261 lines
8.4 KiB
Lua
261 lines
8.4 KiB
Lua
local S = minetest.get_translator("screwdriver2")
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if not minetest.raycast then
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minetest.log("error", "screwdriver2 requires minetest version 5.0 or newer")
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return
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end
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screwdriver2 = {}
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local function rotate_simple(_, _, _, _, new_param2)
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if new_param2 % 32 > 3 then return false end
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end
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-- If the screwdriver mod is not installed, create a fake screwdriver variable.
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-- (This mod has an optional dependancy on screwdriver, so minetest loads screwdriver first if it exists.)
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-- - Some mods will only set on_rotate when `screwdriver` exists.
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-- - Mods may expect `screwdiver` to exist if `on_rotate` is called.
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if not minetest.global_exists("screwdriver") then
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screwdriver = {
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ROTATE_FACE = 1,
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ROTATE_AXIS = 2,
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rotate_simple = rotate_simple,
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disallow = false, -- I doubt anyone actually used screwdriver.disallow but whatever.
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}
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end
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local get_pointed = dofile(minetest.get_modpath("screwdriver2").."/pointed.lua")
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-- Functions to choose rotation based on pointed location
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local insanity_2 = {xy = 1, yz = 1, zx = 1; zy = -1, yx = -1, xz = -1} -- Don't worry about this
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local function push_edge(normal, point)
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local biggest = 0
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local biggest_axis
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local normal_axis
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-- Find the normal axis, and the axis of the with the
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-- greatest magnitude (other than the normal axis)
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for axis in pairs(point) do
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if normal[axis] ~= 0 then
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normal_axis = axis
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elseif math.abs(point[axis])>biggest then
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biggest = math.abs(point[axis])
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biggest_axis = axis
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end
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end
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-- Find the third axis, which is the one to rotate around
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if normal_axis and biggest_axis then
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for axis in pairs(point) do
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if axis ~= normal_axis and axis ~= biggest_axis then
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-- Decide which direction to rotate (+ or -)
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return axis, insanity_2[normal_axis..biggest_axis] * math.sign(normal[normal_axis] * point[biggest_axis])
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end
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end
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end
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return "y", 0
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end
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local function rotate_face(normal, _)
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-- Find the normal axis
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for axis, value in pairs(normal) do
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if value ~= 0 then
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return axis, math.sign(value)
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end
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end
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return "y", 0
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end
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-- Numbers taken from https://forum.minetest.net/viewtopic.php?p=73195#p73195
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-- "How to rotate (clockwise) by axis from any facedir:"
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-- "(this will be made into a lua function)"
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-- 5 years later...
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local facedir_cycles = {
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x = {{12,13,14,15},{16,19,18,17},{ 0, 4,22, 8},{ 1, 5,23, 9},{ 2, 6,20,10},{ 3, 7,21,11}},
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y = {{ 0, 1, 2, 3},{20,23,22,21},{ 4,13,10,19},{ 8,17, 6,15},{12, 9,18, 7},{16, 5,14,11}},
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z = {{ 4, 5, 6, 7},{ 8,11,10, 9},{ 0,16,20,12},{ 1,17,21,13},{ 2,18,22,14},{ 3,19,23,15}},
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}
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local wallmounted_cycles = {
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x = {0, 4, 1, 5},
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y = {4, 2, 5, 3},
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z = {0, 3, 1, 2},
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}
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-- Functions to rotate a facedir/wallmounted value around an axis by a certain amount
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local rotate = {
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-- Facedir: lower 5 bits used for direction, 0 - 23
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facedir = function(param2, axis, amount)
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local facedir = param2 % 32
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for _, cycle in ipairs(facedir_cycles[axis]) do
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-- Find the current facedir
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-- Minetest adds table.indexof, but I refuse to use it because it returns -1 rather than nil
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for i, fd in ipairs(cycle) do
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if fd == facedir then
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return param2 - facedir + cycle[1+(i-1 + amount) % 4] -- If only Lua didn't use 1 indexing...
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end
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end
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end
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return param2
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end,
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-- Wallmounted: lower 3 bits used, 0 - 5
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wallmounted = function(param2, axis, amount)
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local wallmounted = param2 % 8
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for i, wm in ipairs(wallmounted_cycles[axis]) do
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if wm == wallmounted then
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return param2 - wallmounted + wallmounted_cycles[axis][1+(i-1 + amount) % 4]
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end
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end
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return param2
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end
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}
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rotate.colorfacedir = rotate.facedir
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rotate.colorwallmounted = rotate.wallmounted
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local function rect(angle, radius)
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return math.cos(2*math.pi * angle) * radius, math.sin(2*math.pi * angle) * radius
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end
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-- Generate the screwdriver particle effects
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local other_axes = {x = {"y","z"}, y = {"z","x"}, z = {"x","y"}}
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local function particle_ring(pos, axis, direction)
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local axis2, axis3 = unpack(other_axes[axis])
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local particle_pos = vector.new()
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local particle_vel = vector.new()
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for i = 0, 0.999, 1/6 do
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particle_pos[axis3], particle_pos[axis2] = rect(i, 0.5^0.5)
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particle_vel[axis3], particle_vel[axis2] = rect(i - 1/4 * direction, 2)
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minetest.add_particle({
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pos = vector.add(pos, particle_pos),
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velocity = particle_vel,
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acceleration = vector.multiply(particle_pos, -7),
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expirationtime = 0.25,
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size = 2,
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texture = "screwdriver2.png",
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})
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end
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end
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-- Main
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-- Idea: split this into 2 functions
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-- 1: on_use parameters -> axis/amount/etc.
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-- 2: param2/axis/amount/etc. -> new param2
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function screwdriver.use(itemstack, player, pointed_thing, is_right_click)
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if lzr_gamestate.get_state() == lzr_gamestate.LEVEL_COMPLETE then
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return
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end
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if pointed_thing.type ~= "node" then return end
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local pos = pointed_thing.under
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-- Check protection
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local player_name = player:get_player_name()
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if minetest.is_protected(pos, player_name) then
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minetest.record_protection_violation(pos, player_name)
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return
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end
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-- Get node info
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local node = minetest.get_node_or_nil(pos)
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if not node then return end
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local def = minetest.registered_nodes[node.name]
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if not def then return end -- probably unnessesary
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local rotatable = minetest.get_item_group(node.name, "rotatable")
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local gs = lzr_gamestate.get_state()
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-- Node MUST have 'rotatable' group
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-- TODO: Allow rotation in level editing/admin mode
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if rotatable <= 0 then
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return itemstack
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end
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-- rotatable=2: rotatable if takable or if in editor/menu mode
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if rotatable == 2 then
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if not (minetest.get_item_group(node.name, "takable") == 1 or (gs == lzr_gamestate.EDITOR or gs == lzr_gamestate.MENU)) then
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return itemstack
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end
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-- rotatable=3: rotatable in editor/menu mode only
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elseif rotatable == 3 then
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if not (gs == lzr_gamestate.EDITOR or gs == lzr_gamestate.MENU) then
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return itemstack
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end
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end
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local on_rotate = def.on_rotate
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if on_rotate == false then return end
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-- Choose rotation function based on paramtype2 (facedir/wallmounted)
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local rotate_function = rotate[def.paramtype2]
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if not rotate_function then return end
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-- Choose rotation axis/direction and param2 based on click type and pointed location
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local axis, amount
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local normal, point = get_pointed(player, pointed_thing)
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if not normal or vector.length(normal) == 0 then return end -- Raycast failed or player is inside selection box
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local control = player:get_player_control()
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if is_right_click then
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axis, amount = rotate_face(normal, point)
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else
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axis, amount = push_edge(normal, point)
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end
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if control.sneak then
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amount = -amount
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end
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local new_param2 = rotate_function(node.param2, axis, amount)
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-- Calculate particle position
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local particle_offset = vector.new()
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particle_offset[axis] = point[axis]--math.sign(normal[axis]) * 0.5
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-- Handle node's on_rotate function
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local handled
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if type(on_rotate) == "function" then
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-- If a mod is loaded after screwdriver but before screwdriver2,
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-- it will still end up using the old `rotate_simple` function.
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-- So, we'll check that here, and override it in that case.
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if on_rotate == screwdriver.rotate_simple then on_rotate = rotate_simple end
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local result = on_rotate(
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vector.new(pos),
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table.copy(node),
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player,
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is_right_click and 2 or 1, -- Deprecated
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new_param2,
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-- New:
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axis, -- "x", "y", or "z"
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amount, -- 90 degrees = 1, etc.
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rotate_function -- function(node.param2, axis, amount) -> new_param2
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)
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if result == false then
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return
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elseif result == true then
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handled = true
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end
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end
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-- Draw particles (TODO: check if rotation was actually done)
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particle_ring(vector.add(pos, particle_offset), axis, amount)
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-- Play sound
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if def.sounds and def.sounds._rotate then
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minetest.sound_play(def.sounds._rotate, {pos=pos}, true)
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else
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minetest.sound_play({name="screwdriver2_rotate", gain=1}, {pos=pos}, true)
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end
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-- Replace node
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if not handled then
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if new_param2 == node.param2 then return end -- no rotation was done
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node.param2 = new_param2
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minetest.swap_node(pos, node)
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end
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minetest.check_for_falling(pos)
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if def._after_rotate then def._after_rotate(pos) end
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end
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minetest.register_tool("screwdriver2:screwdriver",{
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description = S("Rotating Hook").."\n"..S("Punch to push edge, place to rotate face"),
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inventory_image = "screwdriver2.png",
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on_use = function(itemstack, player, pointed_thing)
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return screwdriver.use(itemstack, player, pointed_thing, false)
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end,
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on_place = function(itemstack, player, pointed_thing)
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return screwdriver.use(itemstack, player, pointed_thing, true)
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end,
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})
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