Initial version with template textures

README.txt

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+airboat 0.1.0 by paramat
+For Minetest 0.5.0dev (of 10/06/18) and later
+Depends default
+
+Licenses:
+Source code: MIT by paramat
+Media: Textures CC0

depends.txt

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+default
+player_api

init.lua

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+local function is_water(pos)
+	local nn = minetest.get_node(pos).name
+	return minetest.get_item_group(nn, "water") ~= 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
+
+
+local airboat = {
+	physical = true,
+	collisionbox = {-0.85, -1.5, -0.85, 0.85, 1.5, 0.85},
+	visual = "wielditem",
+	visual_size = {x = 2.0, y = 2.0}, -- Scale up of nodebox is these * 1.5
+	textures = {"airboat:airboat_nodebox"},
+
+	driver = nil,
+	v = 0,
+	vy = 0,
+	removed = false
+}
+
+
+function airboat.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.driver = nil
+		clicker:set_detach()
+		player_api.player_attached[name] = false
+		player_api.set_animation(clicker, "stand" , 30)
+		local pos = clicker:getpos()
+		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 = -1, z = 0}, {x = 0, y = 0, z = 0})
+		player_api.player_attached[name] = true
+		minetest.after(0.2, function()
+			player_api.set_animation(clicker, "sit" , 30)
+		end)
+		clicker:set_look_horizontal(self.object:getyaw())
+	end
+end
+
+
+function airboat.on_activate(self, staticdata, dtime_s)
+	self.object:set_armor_groups({immortal = 1})
+end
+
+
+function airboat.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()
+		player_api.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", "airboat:airboat") then
+			local leftover = inv:add_item("main", "airboat:airboat")
+			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 airboat.on_step(self, dtime)
+	self.v = get_v(self.object:getvelocity()) * get_sign(self.v)
+	self.vy = self.object:getvelocity().y
+	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
+			self.object:setyaw(yaw + (1 + dtime) * 0.02)
+		elseif ctrl.right then
+			self.object:setyaw(yaw - (1 + dtime) * 0.02)
+		end
+		if ctrl.jump then
+			self.vy = self.vy + 0.075
+		elseif ctrl.sneak then
+			self.vy = self.vy - 0.075
+		end
+	end
+	local velo = self.object:getvelocity()
+	if self.v == 0 and self.vy == 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 - 0.02 * s
+	if s ~= get_sign(self.v) then
+		self.v = 0
+	end
+	if math.abs(self.v) > 6 then
+		self.v = 6 * get_sign(self.v)
+	end
+
+	local sy = get_sign(self.vy)
+	self.vy = self.vy - 0.04 * sy
+	if sy ~= get_sign(self.vy) then
+		self.vy = 0
+	end
+	if math.abs(self.vy) > 4 then
+		self.vy = 4 * get_sign(self.vy)
+	end
+
+	local new_acce = {x = 0, y = 0, z = 0}
+	local p = self.object:getpos()
+	p.y = p.y - 1.5
+	if is_water(p) then
+		new_acce = {x = 0, y = 20, z = 0}
+	end
+
+	self.object:setpos(self.object:getpos())
+	local new_velo = get_velocity(self.v, self.object:getyaw(), self.vy)
+	self.object:setvelocity(new_velo)
+	self.object:setacceleration(new_acce)
+end
+
+
+minetest.register_entity("airboat:airboat", airboat)
+
+
+minetest.register_craftitem("airboat:airboat", {
+	description = "Airboat",
+	inventory_image = "airboat_airboat_inv.png",
+	wield_scale = {x = 4, y = 4, z = 4},
+	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
+		pointed_thing.under.y = pointed_thing.under.y + 2
+		boat = minetest.add_entity(pointed_thing.under, "airboat:airboat")
+		if boat then
+			if placer then
+				boat: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_node("airboat:airboat_nodebox", {
+	description = "Airboat Nodebox",
+	tiles = { -- top base right left front back
+		"airboat_airboat_top.png",
+		"airboat_airboat_base.png",
+		"airboat_airboat_right.png",
+		"airboat_airboat_left.png",
+		"airboat_airboat_front.png",
+		"airboat_airboat_back.png",
+	},
+	paramtype = "light",
+	drawtype = "nodebox",
+	node_box = {
+		type = "fixed",
+		fixed = { -- widmin heimin lenmin widmax heimax lenmax
+			{-0.271, -0.167, -0.5,  0.271, 0.375, 0.5}, -- Envelope
+			{-0.167, -0.5, -0.25,   0.167, -0.167, 0.25}, -- Gondola
+			{-0.021, 0.375, -0.5,   0.021, 0.5, -0.25}, -- Top fin
+			{-0.021, -0.292, -0.5,  0.021, -0.167, -0.25}, -- Base fin
+			{-0.396, 0.083, -0.5,   -0.271, 0.125, -0.25}, -- Left fin
+			{0.271, 0.083, -0.5,    0.396, 0.125, -0.25}, -- Right fin
+		},
+	},
+	groups = {not_in_creative_inventory = 1},
+})

license.txt

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+License of source code
+----------------------
+
+The MIT License (MIT)
+Copyright (C) 2017 paramat
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this
+software and associated documentation files (the "Software"), to deal in the Software
+without restriction, including without limitation the rights to use, copy, modify, merge,
+publish, distribute, sublicense, and/or sell copies of the Software, and to permit
+persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or
+substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
+PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
+FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.
+
+For more details:
+https://opensource.org/licenses/MIT
+
+
+License of media (textures)
+---------------------------
+
+CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
+
+Paramat
+
+No Copyright
+
+The person who associated a work with this deed has dedicated the work to the
+public domain by waiving all of his or her rights to the work worldwide under
+copyright law, including all related and neighboring rights, to the extent
+allowed by law.
+
+You can copy, modify, distribute and perform the work, even for commercial
+purposes, all without asking permission. See Other Information below.
+
+Other Information:
+
+In no way are the patent or trademark rights of any person affected by CC0, nor
+are the rights that other persons may have in the work or in how the work is
+used, such as publicity or privacy rights.
+
+Unless expressly stated otherwise, the person who associated a work with this
+deed makes no warranties about the work, and disclaims liability for all uses
+of the work, to the fullest extent permitted by applicable law.
+
+When using or citing the work, you should not imply endorsement by the author
+or the affirmer.
+
+For more details:
+https://creativecommons.org/publicdomain/zero/1.0/