Struct Projection 

pub struct Projection { /* private fields */ }

Camera projection from Linkage Blaze world coordinates to pixel coordinates.

The rotation maps world axes onto camera axes: row 0 is depth, row 1 is the source of screen X, and row 2 is the source of screen Y. Named constructors provide orthographic front/top views and a perspective front view.

Use front_orthographic for a stable front camera, top_orthographic for a top camera, or front_perspective when depth should affect scale. Item3d::project and crate::Pose::project consume the result.

Implementations

impl Projection

pub const fn front_orthographic(target_origin: Point, scale: f32) -> Self

Create an orthographic front view looking along negative X. See the rendering evaluated items example.

pub const fn top_orthographic(target_origin: Point, scale: f32) -> Self

Create an orthographic top view looking along negative Z. See the rendering evaluated items example.

pub const fn front_perspective( target_origin: Point, scale: f32, focal: f32, ) -> Self

Create a perspective front view looking along negative X. See the rendering evaluated items example.

pub fn project_dir( &self, pose: Pose, world_dir: Vec3, radius: f32, ) -> (f32, f32)

Project a world-space direction, scaled by a world-space radius. See the rendering evaluated items example.

pub fn project_radius(&self, pose: Pose, radius: f32) -> f32

Convert a world-space sphere radius to pixels at a pose’s depth. See the rendering evaluated items example.

pub fn project_width(&self, width: f32) -> f32

Convert a world-space stroke width to pixels. See the rendering evaluated items example.