Something like bike

1 files changed, 243 insertions, 0 deletions

diff --git a/init.lua b/init.lua
new file mode 100644
index 0000000..3747107
--- /dev/null
+++ b/init.lua
@@ -0,0 +1,243 @@
+--
+-- Helper functions
+--
+
+local function is_water(pos)
+	local nn = minetest.get_node(pos).name
+	return minetest.get_item_group(nn, "liquid") ~= 0
+end
+
+
+local function get_sign(i)
+	if i == 0 then
+		return 0
+	else
+		return i / math.abs(i)
+	end
+end
+
+
+local function get_velocity(v, yaw, y)
+	local x = -math.sin(yaw) * v
+	local z =  math.cos(yaw) * v
+	return {x = x, y = y, z = z}
+end
+
+
+local function get_v(v)
+	return math.sqrt(v.x ^ 2 + v.z ^ 2)
+end
+
+--
+-- bike entity
+--
+
+local bike = {
+	physical = true,
+	-- Warning: Do not change the position of the collisionbox top surface,
+	-- lowering it causes the bike to fall through the world if underwater
+	collisionbox = {-0.5, -0.35, -0.5, 0.5, 0.3, 0.5},
+	visual = "mesh",
+	mesh = "bike_bike.obj",
+	textures = {"default_wood.png"},
+	stepheight = 0.6,
+
+	driver = nil,
+	v = 0,
+	last_v = 0,
+	removed = false
+}
+
+
+function bike.on_rightclick(self, clicker)
+	if not clicker or not clicker:is_player() then
+		return
+	end
+	local name = clicker:get_player_name()
+	if self.driver and clicker == self.driver then
+		self.object:setvelocity({x = 0, y = 0, z = 0})
+		self.v = 0
+
+		self.driver = nil
+		clicker:set_detach()
+		default.player_attached[name] = false
+		default.player_set_animation(clicker, "stand" , 30)
+		local pos = clicker:getpos()
+		pos = {x = pos.x, y = pos.y + 0.2, z = pos.z}
+		minetest.after(0.1, function()
+			clicker:setpos(pos)
+		end)
+	elseif not self.driver then
+		local attach = clicker:get_attach()
+		if attach and attach:get_luaentity() then
+			local luaentity = attach:get_luaentity()
+			if luaentity.driver then
+				luaentity.driver = nil
+			end
+			clicker:set_detach()
+		end
+		self.driver = clicker
+		clicker:set_attach(self.object, "",
+			{x = 0, y = 11, z = -3}, {x = 0, y = 0, z = 0})
+		default.player_attached[name] = true
+		minetest.after(0.2, function()
+			default.player_set_animation(clicker, "sit" , 30)
+		end)
+		clicker:set_look_horizontal(self.object:getyaw())
+	end
+end
+
+
+function bike.on_activate(self, staticdata, dtime_s)
+	self.object:setacceleration({x = 0, y = -9.8, z = 0})
+	self.object:set_armor_groups({immortal = 1})
+	if staticdata then
+		self.v = tonumber(staticdata)
+	end
+	self.last_v = self.v
+end
+
+
+function bike.get_staticdata(self)
+	return tostring(self.v)
+end
+
+
+function bike.on_punch(self, puncher)
+	if not puncher or not puncher:is_player() or self.removed then
+		return
+	end
+	if self.driver and puncher == self.driver then
+		self.driver = nil
+		puncher:set_detach()
+		default.player_attached[puncher:get_player_name()] = false
+	end
+	if not self.driver then
+		self.removed = true
+		local inv = puncher:get_inventory()
+		if not (creative and creative.is_enabled_for
+				and creative.is_enabled_for(puncher:get_player_name()))
+				or not inv:contains_item("main", "bike:bike") then
+			local leftover = inv:add_item("main", "bike:bike")
+			-- if no room in inventory add a replacement bike to the world
+			if not leftover:is_empty() then
+				minetest.add_item(self.object:getpos(), leftover)
+			end
+		end
+		-- delay remove to ensure player is detached
+		minetest.after(0.1, function()
+			self.object:remove()
+		end)
+	end
+end
+
+
+function bike.on_step(self, dtime)
+	if self.driver then
+		local ctrl = self.driver:get_player_control()
+		local yaw = self.object:getyaw()
+		if ctrl.up then
+			self.v = self.v + 0.1
+		elseif ctrl.down then
+			self.v = self.v - 0.1
+		end
+		if ctrl.left then
+			if self.v < 0 then
+				self.object:setyaw(yaw - (1 + dtime) * 0.03)
+			else
+				self.object:setyaw(yaw + (1 + dtime) * 0.03)
+			end
+		elseif ctrl.right then
+			if self.v < 0 then
+				self.object:setyaw(yaw + (1 + dtime) * 0.03)
+			else
+				self.object:setyaw(yaw - (1 + dtime) * 0.03)
+			end
+		end
+	end
+	local velo = self.object:getvelocity()
+	if self.v == 0 and velo.x == 0 and velo.y == 0 and velo.z == 0 then
+		self.object:setpos(self.object:getpos())
+		return
+	end
+	local s = get_sign(self.v)
+	self.v = self.v - 0.004 * s
+	if s ~= get_sign(self.v) then
+		self.object:setvelocity({x = 0, y = 0, z = 0})
+		self.v = 0
+		return
+	end
+	if self.v > 10 then
+		self.v = 10
+	elseif self.v < 0 then
+		self.v = 0
+	end
+
+	local p = self.object:getpos()
+	if is_water(p) then
+		self.v = self.v / 1.3
+	end
+
+	local new_velo
+	new_velo = get_velocity(self.v, self.object:getyaw(), self.object:getvelocity().y)
+	self.object:setpos(self.object:getpos())
+	self.object:setvelocity(new_velo)
+end
+
+
+minetest.register_entity("bike:bike", bike)
+
+
+minetest.register_craftitem("bike:bike", {
+	description = "bike",
+	inventory_image = "bike_inventory.png",
+	wield_image = "bike_wield.png",
+	wield_scale = {x = 2, y = 2, z = 1},
+	liquids_pointable = true,
+	groups = {flammable = 2},
+
+	on_place = function(itemstack, placer, pointed_thing)
+		local under = pointed_thing.under
+		local node = minetest.get_node(under)
+		local udef = minetest.registered_nodes[node.name]
+		if udef and udef.on_rightclick and
+				not (placer and placer:is_player() and
+				placer:get_player_control().sneak) then
+			return udef.on_rightclick(under, node, placer, itemstack,
+				pointed_thing) or itemstack
+		end
+
+		if pointed_thing.type ~= "node" then
+			return itemstack
+		end
+
+		bike = minetest.add_entity(pointed_thing.above, "bike:bike")
+		if bike then
+			if placer then
+				bike:setyaw(placer:get_look_horizontal())
+			end
+			local player_name = placer and placer:get_player_name() or ""
+			if not (creative and creative.is_enabled_for and
+					creative.is_enabled_for(player_name)) then
+				itemstack:take_item()
+			end
+		end
+		return itemstack
+	end,
+})
+
+
+--[[minetest.register_craft({
+	output = "bike:bike",
+	recipe = {
+		{"",           "",           ""          },
+		{"group:wood", "",           "group:wood"},
+		{"group:wood", "group:wood", "group:wood"},
+	},
+})
+
+minetest.register_craft({
+	type = "fuel",
+	recipe = "bike:bike",
+	burntime = 20,
+})--]]