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Plane of A Curve Example

Creating several planes by specifying a previously defined circle, ellipse, and general conic.

$$
$$  Declarations
$$
    ENTITY/PT1,ELPS1,CR1,P(5),GC1,PL1,PL2,PL3
$$
$$ Geometry
$$
    PT1 =POINT/1.5,1
    ELPS1=ELLIPS/PT1,.5,.25
    CR1=CIRCLE/.5,.5,.5
    P(1) =POINT/-.5,.5
    P(2) =POINT/-.75,.7
    P(3) =POINT/-1,.8
    P(4) =POINT/-1.25,.7
    P(5) =POINT/-1.5,.5
    GC1 =GCONIC/P(1),P(2),P(3),P(4),P(5)
$$
$$ Plane Definition
$$
    PL1=PLANE/ELPS1
    PL2=PLANE/CR1
    PL3=PLANE/GC1

Planes Specified by Arcs and Conics