refactor: boundary factory is now agnostic on top / bottom

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

src/js/world.js

@@ -31,7 +31,7 @@ export function makeAstronaut () {
 }
 
 /**
- * Creates a boundary at the bottom of the screen.
+ * Creates a boundary of the screen.
  *
  * @param {object} config
  * @param {number} config.x
@@ -40,7 +40,7 @@ export function makeAstronaut () {
  * @param {number} config.width
  * @returns {Shape}
  */
-export function makeBottomBoundary ({ x, y, height, width }) {
+export function makeBoundary ({ x, y, height, width }) {
   const center = Vec2(x + width / 2, y + height / 2)
   const friction = 20
   const restitution = 0

test/js/world.test.js

@@ -1,7 +1,7 @@
 import { expect } from 'chai'
 
 import { Vec2 } from '../../src/js/vector.js'
-import { makeAstronaut, makeBottomBoundary } from '../../src/js/world.js'
+import { makeAstronaut, makeBoundary } from '../../src/js/world.js'
 
 describe('World', function () {
   describe('makeAstronaut', function () {
@@ -17,7 +17,7 @@ describe('World', function () {
     })
   })
 
-  describe('makeBottomBoundary', function () {
+  describe('makeBoundary', function () {
     it('should make an immobil shape', function () {
       // Arrange
       const x = 0
@@ -26,7 +26,7 @@ describe('World', function () {
       const width = 200
 
       // Act
-      const boundary = makeBottomBoundary({ x, y, height, width })
+      const boundary = makeBoundary({ x, y, height, width })
 
       // Assert
       expect(boundary.X[0]).to.deep.equal(Vec2(x, y))

types/world.d.ts

@@ -6,7 +6,7 @@
  */
 export function makeAstronaut(): Shape;
 /**
- * Creates a boundary at the bottom of the screen.
+ * Creates a boundary of the screen.
  *
  * @param {object} config
  * @param {number} config.x
@@ -15,7 +15,7 @@ export function makeAstronaut(): Shape;
  * @param {number} config.width
  * @returns {Shape}
  */
-export function makeBottomBoundary({ x, y, height, width }: {
+export function makeBoundary({ x, y, height, width }: {
     x: number;
     y: number;
     height: number;