Struct ScenePick 

pub struct ScenePick { /* private fields */ }

Finds which mesh surface of a scene a window point, or any ray, shows, and the point of the surface’s content there: the nearest surface along the ray in the space the window’s eye stands in, or behind a doorway the ray meets first, in the spaces the eye sees.

Implementations

impl ScenePick

pub fn of(layer: &LayerNode, to_window: ProjectiveTransform) -> Option<Self>

The pick of the scene that layer shows, with to_window mapping the layer to the window; None when the layer shows no scene. Its surfaces are those the window’s eye sees.

pub fn scene(&self) -> Option<NodeId>

The node of the scene the window shows.

pub fn holds_scene(&self, layer: &LayerNode) -> bool

Whether layer shows one of this scene’s spaces, a scene behind one of its doorways, whose surfaces this pick finds.

pub fn sees_scene(&self, layer: &LayerNode) -> bool

Whether the eye sees the space of the scene layer shows, through the doorways before it.

pub fn index_of(&self, layer: &LayerNode) -> Option<usize>

The index among the scene’s surfaces of the surface layer layer.

pub fn content_point(&self, window: Point, index: usize) -> Option<Point>

The content point of surface index that the window point shows, when that surface is the nearest one there.

pub fn nearest_along(&self, ray: Ray) -> Option<(usize, SurfaceHit)>

The surface ray, in the space the window’s eye stands in, meets first, by its index, and where.

pub fn drag_point(&self, window: Point, index: usize) -> Option<Point>

The content point of surface index under the window point for a gesture that surface holds: where the ray meets it, or past its edge, where the ray meets the plane of the triangle it last met.

pub fn drag_point_along(&self, ray: Ray, index: usize) -> Option<Point>

Self::drag_point for a ray in the space the window’s eye stands in.

pub fn window_point(&self, index: usize, content: Point) -> Option<Point>

Where the content point content of surface index shows in the window, also for a surface behind a doorway; None when it lies nearer than the camera’s near plane or behind the eye.

pub fn window_point_of(&self, point: Vec3) -> Option<Point>

Where point, in the space the window’s eye stands in, shows in the window; None behind the eye.