Add the mod

.gitignore

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+*~

ruby/depends.txt

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+default

ruby/init.lua

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+minetest.register_craftitem("ruby:ruby", {
+	description = "Ruby",
+	inventory_image = "ruby_ruby.png",
+})
+
+minetest.register_craftitem("ruby:anticrystal", {
+	description = "Anticrystal",
+	inventory_image = "ruby_anticrystal.png",
+})
+
+minetest.register_node("ruby:stone_with_ruby", {
+	description = "Rubies in Stone",
+	tiles = {"default_stone.png^ruby_mineral_ruby.png"},
+	is_ground_content = true,
+	groups = {cracky=1},
+	drop = "ruby:ruby",
+	sounds = default.node_sound_stone_defaults(),
+})
+
+minetest.register_node("ruby:rubyblock", {
+	description = "Ruby Block",
+	tiles = {"ruby_ruby_block.png"},
+	-- light_source = LIGHT_MAX, --TODO make Ruby lamp
+	is_ground_content = true,
+	groups = {cracky=1,level=2},
+	sounds = default.node_sound_stone_defaults(),
+})
+
+minetest.register_node("ruby:anticrystalblock", {
+	description = "Anticrystal Block",
+	tiles = {"ruby_anticrystal_block.png"},
+	is_ground_content = true,
+	groups = {anti=1,level=2},
+	sounds = default.node_sound_stone_defaults(),
+})
+
+minetest.register_node("ruby:antigravity",{
+	description = "Antigravity",
+	tiles = {"ruby_antigravity.png"},
+	is_ground_content = true,
+	groups = {anti=1,level=2},
+	sounds = default.node_sound_stone_defaults(),
+	on_construct = function(pos)
+	end,
+})
+
+minetest.register_abm({
+	nodenames={"ruby:antigravity"},
+	interval = 1,
+	chance = 1,
+	action = function(pos, node)
+		pos.y = pos.y+.5
+		local objs = minetest.env:get_objects_inside_radius(pos, .5)
+		pos.y = pos.y -.5
+		for _, obj in pairs(objs) do
+			if obj:is_player() then
+				obj:set_physics_override(nil,nil,-1)
+				minetest.after(5.0,function()
+					obj:set_physics_override(nil,nil,1)
+				end)
+			end
+		end
+	end,
+})
+minetest.register_abm({
+	nodenames={"ruby:antigravity"},
+	interval = 5,
+	chance = 1,
+	action = function(pos, node)
+		minpos = {}
+		minpos.x = pos.x - .5
+		minpos.y = pos.y
+		minpos.z = pos.z - .5
+		maxpos = {}
+		maxpos.x = pos.x + .5
+		maxpos.y = pos.y
+		maxpos.z = pos.z + .5
+		minetest.add_particlespawner(100,5,
+			minpos, maxpos,
+			{x=0,y=20,z=0}, {x=0,y=20,z=0},
+			{x=0,y=0,z=0}, {x=0,y=0,z=0},
+			1, 1,
+			.1, 1,
+			false, "ruby_particle_mese.png")
+	end,
+})
+
+minetest.register_abm({
+	nodenames={"default:mese"},
+	neighbors={"ruby:rubyblock"},
+	interval = 5.0,
+	chance = 5,
+	action = function(pos,node,active_object_count,active_object_count_wider)
+		minetest.add_particlespawner(10, 1,
+			pos, pos,
+			{x=-10,y=-10,z=-10}, {x=10,y=10,z=10},
+			{x=-100,y=-100,z=-100}, {x=100,y=100,z=10},
+			1, 1,
+			.1,10,
+			false, "ruby_particle_ruby.png")
+		minetest.add_particlespawner(100, 1,
+			pos, pos,
+			{x=-10,y=-10,z=-10}, {x=10,y=10,z=10},
+			{x=-100,y=-100,z=-100}, {x=100,y=100,z=100},
+			1, 1,
+			.1,10,
+			false, "ruby_particle_mese.png")
+		local r = 2 -- Radius for destroying
+		for x = pos.x-r, pos.x+r, 1 do
+			for y = pos.y-r, pos.y+r, 1 do
+				for z = pos.z-r, pos.z+r, 1 do
+					local cpos = {x=x,y=y,z=z}
+					if minetest.env:get_node(cpos).name == "ruby:rubyblock" then
+						local e = minetest.env:add_item(cpos,{name="ruby:anticrystal"})
+						e:setvelocity({x=0,y=10,z=0})
+					end
+					-- The commented part allows to randomly destroy nodes around
+					if --[[math.random(0,1) == 1
+					or]] minetest.env:get_node(cpos).name == "ruby:rubyblock"
+					or minetest.env:get_node(cpos).name == "default:mese" then
+						minetest.env:remove_node(cpos)
+					end
+				end
+			end
+		end
+	end,
+})
+
+minetest.register_ore({
+	ore_type       = "scatter",
+	ore            = "ruby:stone_with_ruby",
+	wherein        = "default:stone",
+	clust_scarcity = 18*18*18,
+	clust_num_ores = 4,
+	clust_size     = 3,
+	height_min     = -5119,
+	height_max     = -1024,
+})
+
+
+minetest.register_ore({
+	ore_type       = "scatter",
+	ore            = "ruby:stone_with_ruby",
+	wherein        = "default:stone",
+	clust_scarcity = 12*12*12,
+	clust_num_ores = 4,
+	clust_size     = 3,
+	height_min     = -31000,
+	height_max     = -5120,
+})
+
+minetest.register_craft({
+	output = 'ruby:rubyblock',
+	recipe = {
+		{'ruby:ruby', 'ruby:ruby', 'ruby:ruby'},
+		{'ruby:ruby', 'ruby:ruby', 'ruby:ruby'},
+		{'ruby:ruby', 'ruby:ruby', 'ruby:ruby'},
+	}
+})
+minetest.register_craft({
+	output = 'ruby:anticrystalblock',
+	recipe = {
+		{'ruby:anticrystal', 'ruby:anticrystal', 'ruby:anticrystal'},
+		{'ruby:anticrystal', 'ruby:anticrystal', 'ruby:anticrystal'},
+		{'ruby:anticrystal', 'ruby:anticrystal', 'ruby:anticrystal'},
+	}
+})
+minetest.register_craft({
+	output = 'ruby:antigravity',
+	recipe = {
+		{'default:mese_crystal','default:mese_crystal','default:mese_crystal'},
+		{'default:mese_crystal','ruby:anticrystalblock','default:mese_crystal'},
+		{'default:mese_crystal','default:mese_crystal','default:mese_crystal'},
+	}
+})
+
+local APS = 0.25 -- Anticrystal Pickaxe Speed
+local APU = 100 -- Anticrystal Pickaxe Uses
+
+minetest.register_tool("ruby:pick_anticrystal", {
+	description = "Anticrystal Pickaxe",
+	inventory_image = "ruby_tool_anticrystalpick.png",
+	tool_capabilities = {
+		full_punch_interval = 0.7,
+		max_drop_level=3,
+		groupcaps={
+			cracky = {times={[1]=APS, [2]=APS, [3]=APS}, uses=APU, maxlevel=3},
+			choppy={times={[1]=APS, [2]=APS, [3]=APS}, uses=APU, maxlevel=3},
+			crumbly = {times={[1]=APS, [2]=APS, [3]=APS}, uses=APU, maxlevel=3},
+			snappy={times={[1]=APS, [2]=APS, [3]=APS}, uses=APU, maxlevel=3},
+			anti={times={[1]=APS*5, [2]=APS*5, [3]=APS*5}, uses=APU, maxlevel=3},
+		},
+		damage_groups = {fleshy=7},
+	},
+})
+
+minetest.register_craft({
+	output = 'ruby:pick_anticrystal',
+	recipe = {
+		{'ruby:anticrystal', 'ruby:anticrystal', 'ruby:anticrystal'},
+		{'', 'default:stick', ''},
+		{'', 'default:stick', ''},
+	}
+})
+
+minetest.register_alias("default:stone_with_ruby","ruby:stone_with_ruby")
+minetest.register_alias("default:ruby","ruby:ruby")