mods/ITEMS/mcl_potions/lingering.lua

   1 local S = minetest.get_translator("mcl_potions")
   2
   3 local lingering_image = function(colorstring, opacity)
   4         if not opacity then
   5                 opacity = 127
   6         end
   7         return "mcl_potions_splash_overlay.png^[colorize:"..colorstring..":"..tostring(opacity).."^mcl_potions_lingering_bottle.png"
   8 end
   9
  10
  11 local lingering_effect_at = {}
  12
  13 local function add_lingering_effect(pos, color, def)
  14
  15         lingering_effect_at[pos] = {color = color, timer = 30, def = def}
  16
  17 end
  18
  19
  20 local lingering_timer = 0
  21 minetest.register_globalstep(function(dtime)
  22
  23         lingering_timer = lingering_timer + dtime
  24         if lingering_timer >= 1 then
  25
  26                 for pos, vals in pairs(lingering_effect_at) do
  27
  28                         vals.timer = vals.timer - lingering_timer
  29                         local d = 4 * (vals.timer / 30.0)
  30
  31                         minetest.add_particlespawner({
  32                                                                                         amount = 10 * d^2,
  33                                                                                         time = 1,
  34                                                                                         minpos = {x=pos.x-d, y=pos.y+0.5, z=pos.z-d},
  35                                                                                         maxpos = {x=pos.x+d, y=pos.y+1, z=pos.z+d},
  36                                                                                         minvel = {x=-0.5, y=0, z=-0.5},
  37                                                                                         maxvel = {x=0.5, y=0.5, z=0.5},
  38                                                                                         minacc = {x=-0.2, y=0, z=-0.2},
  39                                                                                         maxacc = {x=0.2, y=.05, z=0.2},
  40                                                                                         minexptime = 1,
  41                                                                                         maxexptime = 2,
  42                                                                                         minsize = 2,
  43                                                                                         maxsize = 4,
  44                                                                                         collisiondetection = true,
  45                                                                                         vertical = false,
  46                                                                                         texture = "mcl_potions_sprite.png^[colorize:"..vals.color..":127",
  47                                                                                 })
  48
  49                         for _, obj in pairs(minetest.get_objects_inside_radius(pos, d)) do
  50
  51                                 local entity = obj:get_luaentity()
  52                                 if obj:is_player() or entity._cmi_is_mob then
  53
  54                                         vals.def.potion_fun(obj)
  55                                         vals.timer = vals.timer / 2
  56
  57                                 end
  58                         end
  59
  60                         if vals.timer <= 0 then lingering_effect_at[pos] = nil end
  61
  62                 end
  63                 lingering_timer = 0
  64         end
  65 end)
  66
  67
  68
  69 function mcl_potions.register_lingering(name, descr, color, def)
  70
  71     local id = "mcl_potions:"..name.."_lingering"
  72     local longdesc = def.longdesc
  73     if not def.no_effect then
  74         longdesc = S("A throwable potion that will shatter on impact, where it creates a magic cloud that lingers around for a while. Any player or mob inside the cloud will receive the potion's effect, possibly repeatedly.")
  75         if def.longdesc then
  76             longdesc = longdesc .. "\n" .. def.longdesc
  77         end
  78     end
  79     minetest.register_craftitem(id, {
  80         description = descr,
  81                 _tt_help = def.tt,
  82         _doc_items_longdesc = longdesc,
  83         _doc_items_usagehelp = S("Use the “Punch” key to throw it."),
  84         inventory_image = lingering_image(color),
  85                 groups = {brewitem=1, not_in_creative_inventory=0},
  86         on_use = function(item, placer, pointed_thing)
  87             local velocity = 10
  88             local dir = placer:get_look_dir();
  89             local pos = placer:getpos();
  90             local obj = minetest.add_entity({x=pos.x+dir.x,y=pos.y+2+dir.y,z=pos.z+dir.z}, id.."_flying")
  91             obj:setvelocity({x=dir.x*velocity,y=dir.y*velocity,z=dir.z*velocity})
  92             obj:setacceleration({x=dir.x*-3, y=-9.8, z=dir.z*-3})
  93                         obj:get_luaentity()._thrower = placer:get_player_name()
  94                         if not minetest.is_creative_enabled(placer:get_player_name()) then
  95                                 item:take_item()
  96                         end
  97             return item
  98         end,
  99                 stack_max = 1,
 100                 _on_dispense = function(stack, dispenserpos, droppos, dropnode, dropdir)
 101                         local s_pos = vector.add(dispenserpos, vector.multiply(dropdir, 0.51))
 102                         local obj = minetest.add_entity({x=s_pos.x+dropdir.x,y=s_pos.y+dropdir.y,z=s_pos.z+dropdir.z}, id.."_flying")
 103                         local velocity = 22
 104                         obj:set_velocity({x=dropdir.x*velocity,y=dropdir.y*velocity,z=dropdir.z*velocity})
 105                         obj:set_acceleration({x=dropdir.x*-3, y=-9.8, z=dropdir.z*-3})
 106                 end
 107     })
 108
 109     local w = 0.7
 110
 111     minetest.register_entity(id.."_flying",{
 112         textures = {lingering_image(color)},
 113                 hp_max = 1,
 114                 visual_size = {x=w/2,y=w/2},
 115                 collisionbox = {0,0,0,0,0,0},
 116         on_step = function(self, dtime)
 117           local pos = self.object:getpos()
 118           local node = minetest.get_node(pos)
 119           local n = node.name
 120                                         local d = 4
 121                                 if n ~= "air" and n ~= "mcl_portals:portal" and n ~= "mcl_portals:portal_end" or mcl_potions.is_obj_hit(self, pos) then
 122                                                 minetest.sound_play("mcl_potions_breaking_glass", {pos = pos, max_hear_distance = 16, gain = 1})
 123                                                 add_lingering_effect(pos, color, def)
 124                                                 minetest.add_particlespawner({
 125                                                                                                                 amount = 40,
 126                                                                                                                 time = 1,
 127                                                                                                                 minpos = {x=pos.x-d, y=pos.y+0.5, z=pos.z-d},
 128                                                                                                                 maxpos = {x=pos.x+d, y=pos.y+1, z=pos.z+d},
 129                                                                                                                 minvel = {x=-0.5, y=0, z=-0.5},
 130                                                                                                                 maxvel = {x=0.5, y=0.5, z=0.5},
 131                                                                                                                 minacc = {x=-0.2, y=0, z=-0.2},
 132                                                                                                                 maxacc = {x=0.2, y=.05, z=0.2},
 133                                                                                                                 minexptime = 1,
 134                                                                                                                 maxexptime = 2,
 135                                                                                                                 minsize = 1,
 136                                                                                                                 maxsize = 2,
 137                                                                                                                 collisiondetection = true,
 138                                                                                                                 vertical = false,
 139                                                                                                                 texture = "mcl_potions_sprite.png^[colorize:"..color..":127",
 140                                                                                                         })
 141                                 self.object:remove()
 142                                         end
 143         end,
 144     })
 145 end
 146
 147 -- -- register_lingering("weakness", S("Lingering Weakness Potion"), "#6600AA", {
 148 -- --   potion_fun = function(player) mcl_potions.weakness_func(player, -4, mcl_potions.DURATION*mcl_potions.INV_FACTOR*0.25) end,
 149 -- --   -- TODO: Fix tooltip
 150 -- --   tt = time_string(mcl_potions.DURATION*mcl_potions.INV_FACTOR*0.25)
 151 -- -- })
 152 -- --
 153 -- -- register_lingering("weakness_plus", S("Lingering Weakness Potion +"), "#7700BB", {
 154 -- --   potion_fun = function(player) mcl_potions.weakness_func(player, -4, mcl_potions.DURATION_PLUS*mcl_potions.INV_FACTOR*0.25) end,
 155 -- --   -- TODO: Fix tooltip
 156 -- --   tt = time_string(mcl_potions.DURATION*mcl_potions.INV_FACTOR*0.25)
 157 -- -- })
 158 -- --
 159 -- -- register_lingering("strength", S("Lingering Strength Potion"), "#D444D4", {
 160 -- --   potion_fun = function(player) mcl_potions.strength_func(player, 3, mcl_potions.DURATION*0.25) end,
 161 -- --   -- TODO: Fix tooltip
 162 -- --   tt = time_string(mcl_potions.DURATION*0.25)
 163 -- -- })
 164 -- --
 165 -- -- register_lingering("strength_2", S("Lingering Strength Potion II"), "#D444F4", {
 166 -- --   potion_fun = function(player) mcl_potions.strength_func(player, 6, smcl_potions.DURATION_2*0.25) end,
 167 -- --   -- TODO: Fix tooltip
 168 -- --   tt = time_string(mcl_potions.DURATION_2*0.25)
 169 -- -- })
 170 -- --
 171 -- -- register_lingering("strength_plus", S("Lingering Strength Potion +"), "#D444E4", {
 172 -- --   potion_fun = function(player) mcl_potions.strength_func(player, 3, mcl_potions.DURATION_PLUS*0.25) end,
 173 -- --   -- TODO: Fix tooltip
 174 -- --   tt = time_string(mcl_potions.DURATION_PLUS*0.25)
 175 -- -- })