Struct crankstart::sprite::RotatedSprite

pub struct RotatedSprite { /* private fields */ }

This is a helper type for rotating and scaling an image in a sprite.

After creation with new, you can set_rotation to update the parameters, and use get_sprite or get_sprite_mut to access the Sprite for other operations like move_to and get_bounds (which can tell you the height and width of the generated bitmap).

Note: the image is rotated around its center point. If you want to rotate around another point, there are a few options:

1. Extend the image with transparent pixels in one direction so it appears to be rotating about another point.
2. Rotate about the center, then move the sprite to an equivalent position.
3. Manage the image and sprite manually: do the math to find the size after rotation, create a fresh Bitmap of that size, and use Graphics.draw_rotated() to draw into it, since draw_rotated allows specifying the center point.

Implementations

impl RotatedSprite

pub fn new( bitmap: Bitmap, angle: f32, scaling: Vector2D<f32> ) -> Result<Self, Error>

Creates a RotatedSprite, draws the rotated and scaled image into it, and adds the underlying sprite to the SpriteManager.

pub fn get_sprite(&self) -> &Sprite

pub fn get_sprite_mut(&mut self) -> &mut Sprite

pub fn set_rotation( &mut self, angle: f32, scaling: Vector2D<f32> ) -> Result<(), Error>

Recreates the underlying bitmap with the given rotation angle and scaling; use get_sprite().get_bounds() to see the new size.

Trait Implementations

impl Clone for RotatedSprite

fn clone(&self) -> RotatedSprite

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for RotatedSprite

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

Formats the value using the given formatter.