Add basic minecarts and powered rails

mods/default/nodes.lua

@@ -872,7 +872,7 @@ minetest.register_node("default:rail", {
                 fixed = {-1/2, -1/2, -1/2, 1/2, -1/2+1/16, 1/2},
 	},
 	stack_max = 64,
-	groups = {bendy=2,dig_immediate=2,attached_node=1},
+	groups = {dig_immediate=2,attached_node=1,rail=1,connect_to_raillike=1},
 })
 
 minetest.register_node("default:ladder", {

mods/mcl_minecarts/README.txt

@@ -0,0 +1,31 @@
+mcl_minecarts
+=============
+Based on the mod "boost_carts" by Krock.
+Target: Run smoothly and do not use too much CPU.
+
+TODO:
+- Make minecart smaller
+- Minecraft-like physics
+- Change minecart model and textures
+- Add activator rail
+- Add more rail textures
+- Add loaded minecarts
+
+License of source code:
+-----------------------
+WTFPL
+
+License of media (textures, sounds and models):
+-----------------------------------------------
+CC-0
+
+Authors of media files:
+-----------------------
+kddekadenz:
+  cart_bottom.png
+  cart_side.png
+  cart_top.png
+
+Zeg9:
+  cart.x
+  cart.png

mods/mcl_minecarts/depends.txt

@@ -0,0 +1,2 @@
+default
+mesecons?

mods/mcl_minecarts/functions.lua

@@ -0,0 +1,150 @@
+function mcl_minecarts:get_sign(z)
+	if z == 0 then
+		return 0
+	else
+		return z / math.abs(z)
+	end
+end
+
+function mcl_minecarts:velocity_to_dir(v)
+	if math.abs(v.x) > math.abs(v.z) then
+		return {x=mcl_minecarts:get_sign(v.x), y=mcl_minecarts:get_sign(v.y), z=0}
+	else
+		return {x=0, y=mcl_minecarts:get_sign(v.y), z=mcl_minecarts:get_sign(v.z)}
+	end
+end
+
+function mcl_minecarts:is_rail(pos, railtype)
+	local node = minetest.get_node(pos).name
+	if node == "ignore" then
+		local vm = minetest.get_voxel_manip()
+		local emin, emax = vm:read_from_map(pos, pos)
+		local area = VoxelArea:new{
+			MinEdge = emin,
+			MaxEdge = emax,
+		}
+		local data = vm:get_data()
+		local vi = area:indexp(pos)
+		node = minetest.get_name_from_content_id(data[vi])
+	end
+	if minetest.get_item_group(node, "rail") == 0 then
+		return false
+	end
+	if not railtype then
+		return true
+	end
+	return minetest.get_item_group(node, "connect_to_raillike") == railtype
+end
+
+function mcl_minecarts:check_front_up_down(pos, dir_, check_down, railtype)
+	local dir = vector.new(dir_)
+	local cur = nil
+	
+	-- Front
+	dir.y = 0
+	cur = vector.add(pos, dir)
+	if mcl_minecarts:is_rail(cur, railtype) then
+		return dir
+	end
+	-- Up
+	if check_down then
+		dir.y = 1
+		cur = vector.add(pos, dir)
+		if mcl_minecarts:is_rail(cur, railtype) then
+			return dir
+		end
+	end
+	-- Down
+	dir.y = -1
+	cur = vector.add(pos, dir)
+	if mcl_minecarts:is_rail(cur, railtype) then
+		return dir
+	end
+	return nil
+end
+
+function mcl_minecarts:get_rail_direction(pos_, dir, ctrl, old_switch, railtype)
+	local pos = vector.round(pos_)
+	local cur = nil
+	local left_check, right_check = true, true
+	
+	-- Check left and right
+	local left = {x=0, y=0, z=0}
+	local right = {x=0, y=0, z=0}
+	if dir.z ~= 0 and dir.x == 0 then
+		left.x = -dir.z
+		right.x = dir.z
+	elseif dir.x ~= 0 and dir.z == 0 then
+		left.z = dir.x
+		right.z = -dir.x
+	end
+	
+	if ctrl then
+		if old_switch == 1 then
+			left_check = false
+		elseif old_switch == 2 then
+			right_check = false
+		end
+		if ctrl.left and left_check then
+			cur = mcl_minecarts:check_front_up_down(pos, left, false, railtype)
+			if cur then
+				return cur, 1
+			end
+			left_check = false
+		end
+		if ctrl.right and right_check then
+			cur = mcl_minecarts:check_front_up_down(pos, right, false, railtype)
+			if cur then
+				return cur, 2
+			end
+			right_check = true
+		end
+	end
+	
+	-- Normal
+	cur = mcl_minecarts:check_front_up_down(pos, dir, true, railtype)
+	if cur then
+		return cur
+	end
+	
+	-- Left, if not already checked
+	if left_check then
+		cur = mcl_minecarts:check_front_up_down(pos, left, false, railtype)
+		if cur then
+			return cur
+		end
+	end
+	
+	-- Right, if not already checked
+	if right_check then
+		cur = mcl_minecarts:check_front_up_down(pos, right, false, railtype)
+		if cur then
+			return cur
+		end
+	end
+	
+	-- Backwards
+	if not old_switch then
+		cur = mcl_minecarts:check_front_up_down(pos, {
+				x = -dir.x,
+				y = dir.y,
+				z = -dir.z
+			}, true, railtype)
+		if cur then
+			return cur
+		end
+	end
+	
+	return {x=0, y=0, z=0}
+end
+
+function mcl_minecarts:boost_rail(pos, amount)
+	minetest.get_meta(pos):set_string("cart_acceleration", tostring(amount))
+	for _,obj_ in ipairs(minetest.get_objects_inside_radius(pos, 0.5)) do
+		if not obj_:is_player() and
+				obj_:get_luaentity() and
+				obj_:get_luaentity().name == "mcl_minecarts:minecart" then
+			obj_:get_luaentity():on_punch()
+		end
+	end
+end

mods/mcl_minecarts/init.lua

@@ -0,0 +1,290 @@
+mcl_minecarts = {}
+mcl_minecarts.modpath = minetest.get_modpath("mcl_minecarts")
+mcl_minecarts.speed_max = 10
+
+function vector.floor(v)
+	return {
+		x = math.floor(v.x),
+		y = math.floor(v.y),
+		z = math.floor(v.z)
+	}
+end
+
+dofile(mcl_minecarts.modpath.."/functions.lua")
+dofile(mcl_minecarts.modpath.."/rails.lua")
+
+mcl_minecarts.cart = {
+	physical = false,
+	collisionbox = {-0.5, -0.5, -0.5, 0.5, 0.5, 0.5},
+	visual = "mesh",
+	mesh = "cart.x",
+	visual_size = {x=1, y=1},
+	textures = {"cart.png"},
+	
+	driver = nil,
+	punched = false, -- used to re-send velocity and position
+	velocity = {x=0, y=0, z=0}, -- only used on punch
+	old_dir = {x=0, y=0, z=0},
+	old_pos = nil,
+	old_switch = 0,
+	railtype = nil,
+}
+
+function mcl_minecarts.cart:on_rightclick(clicker)
+	if not clicker or not clicker:is_player() then
+		return
+	end
+	local player_name = clicker:get_player_name()
+	if self.driver and player_name == self.driver then
+		self.driver = nil
+		clicker:set_detach()
+	elseif not self.driver then
+		self.driver = player_name
+		default.player_attached[player_name] = true
+		clicker:set_attach(self.object, "", {x=0, y=3, z=0}, {x=0, y=0, z=0})
+	end
+end
+
+function mcl_minecarts.cart:on_activate(staticdata, dtime_s)
+	self.object:set_armor_groups({immortal=1})
+end
+
+function mcl_minecarts.cart:on_punch(puncher, time_from_last_punch, tool_capabilities, direction)
+	local pos = self.object:getpos()
+	if not self.railtype then
+		local node = minetest.get_node(vector.floor(pos)).name
+		self.railtype = minetest.get_item_group(node, "connect_to_raillike")
+	end
+	
+	if not puncher or not puncher:is_player() then
+		local cart_dir = mcl_minecarts:get_rail_direction(pos, {x=1, y=0, z=0}, nil, nil, self.railtype)
+		if vector.equals(cart_dir, {x=0, y=0, z=0}) then
+			return
+		end
+		self.velocity = vector.multiply(cart_dir, 3)
+		self.old_pos = nil
+		self.punched = true
+		return
+	end
+
+	if puncher:get_player_control().sneak then
+		if self.driver then
+			if self.old_pos then
+				self.object:setpos(self.old_pos)
+			end
+			default.player_attached[self.driver] = nil
+			local player = minetest.get_player_by_name(self.driver)
+			if player then
+				player:set_detach()
+			end
+		end
+		
+		self.object:remove()
+		puncher:get_inventory():add_item("main", "mcl_minecarts:minecart")
+		return
+	end
+	
+	local vel = self.object:getvelocity()
+	if puncher:get_player_name() == self.driver then
+		if math.abs(vel.x + vel.z) > 7 then
+			return
+		end
+	end
+	
+	local punch_dir = mcl_minecarts:velocity_to_dir(puncher:get_look_dir())
+	punch_dir.y = 0
+	local cart_dir = mcl_minecarts:get_rail_direction(pos, punch_dir, nil, nil, self.railtype)
+	if vector.equals(cart_dir, {x=0, y=0, z=0}) then
+		return
+	end
+	
+	time_from_last_punch = math.min(time_from_last_punch, tool_capabilities.full_punch_interval)
+	local f = 3 * (time_from_last_punch / tool_capabilities.full_punch_interval)
+	
+	self.velocity = vector.multiply(cart_dir, f)
+	self.old_pos = nil
+	self.punched = true
+end
+
+function mcl_minecarts.cart:on_step(dtime)
+	local vel = self.object:getvelocity()
+	local update = {}
+	if self.punched then
+		vel = vector.add(vel, self.velocity)
+		self.object:setvelocity(vel)
+		self.old_dir.y = 0
+	elseif vector.equals(vel, {x=0, y=0, z=0}) then
+		return
+	end
+	
+	local dir, last_switch = nil, nil
+	local pos = self.object:getpos()
+	if self.old_pos and not self.punched then
+		local flo_pos = vector.floor(pos)
+		local flo_old = vector.floor(self.old_pos)
+		if vector.equals(flo_pos, flo_old) then
+			return
+		end
+	end
+	
+	local ctrl, player = nil, nil
+	if self.driver then
+		player = minetest.get_player_by_name(self.driver)
+		if player then
+			ctrl = player:get_player_control()
+		end
+	end
+	if self.old_pos then
+		local diff = vector.subtract(self.old_pos, pos)
+		for _,v in ipairs({"x","y","z"}) do
+			if math.abs(diff[v]) > 1.1 then
+				local expected_pos = vector.add(self.old_pos, self.old_dir)
+				dir, last_switch = mcl_minecarts:get_rail_direction(pos, self.old_dir, ctrl, self.old_switch, self.railtype)
+				if vector.equals(dir, {x=0, y=0, z=0}) then
+					dir = false
+					pos = vector.new(expected_pos)
+					update.pos = true
+				end
+				break
+			end
+		end
+	end
+	
+	if vel.y == 0 then
+		for _,v in ipairs({"x", "z"}) do
+			if vel[v] ~= 0 and math.abs(vel[v]) < 0.9 then
+				vel[v] = 0
+				update.vel = true
+			end
+		end
+	end
+	
+	local cart_dir = mcl_minecarts:velocity_to_dir(vel)
+	local max_vel = mcl_minecarts.speed_max
+	if not dir then
+		dir, last_switch = mcl_minecarts:get_rail_direction(pos, cart_dir, ctrl, self.old_switch, self.railtype)
+	end
+	
+	local new_acc = {x=0, y=0, z=0}
+	if vector.equals(dir, {x=0, y=0, z=0}) then
+		vel = {x=0, y=0, z=0}
+		update.vel = true
+	else
+		-- If the direction changed
+		if dir.x ~= 0 and self.old_dir.z ~= 0 then
+			vel.x = dir.x * math.abs(vel.z)
+			vel.z = 0
+			pos.z = math.floor(pos.z + 0.5)
+			update.pos = true
+		end
+		if dir.z ~= 0 and self.old_dir.x ~= 0 then
+			vel.z = dir.z * math.abs(vel.x)
+			vel.x = 0
+			pos.x = math.floor(pos.x + 0.5)
+			update.pos = true
+		end
+		-- Up, down?
+		if dir.y ~= self.old_dir.y then
+			vel.y = dir.y * math.abs(vel.x + vel.z)
+			pos = vector.round(pos)
+			update.pos = true
+		end
+		
+		-- Slow down or speed up..
+		local acc = dir.y * -1.8
+		
+		local speed_mod = tonumber(minetest.get_meta(pos):get_string("cart_acceleration"))
+		if speed_mod and speed_mod ~= 0 then
+			if speed_mod > 0 then
+				for _,v in ipairs({"x","y","z"}) do
+					if math.abs(vel[v]) >= max_vel then
+						speed_mod = 0
+						break
+					end
+				end
+			end
+			acc = acc + (speed_mod * 8)
+		else
+			acc = acc - 0.4
+			-- Handbrake
+			if ctrl and ctrl.down and math.abs(vel.x + vel.z) > 1.2 then
+				acc = acc - 1.2
+			end
+		end
+		
+		new_acc = vector.multiply(dir, acc)
+	end
+	
+	self.object:setacceleration(new_acc)
+	self.old_pos = vector.new(pos)
+	self.old_dir = vector.new(dir)
+	self.old_switch = last_switch
+	
+	-- Limits
+	for _,v in ipairs({"x","y","z"}) do
+		if math.abs(vel[v]) > max_vel then
+			vel[v] = mcl_minecarts:get_sign(vel[v]) * max_vel
+			update.vel = true
+		end
+	end
+
+	if self.punched then
+		self.punched = false
+	end
+	
+	if not (update.vel or update.pos) then
+		return
+	end
+	
+	local yaw = 0
+	if dir.x < 0 then
+		yaw = 0.5
+	elseif dir.x > 0 then
+		yaw = 1.5
+	elseif dir.z < 0 then
+		yaw = 1
+	end
+	self.object:setyaw(yaw * math.pi)
+	
+	local anim = {x=0, y=0}
+	if dir.y == -1 then
+		anim = {x=1, y=1}
+	elseif dir.y == 1 then
+		anim = {x=2, y=2}
+	end
+	self.object:set_animation(anim, 1, 0)
+	
+	self.object:setvelocity(vel)
+	if update.pos then
+		self.object:setpos(pos)
+	end
+	update = nil
+end
+
+minetest.register_entity("mcl_minecarts:minecart", mcl_minecarts.cart)
+minetest.register_craftitem("mcl_minecarts:minecart", {
+	description = "Minecart",
+	inventory_image = minetest.inventorycube("cart_top.png", "cart_side.png", "cart_side.png"),
+	wield_image = "cart_side.png",
+	on_place = function(itemstack, placer, pointed_thing)
+		if not pointed_thing.type == "node" then
+			return
+		end
+		if mcl_minecarts:is_rail(pointed_thing.under) then
+			minetest.add_entity(pointed_thing.under, "mcl_minecarts:minecart")
+		elseif mcl_minecarts:is_rail(pointed_thing.above) then
+			minetest.add_entity(pointed_thing.above, "mcl_minecarts:minecart")
+		else return end
+		
+		itemstack:take_item()
+		return itemstack
+	end,
+})
+
+minetest.register_craft({
+	output = "mcl_minecarts:minecart",
+	recipe = {
+		{"default:steel_ingot", "", "default:steel_ingot"},
+		{"default:steel_ingot", "default:steel_ingot", "default:steel_ingot"},
+	},
+})

mods/mcl_minecarts/mod.conf

@@ -0,0 +1 @@
+name = mcl_minecarts

mods/mcl_minecarts/models/cart.x

@@ -0,0 +1,339 @@
+xof 0303txt 0032
+
+Frame Root {
+  FrameTransformMatrix {
+     1.000000, 0.000000, 0.000000, 0.000000,
+     0.000000, 0.000000, 1.000000, 0.000000,
+     0.000000, 1.000000,-0.000000, 0.000000,
+     0.000000, 0.000000, 0.000000, 1.000000;;
+  }
+  Frame Cube {
+    FrameTransformMatrix {
+       5.000000, 0.000000,-0.000000, 0.000000,
+      -0.000000, 3.535534, 3.535534, 0.000000,
+       0.000000,-3.535534, 3.535534, 0.000000,
+       0.000000,-3.000000, 3.000000, 1.000000;;
+    }
+    Mesh { //Cube_001 Mesh
+      72;
+      -1.000000; 1.000000;-1.000000;,
+      -1.000000;-1.000000;-1.000000;,
+       1.000000;-1.000000;-1.000000;,
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+      -0.833334;-0.833333; 1.000000;,
+      -1.000000;-1.000000;-1.000000;,
+      -1.000000;-1.000000; 1.000000;,
+       0.999999;-1.000001; 1.000000;,
+       1.000000;-1.000000;-1.000000;,
+       0.999999;-1.000001; 1.000000;,
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+      -0.833333; 0.833333; 1.000000;,
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+      -0.833333; 0.833333; 1.000000;,
+      -1.000000; 0.833333; 1.000000;,
+      -1.000000; 1.000000; 1.000000;,
+      -0.833333; 1.000000; 1.000000;,
+      -0.833334;-0.833333; 1.000000;,
+      -1.000000;-0.833333; 1.000000;,
+      -1.000000; 0.833333; 1.000000;,
+      -0.833333; 0.833333; 1.000000;,
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+      -0.833334;-0.833333;-0.800000;,
+      -0.833333; 0.833333;-0.800000;,
+       0.833334; 0.833333;-0.800000;,
+      -0.833333; 0.833333;-0.800000;,
+      -0.833334;-0.833333;-0.800000;,
+      -0.833334;-0.833333; 1.000000;,
+      -0.833333; 0.833333; 1.000000;,
+      -0.833334;-0.833333;-0.800000;,
+       0.833333;-0.833334;-0.800000;,
+       0.833333;-0.833334; 1.000000;,
+      -0.833334;-0.833333; 1.000000;,
+       0.833333;-0.833334;-0.800000;,
+       0.833334; 0.833333;-0.800000;,
+       0.833334; 0.833333; 1.000000;,
+       0.833333;-0.833334; 1.000000;,
+      -1.000000; 1.000000;-1.000000;,
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+      -1.000000; 1.000000; 1.000000;,
+      -1.000000; 1.000000;-1.000000;,
+       1.000000; 1.000000;-1.000000;,
+       1.000000; 0.999999; 1.000000;,
+       1.000000;-1.000000;-1.000000;,
+       0.999999;-1.000001; 1.000000;,
+       1.000000; 0.999999; 1.000000;,
+       1.000000; 1.000000;-1.000000;;
+      18;
+      4;0;1;2;3;,
+      4;4;5;6;7;,
+      4;8;9;10;11;,
+      4;12;13;14;15;,
+      4;16;17;18;19;,
+      4;20;21;22;23;,
+      4;24;25;26;27;,
+      4;28;29;30;31;,
+      4;32;33;34;35;,
+      4;36;37;38;39;,
+      4;40;41;42;43;,
+      4;44;45;46;47;,
+      4;48;49;50;51;,
+      4;52;53;54;55;,
+      4;56;57;58;59;,
+      4;60;61;62;63;,
+      4;64;65;66;67;,
+      4;68;69;70;71;;
+      MeshNormals { //Cube_001 Normals
+        72;
+         0.000000; 0.000000;-1.000000;,
+         0.000000; 0.000000;-1.000000;,
+         0.000000; 0.000000;-1.000000;,
+         0.000000; 0.000000;-1.000000;,
+         0.000000;-0.000000; 1.000000;,
+         0.000000;-0.000000; 1.000000;,
+         0.000000;-0.000000; 1.000000;,
+         0.000000;-0.000000; 1.000000;,
+        -0.000000;-1.000000;-0.000000;,
+        -0.000000;-1.000000;-0.000000;,
+        -0.000000;-1.000000;-0.000000;,
+        -0.000000;-1.000000;-0.000000;,
+         0.000000;-0.000000; 1.000000;,
+         0.000000;-0.000000; 1.000000;,
+         0.000000;-0.000000; 1.000000;,
+         0.000000;-0.000000; 1.000000;,
+         0.000000;-0.000000; 1.000000;,
+         0.000000;-0.000000; 1.000000;,
+         0.000000;-0.000000; 1.000000;,
+         0.000000;-0.000000; 1.000000;,
+         0.000000;-0.000000; 1.000000;,
+         0.000000;-0.000000; 1.000000;,
+         0.000000;-0.000000; 1.000000;,
+         0.000000;-0.000000; 1.000000;,
+         0.000000;-0.000000; 1.000000;,
+         0.000000;-0.000000; 1.000000;,
+         0.000000;-0.000000; 1.000000;,
+         0.000000;-0.000000; 1.000000;,
+         0.000000;-0.000000; 1.000000;,
+         0.000000;-0.000000; 1.000000;,
+         0.000000;-0.000000; 1.000000;,
+         0.000000;-0.000000; 1.000000;,
+        -0.000000;-1.000000; 0.000000;,
+        -0.000000;-1.000000; 0.000000;,
+        -0.000000;-1.000000; 0.000000;,
+        -0.000000;-1.000000; 0.000000;,
+         0.000000;-0.000000; 1.000000;,
+         0.000000;-0.000000; 1.000000;,
+         0.000000;-0.000000; 1.000000;,
+         0.000000;-0.000000; 1.000000;,
+         0.000000;-0.000000; 1.000000;,
+         0.000000;-0.000000; 1.000000;,
+         0.000000;-0.000000; 1.000000;,
+         0.000000;-0.000000; 1.000000;,
+         0.000000;-0.000000; 1.000000;,
+         0.000000;-0.000000; 1.000000;,
+         0.000000;-0.000000; 1.000000;,
+         0.000000;-0.000000; 1.000000;,
+         1.000000;-0.000000; 0.000000;,
+         1.000000;-0.000000; 0.000000;,
+         1.000000;-0.000000; 0.000000;,
+         1.000000;-0.000000; 0.000000;,
+         0.000000; 1.000000; 0.000000;,
+         0.000000; 1.000000; 0.000000;,
+         0.000000; 1.000000; 0.000000;,
+         0.000000; 1.000000; 0.000000;,
+        -1.000000; 0.000000; 0.000000;,
+        -1.000000; 0.000000; 0.000000;,
+        -1.000000; 0.000000; 0.000000;,
+        -1.000000; 0.000000; 0.000000;,
+        -1.000000; 0.000000;-0.000000;,
+        -1.000000; 0.000000;-0.000000;,
+        -1.000000; 0.000000;-0.000000;,
+        -1.000000; 0.000000;-0.000000;,
+         0.000000; 1.000000; 0.000000;,
+         0.000000; 1.000000; 0.000000;,
+         0.000000; 1.000000; 0.000000;,
+         0.000000; 1.000000; 0.000000;,
+         1.000000;-0.000000; 0.000000;,
+         1.000000;-0.000000; 0.000000;,
+         1.000000;-0.000000; 0.000000;,
+         1.000000;-0.000000; 0.000000;;
+        18;
+        4;0;1;2;3;,
+        4;4;5;6;7;,
+        4;8;9;10;11;,
+        4;12;13;14;15;,
+        4;16;17;18;19;,
+        4;20;21;22;23;,
+        4;24;25;26;27;,
+        4;28;29;30;31;,
+        4;32;33;34;35;,
+        4;36;37;38;39;,
+        4;40;41;42;43;,
+        4;44;45;46;47;,
+        4;48;49;50;51;,
+        4;52;53;54;55;,
+        4;56;57;58;59;,
+        4;60;61;62;63;,
+        4;64;65;66;67;,
+        4;68;69;70;71;;
+      } //End of Cube_001 Normals
+      MeshMaterialList { //Cube_001 Material List
+        1;
+        18;
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0;;
+        Material Material {
+           0.640000; 0.640000; 0.640000; 1.000000;;
+           96.078431;
+           0.500000; 0.500000; 0.500000;;
+           0.000000; 0.000000; 0.000000;;
+          TextureFilename {"cart.png";}
+        }
+      } //End of Cube_001 Material List
+      MeshTextureCoords { //Cube_001 UV Coordinates
+        72;
+         0.000000; 0.500000;,
+         0.500000; 0.500000;,
+         0.500000; 1.000000;,
+         0.000000; 1.000000;,
+         0.031250; 0.500000;,
+        -0.000000; 0.500000;,
+        -0.000000; 0.468750;,
+         0.031250; 0.468750;,
+         0.500000; 0.500000;,
+         0.500000; 0.000000;,
+         1.000000; 0.000000;,
+         1.000000; 0.500000;,
+         0.468750; 0.468750;,
+         0.500000; 0.468750;,
+         0.500000; 0.500000;,
+         0.468750; 0.500000;,
+         0.031250; 0.468750;,
+         0.468750; 0.468750;,
+         0.468750; 0.500000;,
+         0.031250; 0.500000;,
+         0.468750; 0.000000;,
+         0.500000; 0.000000;,
+         0.500000; 0.031250;,
+         0.468750; 0.031250;,
+         0.468750; 0.031250;,
+         0.500000; 0.031250;,
+         0.500000; 0.468750;,
+         0.468750; 0.468750;,
+         0.468750; 0.031250;,
+         0.031250; 0.031250;,
+         0.031250; 0.000000;,
+         0.468750; 0.000000;,
+         1.000000; 0.500000;,
+         0.500000; 0.500000;,
+         0.500000; 0.000000;,
+         1.000000; 0.000000;,
+         0.031250; 0.031250;,
+         0.000000; 0.031250;,
+         0.000000; 0.000000;,
+         0.031250; 0.000000;,
+         0.031250; 0.468750;,
+        -0.000000; 0.468750;,
+         0.000000; 0.031250;,
+         0.031250; 0.031250;,
+         0.000000; 0.500000;,
+         0.500000; 0.500000;,
+         0.500000; 1.000000;,
+         0.000000; 1.000000;,
+         1.000000; 0.500000;,
+         0.500000; 0.500000;,
+         0.500000; 0.000000;,
+         1.000000; 0.000000;,
+         1.000000; 0.500000;,
+         0.500000; 0.500000;,
+         0.500000; 0.000000;,
+         1.000000; 0.000000;,
+         1.000000; 0.500000;,
+         0.500000; 0.500000;,
+         0.500000; 0.000000;,
+         1.000000; 0.000000;,
+         0.500000; 0.500000;,
+         0.500000; 0.000000;,
+         1.000000; 0.000000;,
+         1.000000; 0.500000;,
+         1.000000; 0.000000;,
+         1.000000; 0.500000;,
+         0.500000; 0.500000;,
+         0.500000; 0.000000;,
+         0.500000; 0.500000;,
+         0.500000; 0.000000;,
+         1.000000; 0.000000;,
+         1.000000; 0.500000;;
+      } //End of Cube_001 UV Coordinates
+    } //End of Cube_001 Mesh
+  } //End of Cube
+} //End of Root Frame
+AnimationSet {
+  Animation {
+    {Cube}
+    AnimationKey { //Position
+      2;
+      4;
+      0;3;     0.000000, 0.000000, 0.000000;;,
+      1;3;     0.000000, 3.000000, 3.000000;;,
+      2;3;     0.000000,-3.000000, 3.000000;;,
+      3;3;     0.000000,-3.000000, 3.000000;;;
+    }
+    AnimationKey { //Rotation
+      0;
+      4;
+      0;4;    -1.000000, 0.000000, 0.000000, 0.000000;;,
+      1;4;    -0.923880,-0.382683,-0.000000, 0.000000;;,
+      2;4;    -0.923880, 0.382683, 0.000000, 0.000000;;,
+      3;4;    -0.923880, 0.382683, 0.000000, 0.000000;;;
+    }
+    AnimationKey { //Scale
+      1;
+      4;
+      0;3;     5.000000, 5.000000, 5.000000;;,
+      1;3;     5.000000, 5.000000, 5.000000;;,
+      2;3;     5.000000, 5.000000, 5.000000;;,
+      3;3;     5.000000, 5.000000, 5.000000;;;
+    }
+  }
+} //End of AnimationSet

mods/mcl_minecarts/rails.lua

@@ -0,0 +1,46 @@
+-- Speed up
+
+minetest.register_node("mcl_minecarts:golden_rail", {
+	description = "Powered Rail",
+	drawtype = "raillike",
+	tiles = {"carts_rail_pwr.png", "carts_rail_curved_pwr.png", "carts_rail_t_junction_pwr.png", "carts_rail_crossing_pwr.png"},
+	inventory_image = "carts_rail_pwr.png",
+	wield_image = "carts_rail_pwr.png",
+	paramtype = "light",
+	is_ground_content = true,
+	walkable = false,
+	selection_box = {
+		type = "fixed",
+		-- but how to specify the dimensions for curved and sideways rails?
+		fixed = {-1/2, -1/2, -1/2, 1/2, -1/2+1/16, 1/2},
+	},
+	groups = {dig_immediate = 2, attached_node = 1, rail = 1, connect_to_raillike = 1},
+	
+	after_place_node = function(pos, placer, itemstack)
+		if not mesecon then
+			minetest.get_meta(pos):set_string("cart_acceleration", "0.5")
+		end
+	end,
+	
+	mesecons = {
+		effector = {
+			action_on = function(pos, node)
+				mcl_minecarts:boost_rail(pos, 0.5)
+			end,
+			
+			action_off = function(pos, node)
+				minetest.get_meta(pos):set_string("cart_acceleration", "0")
+			end,
+		},
+	},
+})
+
+minetest.register_craft({
+	output = "mcl_minecarts:golden_rail 6",
+	recipe = {
+		{"default:gold_ingot", "", "default:gold_ingot"},
+		{"default:gold_ingot", "default:stick", "default:gold_ingot"},
+		{"default:gold_ingot", "mesecons:redstone_dust", "default:gold_ingot"},
+	}
+})
+