Examples:
- let aSurface(Surface)
aSurface = NULL /* always initialize a variable */
... /* assign a value to aSurface or not */
if (aSurface <> NULL) /* in order not to reset Surface.1’s
geometry if aSurface has not been assigned any value */
`Geometrical Set.1\Surface.1` = aSurface
- let aPlane(Plane)
aPlane = NULL /* always initialize a variable */
... /* assign a value to aPlane or not */
if (aPlane <> NULL) /* in order not to reset Plane.1’s geometry
if aPlane has not been assigned any value */
`Geometrical Set.1\Plane.1` = aPlane
- let aCurve(Curve)
aCurve = NULL /* always initialize a variable */
... /* assign a value to aCurve or not */
if (aCurve <> NULL) /* in order not to reset Curve.1’s geometry
if aCurve has not been assigned any value */
`Geometrical Set.1\Curve.1` = aCurve
- let aCircle(Circle)
aCircle = NULL /* always initialize a variable */
... /* assign a value to aCircle or not */
if (aCircle <> NULL) /* in order not to reset Circle.1’s
geometry if aCircle has not been assigned any value */
`Geometrical Set.1\Circle.1` = aCircle
- let aLine(Line)
aLine = NULL /* always initialize a variable */
... /* assign a value to aLine or not */
if (aLine <> NULL) /* in order not to reset Line.1’s geometry if
aLine has not been assigned any value */
`Geometrical Set.1\Line.1` = aLine
- let aPoint(Point)
aPoint = NULL /* always initialize a variable */
... /* assign a value to aPoint or not */
if (aPoint <> NULL) /* in order not to reset Point.1’s geometry
if aPoint has not been assigned any value */
`Geometrical Set.1\Point.1` = aPoint
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