P1

P2

a = 0.01 (slider from 0 to 1, step 0.01)
PlaneCurve1 = CurveCartesian(1 - t, 1 - t^(2), t, 0, a)
Line = CurveCartesian(t, t, t, 0, a)
Circle = CurveCartesian(cos(t), sin(t), t, 0, ((2 * a) * π))
Astroid = CurveCartesian((1 / 4 * ((3 * cos(t)) + cos((3 * t)))), (1 / 4 * ((3 * sin(t)) - sin((3 * t)))), t, 0, ((4 * a) * π))
cubic = CurveCartesian(t^(2) - 1, (t * (t^(2) - 1)), t, -1.5, (1.5 * a))
helix = CurveCartesian(sin(t), cos(t), t, t, 0, (20 * a))
ConicalSpiral = CurveCartesian((t * cos(t)), (t * sin(t)), t, t, 0, (20 * a))
SpaceLine = CurveCartesian(t, t, t, t, 0, (10 * a))