version 0.21

mods/boat/init.lua

@@ -0,0 +1,176 @@
+--
+-- Helper functions
+--
+
+local function is_water(pos)
+	local nn = minetest.get_node(pos).name
+	return minetest.get_item_group(nn, "water") ~= 0
+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
+
+--
+-- boat entity
+--
+local boat = {
+	physical = true,
+	collisionbox = {-1,-0.5,-1, 1,0.5,1},
+	visual = "mesh",
+	mesh = "boat_base.x",
+	textures = {"boat_texture.png"},
+	driver = nil,
+	v = 0,
+	stepcount = 0,
+	unattended = 0
+}
+
+function boat.on_rightclick(self, clicker)
+	if not clicker or not clicker:is_player() then
+		return
+	end
+	if self.driver and clicker == self.driver then
+		self.driver = nil
+		clicker:set_detach()
+	elseif not self.driver then
+		self.driver = clicker
+		clicker:set_attach(self.object, "", {x=0,y=5,z=0}, {x=0,y=0,z=0})
+		self.object:setyaw(clicker:get_look_yaw())
+	end
+end
+
+function boat.on_activate(self, staticdata, dtime_s)
+	self.object:set_armor_groups({immortal=1})
+	if staticdata then
+		self.v = tonumber(staticdata)
+	end
+end
+
+function boat.get_staticdata()
+	return tostring(v)
+end
+
+function boat.on_punch(self, puncher, time_from_last_punch, tool_capabilities, direction)
+
+	 if self.driver then
+		self.driver:set_detach()
+		self.driver = nil
+		boat.schedule_removal(self)
+		if not minetest.setting_getbool("creative_mode") then
+			puncher:get_inventory():add_item("main", "boat:boat")
+		end
+	else
+
+		boat.schedule_removal(self)
+		if not minetest.setting_getbool("creative_mode") then
+			puncher:get_inventory():add_item("main", "boat:boat")
+		end
+	
+	end
+end
+
+function boat.on_step(self, dtime)
+
+	self.stepcount=self.stepcount+1
+	if self.stepcount>9 then
+	
+		self.stepcount=0
+		
+		if self.driver then
+			local ctrl = self.driver:get_player_control()
+
+			self.unattended=0
+		
+			local yaw = self.object:getyaw()
+
+			if ctrl.up and self.v<3 then
+				self.v = self.v + 1
+			end
+			
+			if ctrl.down and self.v>=-1 then
+				self.v = self.v - 1
+			end	
+			
+			if ctrl.left then
+				if ctrl.down then
+					self.object:setyaw(yaw-math.pi/12-dtime*math.pi/12)
+				else
+					self.object:setyaw(yaw+math.pi/12+dtime*math.pi/12)
+				end
+			end
+			if ctrl.right then
+				if ctrl.down then
+					self.object:setyaw(yaw+math.pi/12+dtime*math.pi/12)
+				else
+					self.object:setyaw(yaw-math.pi/12-dtime*math.pi/12)
+				end
+			end
+		end
+
+		local tmp_velocity = get_velocity(self.v, self.object:getyaw(), 0)
+
+		local tmp_pos = self.object:getpos()
+
+		tmp_velocity.y=0
+
+		if is_water(tmp_pos) then
+			tmp_velocity.y=2
+		end
+
+		tmp_pos.y=tmp_pos.y-0.5
+
+		if minetest.get_node(tmp_pos).name=="air" then
+			tmp_velocity.y=-2
+		end
+
+		self.object:setvelocity(tmp_velocity)
+
+	end
+	
+end
+
+function boat.schedule_removal(self)
+
+	minetest.after(0.25,function()
+		self.object:remove()
+	end)
+
+end
+
+
+minetest.register_entity("boat:boat", boat)
+
+minetest.register_craftitem("boat:boat", {
+	description = "Boat",
+	inventory_image = "boat_inventory.png",
+	liquids_pointable = true,
+
+	on_place = function(itemstack, placer, pointed_thing)
+		if pointed_thing.type ~= "node" then
+			return
+		end
+		if not is_water(pointed_thing.under) then
+			return
+		end
+		pointed_thing.under.y = pointed_thing.under.y+0.5
+		minetest.add_entity(pointed_thing.under, "boat:boat")
+		if not minetest.setting_getbool("creative_mode") then
+			itemstack:take_item()
+		end
+		return itemstack
+	end,
+})
+
+minetest.register_craft({
+	output = "boat:boat",
+	recipe = {
+		{"", "", ""},
+		{"", "", ""},
+		{"default:wood", "", ""},
+	},
+})
+
+minetest.debug("[boat] Mod loaded")