Struct PosLookat

pub struct PosLookat {
    pub position: Point3<f32>,
    pub lookat: Point3<f32>,
    pub up: Vector3<f32>,
}

Component usually used on camera or lights. Defines a position and a lookat. This can be used to convert to a view_matrix

Fields

position: Point3<f32>

lookat: Point3<f32>

up: Vector3<f32>

Implementations

impl PosLookat

pub fn new(position: Point3<f32>, lookat: Point3<f32>) -> Self

pub fn new_from_model_matrix( model_matrix: SimilarityMatrix3<f32>, dist_lookat: f32, ) -> Self

Initializes from a model matrix and a distance to lookat. Assumes the up vector is (0,1,0)

pub fn view_matrix(&self) -> Matrix4<f32>

Get view matrix as a mat4x4. View matrix maps from world to camera coordinates

pub fn view_matrix_isometry(&self) -> IsometryMatrix3<f32>

Get view matrix as a isometry matrix. View matrix maps from world to camera coordinates. Isometry matrix allows for faster inverse than a mat4x4.

pub fn direction(&self) -> Vector3<f32>

Direction in which we are looking at in world coordinates

pub fn model_matrix_isometry(&self) -> IsometryMatrix3<f32>

Get model_matrix as a isometry matrix. Model matrix maps from camera coordinates to world coordinates. Isometry matrix allows for faster inverse than a mat4x4

pub fn model_matrix(&self) -> Matrix4<f32>

Get model_matrix matrix as a isometry matrix. Model matrix maps from camera coordinates to world coordinates.

pub fn cam_axes(&self) -> Matrix3<f32>

Cam axes as columns of a 3x3 matrix. The columns represent a right handed coordinate system where x is towards right, y is up and z is outwards from the screen.

pub fn dolly(&mut self, s: f32)

Moves the camera along the direction of lookat

pub fn orbit(&mut self, rot: Rotation3<f32>)

Rotates the camera around the lookat point.

pub fn orbit_y(&mut self, degrees: f32)

pub fn shift_cam(&mut self, pos: Point3<f32>)

Moves the camera position to be at a new position and also rigidly shifts the lookat point, without rotating camera

pub fn shift_lookat(&mut self, pos: Point3<f32>)

Moves the lookat at a new position and also rigidly shifts the cam point, without rotating camera

pub fn dist_lookat(&self) -> f32

Returns the distance from camera to the lookat point

Trait Implementations

impl Clone for PosLookat

fn clone(&self) -> PosLookat

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Default for PosLookat

fn default() -> Self

Returns the “default value” for a type.