Struct simple_game_engine::Rect

pub struct Rect { /* fields omitted */ }

A (non-empty) rectangle.

The width and height of a Rect must always be strictly positive (never zero). In cases where empty rects may need to represented, it is recommended to use Option<Rect>, with None representing an empty rectangle (see, for example, the output of the intersection method).

Implementations

impl Rect

pub fn new(x: i32, y: i32, width: u32, height: u32) -> Rect

Creates a new rectangle from the given values.

The width and height are clamped to ensure that the right and bottom sides of the rectangle does not exceed i32::max_value() (the value 2147483647, the maximal positive size of an i32). This means that the rect size will behave oddly if you move it very far to the right or downwards on the screen.

Rects must always be non-empty, so a width and/or height argument of 0 will be replaced with 1.

pub fn from_center<P>(center: P, width: u32, height: u32) -> Rect where
    P: Into<Point>, 

Creates a new rectangle centered on the given position.

The width and height are clamped to ensure that the right and bottom sides of the rectangle does not exceed i32::max_value() (the value 2147483647, the maximal positive size of an i32). This means that the rect size will behave oddly if you move it very far to the right or downwards on the screen.

Rects must always be non-empty, so a width and/or height argument of 0 will be replaced with 1.

pub fn x(&self) -> i32

The horizontal position of this rectangle.

pub fn y(&self) -> i32

The vertical position of this rectangle.

pub fn width(&self) -> u32

The width of this rectangle.

pub fn height(&self) -> u32

The height of this rectangle.

pub fn size(&self) -> (u32, u32)

Returns the width and height of this rectangle.

pub fn set_x(&mut self, x: i32)

Sets the horizontal position of this rectangle to the given value, clamped to be less than or equal to i32::max_value() / 2.

pub fn set_y(&mut self, y: i32)

Sets the vertical position of this rectangle to the given value, clamped to be less than or equal to i32::max_value() / 2.

pub fn set_width(&mut self, width: u32)

Sets the width of this rectangle to the given value, clamped to be less than or equal to i32::max_value() / 2.

Rects must always be non-empty, so a width argument of 0 will be replaced with 1.

pub fn set_height(&mut self, height: u32)

Sets the height of this rectangle to the given value, clamped to be less than or equal to i32::max_value() / 2.

Rects must always be non-empty, so a height argument of 0 will be replaced with 1.

pub fn left(&self) -> i32

Returns the x-position of the left side of this rectangle.

pub fn right(&self) -> i32

Returns the x-position of the right side of this rectangle.

pub fn top(&self) -> i32

Returns the y-position of the top side of this rectangle.

pub fn bottom(&self) -> i32

Returns the y-position of the bottom side of this rectangle.

pub fn center(&self) -> Point

Returns the center position of this rectangle.

Note that if the width or height is not a multiple of two, the center will be rounded down.

Example

use sdl2::rect::{Rect,Point};
let rect = Rect::new(1,0,2,3);
assert_eq!(Point::new(2,1),rect.center());

pub fn top_left(&self) -> Point

Returns the top-left corner of this rectangle.

Example

use sdl2::rect::{Rect, Point};
let rect = Rect::new(1, 0, 2, 3);
assert_eq!(Point::new(1, 0), rect.top_left());

pub fn top_right(&self) -> Point

Returns the top-right corner of this rectangle.

Example

use sdl2::rect::{Rect, Point};
let rect = Rect::new(1, 0, 2, 3);
assert_eq!(Point::new(3, 0), rect.top_right());

pub fn bottom_left(&self) -> Point

Returns the bottom-left corner of this rectangle.

Example

use sdl2::rect::{Rect, Point};
let rect = Rect::new(1, 0, 2, 3);
assert_eq!(Point::new(1, 3), rect.bottom_left());

pub fn bottom_right(&self) -> Point

Returns the bottom-right corner of this rectangle.

Example

use sdl2::rect::{Rect, Point};
let rect = Rect::new(1, 0, 2, 3);
assert_eq!(Point::new(3, 3), rect.bottom_right());

pub fn set_right(&mut self, right: i32)

Sets the position of the right side of this rectangle to the given value, clamped to be less than or equal to i32::max_value() / 2.

pub fn set_bottom(&mut self, bottom: i32)

Sets the position of the bottom side of this rectangle to the given value, clamped to be less than or equal to i32::max_value() / 2.

pub fn center_on<P>(&mut self, point: P) where
    P: Into<(i32, i32)>, 

Centers the rectangle on the given point.

pub fn offset(&mut self, x: i32, y: i32)

Move this rect and clamp the positions to prevent over/underflow. This also clamps the size to prevent overflow.

pub fn reposition<P>(&mut self, point: P) where
    P: Into<(i32, i32)>, 

Moves this rect to the given position after clamping the values.

pub fn resize(&mut self, width: u32, height: u32)

Resizes this rect to the given size after clamping the values.

pub fn contains_point<P>(&self, point: P) -> bool where
    P: Into<(i32, i32)>, 

Checks whether this rectangle contains a given point.

Points along the right and bottom edges are not considered to be inside the rectangle; this way, a 1-by-1 rectangle contains only a single point. Another way to look at it is that this method returns true if and only if the given point would be painted by a call to Renderer::fill_rect.

Examples

use sdl2::rect::{Rect, Point};
let rect = Rect::new(1, 2, 3, 4);
assert!(rect.contains_point(Point::new(1, 2)));
assert!(!rect.contains_point(Point::new(0, 1)));
assert!(rect.contains_point(Point::new(3, 5)));
assert!(!rect.contains_point(Point::new(4, 6)));

pub fn contains_rect(&self, other: Rect) -> bool

Checks whether this rectangle completely contains another rectangle.

This method returns true if and only if every point contained by other is also contained by self; in other words, if the intersection of self and other is equal to other.

Examples

use sdl2::rect::Rect;
let rect = Rect::new(1, 2, 3, 4);
assert!(rect.contains_rect(rect));
assert!(rect.contains_rect(Rect::new(3, 3, 1, 1)));
assert!(!rect.contains_rect(Rect::new(2, 1, 1, 1)));
assert!(!rect.contains_rect(Rect::new(3, 3, 2, 1)));

pub fn raw(&self) -> *const SDL_Rect

Returns the underlying C Rect.

pub fn raw_mut(&mut self) -> *mut SDL_Rect

pub fn raw_slice(slice: &[Rect]) -> *const SDL_Rect

pub fn from_ll(raw: SDL_Rect) -> Rect

pub fn from_enclose_points<R>(
    points: &[Point],
    clipping_rect: R
) -> Option<Rect> where
    R: Into<Option<Rect>>, 

Calculate a minimal rectangle enclosing a set of points. If a clipping rectangle is given, only points that are within it will be considered.

pub fn has_intersection(&self, other: Rect) -> bool

Determines whether two rectangles intersect.

Rectangles that share an edge but don’t actually overlap are not considered to intersect.

Examples

use sdl2::rect::Rect;
let rect = Rect::new(0, 0, 5, 5);
assert!(rect.has_intersection(rect));
assert!(rect.has_intersection(Rect::new(2, 2, 5, 5)));
assert!(!rect.has_intersection(Rect::new(5, 0, 5, 5)));

pub fn intersection(&self, other: Rect) -> Option<Rect>

Calculates the intersection of two rectangles.

Returns None if the two rectangles don’t intersect. Rectangles that share an edge but don’t actually overlap are not considered to intersect.

The bitwise AND operator & can also be used.

Examples

use sdl2::rect::Rect;
let rect = Rect::new(0, 0, 5, 5);
assert_eq!(rect.intersection(rect), Some(rect));
assert_eq!(rect.intersection(Rect::new(2, 2, 5, 5)),
           Some(Rect::new(2, 2, 3, 3)));
assert_eq!(rect.intersection(Rect::new(5, 0, 5, 5)), None);

pub fn union(&self, other: Rect) -> Rect

Calculates the union of two rectangles (i.e. the smallest rectangle that contains both).

The bitwise OR operator | can also be used.

Examples

use sdl2::rect::Rect;
let rect = Rect::new(0, 0, 5, 5);
assert_eq!(rect.union(rect), rect);
assert_eq!(rect.union(Rect::new(2, 2, 5, 5)), Rect::new(0, 0, 7, 7));
assert_eq!(rect.union(Rect::new(5, 0, 5, 5)), Rect::new(0, 0, 10, 5));

pub fn intersect_line(&self, start: Point, end: Point) -> Option<(Point, Point)>

Calculates the intersection of a rectangle and a line segment and returns the points of their intersection.

Trait Implementations

impl AsMut<SDL_Rect> for Rect

pub fn as_mut(&mut self) -> &mut SDL_Rect

Performs the conversion.

impl AsRef<SDL_Rect> for Rect

pub fn as_ref(&self) -> &SDL_Rect

Performs the conversion.

impl BitAnd<Rect> for Rect

type Output = Option<Rect>

The resulting type after applying the & operator.

pub fn bitand(self, rhs: Rect) -> Option<Rect>

Performs the & operation.

impl BitOr<Rect> for Rect

type Output = Rect

The resulting type after applying the | operator.

pub fn bitor(self, rhs: Rect) -> Rect

Performs the | operation.

impl Clone for Rect

pub fn clone(&self) -> Rect

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Rect

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

Formats the value using the given formatter.

impl Deref for Rect

pub fn deref(&self) -> &SDL_Rect

Example

use sdl2::rect::Rect;
let rect = Rect::new(2, 3, 4, 5);
assert_eq!(2, rect.x);

type Target = SDL_Rect

The resulting type after dereferencing.

impl DerefMut for Rect

pub fn deref_mut(&mut self) -> &mut SDL_Rect

Example

use sdl2::rect::Rect;
let mut rect = Rect::new(2, 3, 4, 5);
rect.x = 60;
assert_eq!(60, rect.x);

impl From<(i32, i32, u32, u32)> for Rect

pub fn from((i32, i32, u32, u32)) -> Rect

Performs the conversion.

impl From<SDL_Rect> for Rect

pub fn from(raw: SDL_Rect) -> Rect

Performs the conversion.

impl Hash for Rect

pub fn hash<H>(&self, state: &mut H) where
    H: Hasher, 

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, 

Feeds a slice of this type into the given Hasher.

impl Into<(i32, i32, u32, u32)> for Rect

pub fn into(self) -> (i32, i32, u32, u32)

Performs the conversion.

impl Into<SDL_Rect> for Rect

pub fn into(self) -> SDL_Rect

Performs the conversion.

impl PartialEq<Rect> for Rect

pub fn eq(&self, other: &Rect) -> bool

This method tests for self and other values to be equal, and is used by ==.

#[must_use]

fn ne(&self, other: &Rhs) -> bool

This method tests for !=.

impl Copy for Rect

impl Eq for Rect