32 lines
783 B
Rust
32 lines
783 B
Rust
// pathfinder/geometry/src/util.rs
|
|
//
|
|
// Copyright © 2019 The Pathfinder Project Developers.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
|
|
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
|
|
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
|
|
// option. This file may not be copied, modified, or distributed
|
|
// except according to those terms.
|
|
|
|
//! Various utilities.
|
|
|
|
use std::f32;
|
|
|
|
/// Linear interpolation.
|
|
#[inline]
|
|
pub fn lerp(a: f32, b: f32, t: f32) -> f32 {
|
|
a + (b - a) * t
|
|
}
|
|
|
|
/// Clamping.
|
|
#[inline]
|
|
pub fn clamp(x: f32, min_val: f32, max_val: f32) -> f32 {
|
|
f32::min(max_val, f32::max(min_val, x))
|
|
}
|
|
|
|
/// Divides `a` by `b`, rounding up.
|
|
#[inline]
|
|
pub fn alignup_i32(a: i32, b: i32) -> i32 {
|
|
(a + b - 1) / b
|
|
}
|