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Complete rework of curve/tee rail direction functions

This commit is contained in:
teknomunk 2024-04-28 06:58:42 +00:00
parent 2891807a0f
commit 1370cf7863
1 changed files with 17 additions and 58 deletions
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75
mods/ENTITIES/mcl_minecarts/rails.lua
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@ -45,77 +45,36 @@ local function rail_dir_sloped(pos, dir, node)
return downhill
end
end
-- Fourdir
-- Fourdir to cardinal direction
-- 0 = north
-- 1 = east
-- 2 = south
-- 3 = west
local CURVE_RAIL_DIRS = { [0] = 1, 1, 2, 2, }
local function rail_dir_curve(pos, dir, node)
-- This takes a table `dirs` that has one element for each cardinal direction
-- and which specifies the direction for a cart to continue in when entering
-- a rail node in the direction of the cardinal. This function takes node
-- rotations into account.
local function rail_dir_from_table(pos, dir, node, dirs)
dir = vector.new(dir.x, 0, dir.z)
local dir_fourdir = (minetest.dir_to_fourdir(dir) - node.param2 + 4) % 4
local new_fourdir = (CURVE_RAIL_DIRS[dir_fourdir] + node.param2) % 4
local new_fourdir = (dirs[dir_fourdir] + node.param2) % 4
return minetest.fourdir_to_dir(new_fourdir)
end
local CURVE_RAIL_DIRS = { [0] = 1, 1, 2, 2, }
local function rail_dir_curve(pos, dir, node)
return rail_dir_from_table(pos, dir, node, CURVE_RAIL_DIRS)
end
local function rail_dir_tee_off(pos, dir, node)
dir = vector.new(dir.x, 0, dir.z)
if node.param2 == 0 then -- north
-- South and East
if vector.equals(dir, south) then return south end
if vector.equals(dir, north) then return east end
if vector.equals(dir, west) then return south end
if vector.equals(dir, east) then return east end
elseif node.param2 == 1 then -- east
-- South and West
if vector.equals(dir, south) then return south end
if vector.equals(dir, north) then return west end
if vector.equals(dir, west) then return west end
if vector.equals(dir, east) then return south end
elseif node.param2 == 2 then
-- North and West
if vector.equals(dir, south) then return west end
if vector.equals(dir, north) then return north end
if vector.equals(dir, west) then return west end
if vector.equals(dir, east) then return north end
elseif node.param2 == 3 then
-- North and East
if vector.equals(dir, south) then return east end
if vector.equals(dir, north) then return north end
if vector.equals(dir, west) then return north end
if vector.equals(dir, east) then return east end
end
return rail_dir_from_table(pos, dir, node, CURVE_RAIL_DIRS)
end
local TEE_RAIL_ON_DIRS = { [0] = 0, 1, 1, 0 }
local function rail_dir_tee_on(pos, dir, node)
dir = vector.new(dir.x, 0, dir.z)
if node.param2 == 0 then -- north
-- South and East
if vector.equals(dir, south) then return east end
if vector.equals(dir, north) then return north end
if vector.equals(dir, west) then return north end
if vector.equals(dir, east) then return east end
elseif node.param2 == 1 then -- east
-- South and West
if vector.equals(dir, south) then return south end
if vector.equals(dir, north) then return east end
if vector.equals(dir, west) then return south end
if vector.equals(dir, east) then return east end
elseif node.param2 == 2 then
-- North and West
if vector.equals(dir, south) then return south end
if vector.equals(dir, north) then return west end
if vector.equals(dir, west) then return west end
if vector.equals(dir, east) then return south end
elseif node.param2 == 3 then
-- North and East
if vector.equals(dir, south) then return west end
if vector.equals(dir, north) then return north end
if vector.equals(dir, west) then return west end
if vector.equals(dir, east) then return north end
end
return rail_dir_from_table(pos, dir, node, TEE_RAIL_ON_DIRS)
end
local function rail_dir_cross(pos, dir, node)
dir = vector.new(dir.x, 0, dir.z)