596 lines
16 KiB
Lua
596 lines
16 KiB
Lua
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dofile(minetest.get_modpath("carts").."/functions.lua")
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--
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-- Cart entity
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--
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local cart = {
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physical = false,
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collisionbox = {-0.5,-0.5,-0.5, 0.5,0.5,0.5},
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visual = "mesh",
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mesh = "cart.x",
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visual_size = {x=1, y=1},
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textures = {"cart.png"},
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driver = nil,
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velocity = {x=0, y=0, z=0},
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old_pos = nil,
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old_velocity = nil,
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pre_stop_dir = nil,
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MAX_V = 8, -- Limit of the velocity
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}
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function cart:on_rightclick(clicker)
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if not clicker or not clicker:is_player() then
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return
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end
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if self.driver and clicker == self.driver then
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self.driver = nil
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clicker:set_detach()
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elseif not self.driver then
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self.driver = clicker
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clicker:set_attach(self.object, "", {x=0,y=5,z=0}, {x=0,y=0,z=0})
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end
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end
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function cart:on_activate(staticdata, dtime_s)
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self.object:set_armor_groups({immortal=1})
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if staticdata then
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local tmp = minetest.deserialize(staticdata)
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if tmp then
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self.velocity = tmp.velocity
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end
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if tmp and tmp.pre_stop_dir then
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self.pre_stop_dir = tmp.pre_stop_dir
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end
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end
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self.old_pos = self.object:getpos()
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self.old_velocity = self.velocity
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end
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function cart:get_staticdata()
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return minetest.serialize({
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velocity = self.velocity,
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pre_stop_dir = self.pre_stop_dir,
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})
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end
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-- Remove the cart if holding a tool or accelerate it
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function cart:on_punch(puncher, time_from_last_punch, tool_capabilities, direction)
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if not puncher or not puncher:is_player() then
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return
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end
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if puncher:get_player_control().sneak then
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self.object:remove()
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local inv = puncher:get_inventory()
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if minetest.setting_getbool("creative_mode") then
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if not inv:contains_item("main", "carts:cart") then
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inv:add_item("main", "carts:cart")
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end
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else
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inv:add_item("main", "carts:cart")
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end
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return
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end
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if puncher == self.driver then
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return
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end
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local d = cart_func:velocity_to_dir(direction)
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local s = self.velocity
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if time_from_last_punch > tool_capabilities.full_punch_interval then
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time_from_last_punch = tool_capabilities.full_punch_interval
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end
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local f = 4*(time_from_last_punch/tool_capabilities.full_punch_interval)
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local v = {x=s.x+d.x*f, y=s.y, z=s.z+d.z*f}
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if math.abs(v.x) < 6 and math.abs(v.z) < 6 then
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self.velocity = v
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else
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if math.abs(self.velocity.x) < 6 and math.abs(v.x) >= 6 then
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self.velocity.x = 6*cart_func:get_sign(self.velocity.x)
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end
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if math.abs(self.velocity.z) < 6 and math.abs(v.z) >= 6 then
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self.velocity.z = 6*cart_func:get_sign(self.velocity.z)
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end
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end
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end
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-- Returns the direction as a unit vector
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function cart:get_rail_direction(pos, dir)
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local d = cart_func.v3:copy(dir)
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-- Check front
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d.y = 0
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local p = cart_func.v3:add(cart_func.v3:copy(pos), d)
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if cart_func:is_rail(p) then
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return d
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end
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-- Check downhill
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d.y = -1
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p = cart_func.v3:add(cart_func.v3:copy(pos), d)
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if cart_func:is_rail(p) then
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return d
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end
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-- Check uphill
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d.y = 1
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p = cart_func.v3:add(cart_func.v3:copy(pos), d)
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if cart_func:is_rail(p) then
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return d
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end
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d.y = 0
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-- Check left and right
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local view_dir
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local other_dir
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local a
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if d.x == 0 and d.z ~= 0 then
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view_dir = "z"
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other_dir = "x"
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if d.z < 0 then
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a = {1, -1}
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else
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a = {-1, 1}
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end
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elseif d.z == 0 and d.x ~= 0 then
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view_dir = "x"
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other_dir = "z"
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if d.x > 0 then
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a = {1, -1}
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else
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a = {-1, 1}
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end
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else
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return {x=0, y=0, z=0}
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end
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d[view_dir] = 0
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d[other_dir] = a[1]
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p = cart_func.v3:add(cart_func.v3:copy(pos), d)
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if cart_func:is_rail(p) then
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return d
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end
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d.y = -1
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p = cart_func.v3:add(cart_func.v3:copy(pos), d)
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if cart_func:is_rail(p) then
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return d
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end
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d.y = 0
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d[other_dir] = a[2]
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p = cart_func.v3:add(cart_func.v3:copy(pos), d)
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if cart_func:is_rail(p) then
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return d
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end
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d.y = -1
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p = cart_func.v3:add(cart_func.v3:copy(pos), d)
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if cart_func:is_rail(p) then
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return d
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end
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d.y = 0
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return {x=0, y=0, z=0}
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end
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function cart:calc_rail_direction(pos, vel)
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local velocity = cart_func.v3:copy(vel)
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local p = cart_func.v3:copy(pos)
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if cart_func:is_int(p.x) and cart_func:is_int(p.z) then
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local dir = cart_func:velocity_to_dir(velocity)
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local dir_old = cart_func.v3:copy(dir)
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dir = self:get_rail_direction(cart_func.v3:round(p), dir)
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local v = math.max(math.abs(velocity.x), math.abs(velocity.z))
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velocity = {
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x = v * dir.x,
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y = v * dir.y,
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z = v * dir.z,
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}
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if cart_func.v3:equal(velocity, {x=0, y=0, z=0}) and not cart_func:is_rail(p) then
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-- First try this HACK
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-- Move the cart on the rail if above or under it
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if cart_func:is_rail(cart_func.v3:add(p, {x=0, y=1, z=0})) and vel.y >= 0 then
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p = cart_func.v3:add(p, {x=0, y=1, z=0})
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return self:calc_rail_direction(p, vel)
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end
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if cart_func:is_rail(cart_func.v3:add(p, {x=0, y=-1, z=0})) and vel.y <= 0 then
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p = cart_func.v3:add(p, {x=0, y=-1, z=0})
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return self:calc_rail_direction(p, vel)
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end
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-- Now the HACK gets really dirty
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if cart_func:is_rail(cart_func.v3:add(p, {x=0, y=2, z=0})) and vel.y >= 0 then
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p = cart_func.v3:add(p, {x=0, y=1, z=0})
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return self:calc_rail_direction(p, vel)
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end
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if cart_func:is_rail(cart_func.v3:add(p, {x=0, y=-2, z=0})) and vel.y <= 0 then
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p = cart_func.v3:add(p, {x=0, y=-1, z=0})
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return self:calc_rail_direction(p, vel)
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end
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return {x=0, y=0, z=0}, p
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end
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if not cart_func.v3:equal(dir, dir_old) then
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return velocity, cart_func.v3:round(p)
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end
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end
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return velocity, p
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end
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function cart:on_step(dtime)
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local pos = self.object:getpos()
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local dir = cart_func:velocity_to_dir(self.velocity)
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if not cart_func.v3:equal(self.velocity, {x=0,y=0,z=0}) then
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self.pre_stop_dir = cart_func:velocity_to_dir(self.velocity)
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end
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-- Stop the cart if the velocity is nearly 0
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-- Only if on a flat railway
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if dir.y == 0 then
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if math.abs(self.velocity.x) < 0.1 and math.abs(self.velocity.z) < 0.1 then
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-- Start the cart if powered from mesecons
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local a = tonumber(minetest.env:get_meta(pos):get_string("cart_acceleration"))
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if a and a ~= 0 then
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if self.pre_stop_dir and cart_func.v3:equal(self:get_rail_direction(self.object:getpos(), self.pre_stop_dir), self.pre_stop_dir) then
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self.velocity = {
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x = self.pre_stop_dir.x * 0.2,
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y = self.pre_stop_dir.y * 0.2,
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z = self.pre_stop_dir.z * 0.2,
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}
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self.old_velocity = self.velocity
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return
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end
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for _,y in ipairs({0,-1,1}) do
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for _,z in ipairs({1,-1}) do
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if cart_func.v3:equal(self:get_rail_direction(self.object:getpos(), {x=0, y=y, z=z}), {x=0, y=y, z=z}) then
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self.velocity = {
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x = 0,
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y = 0.2*y,
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z = 0.2*z,
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}
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self.old_velocity = self.velocity
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return
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end
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end
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for _,x in ipairs({1,-1}) do
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if cart_func.v3:equal(self:get_rail_direction(self.object:getpos(), {x=x, y=y, z=0}), {x=x, y=y, z=0}) then
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self.velocity = {
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x = 0.2*x,
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y = 0.2*y,
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z = 0,
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}
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self.old_velocity = self.velocity
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return
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end
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end
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end
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end
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self.velocity = {x=0, y=0, z=0}
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self.object:setvelocity(self.velocity)
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self.old_velocity = self.velocity
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self.old_pos = self.object:getpos()
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return
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end
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end
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--
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-- Set the new moving direction
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--
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-- Recalcualte the rails that are passed since the last server step
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local old_dir = cart_func:velocity_to_dir(self.old_velocity)
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if old_dir.x ~= 0 then
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local sign = cart_func:get_sign(pos.x-self.old_pos.x)
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while true do
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if sign ~= cart_func:get_sign(pos.x-self.old_pos.x) or pos.x == self.old_pos.x then
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break
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end
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self.old_pos.x = self.old_pos.x + cart_func:get_sign(pos.x-self.old_pos.x)*0.1
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self.old_pos.y = self.old_pos.y + cart_func:get_sign(pos.x-self.old_pos.x)*0.1*old_dir.y
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self.old_velocity, self.old_pos = self:calc_rail_direction(self.old_pos, self.old_velocity)
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old_dir = cart_func:velocity_to_dir(self.old_velocity)
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if not cart_func.v3:equal(cart_func:velocity_to_dir(self.old_velocity), dir) then
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self.velocity = self.old_velocity
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pos = self.old_pos
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self.object:setpos(self.old_pos)
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break
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end
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end
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elseif old_dir.z ~= 0 then
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local sign = cart_func:get_sign(pos.z-self.old_pos.z)
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while true do
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if sign ~= cart_func:get_sign(pos.z-self.old_pos.z) or pos.z == self.old_pos.z then
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break
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end
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self.old_pos.z = self.old_pos.z + cart_func:get_sign(pos.z-self.old_pos.z)*0.1
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self.old_pos.y = self.old_pos.y + cart_func:get_sign(pos.z-self.old_pos.z)*0.1*old_dir.y
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self.old_velocity, self.old_pos = self:calc_rail_direction(self.old_pos, self.old_velocity)
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old_dir = cart_func:velocity_to_dir(self.old_velocity)
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if not cart_func.v3:equal(cart_func:velocity_to_dir(self.old_velocity), dir) then
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self.velocity = self.old_velocity
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pos = self.old_pos
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self.object:setpos(self.old_pos)
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break
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end
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end
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end
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-- Calculate the new step
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self.velocity, pos = self:calc_rail_direction(pos, self.velocity)
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self.object:setpos(pos)
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dir = cart_func:velocity_to_dir(self.velocity)
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-- Accelerate or decelerate the cart according to the pitch and acceleration of the rail node
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local a = tonumber(minetest.env:get_meta(pos):get_string("cart_acceleration"))
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if not a then
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a = 0
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end
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if self.velocity.y < 0 then
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self.velocity = {
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x = self.velocity.x + (a+0.13)*cart_func:get_sign(self.velocity.x),
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y = self.velocity.y + (a+0.13)*cart_func:get_sign(self.velocity.y),
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z = self.velocity.z + (a+0.13)*cart_func:get_sign(self.velocity.z),
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}
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elseif self.velocity.y > 0 then
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self.velocity = {
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x = self.velocity.x + (a-0.1)*cart_func:get_sign(self.velocity.x),
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y = self.velocity.y + (a-0.1)*cart_func:get_sign(self.velocity.y),
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z = self.velocity.z + (a-0.1)*cart_func:get_sign(self.velocity.z),
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}
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else
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self.velocity = {
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x = self.velocity.x + (a-0.03)*cart_func:get_sign(self.velocity.x),
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y = self.velocity.y + (a-0.03)*cart_func:get_sign(self.velocity.y),
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z = self.velocity.z + (a-0.03)*cart_func:get_sign(self.velocity.z),
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}
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-- Place the cart exactly on top of the rail
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if cart_func:is_rail(cart_func.v3:round(pos)) then
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self.object:setpos({x=pos.x, y=math.floor(pos.y+0.5), z=pos.z})
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pos = self.object:getpos()
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end
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end
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-- Dont switch moving direction
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-- Only if on flat railway
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if dir.y == 0 then
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if cart_func:get_sign(dir.x) ~= cart_func:get_sign(self.velocity.x) then
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self.velocity.x = 0
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end
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if cart_func:get_sign(dir.y) ~= cart_func:get_sign(self.velocity.y) then
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self.velocity.y = 0
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end
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if cart_func:get_sign(dir.z) ~= cart_func:get_sign(self.velocity.z) then
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self.velocity.z = 0
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end
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end
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-- Allow only one moving direction (multiply the other one with 0)
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dir = cart_func:velocity_to_dir(self.velocity)
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self.velocity = {
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x = math.abs(self.velocity.x) * dir.x,
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y = self.velocity.y,
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z = math.abs(self.velocity.z) * dir.z,
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}
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-- Move cart exactly on the rail
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if dir.x ~= 0 and not cart_func:is_int(pos.z) then
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pos.z = math.floor(0.5+pos.z)
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self.object:setpos(pos)
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elseif dir.z ~= 0 and not cart_func:is_int(pos.x) then
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pos.x = math.floor(0.5+pos.x)
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self.object:setpos(pos)
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end
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-- Limit the velocity
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if math.abs(self.velocity.x) > self.MAX_V then
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self.velocity.x = self.MAX_V*cart_func:get_sign(self.velocity.x)
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end
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if math.abs(self.velocity.y) > self.MAX_V then
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self.velocity.y = self.MAX_V*cart_func:get_sign(self.velocity.y)
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end
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if math.abs(self.velocity.z) > self.MAX_V then
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self.velocity.z = self.MAX_V*cart_func:get_sign(self.velocity.z)
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end
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self.object:setvelocity(self.velocity)
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self.old_pos = self.object:getpos()
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self.old_velocity = cart_func.v3:copy(self.velocity)
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if dir.x < 0 then
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self.object:setyaw(math.pi/2)
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elseif dir.x > 0 then
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self.object:setyaw(3*math.pi/2)
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elseif dir.z < 0 then
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self.object:setyaw(math.pi)
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elseif dir.z > 0 then
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self.object:setyaw(0)
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end
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if dir.y == -1 then
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self.object:set_animation({x=1, y=1}, 1, 0)
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elseif dir.y == 1 then
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self.object:set_animation({x=2, y=2}, 1, 0)
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else
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self.object:set_animation({x=0, y=0}, 1, 0)
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end
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end
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minetest.register_entity("carts:cart", cart)
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minetest.register_craftitem("carts:cart", {
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description = "Minecart",
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inventory_image = minetest.inventorycube("cart_top.png", "cart_side.png", "cart_side.png"),
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wield_image = "cart_side.png",
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on_place = function(itemstack, placer, pointed_thing)
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if not pointed_thing.type == "node" then
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return
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end
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if cart_func:is_rail(pointed_thing.under) then
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minetest.env:add_entity(pointed_thing.under, "carts:cart")
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if not minetest.setting_getbool("creative_mode") then
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itemstack:take_item()
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end
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return itemstack
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elseif cart_func:is_rail(pointed_thing.above) then
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minetest.env:add_entity(pointed_thing.above, "carts:cart")
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if not minetest.setting_getbool("creative_mode") then
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itemstack:take_item()
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end
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return itemstack
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end
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end,
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})
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minetest.register_craft({
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output = "carts:cart",
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recipe = {
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{"", "", ""},
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{"default:steel_ingot", "", "default:steel_ingot"},
|
|
{"default:steel_ingot", "default:steel_ingot", "default:steel_ingot"},
|
|
},
|
|
})
|
|
|
|
--
|
|
-- Mesecon support
|
|
--
|
|
|
|
minetest.register_node(":default:rail", {
|
|
description = "Rail",
|
|
drawtype = "raillike",
|
|
tiles = {"default_rail.png", "default_rail_curved.png", "default_rail_t_junction.png", "default_rail_crossing.png"},
|
|
inventory_image = "default_rail.png",
|
|
wield_image = "default_rail.png",
|
|
paramtype = "light",
|
|
is_ground_content = true,
|
|
walkable = false,
|
|
selection_box = {
|
|
type = "fixed",
|
|
-- but how to specify the dimensions for curved and sideways rails?
|
|
fixed = {-1/2, -1/2, -1/2, 1/2, -1/2+1/16, 1/2},
|
|
},
|
|
groups = {bendy=2,snappy=1,dig_immediate=2,attached_node=1,rail=1,connect_to_raillike=1},
|
|
})
|
|
|
|
minetest.register_node("carts:powerrail", {
|
|
description = "Powered Rail",
|
|
drawtype = "raillike",
|
|
tiles = {"carts_rail_pwr.png", "carts_rail_curved_pwr.png", "carts_rail_t_junction_pwr.png", "carts_rail_crossing_pwr.png"},
|
|
inventory_image = "carts_rail_pwr.png",
|
|
wield_image = "carts_rail_pwr.png",
|
|
paramtype = "light",
|
|
is_ground_content = true,
|
|
walkable = false,
|
|
selection_box = {
|
|
type = "fixed",
|
|
-- but how to specify the dimensions for curved and sideways rails?
|
|
fixed = {-1/2, -1/2, -1/2, 1/2, -1/2+1/16, 1/2},
|
|
},
|
|
groups = {bendy=2,snappy=1,dig_immediate=2,attached_node=1,rail=1,connect_to_raillike=1},
|
|
|
|
after_place_node = function(pos, placer, itemstack)
|
|
if not mesecon then
|
|
minetest.env:get_meta(pos):set_string("cart_acceleration", "0.5")
|
|
end
|
|
end,
|
|
|
|
mesecons = {
|
|
effector = {
|
|
action_on = function(pos, node)
|
|
minetest.env:get_meta(pos):set_string("cart_acceleration", "0.5")
|
|
end,
|
|
|
|
action_off = function(pos, node)
|
|
minetest.env:get_meta(pos):set_string("cart_acceleration", "0")
|
|
end,
|
|
},
|
|
},
|
|
})
|
|
|
|
minetest.register_node("carts:brakerail", {
|
|
description = "Brake Rail",
|
|
drawtype = "raillike",
|
|
tiles = {"carts_rail_brk.png", "carts_rail_curved_brk.png", "carts_rail_t_junction_brk.png", "carts_rail_crossing_brk.png"},
|
|
inventory_image = "carts_rail_brk.png",
|
|
wield_image = "carts_rail_brk.png",
|
|
paramtype = "light",
|
|
is_ground_content = true,
|
|
walkable = false,
|
|
selection_box = {
|
|
type = "fixed",
|
|
-- but how to specify the dimensions for curved and sideways rails?
|
|
fixed = {-1/2, -1/2, -1/2, 1/2, -1/2+1/16, 1/2},
|
|
},
|
|
groups = {bendy=2,snappy=1,dig_immediate=2,attached_node=1,rail=1,connect_to_raillike=1},
|
|
|
|
after_place_node = function(pos, placer, itemstack)
|
|
if not mesecon then
|
|
minetest.env:get_meta(pos):set_string("cart_acceleration", "-0.2")
|
|
end
|
|
end,
|
|
|
|
mesecons = {
|
|
effector = {
|
|
action_on = function(pos, node)
|
|
minetest.env:get_meta(pos):set_string("cart_acceleration", "-0.2")
|
|
end,
|
|
|
|
action_off = function(pos, node)
|
|
minetest.env:get_meta(pos):set_string("cart_acceleration", "0")
|
|
end,
|
|
},
|
|
},
|
|
})
|
|
|
|
minetest.register_craft({
|
|
output = "carts:powerrail 2",
|
|
recipe = {
|
|
{"default:steel_ingot", "default:mese_crystal_fragment", "default:steel_ingot"},
|
|
{"default:steel_ingot", "default:stick", "default:steel_ingot"},
|
|
{"default:steel_ingot", "", "default:steel_ingot"},
|
|
}
|
|
})
|
|
|
|
minetest.register_craft({
|
|
output = "carts:powerrail 2",
|
|
recipe = {
|
|
{"default:steel_ingot", "", "default:steel_ingot"},
|
|
{"default:steel_ingot", "default:stick", "default:steel_ingot"},
|
|
{"default:steel_ingot", "default:mese_crystal_fragment", "default:steel_ingot"},
|
|
}
|
|
})
|
|
|
|
minetest.register_craft({
|
|
output = "carts:brakerail 2",
|
|
recipe = {
|
|
{"default:steel_ingot", "default:coal_lump", "default:steel_ingot"},
|
|
{"default:steel_ingot", "default:stick", "default:steel_ingot"},
|
|
{"default:steel_ingot", "", "default:steel_ingot"},
|
|
}
|
|
})
|
|
|
|
minetest.register_craft({
|
|
output = "carts:brakerail 2",
|
|
recipe = {
|
|
{"default:steel_ingot", "", "default:steel_ingot"},
|
|
{"default:steel_ingot", "default:stick", "default:steel_ingot"},
|
|
{"default:steel_ingot", "default:coal_lump", "default:steel_ingot"},
|
|
}
|
|
})
|