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251
mods/animalia/api/lasso.lua
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251
mods/animalia/api/lasso.lua
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-----------
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-- Lasso --
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-----------
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local abs = math.abs
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local vec_add, vec_dir, vec_dist, vec_len = vector.add, vector.direction, vector.distance, vector.length
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local dir2rot = vector.dir_to_rotation
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-- Entities --
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local using_lasso = {}
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minetest.register_entity("animalia:lasso_entity", {
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visual = "mesh",
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mesh = "animalia_lasso_entity.b3d",
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textures = {"animalia_lasso_entity.png"},
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pointable = false,
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on_activate = function(self)
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self.object:set_armor_groups({immortal = 1})
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end,
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_scale = 1,
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on_step = function(self)
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local pos, parent = self.object:get_pos(), (self.object:get_attach() or self._attached)
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local pointed_ent = self._point_to and self._point_to:get_luaentity()
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local point_to = self._point_to and self._point_to:get_pos()
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if not pos or not parent or not point_to then self.object:remove() return end
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if type(parent) == "string" then
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parent = minetest.get_player_by_name(parent)
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if not parent then self.object:remove() return end
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local tgt_pos = parent:get_pos()
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tgt_pos.y = tgt_pos.y + 1
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point_to.y = point_to.y + pointed_ent.height * 0.5
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local dist = vec_dist(pos, tgt_pos)
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if dist > 0.5 then
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self.object:set_pos(tgt_pos)
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else
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self.object:move_to(tgt_pos)
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end
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self.object:set_rotation(dir2rot(vec_dir(tgt_pos, point_to)))
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elseif parent.x then
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point_to.y = point_to.y + pointed_ent.height * 0.5
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self.object:set_rotation(dir2rot(vec_dir(pos, point_to)))
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else
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self.object:remove()
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return
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end
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local size = vec_dist(pos, point_to)
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if abs(size - self._scale) > 0.1 then
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self.object:set_properties({
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visual_size = {x = 1, y = 1, z = size}
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})
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self._scale = size
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end
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end
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})
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local function remove_from_fence(self)
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local pos = self.object:get_pos()
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local mob = self._mob and self._mob:get_luaentity()
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if not mob then
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self.object:remove()
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return
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end
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mob._lassod_to = nil
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mob:forget("_lassod_to")
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mob._lasso_ent:remove()
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local dirs = {
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{x = 0.5, y = 0, z = 0},
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{x = -0.5, y = 0, z = 0},
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{x = 0, y = 0.5, z = 0},
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{x = 0, y = -0.5, z = 0},
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{x = 0, y = 0, z = 0.5},
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{x = 0, y = 0, z = -0.5}
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}
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for i = 1, 6 do
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local i_pos = vec_add(pos, dirs[i])
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if not creatura.get_node_def(i_pos).walkable then
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minetest.add_item(i_pos, "animalia:lasso")
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break
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end
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end
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self.object:remove()
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end
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minetest.register_entity("animalia:tied_lasso_entity", {
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collisionbox = {-0.25,-0.25,-0.25, 0.25,0.25,0.25},
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visual = "cube",
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visual_size = {x = 0.3, y = 0.3},
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mesh = "model",
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textures = {
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"animalia_tied_lasso_entity.png",
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"animalia_tied_lasso_entity.png",
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"animalia_tied_lasso_entity.png",
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"animalia_tied_lasso_entity.png",
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"animalia_tied_lasso_entity.png",
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"animalia_tied_lasso_entity.png",
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},
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on_activate = function(self)
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self.object:set_armor_groups({immortal = 1})
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end,
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on_step = function(self)
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local mob = self._mob and self._mob:get_luaentity()
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if not mob then remove_from_fence(self) return end
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end,
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on_rightclick = remove_from_fence,
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on_punch = remove_from_fence
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})
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-- API --
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local function add_lasso(self, origin)
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local pos = self.object:get_pos()
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if not pos then return end
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local object = minetest.add_entity(pos, "animalia:lasso_entity")
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local ent = object and object:get_luaentity()
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if not ent then return end
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-- Attachment point of entity
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ent._attached = origin
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if type(origin) ~= "string" then
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--local player = minetest.get_player_by_name(origin)
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--object:set_attach(player)
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--else
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object:set_pos(origin)
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end
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self._lassod_to = origin
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ent._point_to = self.object
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self:memorize("_lassod_to", origin)
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return object
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end
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local function get_rope_velocity(pos1, pos2, dist)
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local force = dist / 10
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local vel = vector.new((pos2.x - pos1.x) * force, ((pos2.y - pos1.y) / (24 + dist)), (pos2.z - pos1.z) * force)
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return vel
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end
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function animalia.initialize_lasso(self)
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self._lassod_to = self:recall("_lassod_to") or self:recall("lasso_origin")
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if self._lassod_to then
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local origin = self._lassod_to
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if type(origin) == "table"
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and minetest.get_item_group(minetest.get_node(origin).name, "fence") > 0 then
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local object = minetest.add_entity(origin, "animalia:tied_lasso_entity")
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object:get_luaentity()._mob = self.object
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self._lasso_ent = add_lasso(self, origin)
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elseif type(origin) == "string" then
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self._lassod_to = origin
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self._lasso_ent = add_lasso(self, origin)
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else
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self:forget("_lassod_to")
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end
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end
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end
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function animalia.update_lasso_effects(self)
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local pos = self.object:get_pos()
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if not creatura.is_alive(self) then return end
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if self._lassod_to then
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local lasso = self._lassod_to
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self._lasso_ent = self._lasso_ent or add_lasso(self, lasso)
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if type(lasso) == "string" then
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using_lasso[lasso] = self
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local name = lasso
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lasso = minetest.get_player_by_name(lasso)
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if lasso then
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if lasso:get_wielded_item():get_name() ~= "animalia:lasso" then
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using_lasso[name] = nil
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self._lasso_ent:remove()
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self._lasso_ent = nil
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self._lassod_to = nil
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self:forget("_lassod_to")
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return
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end
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local lasso_pos = lasso:get_pos()
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local dist = vec_dist(pos, lasso_pos)
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local vel = self.object:get_velocity()
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if not vel or dist < 8 and self.touching_ground then return end
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if vec_len(vel) < 8 then
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self.object:add_velocity(get_rope_velocity(pos, lasso_pos, dist))
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end
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return
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end
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elseif type(lasso) == "table" then
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local dist = vec_dist(pos, lasso)
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local vel = self.object:get_velocity()
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if not vel or dist < 8 and self.touching_ground then return end
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if vec_len(vel) < 8 then
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self.object:add_velocity(get_rope_velocity(pos, lasso, dist))
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end
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return
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end
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end
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if self._lasso_ent then
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self._lasso_ent:remove()
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self._lasso_ent = nil
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self._lassod_to = nil
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self:forget("_lassod_to")
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end
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end
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-- Item
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minetest.register_craftitem("animalia:lasso", {
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description = "Lasso",
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inventory_image = "animalia_lasso.png",
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on_secondary_use = function(_, placer, pointed)
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local ent = pointed.ref and pointed.ref:get_luaentity()
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if ent
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and (ent.name:match("^animalia:")
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or ent.name:match("^monstrum:")) then
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if not ent.catch_with_lasso then return end
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local name = placer:get_player_name()
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if not ent._lassod_to
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and not using_lasso[name] then
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using_lasso[name] = ent
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ent._lassod_to = name
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ent:memorize("_lassod_to", name)
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elseif ent._lassod_to
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and ent._lassod_to == name then
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using_lasso[name] = nil
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ent._lassod_to = nil
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ent:forget("_lassod_to")
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end
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end
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end,
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on_place = function(itemstack, placer, pointed_thing)
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if pointed_thing.type == "node" then
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local pos = minetest.get_pointed_thing_position(pointed_thing)
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if minetest.get_item_group(minetest.get_node(pos).name, "fence") > 0 then
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local name = placer:get_player_name()
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local ent = using_lasso[name]
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if ent
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and ent._lassod_to
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and ent._lassod_to == name then
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using_lasso[name] = nil
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ent._lasso_ent:set_detach()
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ent._lasso_ent:set_pos(pos)
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ent._lasso_ent:get_luaentity()._attached = pos
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ent._lassod_to = pos
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ent:memorize("_lassod_to", pos)
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local fence_obj = minetest.add_entity(pos, "animalia:tied_lasso_entity")
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fence_obj:get_luaentity()._mob = ent.object
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fence_obj:get_luaentity()._lasso_obj = ent._lasso_ent
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itemstack:take_item(1)
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end
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end
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end
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return itemstack
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end
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})
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