Struct Frame 

pub struct Frame {
    pub origin: Point3,
    pub x: Vec3,
    pub y: Vec3,
}

An orthonormal frame at a point on a path.

A sweep needs a full frame, not just a tangent: the profile’s x and y axes have to be carried along the path, and how they are carried is exactly what distinguishes the sweep families from each other.

Fields

origin: Point3

Frame origin on the directrix.

x: Vec3

Image of the profile’s +x.

y: Vec3

Image of the profile’s +y.

Implementations

impl Frame

pub fn from_reference( origin: Point3, tangent: Vec3, reference: Vec3, ) -> GeomResult<Self>

Frame whose z is tangent and whose x is reference made perpendicular to it.

Refuses a reference parallel to the tangent instead of silently picking a fallback axis: the caller supplied a direction that cannot orient the profile, and quietly substituting one rotates the section by an arbitrary angle.