Struct First

pub struct First<N: Copy + RealField> { /* private fields */ }

First person view induced by displacement on screen.

Implements Default and can be created with First::default().

All methods except Self::enabled() must be invoked on matching events fired by your 3D graphics library of choice.

Implementations

impl<N: Copy + RealField> First<N>

pub fn capture(&mut self, yaw_axis: Unit<Vector3<N>>)

Captures current yaw axis when entering first person view.

pub fn compute( &self, vec: &Vector2<N>, max: &Point2<N>, ) -> Option<(N, N, &Unit<Vector3<N>>)>

Computes pitch and yaw from cursor/finger displacement vector in screen space.

Carries cursor/finger displacements to arcs of the same length on great circles of an eye-centered trackball with radius of maximum of half the screen’s width and height in compliance with crate::Orbit except that its trackball is target-centered.

pub fn discard(&mut self)

Discards captured yaw axis when leaving first person view.

pub const fn enabled(&self) -> bool

Whether a yaw axis has been captured.

pub const fn yaw_axis(&self) -> Option<&Unit<Vector3<N>>>

Captured yaw axis.

pub fn cast<M: Copy + RealField>(self) -> First<M>

where N: SubsetOf<M>,

Casts components to another type, e.g., between f32 and f64.

Trait Implementations

impl<N: Clone + Copy + RealField> Clone for First<N>

fn clone(&self) -> First<N>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<N: Debug + Copy + RealField> Debug for First<N>

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

Formats the value using the given formatter.

impl<N: Default + Copy + RealField> Default for First<N>

fn default() -> First<N>

Returns the “default value” for a type.