher, float time_from_last_punch)
 	sendPosition();
 	
 
-	// "Material" properties of the MobV2
-	MaterialProperties mp;
-	mp.diggability = DIGGABLE_NORMAL;
-	mp.crackiness = -1.0;
-	mp.cuttability = 1.0;
+	// "Material" groups of the object
+	std::map<std::string, int> groups;
+	groups["snappy"] = 1;
+	groups["choppy"] = 1;
+	groups["fleshy"] = 3;
 
 	IItemDefManager *idef = m_env->getGameDef()->idef();
-        ItemStack punchitem = puncher->getWieldedItem();
-        ToolDiggingProperties tp =
-	                punchitem.getToolDiggingProperties(idef);
+	ItemStack punchitem = puncher->getWieldedItem();
+	ToolCapabilities tp = punchitem.getToolCapabilities(idef);
 
-	HittingProperties hitprop = getHittingProperties(&mp, &tp,
+	HitParams hit_params = getHitParams(groups, &tp,
 			time_from_last_punch);
 
-	doDamage(hitprop.hp);
+	doDamage(hit_params.hp);
 	if(g_settings->getBool("creative_mode") == false)
 	{
-		punchitem.addWear(hitprop.wear, idef);
+		punchitem.addWear(hit_params.wear, idef);
 		puncher->setWieldedItem(punchitem);
 	}
 }
@@ -1504,7 +1502,8 @@ void MobV2SAO::updateProperties()
 
 void MobV2SAO::doDamage(u16 d)
 {
-	infostream<<"MobV2 hp="<<m_hp<<" damage="<<d<<std::endl;
+	if(d > 0)
+		actionstream<<"MobV2 ("<<m_hp<<"hp) takes "<<d<<"hp of damage"<<std::endl;
 	
 	if(d < m_hp)
 	{
diff --git a/src/game.cpp b/src/game.cpp
index 670148a44..3009112f3 100644
--- a/src/game.cpp
+++ b/src/game.cpp
@@ -31,7 +31,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "guiInventoryMenu.h"
 #include "guiTextInputMenu.h"
 #include "guiDeathScreen.h"
-#include "materials.h"
+#include "tool.h"
 #include "config.h"
 #include "clouds.h"
 #include "camera.h"
@@ -1935,21 +1935,26 @@ void the_game(
 				MapNode n = client.getNode(nodepos);
 
 				// Get digging properties for material and tool
-				MaterialProperties mp = nodedef->get(n.getContent()).material;
-				ToolDiggingProperties tp =
-						playeritem.getToolDiggingProperties(itemdef);
-				DiggingProperties prop = getDiggingProperties(&mp, &tp);
+				ToolCapabilities tp = playeritem.getToolCapabilities(itemdef);
+				DigParams params = getDigParams(nodedef->get(n).groups, &tp);
+				// If can't dig, try hand
+				if(!params.diggable){
+					const ItemDefinition &hand = itemdef->get("");
+					const ToolCapabilities *tp = hand.tool_capabilities;
+					if(tp)
+						params = getDigParams(nodedef->get(n).groups, tp);
+				}
 
 				float dig_time_complete = 0.0;
 
-				if(prop.diggable == false)
+				if(params.diggable == false)
 				{
 					// I guess nobody will wait for this long
 					dig_time_complete = 10000000.0;
 				}
 				else
 				{
-					dig_time_complete = prop.time;
+					dig_time_complete = params.time;
 				}
 
 				if(dig_time_complete >= 0.001)
diff --git a/src/inventory.h b/src/inventory.h
index fcac5f647..e27da15d5 100644
--- a/src/inventory.h
+++ b/src/inventory.h
@@ -28,7 +28,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "debug.h"
 #include "itemdef.h"
 
-struct ToolDiggingProperties;
+struct ToolCapabilities;
 
 struct ItemStack
 {
@@ -107,15 +107,15 @@ struct ItemStack
 	}
 
 	// Get tool digging properties, or those of the hand if not a tool
-	const ToolDiggingProperties& getToolDiggingProperties(
+	const ToolCapabilities& getToolCapabilities(
 			IItemDefManager *itemdef) const
 	{
-		ToolDiggingProperties *prop;
-		prop = itemdef->get(name).tool_digging_properties;
-		if(prop == NULL)
-			prop = itemdef->get("").tool_digging_properties;
-		assert(prop != NULL);
-		return *prop;
+		ToolCapabilities *cap;
+		cap = itemdef->get(name).tool_capabilities;
+		if(cap == NULL)
+			cap = itemdef->get("").tool_capabilities;
+		assert(cap != NULL);
+		return *cap;
 	}
 
 	// Wear out (only tools)
diff --git a/src/itemdef.cpp b/src/itemdef.cpp
index 22ca9f088..98232c6d5 100644
--- a/src/itemdef.cpp
+++ b/src/itemdef.cpp
@@ -22,7 +22,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 
 #include "gamedef.h"
 #include "nodedef.h"
-#include "materials.h"
+#include "tool.h"
 #include "inventory.h"
 #ifndef SERVER
 #include "mapblock_mesh.h"
@@ -64,11 +64,12 @@ ItemDefinition& ItemDefinition::operator=(const ItemDefinition &def)
 	stack_max = def.stack_max;
 	usable = def.usable;
 	liquids_pointable = def.liquids_pointable;
-	if(def.tool_digging_properties)
+	if(def.tool_capabilities)
 	{
-		tool_digging_properties = new ToolDiggingProperties(
-				*def.tool_digging_properties);
+		tool_capabilities = new ToolCapabilities(
+				*def.tool_capabilities);
 	}
+	groups = def.groups;
 #ifndef SERVER
 	inventory_texture = def.inventory_texture;
 	if(def.wield_mesh)
@@ -88,7 +89,7 @@ ItemDefinition::~ItemDefinition()
 void ItemDefinition::resetInitial()
 {
 	// Initialize pointers to NULL so reset() does not delete undefined pointers
-	tool_digging_properties = NULL;
+	tool_capabilities = NULL;
 #ifndef SERVER
 	inventory_texture = NULL;
 	wield_mesh = NULL;
@@ -107,11 +108,12 @@ void ItemDefinition::reset()
 	stack_max = 99;
 	usable = false;
 	liquids_pointable = false;
-	if(tool_digging_properties)
+	if(tool_capabilities)
 	{
-		delete tool_digging_properties;
-		tool_digging_properties = NULL;
+		delete tool_capabilities;
+		tool_capabilities = NULL;
 	}
+	groups.clear();
 
 #ifndef SERVER
 	inventory_texture = NULL;
@@ -125,7 +127,7 @@ void ItemDefinition::reset()
 
 void ItemDefinition::serialize(std::ostream &os) const
 {
-	writeU8(os, 0); // version
+	writeU8(os, 1); // version
 	writeU8(os, type);
 	os<<serializeString(name);
 	os<<serializeString(description);
@@ -135,14 +137,19 @@ void ItemDefinition::serialize(std::ostream &os) const
 	writeS16(os, stack_max);
 	writeU8(os, usable);
 	writeU8(os, liquids_pointable);
-	std::string tool_digging_properties_s = "";
-	if(tool_digging_properties)
-	{
+	std::string tool_capabilities_s = "";
+	if(tool_capabilities){
 		std::ostringstream tmp_os(std::ios::binary);
-		tool_digging_properties->serialize(tmp_os);
-		tool_digging_properties_s = tmp_os.str();
+		tool_capabilities->serialize(tmp_os);
+		tool_capabilities_s = tmp_os.str();
+	}
+	os<<serializeString(tool_capabilities_s);
+	writeU16(os, groups.size());
+	for(std::map<std::string, int>::const_iterator
+			i = groups.begin(); i != groups.end(); i++){
+		os<<serializeString(i->first);
+		writeS16(os, i->second);
 	}
-	os<<serializeString(tool_digging_properties_s);
 }
 
 void ItemDefinition::deSerialize(std::istream &is)
@@ -152,7 +159,7 @@ void ItemDefinition::deSerialize(std::istream &is)
 
 	// Deserialize
 	int version = readU8(is);
-	if(version != 0)
+	if(version != 1)
 		throw SerializationError("unsupported ItemDefinition version");
 	type = (enum ItemType)readU8(is);
 	name = deSerializeString(is);
@@ -163,12 +170,19 @@ void ItemDefinition::deSerialize(std::istream &is)
 	stack_max = readS16(is);
 	usable = readU8(is);
 	liquids_pointable = readU8(is);
-	std::string tool_digging_properties_s = deSerializeString(is);
-	if(!tool_digging_properties_s.empty())
+	std::string tool_capabilities_s = deSerializeString(is);
+	if(!tool_capabilities_s.empty())
 	{
-		std::istringstream tmp_is(tool_digging_properties_s, std::ios::binary);
-		tool_digging_properties = new ToolDiggingProperties;
-		tool_digging_properties->deSerialize(tmp_is);
+		std::istringstream tmp_is(tool_capabilities_s, std::ios::binary);
+		tool_capabilities = new ToolCapabilities;
+		tool_capabilities->deSerialize(tmp_is);
+	}
+	groups.clear();
+	u32 groups_size = readU16(is);
+	for(u32 i=0; i<groups_size; i++){
+		std::string name = deSerializeString(is);
+		int value = readS16(is);
+		groups[name] = value;
 	}
 }
 
@@ -253,7 +267,7 @@ public:
 		ItemDefinition* hand_def = new ItemDefinition;
 		hand_def->name = "";
 		hand_def->wield_image = "wieldhand.png";
-		hand_def->tool_digging_properties = new ToolDiggingProperties;
+		hand_def->tool_capabilities = new ToolCapabilities;
 		m_item_definitions.insert(std::make_pair("", hand_def));
 
 		ItemDefinition* unknown_def = new ItemDefinition;
@@ -273,9 +287,9 @@ public:
 	virtual void registerItem(const ItemDefinition &def)
 	{
 		infostream<<"ItemDefManager: registering \""<<def.name<<"\""<<std::endl;
-		// Ensure that the "" item (the hand) always has ToolDiggingProperties
+		// Ensure that the "" item (the hand) always has ToolCapabilities
 		if(def.name == "")
-			assert(def.tool_digging_properties != NULL);
+			assert(def.tool_capabilities != NULL);
 
 		m_item_definitions[def.name] = new ItemDefinition(def);
 
diff --git a/src/itemdef.h b/src/itemdef.h
index 5a432591d..15734ff44 100644
--- a/src/itemdef.h
+++ b/src/itemdef.h
@@ -25,8 +25,22 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include <string>
 #include <iostream>
 #include <set>
+#include <map>
 class IGameDef;
-struct ToolDiggingProperties;
+struct ToolCapabilities;
+
+/*
+	Some helpers
+*/
+
+static inline int itemgroup_get(const std::map<std::string, int> &groups,
+		const std::string &name)
+{
+	std::map<std::string, int>::const_iterator i = groups.find(name);
+	if(i == groups.end())
+		return 0;
+	return i->second;
+}
 
 /*
 	Base item definition
@@ -63,7 +77,8 @@ struct ItemDefinition
 	bool usable;
 	bool liquids_pointable;
 	// May be NULL. If non-NULL, deleted by destructor
-	ToolDiggingProperties *tool_digging_properties;
+	ToolCapabilities *tool_capabilities;
+	std::map<std::string, int> groups;
 
 	/*
 		Cached stuff
diff --git a/src/main.cpp b/src/main.cpp
index 2875474f1..ec999c530 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -399,7 +399,6 @@ Doing currently:
 #include "filesys.h"
 #include "config.h"
 #include "guiMainMenu.h"
-#include "materials.h"
 #include "game.h"
 #include "keycode.h"
 #include "tile.h"
diff --git a/src/materials.cpp b/src/materials.cpp
deleted file mode 100644
index c37b7c505..000000000
--- a/src/materials.cpp
+++ /dev/null
@@ -1,159 +0,0 @@
-/*
-Minetest-c55
-Copyright (C) 2011 celeron55, Perttu Ahola <celeron55@gmail.com>
-
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License along
-with this program; if not, write to the Free Software Foundation, Inc.,
-51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
-*/
-
-#include "materials.h"
-#include "utility.h"
-
-void MaterialProperties::serialize(std::ostream &os)
-{
-	writeU8(os, 0); // version
-	writeU8(os, diggability);
-	writeF1000(os, constant_time);
-	writeF1000(os, weight);
-	writeF1000(os, crackiness);
-	writeF1000(os, crumbliness);
-	writeF1000(os, cuttability);
-	writeF1000(os, flammability);
-}
-
-void MaterialProperties::deSerialize(std::istream &is)
-{
-	int version = readU8(is);
-	if(version != 0)
-		throw SerializationError("unsupported MaterialProperties version");
-	diggability = (enum Diggability)readU8(is);
-	constant_time = readF1000(is);
-	weight = readF1000(is);
-	crackiness = readF1000(is);
-	crumbliness = readF1000(is);
-	cuttability = readF1000(is);
-	flammability = readF1000(is);
-}
-
-ToolDiggingProperties::ToolDiggingProperties(float full_punch_interval_,
-		float a, float b, float c, float d, float e,
-		float f, float g, float h, float i, float j):
-	full_punch_interval(full_punch_interval_),
-	basetime(a),
-	dt_weight(b),
-	dt_crackiness(c),
-	dt_crumbliness(d),
-	dt_cuttability(e),
-	basedurability(f),
-	dd_weight(g),
-	dd_crackiness(h),
-	dd_crumbliness(i),
-	dd_cuttability(j)
-{}
-
-void ToolDiggingProperties::serialize(std::ostream &os)
-{
-	writeU8(os, 0); // version
-	writeF1000(os, full_punch_interval);
-	writeF1000(os, basetime);
-	writeF1000(os, dt_weight);
-	writeF1000(os, dt_crackiness);
-	writeF1000(os, dt_crumbliness);
-	writeF1000(os, dt_cuttability);
-	writeF1000(os, basedurability);
-	writeF1000(os, dd_weight);
-	writeF1000(os, dd_crackiness);
-	writeF1000(os, dd_crumbliness);
-	writeF1000(os, dd_cuttability);
-}
-
-void ToolDiggingProperties::deSerialize(std::istream &is)
-{
-	int version = readU8(is);
-	if(version != 0) throw SerializationError(
-			"unsupported ToolDiggingProperties version");
-	full_punch_interval = readF1000(is);
-	basetime = readF1000(is);
-	dt_weight = readF1000(is);
-	dt_crackiness = readF1000(is);
-	dt_crumbliness = readF1000(is);
-	dt_cuttability = readF1000(is);
-	basedurability = readF1000(is);
-	dd_weight = readF1000(is);
-	dd_crackiness = readF1000(is);
-	dd_crumbliness = readF1000(is);
-	dd_cuttability = readF1000(is);
-}
-
-DiggingProperties getDiggingProperties(const MaterialProperties *mp,
-		const ToolDiggingProperties *tp, float time_from_last_punch)
-{
-	if(mp->diggability == DIGGABLE_NOT)
-		return DiggingProperties(false, 0, 0);
-	if(mp->diggability == DIGGABLE_CONSTANT)
-		return DiggingProperties(true, mp->constant_time, 0);
-
-	float time = tp->basetime;
-	time += tp->dt_weight * mp->weight;
-	time += tp->dt_crackiness * mp->crackiness;
-	time += tp->dt_crumbliness * mp->crumbliness;
-	time += tp->dt_cuttability * mp->cuttability;
-	if(time < 0.2)
-		time = 0.2;
-
-	float durability = tp->basedurability;
-	durability += tp->dd_weight * mp->weight;
-	durability += tp->dd_crackiness * mp->crackiness;
-	durability += tp->dd_crumbliness * mp->crumbliness;
-	durability += tp->dd_cuttability * mp->cuttability;
-	if(durability < 1)
-		durability = 1;
-	
-	if(time_from_last_punch < tp->full_punch_interval){
-		float f = time_from_last_punch / tp->full_punch_interval;
-		time /= f;
-		durability /= f;
-	}
-
-	float wear = 1.0 / durability;
-	u16 wear_i = 65535.*wear;
-	return DiggingProperties(true, time, wear_i);
-}
-
-DiggingProperties getDiggingProperties(const MaterialProperties *mp,
-		const ToolDiggingProperties *tp)
-{
-	return getDiggingProperties(mp, tp, 1000000);
-}
-
-HittingProperties getHittingProperties(const MaterialProperties *mp,
-		const ToolDiggingProperties *tp, float time_from_last_punch)
-{
-	DiggingProperties digprop = getDiggingProperties(mp, tp,
-			time_from_last_punch);
-	
-	// If digging time would be 1 second, 2 hearts go in 1 second.
-	s16 hp = 2.0 * 2.0 / digprop.time;
-	// Wear is the same as for digging a single node
-	s16 wear = (float)digprop.wear;
-
-	return HittingProperties(hp, wear);
-}
-
-HittingProperties getHittingProperties(const MaterialProperties *mp,
-		const ToolDiggingProperties *tp)
-{
-	return getHittingProperties(mp, tp, 1000000);
-}
-
diff --git a/src/materials.h b/src/materials.h
deleted file mode 100644
index 058b2ab85..000000000
--- a/src/materials.h
+++ /dev/null
@@ -1,137 +0,0 @@
-/*
-Minetest-c55
-Copyright (C) 2010-2011 celeron55, Perttu Ahola <celeron55@gmail.com>
-
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License along
-with this program; if not, write to the Free Software Foundation, Inc.,
-51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
-*/
-
-#ifndef MATERIALS_HEADER
-#define MATERIALS_HEADER
-
-/*
-	Material properties
-*/
-
-#include "common_irrlicht.h"
-#include <string>
-#include <iostream>
-
-enum Diggability
-{
-	DIGGABLE_NOT,
-	DIGGABLE_NORMAL,
-	DIGGABLE_CONSTANT
-};
-
-struct MaterialProperties
-{
-	// Values can be anything. 0 is normal.
-	
-	enum Diggability diggability;
-
-	// Constant time for DIGGABLE_CONSTANT
-	float constant_time;
-
-	// Weight; the amount of stuff in the block. Not realistic.
-	float weight;
-	// Rock; wood a bit.
-	// A Pickaxe manages high crackiness well.
-	float crackiness;
-	// Sand is extremely crumble; dirt is quite crumble.
-	// A shovel is good for crumbly stuff. Pickaxe is horrible.
-	float crumbliness;
-	// An axe is best for cuttable heavy stuff.
-	// Sword is best for cuttable light stuff.
-	float cuttability;
-	// If high, ignites easily
-	float flammability;
-
-	MaterialProperties():
-		diggability(DIGGABLE_NOT),
-		constant_time(0.5),
-		weight(0),
-		crackiness(0),
-		crumbliness(0),
-		cuttability(0),
-		flammability(0)
-	{}
-
-	void serialize(std::ostream &os);
-	void deSerialize(std::istream &is);
-};
-
-struct ToolDiggingProperties
-{
-	// time = basetime + sum(feature here * feature in MaterialProperties)
-	float full_punch_interval;
-	float basetime;
-	float dt_weight;
-	float dt_crackiness;
-	float dt_crumbliness;
-	float dt_cuttability;
-	float basedurability;
-	float dd_weight;
-	float dd_crackiness;
-	float dd_crumbliness;
-	float dd_cuttability;
-
-	ToolDiggingProperties(float full_punch_interval_=2.0,
-			float a=0.75, float b=0, float c=0, float d=0, float e=0,
-			float f=50, float g=0, float h=0, float i=0, float j=0);
-
-	void serialize(std::ostream &os);
-	void deSerialize(std::istream &is);
-};
-
-struct DiggingProperties
-{
-	bool diggable;
-	// Digging time in seconds
-	float time;
-	// Caused wear
-	u16 wear;
-
-	DiggingProperties(bool a_diggable=false, float a_time=0, u16 a_wear=0):
-		diggable(a_diggable),
-		time(a_time),
-		wear(a_wear)
-	{}
-};
-
-DiggingProperties getDiggingProperties(const MaterialProperties *mp,
-		const ToolDiggingProperties *tp, float time_from_last_punch);
-
-DiggingProperties getDiggingProperties(const MaterialProperties *mp,
-		const ToolDiggingProperties *tp);
-
-struct HittingProperties
-{
-	s16 hp;
-	s16 wear;
-
-	HittingProperties(s16 hp_=0, s16 wear_=0):
-		hp(hp_),
-		wear(wear_)
-	{}
-};
-
-HittingProperties getHittingProperties(const MaterialProperties *mp,
-		const ToolDiggingProperties *tp, float time_from_last_punch);
-
-HittingProperties getHittingProperties(const MaterialProperties *mp,
-		const ToolDiggingProperties *tp);
-
-#endif
-
diff --git a/src/nodedef.cpp b/src/nodedef.cpp
index 0c2793a0e..7d0408eb7 100644
--- a/src/nodedef.cpp
+++ b/src/nodedef.cpp
@@ -118,6 +118,7 @@ void ContentFeatures::reset()
 		      in builtin.lua
 	*/
 	name = "";
+	groups.clear();
 	drawtype = NDT_NORMAL;
 	visual_scale = 1.0;
 	for(u32 i=0; i<6; i++)
@@ -144,18 +145,20 @@ void ContentFeatures::reset()
 	light_source = 0;
 	damage_per_second = 0;
 	selection_box = NodeBox();
-	material = MaterialProperties();
-	// Make unknown blocks diggable
-	material.diggability = DIGGABLE_CONSTANT;
-	material.constant_time = 0.5;
 	legacy_facedir_simple = false;
 	legacy_wallmounted = false;
 }
 
 void ContentFeatures::serialize(std::ostream &os)
 {
-	writeU8(os, 1); // version
+	writeU8(os, 2); // version
 	os<<serializeString(name);
+	writeU16(os, groups.size());
+	for(std::map<std::string, int>::const_iterator
+			i = groups.begin(); i != groups.end(); i++){
+		os<<serializeString(i->first);
+		writeS16(os, i->second);
+	}
 	writeU8(os, drawtype);
 	writeF1000(os, visual_scale);
 	writeU8(os, 6);
@@ -188,7 +191,6 @@ void ContentFeatures::serialize(std::ostream &os)
 	writeU8(os, light_source);
 	writeU32(os, damage_per_second);
 	selection_box.serialize(os);
-	material.serialize(os);
 	writeU8(os, legacy_facedir_simple);
 	writeU8(os, legacy_wallmounted);
 }
@@ -196,9 +198,16 @@ void ContentFeatures::serialize(std::ostream &os)
 void ContentFeatures::deSerialize(std::istream &is)
 {
 	int version = readU8(is);
-	if(version != 1)
+	if(version != 2)
 		throw SerializationError("unsupported ContentFeatures version");
 	name = deSerializeString(is);
+	groups.clear();
+	u32 groups_size = readU16(is);
+	for(u32 i=0; i<groups_size; i++){
+		std::string name = deSerializeString(is);
+		int value = readS16(is);
+		groups[name] = value;
+	}
 	drawtype = (enum NodeDrawType)readU8(is);
 	visual_scale = readF1000(is);
 	if(readU8(is) != 6)
@@ -233,7 +242,6 @@ void ContentFeatures::deSerialize(std::istream &is)
 	light_source = readU8(is);
 	damage_per_second = readU32(is);
 	selection_box.deSerialize(is);
-	material.deSerialize(is);
 	legacy_facedir_simple = readU8(is);
 	legacy_wallmounted = readU8(is);
 }
@@ -412,9 +420,6 @@ public:
 		assert(name != "");
 		ContentFeatures f;
 		f.name = name;
-		// Make unknown blocks diggable
-		f.material.diggability = DIGGABLE_CONSTANT;
-		f.material.constant_time = 0.5;
 		return set(name, f);
 	}
 	virtual void updateAliases(IItemDefManager *idef)
diff --git a/src/nodedef.h b/src/nodedef.h
index 9524385cf..5196e0233 100644
--- a/src/nodedef.h
+++ b/src/nodedef.h
@@ -23,12 +23,11 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "common_irrlicht.h"
 #include <string>
 #include <iostream>
-#include <set>
+#include <map>
 #include "mapnode.h"
 #ifndef SERVER
 #include "tile.h"
 #endif
-#include "materials.h" // MaterialProperties
 class IItemDefManager;
 class ITextureSource;
 class IGameDef;
@@ -149,6 +148,7 @@ struct ContentFeatures
 	*/
 
 	std::string name; // "" = undefined node
+	std::map<std::string, int> groups; // Same as in itemdef
 
 	// Visual definition
 	enum NodeDrawType drawtype;
@@ -194,7 +194,6 @@ struct ContentFeatures
 	u8 light_source;
 	u32 damage_per_second;
 	NodeBox selection_box;
-	MaterialProperties material;
 	// Compatibility with old maps
 	// Set to true if paramtype used to be 'facedir_simple'
 	bool legacy_facedir_simple;
diff --git a/src/scriptapi.cpp b/src/scriptapi.cpp
index 8350c75f1..2ee727b3f 100644
--- a/src/scriptapi.cpp
+++ b/src/scriptapi.cpp
@@ -45,6 +45,7 @@ extern "C" {
 #include "mapblock.h" // For getNodeBlockPos
 #include "content_nodemeta.h"
 #include "utility.h"
+#include "tool.h"
 
 static void stackDump(lua_State *L, std::ostream &o)
 {
@@ -416,14 +417,6 @@ struct EnumString es_NodeBoxType[] =
 	{0, NULL},
 };
 
-struct EnumString es_Diggability[] =
-{
-	{DIGGABLE_NOT, "not"},
-	{DIGGABLE_NORMAL, "normal"},
-	{DIGGABLE_CONSTANT, "constant"},
-	{0, NULL},
-};
-
 /*
 	C struct <-> Lua table converter functions
 */
@@ -612,6 +605,7 @@ static core::aabbox3d<f32> read_aabbox3df32(lua_State *L, int index, f32 scale)
 	return box;
 }
 
+#if 0
 /*
 	MaterialProperties
 */
@@ -630,87 +624,156 @@ static MaterialProperties read_material_properties(
 	getfloatfield(L, -1, "flammability", prop.flammability);
 	return prop;
 }
+#endif
 
 /*
-	ToolDiggingProperties
+	Groups
+*/
+static void read_groups(lua_State *L, int index,
+		std::map<std::string, int> &result)
+{
+	result.clear();
+	lua_pushnil(L);
+	if(index < 0)
+		index -= 1;
+	while(lua_next(L, index) != 0){
+		// key at index -2 and value at index -1
+		std::string name = luaL_checkstring(L, -2);
+		int rating = luaL_checkinteger(L, -1);
+		result[name] = rating;
+		// removes value, keeps key for next iteration
+		lua_pop(L, 1);
+	}
+}
+
+/*
+	ToolCapabilities
 */
 
-static ToolDiggingProperties read_tool_digging_properties(
+static ToolCapabilities read_tool_capabilities(
 		lua_State *L, int table)
 {
-	ToolDiggingProperties prop;
-	getfloatfield(L, table, "full_punch_interval", prop.full_punch_interval);
-	getfloatfield(L, table, "basetime", prop.basetime);
-	getfloatfield(L, table, "dt_weight", prop.dt_weight);
-	getfloatfield(L, table, "dt_crackiness", prop.dt_crackiness);
-	getfloatfield(L, table, "dt_crumbliness", prop.dt_crumbliness);
-	getfloatfield(L, table, "dt_cuttability", prop.dt_cuttability);
-	getfloatfield(L, table, "basedurability", prop.basedurability);
-	getfloatfield(L, table, "dd_weight", prop.dd_weight);
-	getfloatfield(L, table, "dd_crackiness", prop.dd_crackiness);
-	getfloatfield(L, table, "dd_crumbliness", prop.dd_crumbliness);
-	getfloatfield(L, table, "dd_cuttability", prop.dd_cuttability);
-	return prop;
+	ToolCapabilities toolcap;
+	getfloatfield(L, table, "full_punch_interval", toolcap.full_punch_interval);
+	getintfield(L, table, "max_drop_level", toolcap.max_drop_level);
+	lua_getfield(L, table, "groupcaps");
+	if(lua_istable(L, -1)){
+		int table_groupcaps = lua_gettop(L);
+		lua_pushnil(L);
+		while(lua_next(L, table_groupcaps) != 0){
+			// key at index -2 and value at index -1
+			std::string groupname = luaL_checkstring(L, -2);
+			if(lua_istable(L, -1)){
+				int table_groupcap = lua_gettop(L);
+				// This will be created
+				ToolGroupCap groupcap;
+				// Read simple parameters
+				getfloatfield(L, table_groupcap, "maxwear", groupcap.maxwear);
+				getintfield(L, table_groupcap, "maxlevel", groupcap.maxlevel);
+				// Read "times" table
+				lua_getfield(L, table_groupcap, "times");
+				if(lua_istable(L, -1)){
+					int table_times = lua_gettop(L);
+					lua_pushnil(L);
+					while(lua_next(L, table_times) != 0){
+						// key at index -2 and value at index -1
+						int rating = luaL_checkinteger(L, -2);
+						float time = luaL_checknumber(L, -1);
+						groupcap.times[rating] = time;
+						// removes value, keeps key for next iteration
+						lua_pop(L, 1);
+					}
+				}
+				lua_pop(L, 1);
+				// Insert groupcap into toolcap
+				toolcap.groupcaps[groupname] = groupcap;
+			}
+			// removes value, keeps key for next iteration
+			lua_pop(L, 1);
+		}
+	}
+	lua_pop(L, 1);
+	return toolcap;
 }
 
-static void set_tool_digging_properties(lua_State *L, int table,
-		const ToolDiggingProperties &prop)
+static void set_tool_capabilities(lua_State *L, int table,
+		const ToolCapabilities &toolcap)
 {
-	setfloatfield(L, table, "full_punch_interval", prop.full_punch_interval);
-	setfloatfield(L, table, "basetime", prop.basetime);
-	setfloatfield(L, table, "dt_weight", prop.dt_weight);
-	setfloatfield(L, table, "dt_crackiness", prop.dt_crackiness);
-	setfloatfield(L, table, "dt_crumbliness", prop.dt_crumbliness);
-	setfloatfield(L, table, "dt_cuttability", prop.dt_cuttability);
-	setfloatfield(L, table, "basedurability", prop.basedurability);
-	setfloatfield(L, table, "dd_weight", prop.dd_weight);
-	setfloatfield(L, table, "dd_crackiness", prop.dd_crackiness);
-	setfloatfield(L, table, "dd_crumbliness", prop.dd_crumbliness);
-	setfloatfield(L, table, "dd_cuttability", prop.dd_cuttability);
+	setfloatfield(L, table, "full_punch_interval", toolcap.full_punch_interval);
+	setintfield(L, table, "max_drop_level", toolcap.max_drop_level);
+	// Create groupcaps table
+	lua_newtable(L);
+	// For each groupcap
+	for(std::map<std::string, ToolGroupCap>::const_iterator
+			i = toolcap.groupcaps.begin(); i != toolcap.groupcaps.end(); i++){
+		// Create groupcap table
+		lua_newtable(L);
+		const std::string &name = i->first;
+		const ToolGroupCap &groupcap = i->second;
+		// Create subtable "times"
+		lua_newtable(L);
+		for(std::map<int, float>::const_iterator
+				i = groupcap.times.begin(); i != groupcap.times.end(); i++){
+			int rating = i->first;
+			float time = i->second;
+			lua_pushinteger(L, rating);
+			lua_pushnumber(L, time);
+			lua_settable(L, -3);
+		}
+		// Set subtable "times"
+		lua_setfield(L, -2, "times");
+		// Set simple parameters
+		setfloatfield(L, -1, "maxwear", groupcap.maxwear);
+		setintfield(L, -1, "maxlevel", groupcap.maxlevel);
+		// Insert groupcap table into groupcaps table
+		lua_setfield(L, -2, name.c_str());
+	}
+	// Set groupcaps table
+	lua_setfield(L, -2, "groupcaps");
 }
 
-static void push_tool_digging_properties(lua_State *L,
-		const ToolDiggingProperties &prop)
+static void push_tool_capabilities(lua_State *L,
+		const ToolCapabilities &prop)
 {
 	lua_newtable(L);
-	set_tool_digging_properties(L, -1, prop);
+	set_tool_capabilities(L, -1, prop);
 }
 
 /*
-	DiggingProperties
+	DigParams
 */
 
-static void set_digging_properties(lua_State *L, int table,
-		const DiggingProperties &prop)
+static void set_dig_params(lua_State *L, int table,
+		const DigParams &params)
 {
-	setboolfield(L, table, "diggable", prop.diggable);
-	setfloatfield(L, table, "time", prop.time);
-	setintfield(L, table, "wear", prop.wear);
+	setboolfield(L, table, "diggable", params.diggable);
+	setfloatfield(L, table, "time", params.time);
+	setintfield(L, table, "wear", params.wear);
 }
 
-static void push_digging_properties(lua_State *L,
-		const DiggingProperties &prop)
+static void push_dig_params(lua_State *L,
+		const DigParams &params)
 {
 	lua_newtable(L);
-	set_digging_properties(L, -1, prop);
+	set_dig_params(L, -1, params);
 }
 
 /*
-	HittingProperties
+	HitParams
 */
 
-static void set_hitting_properties(lua_State *L, int table,
-		const HittingProperties &prop)
+static void set_hit_params(lua_State *L, int table,
+		const HitParams &params)
 {
-	setintfield(L, table, "hp", prop.hp);
-	setintfield(L, table, "wear", prop.wear);
+	setintfield(L, table, "hp", params.hp);
+	setintfield(L, table, "wear", params.wear);
 }
 
-static void push_hitting_properties(lua_State *L,
-		const HittingProperties &prop)
+static void push_hit_params(lua_State *L,
+		const HitParams &params)
 {
 	lua_newtable(L);
-	set_hitting_properties(L, -1, prop);
+	set_hit_params(L, -1, params);
 }
 
 /*
@@ -778,20 +841,26 @@ static ItemDefinition read_item_definition(lua_State *L, int index)
 
 	getboolfield(L, index, "liquids_pointable", def.liquids_pointable);
 
-	lua_getfield(L, index, "tool_digging_properties");
+	warn_if_field_exists(L, index, "tool_digging_properties",
+			"deprecated: use tool_capabilities");
+	
+	lua_getfield(L, index, "tool_capabilities");
 	if(lua_istable(L, -1)){
-		def.tool_digging_properties = new ToolDiggingProperties(
-				read_tool_digging_properties(L, -1));
+		def.tool_capabilities = new ToolCapabilities(
+				read_tool_capabilities(L, -1));
 	}
-	lua_pop(L, 1);
 
-	// If name is "" (hand), ensure there are ToolDiggingProperties
+	// If name is "" (hand), ensure there are ToolCapabilities
 	// because it will be looked up there whenever any other item has
-	// no ToolDiggingProperties
-	if(def.name == "" && def.tool_digging_properties == NULL){
-		def.tool_digging_properties = new ToolDiggingProperties();
+	// no ToolCapabilities
+	if(def.name == "" && def.tool_capabilities == NULL){
+		def.tool_capabilities = new ToolCapabilities();
 	}
 
+	lua_getfield(L, index, "groups");
+	read_groups(L, -1, def.groups);
+	lua_pop(L, 1);
+
 	return def;
 }
 
@@ -805,8 +874,14 @@ static ContentFeatures read_content_features(lua_State *L, int index)
 		index = lua_gettop(L) + 1 + index;
 
 	ContentFeatures f;
+	/* Name */
 	getstringfield(L, index, "name", f.name);
 
+	/* Groups */
+	lua_getfield(L, index, "groups");
+	read_groups(L, -1, f.groups);
+	lua_pop(L, 1);
+
 	/* Visual definition */
 
 	f.drawtype = (NodeDrawType)getenumfield(L, index, "drawtype", es_DrawType,
@@ -958,12 +1033,6 @@ static ContentFeatures read_content_features(lua_State *L, int index)
 	}
 	lua_pop(L, 1);
 
-	lua_getfield(L, index, "material");
-	if(lua_istable(L, -1)){
-		f.material = read_material_properties(L, -1);
-	}
-	lua_pop(L, 1);
-
 	// Set to true if paramtype used to be 'facedir_simple'
 	getboolfield(L, index, "legacy_facedir_simple", f.legacy_facedir_simple);
 	// Set to true if wall_mounted used to be set to true
@@ -1215,16 +1284,16 @@ private:
 		return 1;
 	}
 
-	// get_tool_digging_properties(self) -> table
+	// get_tool_capabilities(self) -> table
 	// Returns the effective tool digging properties.
 	// Returns those of the hand ("") if this item has none associated.
-	static int l_get_tool_digging_properties(lua_State *L)
+	static int l_get_tool_capabilities(lua_State *L)
 	{
 		LuaItemStack *o = checkobject(L, 1);
 		ItemStack &item = o->m_stack;
-		const ToolDiggingProperties &prop =
-			item.getToolDiggingProperties(get_server(L)->idef());
-		push_tool_digging_properties(L, prop);
+		const ToolCapabilities &prop =
+			item.getToolCapabilities(get_server(L)->idef());
+		push_tool_capabilities(L, prop);
 		return 1;
 	}
 
@@ -1386,7 +1455,7 @@ const luaL_reg LuaItemStack::methods[] = {
 	method(LuaItemStack, get_free_space),
 	method(LuaItemStack, is_known),
 	method(LuaItemStack, get_definition),
-	method(LuaItemStack, get_tool_digging_properties),
+	method(LuaItemStack, get_tool_capabilities),
 	method(LuaItemStack, add_wear),
 	method(LuaItemStack, add_item),
 	method(LuaItemStack, item_fits),
@@ -3513,28 +3582,30 @@ static int l_get_inventory(lua_State *L)
 	return 1;
 }
 
-// get_digging_properties(material_properties, tool_digging_properties[, time_from_last_punch])
-static int l_get_digging_properties(lua_State *L)
+// get_dig_params(groups, tool_capabilities[, time_from_last_punch])
+static int l_get_dig_params(lua_State *L)
 {
-	MaterialProperties mp = read_material_properties(L, 1);
-	ToolDiggingProperties tp = read_tool_digging_properties(L, 2);
+	std::map<std::string, int> groups;
+	read_groups(L, 1, groups);
+	ToolCapabilities tp = read_tool_capabilities(L, 2);
 	if(lua_isnoneornil(L, 3))
-		push_digging_properties(L, getDiggingProperties(&mp, &tp));
+		push_dig_params(L, getDigParams(groups, &tp));
 	else
-		push_digging_properties(L, getDiggingProperties(&mp, &tp,
+		push_dig_params(L, getDigParams(groups, &tp,
 					luaL_checknumber(L, 3)));
 	return 1;
 }
 
-// get_hitting_properties(material_properties, tool_digging_properties[, time_from_last_punch])
-static int l_get_hitting_properties(lua_State *L)
+// get_hit_params(groups, tool_capabilities[, time_from_last_punch])
+static int l_get_hit_params(lua_State *L)
 {
-	MaterialProperties mp = read_material_properties(L, 1);
-	ToolDiggingProperties tp = read_tool_digging_properties(L, 2);
+	std::map<std::string, int> groups;
+	read_groups(L, 1, groups);
+	ToolCapabilities tp = read_tool_capabilities(L, 2);
 	if(lua_isnoneornil(L, 3))
-		push_hitting_properties(L, getHittingProperties(&mp, &tp));
+		push_hit_params(L, getHitParams(groups, &tp));
 	else
-		push_hitting_properties(L, getHittingProperties(&mp, &tp,
+		push_hit_params(L, getHitParams(groups, &tp,
 					luaL_checknumber(L, 3)));
 	return 1;
 }
@@ -3580,8 +3651,8 @@ static const struct luaL_Reg minetest_f [] = {
 	{"chat_send_player", l_chat_send_player},
 	{"get_player_privs", l_get_player_privs},
 	{"get_inventory", l_get_inventory},
-	{"get_digging_properties", l_get_digging_properties},
-	{"get_hitting_properties", l_get_hitting_properties},
+	{"get_dig_params", l_get_dig_params},
+	{"get_hit_params", l_get_hit_params},
 	{"get_current_modname", l_get_current_modname},
 	{"get_modpath", l_get_modpath},
 	{"get_worldpath", l_get_worldpath},
diff --git a/src/server.cpp b/src/server.cpp
index 2facb1469..443a2a39b 100644
--- a/src/server.cpp
+++ b/src/server.cpp
@@ -27,7 +27,6 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "main.h"
 #include "constants.h"
 #include "voxel.h"
-#include "materials.h"
 #include "config.h"
 #include "servercommand.h"
 #include "filesys.h"
diff --git a/src/serverobject.cpp b/src/serverobject.cpp
index 2609e3015..4d7f19243 100644
--- a/src/serverobject.cpp
+++ b/src/serverobject.cpp
@@ -20,7 +20,6 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "serverobject.h"
 #include <fstream>
 #include "inventory.h"
-#include "materials.h"
 
 ServerActiveObject::ServerActiveObject(ServerEnvironment *env, v3f pos):
 	ActiveObject(0),
diff --git a/src/serverremoteplayer.cpp b/src/serverremoteplayer.cpp
index 728ffe026..8a81f1d2d 100644
--- a/src/serverremoteplayer.cpp
+++ b/src/serverremoteplayer.cpp
@@ -24,7 +24,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "gamedef.h"
 #include "inventory.h"
 #include "environment.h"
-#include "materials.h"
+#include "tool.h"
 
 ServerRemotePlayer::ServerRemotePlayer(ServerEnvironment *env):
 	Player(env->getGameDef()),
@@ -181,35 +181,32 @@ void ServerRemotePlayer::punch(ServerActiveObject *puncher,
 			return;
 	}
 	
-	// "Material" properties of a player
-	MaterialProperties mp;
-	mp.diggability = DIGGABLE_NORMAL;
-	mp.crackiness = -0.5;
-	mp.cuttability = 0.5;
+	// "Material" groups of the player
+	std::map<std::string, int> groups;
+	groups["snappy"] = 1;
+	groups["choppy"] = 2;
 
 	IItemDefManager *idef = m_env->getGameDef()->idef();
 	ItemStack punchitem = puncher->getWieldedItem();
-	ToolDiggingProperties tp =
-		punchitem.getToolDiggingProperties(idef);
+	ToolCapabilities tp = punchitem.getToolCapabilities(idef);
 
-	HittingProperties hitprop = getHittingProperties(&mp, &tp,
-			time_from_last_punch);
+	HitParams hitparams = getHitParams(groups, &tp, time_from_last_punch);
 	
 	actionstream<<"Player "<<getName()<<" punched by "
-			<<puncher->getDescription()<<", damage "<<hitprop.hp
+			<<puncher->getDescription()<<", damage "<<hitparams.hp
 			<<" HP"<<std::endl;
 	
-	setHP(getHP() - hitprop.hp);
-	punchitem.addWear(hitprop.wear, idef);
+	setHP(getHP() - hitparams.hp);
+	punchitem.addWear(hitparams.wear, idef);
 	puncher->setWieldedItem(punchitem);
 	
-	if(hitprop.hp != 0)
+	if(hitparams.hp != 0)
 	{
 		std::ostringstream os(std::ios::binary);
 		// command (1 = punched)
 		writeU8(os, 1);
 		// damage
-		writeS16(os, hitprop.hp);
+		writeS16(os, hitparams.hp);
 		// create message and add to list
 		ActiveObjectMessage aom(getId(), false, os.str());
 		m_messages_out.push_back(aom);
diff --git a/src/test.cpp b/src/test.cpp
index 4226df544..45851a7e3 100644
--- a/src/test.cpp
+++ b/src/test.cpp
@@ -68,6 +68,7 @@ void define_some_nodes(IWritableItemDefManager *idef, IWritableNodeDefManager *n
 	itemdef.type = ITEM_NODE;
 	itemdef.name = "default:stone";
 	itemdef.description = "Stone";
+	itemdef.groups["cracky"] = 3;
 	itemdef.inventory_image = "[inventorycube"
 		"{default_stone.png"
 		"{default_stone.png"
@@ -77,11 +78,6 @@ void define_some_nodes(IWritableItemDefManager *idef, IWritableNodeDefManager *n
 	for(int i = 0; i < 6; i++)
 		f.tname_tiles[i] = "default_stone.png";
 	f.is_ground_content = true;
-	f.material.diggability = DIGGABLE_NORMAL;
-	f.material.weight = 5.0;
-	f.material.crackiness = 1.0;
-	f.material.crumbliness = -0.1;
-	f.material.cuttability = -0.2;
 	idef->registerItem(itemdef);
 	ndef->set(i, f);
 
@@ -93,6 +89,7 @@ void define_some_nodes(IWritableItemDefManager *idef, IWritableNodeDefManager *n
 	itemdef.type = ITEM_NODE;
 	itemdef.name = "default:dirt_with_grass";
 	itemdef.description = "Dirt with grass";
+	itemdef.groups["crumbly"] = 3;
 	itemdef.inventory_image = "[inventorycube"
 		"{default_grass.png"
 		"{default_dirt.png&default_grass_side.png"
@@ -104,11 +101,6 @@ void define_some_nodes(IWritableItemDefManager *idef, IWritableNodeDefManager *n
 	for(int i = 2; i < 6; i++)
 		f.tname_tiles[i] = "default_dirt.png^default_grass_side.png";
 	f.is_ground_content = true;
-	f.material.diggability = DIGGABLE_NORMAL;
-	f.material.weight = 1.2;
-	f.material.crackiness = 0.0;
-	f.material.crumbliness = 1.2;
-	f.material.cuttability = -0.4;
 	idef->registerItem(itemdef);
 	ndef->set(i, f);
 }
diff --git a/src/tool.cpp b/src/tool.cpp
new file mode 100644
index 000000000..3c61ad6e7
--- /dev/null
+++ b/src/tool.cpp
@@ -0,0 +1,153 @@
+/*
+Minetest-c55
+Copyright (C) 2011 celeron55, Perttu Ahola <celeron55@gmail.com>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#include "tool.h"
+#include "utility.h"
+#include "itemdef.h" // For itemgroup_get()
+#include "log.h"
+
+void ToolCapabilities::serialize(std::ostream &os) const
+{
+	writeU8(os, 0); // version
+	writeF1000(os, full_punch_interval);
+	writeS16(os, max_drop_level);
+	writeU32(os, groupcaps.size());
+	for(std::map<std::string, ToolGroupCap>::const_iterator
+			i = groupcaps.begin(); i != groupcaps.end(); i++){
+		const std::string *name = &i->first;
+		const ToolGroupCap *cap = &i->second;
+		os<<serializeString(*name);
+		writeF1000(os, cap->maxwear);
+		writeF1000(os, cap->maxlevel);
+		writeU32(os, cap->times.size());
+		for(std::map<int, float>::const_iterator
+				i = cap->times.begin(); i != cap->times.end(); i++){
+			writeS16(os, i->first);
+			writeF1000(os, i->second);
+		}
+	}
+}
+
+void ToolCapabilities::deSerialize(std::istream &is)
+{
+	int version = readU8(is);
+	if(version != 0) throw SerializationError(
+			"unsupported ToolCapabilities version");
+	full_punch_interval = readF1000(is);
+	max_drop_level = readS16(is);
+	groupcaps.clear();
+	u32 groupcaps_size = readU32(is);
+	for(u32 i=0; i<groupcaps_size; i++){
+		std::string name = deSerializeString(is);
+		ToolGroupCap cap;
+		cap.maxwear = readF1000(is);
+		cap.maxlevel = readF1000(is);
+		u32 times_size = readU32(is);
+		for(u32 i=0; i<times_size; i++){
+			int level = readS16(is);
+			float time = readF1000(is);
+			cap.times[level] = time;
+		}
+		groupcaps[name] = cap;
+	}
+}
+
+DigParams getDigParams(const std::map<std::string, int> &groups,
+		const ToolCapabilities *tp, float time_from_last_punch)
+{
+	//infostream<<"getDigParams"<<std::endl;
+	/* Check group dig_immediate */
+	switch(itemgroup_get(groups, "dig_immediate")){
+	case 1:
+		//infostream<<"dig_immediate=1"<<std::endl;
+		return DigParams(true, 0.0, 0);
+	case 2:
+		//infostream<<"dig_immediate=2"<<std::endl;
+		return DigParams(true, 1.0, 0);
+	default:
+		break;
+	}
+	
+	// Values to be returned (with a bit of conversion)
+	bool result_diggable = false;
+	float result_time = 0.0;
+	float result_wear = 0.0;
+
+	int level = itemgroup_get(groups, "level");
+	//infostream<<"level="<<level<<std::endl;
+	for(std::map<std::string, ToolGroupCap>::const_iterator
+			i = tp->groupcaps.begin(); i != tp->groupcaps.end(); i++){
+		const std::string &name = i->first;
+		//infostream<<"group="<<name<<std::endl;
+		const ToolGroupCap &cap = i->second;
+		int rating = itemgroup_get(groups, name);
+		float time = 0;
+		bool time_exists = cap.getTime(rating, &time);
+		if(!result_diggable || time < result_time){
+			if(cap.maxlevel > level && time_exists){
+				result_diggable = true;
+				result_time = time;
+				int leveldiff = cap.maxlevel - level;
+				result_wear = cap.maxwear / pow(4.0, (double)leveldiff);
+			}
+		}
+	}
+	//infostream<<"result_diggable="<<result_diggable<<std::endl;
+	//infostream<<"result_time="<<result_time<<std::endl;
+	//infostream<<"result_wear="<<result_wear<<std::endl;
+
+	if(time_from_last_punch < tp->full_punch_interval){
+		float f = time_from_last_punch / tp->full_punch_interval;
+		//infostream<<"f="<<f<<std::endl;
+		result_time /= f;
+		result_wear /= f;
+	}
+
+	u16 wear_i = 65535.*result_wear;
+	return DigParams(result_diggable, result_time, wear_i);
+}
+
+DigParams getDigParams(const std::map<std::string, int> &groups,
+		const ToolCapabilities *tp)
+{
+	return getDigParams(groups, tp, 1000000);
+}
+
+HitParams getHitParams(const std::map<std::string, int> &groups,
+		const ToolCapabilities *tp, float time_from_last_punch)
+{
+	DigParams digprop = getDigParams(groups, tp,
+			time_from_last_punch);
+	
+	// If digging time would be 1 second, 8 half-hearts go in 1 second.
+	s16 hp = 0;
+	if(digprop.diggable)
+		hp = 8.0 / digprop.time;
+	// Wear is the same as for digging a single node
+	s16 wear = (float)digprop.wear;
+
+	return HitParams(hp, wear);
+}
+
+HitParams getHitParams(const std::map<std::string, int> &groups,
+		const ToolCapabilities *tp)
+{
+	return getHitParams(groups, tp, 1000000);
+}
+
diff --git a/src/tool.h b/src/tool.h
new file mode 100644
index 000000000..cc2401a0d
--- /dev/null
+++ b/src/tool.h
@@ -0,0 +1,111 @@
+/*
+Minetest-c55
+Copyright (C) 2010-2011 celeron55, Perttu Ahola <celeron55@gmail.com>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#ifndef TOOL_HEADER
+#define TOOL_HEADER
+
+#include "common_irrlicht.h"
+#include <string>
+#include <iostream>
+#include <map>
+
+struct ToolGroupCap
+{
+	std::map<int, float> times;
+	float maxwear;
+	int maxlevel;
+
+	ToolGroupCap():
+		maxwear(0.05),
+		maxlevel(1)
+	{}
+
+	bool getTime(int rating, float *time) const
+	{
+		std::map<int, float>::const_iterator i = times.find(rating);
+		if(i == times.end()){
+			*time = 0;
+			return false;
+		}
+		*time = i->second;
+		return true;
+	}
+};
+
+struct ToolCapabilities
+{
+	float full_punch_interval;
+	int max_drop_level;
+	std::map<std::string, ToolGroupCap> groupcaps;
+
+	ToolCapabilities(
+			float full_punch_interval_=3.0,
+			int max_drop_level_=1,
+			std::map<std::string, ToolGroupCap> groupcaps_ =
+					std::map<std::string, ToolGroupCap>()
+	):
+		full_punch_interval(full_punch_interval_),
+		max_drop_level(max_drop_level_),
+		groupcaps(groupcaps_)
+	{}
+
+	void serialize(std::ostream &os) const;
+	void deSerialize(std::istream &is);
+};
+
+struct DigParams
+{
+	bool diggable;
+	// Digging time in seconds
+	float time;
+	// Caused wear
+	u16 wear;
+
+	DigParams(bool a_diggable=false, float a_time=0, u16 a_wear=0):
+		diggable(a_diggable),
+		time(a_time),
+		wear(a_wear)
+	{}
+};
+
+DigParams getDigParams(const std::map<std::string, int> &groups,
+		const ToolCapabilities *tp, float time_from_last_punch);
+
+DigParams getDigParams(const std::map<std::string, int> &groups,
+		const ToolCapabilities *tp);
+
+struct HitParams
+{
+	s16 hp;
+	s16 wear;
+
+	HitParams(s16 hp_=0, s16 wear_=0):
+		hp(hp_),
+		wear(wear_)
+	{}
+};
+
+HitParams getHitParams(const std::map<std::string, int> &groups,
+		const ToolCapabilities *tp, float time_from_last_punch);
+
+HitParams getHitParams(const std::map<std::string, int> &groups,
+		const ToolCapabilities *tp);
+
+#endif
+