gauges/init.lua

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-- gauges: Adds health/breath bars above players
--
-- Copyright © 2014-2019 4aiman, Hugo Locurcio and contributors - MIT License
-- See `LICENSE.md` included in the source distribution for details.
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local hp_bar = {
physical = false,
collisionbox = {x = 0, y = 0, z = 0},
visual = "sprite",
textures = {"20.png"}, -- The texture is changed later in the code
visual_size = {x = 1.5, y = 0.09375, z = 1.5}, -- Y value is (1 / 16) * 1.5
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wielder = nil,
}
function vector.sqdist(a, b)
local dx = a.x - b.x
local dy = a.y - b.y
local dz = a.z - b.z
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return dx * dx + dy * dy + dz * dz
end
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function hp_bar:on_step(dtime)
local wielder = self.wielder and minetest.get_player_by_name(self.wielder)
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if
wielder == nil or
vector.sqdist(wielder:get_pos(), self.object:get_pos()) > 3
then
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self.object:remove()
return
end
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local hp = wielder:get_hp()
local breath = wielder:get_breath()
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self.object:set_properties({
textures = {
"health_" .. tostring(hp) .. ".png^breath_" .. tostring(breath) .. ".png",
},
})
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end
minetest.register_entity("gauges:hp_bar", hp_bar)
local function add_HP_gauge(name)
local player = minetest.get_player_by_name(name)
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local pos = player:get_pos()
local ent = minetest.add_entity(pos, "gauges:hp_bar")
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if ent ~= nil then
ent:set_attach(player, "", {x = 0, y = 10, z = 0}, {x = 0, y = 0, z = 0})
ent = ent:get_luaentity()
ent.wielder = player:get_player_name()
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end
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end
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if
minetest.settings:get_bool("enable_damage") and
minetest.settings:get_bool("health_bars") ~= false
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then
minetest.register_on_joinplayer(function(player)
minetest.after(1, add_HP_gauge, player:get_player_name())
end)
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end