Curve Representations

• Explicit: y = y(x)

• • must be a function (single-valued): big limitation

• Parametric: (x,y) = (x(u),y(u))

• • easy to specify, modify, control
  • extra “hidden” variable u, the parameter

• Implicit: f(x,y) = 0

• • y can be multiple valued function of x
  • hard to specify, modify, control

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