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62 lines
1.7 KiB
Lua
62 lines
1.7 KiB
Lua
global.follows = {}
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global.follows.n_entries = 0
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local Utils = require "utils.utils"
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local Game = require 'utils.game'
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function get_direction(follower, target)
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local delta_x = target.position.x - follower.position.x
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local delta_y = follower.position.y - target.position.y --reversed x axis
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local a = delta_y/delta_x
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if a >= -1.5 and a < -0.5 then
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--SE OR NW
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if delta_x > 0 then
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return defines.direction.southeast
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else
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return defines.direction.northwest
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end
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elseif a >= -0.5 and a < 0.5 then
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--E OR W
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if delta_x > 0 then
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return defines.direction.east
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else
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return defines.direction.west
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end
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elseif a >= 0.5 and a < 1.5 then
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--NE OR SW
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if delta_x > 0 then
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return defines.direction.northeast
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else
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return defines.direction.southwest
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end
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else
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-- N or S
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if a < 0 then delta_x = - delta_x end -- mirrow x axis if player is NNW or SSE
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if delta_x > 0 then
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return defines.direction.north
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else
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return defines.direction.south
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end
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end
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end
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function walk_on_tick()
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if global.follows.n_entries > 0 then
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for k,v in pairs(global.follows) do
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local follower = Game.players[k]
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local target = Game.players[v]
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if follower ~= nil and target ~= nil then
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local d = Utils.distance(follower, target)
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if follower.connected and target.connected and d < 32 then
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if d > 5 then
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direction = get_direction(follower, target)
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follower.walking_state = {walking = true, direction = direction}
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end
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else
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global.follows[follower.name] = nil
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global.follows.n_entries = global.follows.n_entries - 1
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end
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end
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end
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end
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end
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