A Clojure library for performing calculations suitable for 3D games using fast, immutable data structures.

Euclidean is written in pure Clojure, but has performance comparable to vector libraries written in Java, such as Vectorz.

Add the following dependency to your project.clj file:

[euclidean "0.2.0"]

Euclidean provides two namespaces, one for constructing vectors, the other for quaternions:

(require '[euclidean.math.vector :as v])
(require '[euclidean.math.quaternion :as q])

The library includes data readers for 2D and 3D vectors, and 4D quaternions:

#math/vector [1 2]          ;; 2D vector
#math/vector [1 2 3]        ;; 3D vector
#math/quaternion [0 0 0 1]  ;; Quaternion

But you can also create data structures through various contructor functions:

(v/vector 1 2)
(v/vector 1 2 3)
(v/into-vector [1 2])
(v/into-vector [1 2 3])

(q/quaternion 0 0 0 1)
(q/into-quaternion [0 0 0 1])

These data structures implement standard Clojure interfaces, so you can use functions like get, count and seq on them:

(def v (v/vector 1 2 3))

(get v 0)            ;; => 1.0
(v 1)                ;; => 2.0
(count v)            ;; => 3
(seq v)              ;; => (1.0 2.0 3.0)
(= v [1.0 2.0 3.0])  ;; => true

Note how the numbers in the vector are stored as doubles. This is for performance purposes.

Euclidean provides a number of additional functions for manipulating and creating vectors and quaternions. For a full list, see the API documentation linked below.

• API Docs

Copyright © 2013 James Reeves

Distributed under the Eclipse Public License, the same as Clojure.