demo_vk/
lib.rs

1use std::ops::{Add, Div, Mul, Range, Sub};
2
3pub mod app;
4pub mod demo;
5pub mod graphics;
6
7pub fn map<T>(x: T, input_range: Range<T>, output_range: Range<T>) -> T
8where
9    T: Copy
10        + Sub<Output = T>
11        + Add<Output = T>
12        + Div<Output = T>
13        + Mul<Output = T>,
14{
15    let (u, v) = (input_range.start, input_range.end);
16    let (s, t) = (output_range.start, output_range.end);
17    let m = (s - t) / (u - v);
18    let b = (t * u - v * s) / (u - v);
19    x * m + b
20}
21
22/// Creates a "Location" type that displays the current location in code when
23/// printed.
24#[macro_export]
25macro_rules! here {
26    () => {
27        $crate::app::Location {
28            file: file!(),
29            line: line!(),
30            col: column!(),
31        }
32    };
33}
34
35/// Tries to resolve a result into a successful output (much like the `?`
36/// operator). Unlike the `?` operator, this macro adds context about the
37/// current line to the error message if something goes wrongw.
38#[macro_export]
39macro_rules! unwrap_here {
40    ($description:expr, $operation:expr) => {{
41        use {anyhow::Context, $crate::here};
42        { $operation }
43            .with_context(|| format!("{} - {}", here!(), $description))?
44    }};
45}
demo_vk/lib.rs

demo_vk/
lib.rs
