Added matrix composition and decompositions

This commit adds matrix composition and decompositions (untested),
it also adds another playground to test that this is working as
expected in every case.

We also fixed a few linting errors.

1 files changed, 1 insertions, 16 deletions

diff --git a/src/helpers.js b/src/helpers.js
index 16e6e4e..5a15bf9 100644
--- a/src/helpers.js
+++ b/src/helpers.js
@@ -209,21 +209,6 @@ function idFromReference (url) {
 // Create matrix array for looping
 var abcdef = 'abcdef'.split('')
 
-// Gets the distance of a point (a, b) from the origin
-function mag (a, b) {
-  return Math.sqrt(a * a + b * b)
-}
-
-// Given a coordinate (a, b), this will calculate the sin, cosine and angle
-// of this point projected onto the unit circle directly
-function unitCircle (a, b) {
-  var thetaRad = Math.atan2(b, a)
-  var thetaDeg = thetaRad * 180 / Math.PI
-  var cos = Math.cos(thetaRad)
-  var sin = Math.sin(thetaRad)
-  return {theta: thetaDeg, cos: cos, sin: sin}
-}
-
 function closeEnough (a, b, threshold) {
-  return Math.abs (b - a) < (threshold || 1e-6)
+  return Math.abs(b - a) < (threshold || 1e-6)
 }