book.lua

   1 local book_animations = {["close"] = 1, ["opening"] = 2, ["open"] = 3, ["closing"] = 4}
   2 local book_animation_steps = {0, 640, 680, 700, 740}
   3 local book_animation_speed = 40
   4
   5 function mcl_enchanting.schedule_book_animation(self, anim)
   6         self.scheduled_anim = {timer = self.anim_length, anim = anim}
   7 end
   8
   9 function mcl_enchanting.set_book_animation(self, anim)
  10         local anim_index = book_animations[anim]
  11         local start, stop = book_animation_steps[anim_index], book_animation_steps[anim_index + 1]
  12         self.object:set_animation({x = start, y = stop}, book_animation_speed)
  13         self.scheduled_anim = nil
  14         self.anim_length = (stop - start) / 40
  15 end
  16
  17 function mcl_enchanting.check_animation_schedule(self, dtime)
  18         local schedanim = self.scheduled_anim
  19         if schedanim then
  20                 schedanim.timer = schedanim.timer - dtime
  21                 if schedanim.timer <= 0 then
  22                          mcl_enchanting.set_book_animation(self, schedanim.anim)local pos1=self.object:get_pos()
  23                 end
  24         end
  25 end
  26
  27 function mcl_enchanting.look_at(self, pos2)
  28         local pos1 = self.object:get_pos()
  29         local vec = vector.subtract(pos1, pos2)
  30         local yaw = math.atan(vec.z / vec.x) - math.pi/2
  31         yaw = yaw + (pos1.x >= pos2.x and math.pi or 0)
  32         self.object:set_yaw(yaw + math.pi)
  33 end
  34
  35 function mcl_enchanting.check_book(pos)
  36         obj_pos = vector.add(pos, mcl_enchanting.book_offset)
  37         for _, obj in pairs(minetest.get_objects_inside_radius(obj_pos, 0.1)) do
  38                 local luaentity = obj:get_luaentity()
  39                 if luaentity and luaentity.name == "mcl_enchanting:book" then
  40                         if minetest.get_node(pos).name ~= "mcl_enchanting:table" then
  41                                 obj:remove()
  42                         end
  43                         return
  44                 end
  45         end
  46         minetest.add_entity(obj_pos, "mcl_enchanting:book")
  47 end
  48
  49 minetest.register_entity("mcl_enchanting:book", {
  50         initial_properties = {
  51                 visual = "mesh",
  52                 mesh = "mcl_enchanting_book.b3d",
  53                 visual_size = {x = 12.5, y = 12.5},
  54                 collisionbox = {0, 0, 0},
  55                 physical = false,
  56                 textures = {"mcl_enchanting_book_entity.png"},
  57         },
  58         player_near = false,
  59         on_activate = function(self)
  60                 self.object:set_armor_groups({immortal = 1})
  61                 mcl_enchanting.set_book_animation(self, "close")
  62                 mcl_enchanting.check_book(vector.subtract(self.object:get_pos(), mcl_enchanting.book_offset))
  63         end,
  64         on_step = function(self, dtime)
  65                 local old_player_near = self.player_near
  66                 local player_near = false
  67                 local player
  68                 for _, obj in pairs(minetest.get_objects_inside_radius(self.object:get_pos(), 2.5)) do
  69                         if obj:is_player() then
  70                                 player_near = true
  71                                 player = obj
  72                         end
  73                 end
  74                 if player_near and not old_player_near then
  75                         mcl_enchanting.set_book_animation(self, "opening")
  76                         mcl_enchanting.schedule_book_animation(self, "open")
  77                 elseif old_player_near and not player_near then
  78                         mcl_enchanting.set_book_animation(self, "closing")
  79                         mcl_enchanting.schedule_book_animation(self, "close")
  80                 end
  81                 if player then
  82                         mcl_enchanting.look_at(self, player:get_pos())
  83                 end
  84                 self.player_near = player_near
  85                 mcl_enchanting.check_animation_schedule(self, dtime)
  86         end,
  87 })