🚧 Working on rendering

tests/utils.test.js

@@ -0,0 +1,77 @@
+var expect = require('chai').expect;
+var Point = require('../dist/lib/point').Point;
+var utils = require('../dist/lib/utils');
+
+it('should round a value', () => {
+  expect(utils.round(1.2345)).to.equal(1.23);
+  expect(utils.round(-9.876)).to.equal(-9.88);
+  expect(utils.round(12)).to.equal(12);
+});
+
+it('should convert radians to degrees', () => {
+  expect(utils.rad2deg(Math.PI/2)).to.equal(90);
+  expect(utils.rad2deg(Math.PI)).to.equal(180);
+  expect(utils.rad2deg(Math.PI*2)).to.equal(360);
+});
+
+it('should convert degrees to radians', () => {
+  expect(utils.deg2rad(90)).to.equal(Math.PI/2);
+  expect(utils.deg2rad(180)).to.equal(Math.PI);
+  expect(utils.deg2rad(360)).to.equal(Math.PI*2);
+});
+
+it('should return a line intersection', () => {
+  let a = new Point(-10,-10);
+  let b = new Point(10,-10);
+  let c = new Point(10,10);
+  let d = new Point(-10,10);
+  let result = utils.beamsCross(a,c,b,d);
+  expect(result.x).to.equal(0);
+  expect(result.y).to.equal(0);
+  expect(utils.beamsCross(a,b,c,d)).to.be.false;
+
+  // Debug
+  let e = new Point(0,0);
+  let f = new Point(25,25);
+  let g = new Point(0,60);
+  let h = new Point(25,35);
+  // Should be 30,30, but is 30,0
+  console.log(utils.beamsCross(e,f,g,h));
+        //$p->newPoint(2,25,25);
+        //$p->newPoint(3,0,60);
+        //$p->newPoint(4,25,35);
+        //$this->assertFalse($p->linesCross(1,2,3,4));
+        //$this->assertFalse($p->beamsCross(1,3,2,4));
+        //
+        //$expect = new \Freesewing\Point();
+        //$expect->setX(30);
+        //$expect->setY(30);
+        //$this->assertEquals($p->beamsCross(1,2,3,4), $expect);
+        //
+        //$p->newPoint(4,10,-10);
+        //$expect->setX(7.5);
+        //$expect->setY(7.5);
+        //$this->assertEquals($p->linesCross(1,2,3,4), $expect);
+  //
+});
+
+it('should return a line segment intersection', () => {
+  let a = new Point(-10,-10);
+  let b = new Point(10,-10);
+  let c = new Point(10,10);
+  let d = new Point(-10,10);
+  let result = utils.linesCross(a,c,b,d);
+  expect(result.x).to.equal(0);
+  expect(result.y).to.equal(0);
+  expect(utils.linesCross(a,b,c,d)).to.be.false;
+  let e = new Point(5,-5);
+  expect(utils.linesCross(a,b,c,e)).to.be.false;
+
+  let f = new Point(1,10);
+  let g = new Point(0,49);
+  let h = new Point(-20,40);
+  let i = new Point(20,40);
+  console.log(utils.beamsCross(g,f,h,i));
+
+});
+