Struct arcball::ArcballCamera

pub struct ArcballCamera { /* fields omitted */ }

The Shoemake Arcball camera.

Methods

impl ArcballCamera

fn new(look_at: &Matrix4<f32>,
       motion_speed: f32,
       zoom_speed: f32,
       screen: [f32; 2])
       -> ArcballCamera

Create a new Arcball camera starting from the look at matrix look_at. The motion_speed sets the speed for panning and zoom_speed the speed for zooming the camera. screen should be [screen_width, screen_height]

fn get_mat4(&self) -> Matrix4<f32>

Get the view matrix computed by the camera.

fn rotate(&mut self, mouse_prev: Vector2<f32>, mouse_cur: Vector2<f32>)

Rotate the camera, mouse positions should be in pixel coordinates.

Rotates starting from the orientation at the previous mouse position, mouse_prev, and rotating to desired orientation at the current mouse position, mouse_cur.

fn zoom(&mut self, amount: f32, elapsed: f32)

Zoom the camera in by some amount, positive values zoom in, negative zoom out.

fn pan(&mut self, mouse_delta: Vector2<f32>, elapsed: f32)

Pan the camera following the delta motion of the mouse. Mouse delta should be in pixels.

fn update_screen(&mut self, width: f32, height: f32)

Update the screen dimensions if the window has resized.