vector as string: vector(0.3,1.5)
vector amount: 1.530
vector direction (non-mutating): vector(0.20,0.98), amount 1.00
vector control: vector(0.3,1.5)
vector stretched (copy): vector(0.6,3.0)
vector control: vector(0.3,1.5)
vector copy stretched again (mutated): vector(1.2,6.0)
