Boats: Fix sinking through boat when detaching

By CProgrammerRU
Also, by paramat:
Slightly raise base of collision box
Improve code style

mods/boats/init.lua

@@ -1,4 +1,3 @@
-
 --
 -- Helper functions
 --
@@ -8,6 +7,7 @@ local function is_water(pos)
 	return minetest.get_item_group(nn, "water") ~= 0
 end
 
+
 local function get_sign(i)
 	if i == 0 then
 		return 0
@@ -16,12 +16,14 @@ local function get_sign(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
@@ -32,7 +34,7 @@ end
 
 local boat = {
 	physical = true,
-	collisionbox = {-0.5, -0.4, -0.5, 0.5, 0.3, 0.5},
+	collisionbox = {-0.5, -0.35, -0.5, 0.5, 0.3, 0.5},
 	visual = "mesh",
 	mesh = "boat.obj",
 	textures = {"default_wood.png"},
@@ -43,6 +45,7 @@ local boat = {
 	removed = false
 }
 
+
 function boat.on_rightclick(self, clicker)
 	if not clicker or not clicker:is_player() then
 		return
@@ -53,9 +56,15 @@ function boat.on_rightclick(self, clicker)
 		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
 		self.driver = clicker
-		clicker:set_attach(self.object, "", {x = 0, y = 11, z = -3}, {x = 0, y = 0, z = 0})
+		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)
@@ -64,6 +73,7 @@ function boat.on_rightclick(self, clicker)
 	end
 end
 
+
 function boat.on_activate(self, staticdata, dtime_s)
 	self.object:set_armor_groups({immortal = 1})
 	if staticdata then
@@ -72,11 +82,14 @@ function boat.on_activate(self, staticdata, dtime_s)
 	self.last_v = self.v
 end
 
+
 function boat.get_staticdata(self)
 	return tostring(self.v)
 end
 
-function boat.on_punch(self, puncher, time_from_last_punch, tool_capabilities, direction)
+
+function boat.on_punch(self, puncher, time_from_last_punch,
+		tool_capabilities, direction)
 	if not puncher or not puncher:is_player() or self.removed then
 		return
 	end
@@ -97,6 +110,7 @@ function boat.on_punch(self, puncher, time_from_last_punch, tool_capabilities, d
 	end
 end
 
+
 function boat.on_step(self, dtime)
 	self.v = get_v(self.object:getvelocity()) * get_sign(self.v)
 	if self.driver then
@@ -149,7 +163,8 @@ function boat.on_step(self, dtime)
 		else
 			new_acce = {x = 0, y = -9.8, z = 0}
 		end
-		new_velo = get_velocity(self.v, self.object:getyaw(), self.object:getvelocity().y)
+		new_velo = get_velocity(self.v, self.object:getyaw(),
+			self.object:getvelocity().y)
 		self.object:setpos(self.object:getpos())
 	else
 		p.y = p.y + 1
@@ -172,7 +187,8 @@ function boat.on_step(self, dtime)
 				self.object:setpos(pos)
 				new_velo = get_velocity(self.v, self.object:getyaw(), 0)
 			else
-				new_velo = get_velocity(self.v, self.object:getyaw(), self.object:getvelocity().y)
+				new_velo = get_velocity(self.v, self.object:getyaw(),
+					self.object:getvelocity().y)
 				self.object:setpos(self.object:getpos())
 			end
 		end
@@ -181,8 +197,10 @@ function boat.on_step(self, dtime)
 	self.object:setacceleration(new_acce)
 end
 
+
 minetest.register_entity("boats:boat", boat)
 
+
 minetest.register_craftitem("boats:boat", {
 	description = "Boat",
 	inventory_image = "boat_inventory.png",
@@ -206,6 +224,7 @@ minetest.register_craftitem("boats:boat", {
 	end,
 })
 
+
 minetest.register_craft({
 	output = "boats:boat",
 	recipe = {
@@ -214,4 +233,3 @@ minetest.register_craft({
 		{"group:wood", "group:wood", "group:wood"},
 	},
 })
-