Struct moon_engine::camera::Camera

pub struct Camera {
    pub transform: Transform,
    /* private fields */
}

A Camera represents a Virtual Camera, that has a view and Orthographic projection matrices

Fields

transform: Transform

Transform for the Camera

Implementations

impl Camera

pub fn new() -> Self

Create a new Camera with default values.

pub fn with_position(position: Vec3) -> Self

Create a new Camera with an initial position.

pub fn with_transform(transform: Transform) -> Self

Create a new Camera with an initial transform.

pub fn with_width_and_height(width: f32, height: f32) -> Self

Create a new Camera with an initial width and height.

pub fn set_width_and_height(&mut self, width: f32, height: f32)

Set the width and height of the camera plane, and update the Projection Matrix to match.

pub fn projection(&self) -> &[f32]

Return the Projection Matrix of the Camera as a slice of f32 so it can be used by WebGL.

pub fn view_projection_matrix(&self) -> Mat4

Return the calculated and combined view-projection matrix as a Mat4.

pub fn screen_to_world_coordinates(
    &self,
    screen_x: f32,
    screen_y: f32
) -> (f32, f32)

Get a position in screen co-ordinates to a range within the world.

This works by first converting it into a -1.0 to 1.0 range, and then multiplying its components by the FIXED_WIDTH and FIXED_HEIGHT.

Trait Implementations

impl Debug for Camera

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

Formats the value using the given formatter.

impl Default for Camera

fn default() -> Self

Returns the “default value” for a type.