Struct BendFrame 

pub struct BendFrame {
    pub tau: Vector3,
    pub m: Vector3,
    pub n: Vector3,
    pub sigma: Scalar,
    pub r_a: Scalar,
    pub r_b: Scalar,
    pub cos: Scalar,
    pub sin: Scalar,
    pub center: Vector3,
}

How a bend turns, worked out from its parent flat: the frame of its first edge and its radii.

Fields

tau: Vector3

Along the parent’s edge, in the direction its loop runs it.

m: Vector3

Out of the parent, across the edge, in its plane.

n: Vector3

The parent’s normal.

sigma: Scalar

1 turning towards the B side, -1 away from it.

r_a: Scalar

The radius of its A side and of its B side.

r_b: Scalar

cos: Scalar

sin: Scalar

center: Vector3

A point on the axis.

Implementations

impl BendFrame

pub fn new( place: &Placement, [a, b]: [Vector2; 2], angle: Scalar, radius: Scalar, thickness: Scalar, toward_b: bool, ) -> GeopResult<Self>

A bend from the straight parent edge a -> b of a flat placed at place, turning by angle with inner radius radius in a sheet thickness thick.

pub fn rotate(&self, x: &Vector3) -> Vector3

The vector x turned by the bend: m towards the side it turns to, about its axis.

pub fn child_placement(&self, parent: &Placement) -> Placement

Where the child flat lies: the parent’s placement turned about the bend’s axis. Its edge where the bend ends is the parent’s where it starts, in sheet coordinates.