refactor: call updateRotation from file

Signed-off-by: André Jaenisch <andre.jaenisch@posteo.de>

src/js/app.js

@@ -1,9 +1,8 @@
 import { testCollision } from './collisions.js'
-import { FPS } from './constants.js'
 import { drawShape } from './draw.js'
 import { updatePosition } from './position.js'
-import { computeNormals } from './shape.js'
-import { add, rotate, scale, Vec2 } from './vector.js'
+import { updateRotation } from './rotation.js'
+import { add, scale, Vec2 } from './vector.js'
 import { makeAstronaut, makeBoundary, makeIceCream } from './world.js'
 
 /** @typedef {import('./shape').Shape} Shape */
@@ -183,31 +182,6 @@ function update (context, shape, g) {
   updateRotation(shape)
 }
 
-/**
- * Update the rotation of the shape.
- *
- * @param {Shape} shape
- */
-function updateRotation (shape) {
-  shape.v = shape.v + shape.a * 1 / FPS
-  rotateShape(shape, shape.v * 1 / FPS)
-}
-
-/**
- * Rotate a shape around its centre.
- *
- * @param {Shape} shape
- * @param {number} angle
- */
-function rotateShape (shape, angle) {
-  shape.G = shape.G + angle
-
-  shape.X.forEach(function (vertex, index) {
-    shape.X[index] = rotate(vertex, shape.C, angle)
-    computeNormals(shape)
-  })
-}
-
 /**
  * Navigate to another scene.
  *

test/js/position.test.js

@@ -19,7 +19,9 @@ describe('Position', function () {
       // Assert
       expect(shape.C).not.to.equal(c)
       expect(shape.V).not.to.equal(v)
-      shape.X.forEach((vertex, i) => expect(vertex).not.to.equal(x[i]))
+      shape.X.forEach(function (vertex, i) {
+        expect(vertex).not.to.equal(x[i])
+      })
     })
   })
 })