Minetest-WorldEditAdditions/worldeditadditions_commands/commands/measure/mtrig.lua

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local wea = worldeditadditions
local v3 = worldeditadditions.Vector3
worldeditadditions_core.register_command("mtrig", {
	params = "",
	description = "Return the length of and angles of an imginary line between pos1 and pos2 in the selection.",
	privs = { worldedit = true },
	require_pos = 2,
	parse = function(params_text)
		return true
	end,
	func = function(name, params_text)
		local str = "The measurements of the line from pos1 to pos2 are Length (D): "
		local vec = v3.subtract(worldedit.pos2[name],worldedit.pos1[name]):abs()
		local len = vec:length()
		str = str..wea.round(len, 4)..", ∠XZ: "..
			wea.round(math.deg(math.atan(vec.z/vec.x)), 4).."°, ∠DY: "..
			wea.round(math.deg(math.asin(vec.y/len)), 4).."°"
		return true, str
	end,
})