Enum ViewFrame 

pub enum ViewFrame {
    World,
    Board,
}

Which way the NAMED views face: the frame the standard-view table and the ViewCube’s labelled faces are read in, carried into the world by a rotation.

The table is written once, Y-up (FRONT on +Z, TOP on +Y), which is how a modelled part is drawn. A PCB is not: the board is built Z-up — F.Cu’s plane at z = 0, the parts standing on +Z, the layout’s +Y-down read as world −Y (engine_state::board_geometry). Read in the Y-up frame, TOP shows the board’s 1.6 mm edge and FRONT its component side (eCAD third audit, B5).

The board is NOT turned to suit the viewer, because its world coordinates are what STEP export writes, what the parts’ placements are written in and what locate reports; it is the names that turn. So a view is a direction in the frame, and Self::to_world is the one place the frame is applied — by the standard views and by the ViewCube alike, so the cube’s T face is the one the TOP view looks at.

Variants

World

Y-up: the world itself. Every document without a board.

Board

Z-up, for a document that shows a board: frame +X → world +X (the layout’s right), frame +Y (TOP) → world +Z (the component side), frame +Z (FRONT) → world −Y (the layout’s bottom edge, the one nearest the reader in the 2D board view). A +90° turn about X, so it is a proper rotation and the ViewCube’s letters stay unmirrored.

TOP then looks down with world +Y up, which is the 2D board view’s own orientation. BOTTOM is the Y-up table’s BOTTOM carried over (up = frame +Z = world −Y): the physical underside, as if the board were tipped towards the reader over its front edge, NOT the left-right mirror a 2D editor’s “flip board” shows.

Implementations

impl ViewFrame

pub fn to_world(self, v: [f64; 3]) -> [f64; 3]

A frame direction in world coordinates.

pub fn from_world(self, v: [f64; 3]) -> [f64; 3]

A world direction in frame coordinates — the inverse of Self::to_world.

Trait Implementations

impl Clone for ViewFrame

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for ViewFrame

impl Debug for ViewFrame

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for ViewFrame

fn default() -> Self

Returns the “default value” for a type.

impl Eq for ViewFrame

impl PartialEq for ViewFrame

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for ViewFrame