describe("Matrix methods", function () { it("Matrix.add - matrix", function() { var matrix1 = new Snap.Matrix(1, 0, 0, 1, 5, 5); var matrix2 = new Snap.Matrix(1, 0, 0, 1, 10, 10); var result = matrix1.add(matrix2); expect(result).to.eql({ a: 1, b: 0, c: 0, d: 1, e: 15, f: 15 }); // add two 90 degree rotations var matrix3 = new Snap.Matrix(0, 1, -1, 0, 0, 0); var matrix4 = new Snap.Matrix(0, 1, -1, 0, 0, 0); result = matrix3.add(matrix4); expect(result).to.eql({ a: -1, b: 0, c: 0, d: -1, e: 0, f: 0 }); }); it("Matrix.add - numbers", function() { var matrix1 = new Snap.Matrix(1, 0, 0, 1, 5, 5); var result = matrix1.add(1, 0, 0, 1, 10, 10); expect(result).to.eql({ a: 1, b: 0, c: 0, d: 1, e: 15, f: 15 }); }); it("Matrix.clone", function() { var matrix1 = new Snap.Matrix(1, 2, 3, 4, 5, 6); var clone = matrix1.clone(); expect(clone).to.not.be(matrix1); expect(clone).to.eql({ a: 1, b: 2, c: 3, d: 4, e: 5, f: 6 }); }); it("Matrix.invert", function() { var matrix1 = new Snap.Matrix(1, 2, 3, 4, 5, 6); var inverse = matrix1.invert(); expect(inverse).to.eql({ a: -2, b: 1, c: 1.5, d: -0.5, e: 1, f: -2 }); }); it("Matrix.rotate", function() { var matrix = new Snap.Matrix(1, 0, 0, 1, 0, 0); matrix.rotate(45, 0, 0); expect(+matrix.a.toFixed(3)).to.be(0.707); expect(+matrix.b.toFixed(3)).to.be(0.707); expect(+matrix.c.toFixed(3)).to.be(-0.707); expect(+matrix.d.toFixed(3)).to.be(0.707); expect(+matrix.e.toFixed(3)).to.be(0); expect(+matrix.f.toFixed(3)).to.be(0); }); it("Matrix.scale - x", function() { var matrix = new Snap.Matrix(1, 0, 0, 1, 20, 30); matrix.scale(2); expect(matrix).to.eql({ a: 2, b: 0, c: 0, d: 2, e: 20, f: 30 }); matrix.scale(0.5); expect(matrix).to.eql({ a: 1, b: 0, c: 0, d: 1, e: 20, f: 30 }); }); it("Matrix.scale - x, y", function() { var matrix = new Snap.Matrix(1, 0, 0, 1, 20, 30); matrix.scale(2, 3); expect(matrix).to.eql({ a: 2, b: 0, c: 0, d: 3, e: 20, f: 30 }); matrix.scale(0.5, 1); expect(matrix).to.eql({ a: 1, b: 0, c: 0, d: 3, e: 20, f: 30 }); }); it("Matrix.scale - x, y, cx, cy", function() { var matrix = new Snap.Matrix(1, 0, 0, 1, 20, 30); matrix.scale(2, 3, 5, -5); expect(matrix).to.eql({ a: 2, b: 0, c: 0, d: 3, e: 15, f: 40 }); }); it("Matrix.split", function() { var matrix = new Snap.Matrix(1, 0, 0, 1, 0, 0); var result = matrix.split(); expect(result.dx).to.be(0); expect(result.dy).to.be(0); expect(result.scalex).to.be(1); expect(result.scaley).to.be(1); expect(result.shear).to.be(0); expect(result.rotate).to.be(0); expect(result.isSimple).to.be(true); matrix = new Snap.Matrix(1.5, 0, 0, 0.5, 20, 25); result = matrix.split(); expect(result.dx).to.be(20); expect(result.dy).to.be(25); expect(result.scalex).to.be(1.5); expect(result.scaley).to.be(0.5); expect(result.shear).to.be(0); expect(result.rotate).to.be(0); expect(result.isSimple).to.be(true); }); it("Matrix.toTransformString", function() { var matrix = new Snap.Matrix(1.5, 0, 0, 0.5, 20, 25); var str = matrix.toTransformString(); var s = Snap(10, 10); var rect = s.rect(0, 0, 10, 20); rect.transform(str); var transform = rect.transform(); expect(transform.localMatrix).to.eql({ a: 1.5, b: 0, c: 0, d: 0.5, e: 20, f: 25 }); }); it("Matrix.translate", function() { var matrix = new Snap.Matrix(1, 0, 0, 1, 20, 30); matrix.translate(10, -10); expect(matrix).to.eql({ a: 1, b: 0, c: 0, d: 1, e: 30, f: 20 }); matrix.translate(-1, -2); expect(matrix).to.eql({ a: 1, b: 0, c: 0, d: 1, e: 29, f: 18 }); }); it("Matrix.x", function() { var matrix = new Snap.Matrix(1, 0, 0, 1, 20, 30); var result = matrix.x(10, -10); expect(result).to.be(30); }); it("Matrix.y", function() { var matrix = new Snap.Matrix(1, 0, 0, 1, 20, 30); var result = matrix.y(10, -10); expect(result).to.be(20); }); });