From a59864dd74ab104621bd55fc15256a92f2864f8e Mon Sep 17 00:00:00 2001
From: SmallJoker <mk939@ymail.com>
Date: Sat, 25 Oct 2014 18:49:28 +0200
Subject: [PATCH] Transport items; do not remove carts in walls

---
 init.lua | 25 ++++++++++++++++++++++---
 1 file changed, 22 insertions(+), 3 deletions(-)

diff --git a/init.lua b/init.lua
index 6c643ae..cf0ee7c 100644
--- a/init.lua
+++ b/init.lua
@@ -29,7 +29,8 @@ boost_cart.cart = {
 	velocity = {x=0, y=0, z=0}, -- only used on punch
 	old_dir = {x=0, y=0, z=0},
 	old_pos = nil,
-	old_switch = nil
+	old_switch = nil,
+	attached_items = {}
 }
 
 function boost_cart.cart:on_rightclick(clicker)
@@ -57,12 +58,21 @@ function boost_cart.cart:on_punch(puncher, time_from_last_punch, tool_capabiliti
 
 	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
+		for _,obj_ in ipairs(self.attached_items) do
+			if obj_ then
+				obj_:set_detach()
+			end
+		end
+		
 		self.object:remove()
 		puncher:get_inventory():add_item("main", "carts:cart")
 		return
@@ -143,7 +153,6 @@ function boost_cart.cart:on_step(dtime)
 					pos = vector.new(expected_pos)
 					self.punch = true
 				end
-				--minetest.log("action", "Cart moving too fast at "..minetest.pos_to_string(expected_pos))
 				break
 			end
 		end
@@ -241,7 +250,7 @@ function boost_cart.cart:on_step(dtime)
 	if dir.x < 0 then
 		yaw = 0.5
 	elseif dir.x > 0 then
-		yaw = 3 / 2
+		yaw = 1.5
 	elseif dir.z < 0 then
 		yaw = 1
 	end
@@ -258,6 +267,16 @@ function boost_cart.cart:on_step(dtime)
 	if self.punch then
 		self.object:setvelocity(vel)
 		self.object:setpos(pos)
+		
+		for _,obj_ in ipairs(minetest.get_objects_inside_radius(pos, 1)) do
+			if not obj_:is_player() and
+					obj_:get_luaentity() and
+					not obj_:get_luaentity().physical_state and
+					obj_:get_luaentity().name == "__builtin:item" then
+				obj_:set_attach(self.object, "", {x=0, y=0, z=0}, {x=0, y=0, z=0})
+				self.attached_items[#self.attached_items + 1] = obj_
+			end
+		end
 	end
 	self.punch = false
 end