minetest.git - modified minetest for gpcfs purposes

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Diffstat (limited to 'src/script/lua_api/l_env.cpp')

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local mod_name = minetest.get_current_modname()

local mod_version = "2.6"

local function log(level, message)
    minetest.log(level, ('[%s] %s'):format(mod_name, message))
end

log('action', 'CSM cs_waypoints '..mod_version..' loading...')

minetest.display_chat_message("CSM cs_waypoints "..mod_version.." loading...")

local mod_storage = minetest.get_mod_storage()


local search_delta_default = 10

--
--
-- local functions
--
--

local function load_waypoints()
    if string.find(mod_storage:get_string('waypoints'), 'return') then
        return minetest.deserialize(mod_storage:get_string('waypoints'))
    else
        return {}
    end
end

local function load_waypoints_stack()
    if string.find(mod_storage:get_string('waypoints_stack'), 'return nil') then
       return {}
    end
    if string.find(mod_storage:get_string('waypoints_stack'), 'return') then
        return minetest.deserialize(mod_storage:get_string('waypoints_stack'))
    else
        return {}
    end
end

local waypoints = load_waypoints()


local function safe(func)
    -- wrap a function w/ logic to avoid crashing the game
    local f = function(...)
        local status, out = pcall(func, ...)
        if status then
            return out
        else
            log('warning', 'Error (func):  ' .. out)
            return nil
        end
    end
    return f
end


local function round(x)
   return math.floor(x+0.5)
end


local function pairsByKeys(t, f)
    local a = {}
    for n in pairs(t) do
        table.insert(a, n)
    end
    table.sort(a, f)
    local i = 0
    return function()
        i = i + 1
        if a[i] == nil then
            return nil
        else
            return a[i], t[a[i]]
        end
    end
end


local function lc_cmp(a, b)
    return a:lower() < b:lower()
end


local function tostring_point(point)
    return ('%i %i.5 %i'):format(round(point.x), round(point.y), round(point.z))
end




local function teleport_to(position_name)
   local wpname = position_name
   local waypoint = waypoints[wpname]
   if waypoint ~= nil then
      minetest.run_server_chatcommand('teleport', tostring_point(waypoint))
   else
      minetest.display_chat_message(('waypoint "%s" not found.'):format(wpname))
   end
   return true
end

local function show_pos(position_name)
   local wpname = position_name
   local waypoint = waypoints[wpname]
   local rg = ""
   if waypoint ~= nil then
      rg = wpname .. ": " .. tostring_point(waypoint)
   else
      rg = ('waypoint "%s" not found.'):format(wpname)
   end
   return true,rg
end



local function stack_push()
   local point = minetest.localplayer:get_pos()
   wp_stack = load_waypoints_stack()
   count = #wp_stack +1
   wp_stack[count] = point
   mod_storage:set_string('waypoints_stack', minetest.serialize(wp_stack))
end

local function stack_pop()
   wp_stack = load_waypoints_stack()
   count = 0
   if nil ~= wp_stack then count = #wp_stack end
   if count<1 then
      minetest.display_chat_message('stack empty - no teleporting')
      return
   end
   minetest.run_server_chatcommand('teleport', tostring_point(wp_stack[count]))
   wp_stack[count] = nil
   mod_storage:set_string('waypoints_stack', minetest.serialize(wp_stack))
   return true   
end

local function stack_use()
   wp_stack = load_waypoints_stack()
   count = 0
   if nil ~= wp_stack then count = #wp_stack end
   if count<1 then
      minetest.display_chat_message('stack empty - no teleporting')
      return
   end
   minetest.run_server_chatcommand('teleport', tostring_point(wp_stack[count]))
   return true   
end

local function stack_exch()
   wp_stack = load_waypoints_stack()
   count = 0
   if nil ~= wp_stack then count = #wp_stack end
   if count<2 then
      minetest.display_chat_message('less than 2 entries - no change')
      return
   end
   local exch        = wp_stack[count]
   wp_stack[count]   = wp_stack[count-1]
   wp_stack[count-1] = exch
   mod_storage:set_string('waypoints_stack', minetest.serialize(wp_stack))
   return true   
end


local function stack_show()
   wp_stack = load_waypoints_stack()
   count = 0
   if nil ~= wp_stack then count = #wp_stack end
   if count<1 then
      minetest.display_chat_message('stack empty')
      return true
   end
   output = ""
   for i = count,1,-1 do
      output = output .. tostring(i) .. "  " ..  tostring_point(wp_stack[i]).."\n"
   end
   return true ,output
end

local function stack_clear()
   mod_storage:set_string('waypoints_stack', minetest.serialize(nil))
end

local function  stack_search(d)   
   local delta = d
   if delta then       delta = tonumber(delta) end
   if nil == delta then delta = search_delta_default  end 
   if delta < 0 then delta = 0 end
   
   here = minetest.localplayer:get_pos()
   minetest.display_chat_message(
                ('%s : %s'):format("current position", tostring_point(here))
            )
   for name,pos in pairsByKeys(waypoints, lc_cmp) do
      if math.abs(here.y-pos.y) <= delta then
	 if math.abs(here.x-pos.x) <= delta then
	    if math.abs(here.z-pos.z) <= delta then
	       minetest.display_chat_message(
		     ('%s -> %s'):format(name, tostring_point(pos)))
	    end
	 end
      end
   end
   return true
end

local function position_shift(p)   
   local param = p
   if not p then return end
   while p:sub(1,1) == " " and p:len()> 3 do
      p = p:sub(2,99)
   end
   if p:len()<3 then return end
   direction = p:sub(1,1)
   d = ""
   if direction == "x" or direction == "X" then d = "x" end 
   if direction == "y" or direction == "Y" then d = "y" end 
   if direction == "z" or direction == "Z" then d = "z" end 
   if d == "" then return end

   here = minetest.localplayer:get_pos()

   distance = tonumber(p:sub(2,8))
   if not distance then return end
   if distance == 0 then return end
   
   here[d] = here[d] + distance 
   -- here.y  = here.y  - 1        -- correction

   minetest.run_server_chatcommand('teleport', tostring_point(here))

end

-- new shift with more than one possible shift coordinate
-- only the last value for one coordinate is used
local function position_shift2(p)   
   if not p then return end

   param = p:split(" ")

   shift = {}
   shift.x = 0
   shift.y = 0
   shift.z = 0

   vp = 1
   while (vp+1 <= #param )
   do
      direction = param[vp]
      d = ""
      if direction == "x" or direction == "X" then d = "x" end 
      if direction == "y" or direction == "Y" then d = "y" end 
      if direction == "z" or direction == "Z" then d = "z" end 
      if d ~= "" then 
	 distance = tonumber(param[vp+1])
	 if not distance then 
	    distance = 0
	 end
	 shift[direction] = distance
      end
      vp = vp+2
   end

   if shift.x == 0 and shift.y == 0 and shift.z == 0 then
      return
   end

   here = minetest.localplayer:get_pos()

   here.x = here.x+shift.x
   here.y = here.y+shift.y
   here.z = here.z+shift.z

   -- here.y  = here.y  - 1        -- correction

   minetest.run_server_chatcommand('teleport', tostring_point(here))

end


local function calc_distance(wp)
   local wpname = wp
   local waypoint = waypoints[wpname]
   local rg = ""
   if waypoint == nil then
      rg = ('waypoint "%s" not found.'):format(wp)
   else
      here = minetest.localplayer:get_pos()
      dx = math.abs(here.x-waypoint.x)
      dy = math.abs(here.y-waypoint.y)
      dz = math.abs(here.z-waypoint.z)
      l1 = "x: " .. tostring(round(100*dx)/100) .. "   y: " 
	 .. tostring(round(100*dy)/100) .. "   z: " 
	 .. tostring(round(100*dz)/100)
      delta_hor = math.floor(math.sqrt(dx*dx+dz*dz)*100)/100
      delta_3d =  math.floor(math.sqrt(dx*dx+dy*dy+dz*dz)*100)/100
      l2 = "distance: " .. tostring(delta_3d) 
	 .. "    horizontal distance: " .. tostring(delta_hor) 
      rg = l1 .. "\n" .. l2
   end


   return true,rg
end


--
--
-- chat commands
--
--


minetest.register_chatcommand('wp_set', {
    params = '<name>',
    description = 'set a waypoint',
    func = safe(function(param)
        waypoints = load_waypoints()


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