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Create Ruled Surface Example

Creating a ruled B-surface type body where no reference point has been specified. The ruling process starts from the start of each curve. In this case, this causes the body to be twisted.

$$
$$ Declarations
$$
    ENTITY/PT1,P(4),SPLN1,LN1,RSRF1
$$
$$ Geometry Definition
$$
    PT1=POINT/-1,-1
    P(1)=POINT/-1,0
    P(2)=POINT/-.5,.25,.25
    P(3)=POINT/.5,-.25,-.25
    P(4)=POINT/1,0
    SPLN1=SPLINE/P
    LN1=LINE/1,-1,-1,-1
$$
$$ Body Definition
$$
    RSRF1=RLDSRF/SPLN1,,LN1

Ruled B-surface Type Body Not Using a Reference Point

NOTE: In the two previous examples, a reference point for the first curve was not needed, therefore, two commas were placed between the first and second curves.