Crate emath[−][src]

Opinionated 2D math library for building GUIs.

Includes vectors, positions, rectangles etc.

Conventions (unless otherwise specified):

All angles are in radians
X+ is right and Y+ is down.
(0,0) is left top.
Dimension order is always x y

Re-exports

pub use align::Align;

pub use align::Align2;

Modules

align	One- and two-dimensional alignment (`Align::Center`, `Align2::LEFT_TOP` etc).
smart_aim	Find "simple" numbers is some range. Used by sliders.

Structs

Pos2	A position on screen.
Rect	A rectangular region of space.
Rot2	Represents a rotation in the 2D plane. A rotation of 𝞃/4 = 90° rotates the X axis to the Y axis. Normally a `Rot2` is normalized (unit-length). If not, it will also scale vectors.
Vec2	A vector has a direction and length. A `Vec2` is often used to represent a size.

Traits

NumExt	Extends `f32`, `Vec2` etc with `at_least` and `at_most` as aliases for `max` and `min`.
One	Helper trait to implement `lerp` and `remap`.
Real	Helper trait to implement `lerp` and `remap`.

Functions

almost_equal	Return true when arguments are the same within some rounding error.
clamp	Returns `range.start()` if `x <= range.start()`, returns `range.end()` if `x >= range.end()` and returns `x` elsewhen.
format_with_decimals_in_range
format_with_minimum_decimals
lerp	Linear interpolation.
pos2	`pos2(x,y) == Pos2::new(x, y)`
remap	Linearly remap a value from one range to another, so that when `x == from.start()` returns `to.start()` and when `x == from.end()` returns `to.end()`.
remap_clamp	Like `remap`, but also clamps the value so that the returned value is always in the `to` range.
round_to_decimals	Round a value to the given number of decimal places.
vec2	`vec2(x,y) == Vec2::new(x, y)`