[Proposal] Vector Library for Erlang, backed by Bullet Physics

vector.erl

%% @doc A module for working with vectors.

-module(vector).

% -------------------------------------------------------------------------

-export([]).

-record(vector, {
    x :: float(),
    y :: float(),
    z :: float()
}).

% -------------------------------------------------------------------------
% btVector3 API
% -------------------------------------------------------------------------

%% @doc Returns the length of the vector.
-spec length(Vec :: #vector{}) -> float().
length(Vec) ->
    ok.

%% @doc Returns the length of the vector, squared.
-spec length_squared(Vec :: #vector{}) -> float().    
length_squared(Vec) ->
    ok.
    
%% @doc Return the distance between the ends of this and another vector.
%% This is symantically treating the vector like a point.
-spec distance(OtherVec :: #vector{}, ThisVec :: #vector{}) -> float().
distance(OtherVec, ThisVec) ->
    ok.

%% @doc Return the distance between the ends of this and another vector, squared. 
%% This is symantically treating the vector like a point.
-spec distance_squared(OtherVec :: #vector{}, ThisVec :: #vector{}) -> float().    
distance_squared(OtherVec, ThisVec) ->
    ok.
    
is_zero(Vec) ->
    ok.
    
fuzzy_zero(Vec) ->
    ok.
    
add(OtherVec, ThisVec) ->
    ok.
    
subtract(OtherVec, ThisVec) ->
    ok.

multiply(OtherVec, ThisVec) ->
    ok.
    
divide(OtherVec, ThisVec) ->
    ok.

is_equal(OtherVec, ThisVec) ->
    ok.
    
dot(OtherVec, ThisVec) ->
    ok.
    
normalize(Vec) ->
    ok.
    
rotate(Axis, Angle, Vec) ->
    ok.
    
angle(OtherVec, ThisVec) ->
    ok.
    
absolute(Vec) ->
    ok.
    
cross(OtherVec, ThisVec) ->
    ok.
    
triple(Vec1, Vec2, ThisVec) ->
    ok.
    
lerp(OtherVec, Ratio, ThisVec) ->
    ok.
    
max_axis(Vec) ->
    ok.
    
min_axis(Vec) ->
    ok.
    
set_max(OtherVec, ThisVec) ->
    ok.
    
set_min(OtherVec, ThisVec) ->
    ok.
    
% -------------------------------------------------------------------------