func BasicOperationsSpec(c gospec.Context) {
a := linear.Vec2{3, 4}
b := linear.Vec2{5, 6}
c.Specify("Make sure adding vectors works.", func() {
VecExpect(c, a.Add(b), Equals, linear.Vec2{8, 10})
})
c.Specify("Make sure subtracting vectors works.", func() {
VecExpect(c, a.Sub(b), Equals, linear.Vec2{-2, -2})
})
c.Specify("Make sure dotting vectors works.", func() {
c.Expect(a.Dot(b), IsWithin(1e-9), 39.0)
})
c.Specify("Make sure crossing vectors works.", func() {
VecExpect(c, a.Cross(), Equals, linear.Vec2{-4, 3})
})
c.Specify("Make sure taking the magnitude of vectors works.", func() {
c.Expect(a.Mag(), IsWithin(1e-9), 5.0)
c.Expect(a.Mag2(), IsWithin(1e-9), 25.0)
})
c.Specify("Make sure scaling vectors works.", func() {
VecExpect(c, a.Scale(3), Equals, linear.Vec2{9, 12})
})
}
