game/technic.git

Replace deprecated functions with newer ones (#510)

David Leal

2019-09-14 d5df30c3ff5ad0b9486288521abca5b517651936

commit \| author \| age
41f175	1	local constant_digit_count = technic.config:get("constant_digit_count")
H	2
	3	-- converts a number to a readable string with SI prefix, e.g. 10000 → "10 k",
	4	-- 15 → "15 ", 0.1501 → "150.1 m"
	5	-- a non-breaking space (U+a0) instead of a usual one is put after number
	6	-- The precision is 4 digits
	7	local prefixes = {[-8] = "y", [-7] = "z", [-6] = "a", [-5] = "f", [-4] = "p",
	8	[-3] = "n", [-2] = "µ", [-1] = "m", [0] = "", [1] = "k", [2] = "M",
	9	[3] = "G", [4] = "T", [5] = "P", [6] = "E", [7] = "Z", [8] = "Y"}
	10	function technic.pretty_num(num)
	11	-- the small number added is due to floating point inaccuracy
	12	local b = math.floor(math.log10(math.abs(num)) +0.000001)
	13	local pref_i
	14	if b ~= 0 then
	15	-- b is decremented by 1 to avoid a single digit with many decimals,
	16	-- e.g. instead of 1.021 MEU, 1021 kEU is shown
	17	pref_i = math.floor((b - 1) / 3)
	18	else
	19	-- as special case, avoid showing e.g. 1100 mEU instead of 1.1 EU
	20	pref_i = 0
d9bf98	21	end
41f175	22	if not prefixes[pref_i] then
H	23	-- This happens for 0, nan, inf, very big values, etc.
	24	if num == 0 then
	25	-- handle 0 explicilty to avoid showing "-0"
	26	if not constant_digit_count then
	27	return "0 "
	28	end
	29	-- gives 0.000
	30	return string.format("%.3f ", 0)
	31	end
	32	return string.format("%.4g ", num)
	33	end
	34
	35	num = num * 10 ^ (-3 * pref_i)
	36	if constant_digit_count then
	37	local comma_digits_cnt = 3 - (b - 3 * pref_i)
	38	return string.format("%." .. comma_digits_cnt .. "f %s",
	39	num, prefixes[pref_i])
	40	end
	41	return string.format("%.4g %s", num, prefixes[pref_i])
d9bf98	42	end
E	43
41f175	44	-- some unittests
H	45	assert(technic.pretty_num(-0) == "0 ")
	46	assert(technic.pretty_num(0) == "0 ")
	47	assert(technic.pretty_num(1234) == "1234 ")
	48	assert(technic.pretty_num(123456789) == "123.5 M")
85a984	49
41f175	50
H	51	-- used to display power values
	52	function technic.EU_string(num)
	53	return technic.pretty_num(num) .. "EU"
85a984	54	end
S	55
	56
	57	--- Same as minetest.swap_node, but only changes name
	58	-- and doesn't re-set if already set.
f3d8b4	59	function technic.swap_node(pos, name)
S	60	local node = minetest.get_node(pos)
	61	if node.name ~= name then
	62	node.name = name
	63	minetest.swap_node(pos, node)
	64	end
	65	end
	66
85a984	67
S	68	--- Fully charge RE chargeable item.
00d7c9	69	-- Must be defined early to reference in item definitions.
Z	70	function technic.refill_RE_charge(stack)
	71	local max_charge = technic.power_tools[stack:get_name()]
	72	if not max_charge then return stack end
	73	technic.set_RE_wear(stack, max_charge, max_charge)
	74	local meta = minetest.deserialize(stack:get_metadata()) or {}
	75	meta.charge = max_charge
	76	stack:set_metadata(minetest.serialize(meta))
	77	return stack
	78	end
0e6b3c	79
R	80
85a984	81	-- If the node is loaded, returns it. If it isn't loaded, load it and return nil.
c38da0	82	function technic.get_or_load_node(pos)
85a984	83	local node = minetest.get_node_or_nil(pos)
S	84	if node then return node end
c38da0	85	local vm = VoxelManip()
E	86	local MinEdge, MaxEdge = vm:read_from_map(pos, pos)
	87	return nil
	88	end
d9bf98	89
85a984	90
S	91	technic.tube_inject_item = pipeworks.tube_inject_item or function(pos, start_pos, velocity, item)
	92	local tubed = pipeworks.tube_item(vector.new(pos), item)
	93	tubed:get_luaentity().start_pos = vector.new(start_pos)
d5df30	94	tubed:set_velocity(velocity)
DL	95	tubed:set_acceleration(vector.new(0, 0, 0))
85a984	96	end
S	97
	98
e501c4	99	--- Iterates over the node positions along the specified ray.
S	100	-- The returned positions will not include the starting position.
85a984	101	function technic.trace_node_ray(pos, dir, range)
e501c4	102	local x_step = dir.x > 0 and 1 or -1
S	103	local y_step = dir.y > 0 and 1 or -1
	104	local z_step = dir.z > 0 and 1 or -1
85a984	105
e501c4	106	local i = 1
S	107	return function(p)
	108	-- Approximation of where we should be if we weren't rounding
	109	-- to nodes. This moves forward a bit faster then we do.
	110	-- A correction is done below.
	111	local real_x = pos.x + (dir.x * i)
	112	local real_y = pos.y + (dir.y * i)
	113	local real_z = pos.z + (dir.z * i)
85a984	114
e501c4	115	-- How far off we've gotten from where we should be.
S	116	local dx = math.abs(real_x - p.x)
	117	local dy = math.abs(real_y - p.y)
	118	local dz = math.abs(real_z - p.z)
	119
	120	-- If the real position moves ahead too fast, stop it so we
	121	-- can catch up. If it gets too far ahead it will smooth
	122	-- out our movement too much and we won't turn fast enough.
	123	if dx + dy + dz < 2 then
	124	i = i + 1
	125	end
	126
	127	-- Step in whichever direction we're most off course in.
	128	if dx > dy then
	129	if dx > dz then
85a984	130	p.x = p.x + x_step
S	131	else
	132	p.z = p.z + z_step
	133	end
e501c4	134	elseif dy > dz then
85a984	135	p.y = p.y + y_step
S	136	else
	137	p.z = p.z + z_step
	138	end
	139	if vector.distance(pos, p) > range then
	140	return nil
	141	end
	142	return p
e501c4	143	end, vector.round(pos)
85a984	144	end
S	145
1475ee	146
S	147	--- Like trace_node_ray, but includes extra positions close to the ray.
	148	function technic.trace_node_ray_fat(pos, dir, range)
	149	local x_step = dir.x > 0 and 1 or -1
	150	local y_step = dir.y > 0 and 1 or -1
	151	local z_step = dir.z > 0 and 1 or -1
	152
	153	local next_poses = {}
	154
	155	local i = 1
	156	return function(p)
	157	local ni, np = next(next_poses)
	158	if np then
	159	next_poses[ni] = nil
	160	return np
	161	end
	162
	163	-- Approximation of where we should be if we weren't rounding
	164	-- to nodes. This moves forward a bit faster then we do.
	165	-- A correction is done below.
	166	local real_x = pos.x + (dir.x * i)
	167	local real_y = pos.y + (dir.y * i)
	168	local real_z = pos.z + (dir.z * i)
	169
	170	-- How far off we've gotten from where we should be.
	171	local dx = math.abs(real_x - p.x)
	172	local dy = math.abs(real_y - p.y)
	173	local dz = math.abs(real_z - p.z)
	174
	175	-- If the real position moves ahead too fast, stop it so we
	176	-- can catch up. If it gets too far ahead it will smooth
	177	-- out our movement too much and we won't turn fast enough.
	178	if dx + dy + dz < 2 then
	179	i = i + 1
	180	end
	181
	182	-- Step in whichever direction we're most off course in.
	183	local sx, sy, sz -- Whether we've already stepped along each axis
	184	if dx > dy then
	185	if dx > dz then
	186	sx = true
	187	p.x = p.x + x_step
	188	else
	189	sz = true
	190	p.z = p.z + z_step
	191	end
	192	elseif dy > dz then
	193	sy = true
	194	p.y = p.y + y_step
	195	else
	196	sz = true
	197	p.z = p.z + z_step
	198	end
	199
	200	if vector.distance(pos, p) > range then
	201	return nil
	202	end
	203
	204	-- Add other positions that we're significantly off on.
	205	-- We can just use fixed integer keys here because the
	206	-- table will be completely cleared before we reach this
	207	-- code block again.
	208	local dlen = math.sqrt(dxdx + dydy + dz*dz)
	209	-- Normalized axis deltas
	210	local dxn, dyn, dzn = dx / dlen, dy / dlen, dz / dlen
	211	if not sx and dxn > 0.5 then
	212	next_poses[1] = vector.new(p.x + x_step, p.y, p.z)
	213	end
	214	if not sy and dyn > 0.5 then
	215	next_poses[2] = vector.new(p.x, p.y + y_step, p.z)
	216	end
	217	if not sz and dzn > 0.5 then
	218	next_poses[3] = vector.new(p.x, p.y, p.z + z_step)
	219	end
	220
	221	return p
	222	end, vector.round(pos)
	223	end