├── .github └── workflows │ └── ci.yaml ├── .gitignore ├── Cargo.lock ├── Cargo.toml ├── LICENSE ├── README.md ├── assets └── Menlo-Regular.ttf ├── docs.sh ├── rustfmt.toml └── src ├── algorithms ├── all.rs ├── bubble.rs ├── cocktail.rs ├── cycle.rs ├── gnome.rs ├── heap.rs ├── insertion.rs ├── merge.rs ├── mod.rs ├── quicksort.rs ├── selection.rs └── shellsort.rs ├── app.rs ├── array.rs ├── cli.rs ├── main.rs └── state.rs /.github/workflows/ci.yaml: -------------------------------------------------------------------------------- 1 | name: CI 2 | on: [push, pull_request, workflow_dispatch] 3 | 4 | env: 5 | CARGO_TERM_COLOR: always 6 | 7 | jobs: 8 | build: 9 | name: Build 10 | runs-on: ubuntu-latest 11 | 12 | steps: 13 | - uses: actions/checkout@v2 14 | - name: Install Rust toolchain (nightly) 15 | id: install_rust 16 | uses: actions-rs/toolchain@v1 17 | with: 18 | toolchain: stable 19 | components: rustfmt, clippy 20 | default: true 21 | - name: Install SDL2 22 | run: sudo apt-get install libsdl2-dev 23 | 24 | - uses: actions/cache@v2 25 | with: 26 | path: | 27 | ~/.cargo/registry 28 | ~/.cargo/git 29 | target 30 | key: ${{ runner.os }}-rust-${{ steps.install_rust.outputs.rustc_hash }}-${{ hashFiles('**/Cargo.lock') }} 31 | restore-keys: | 32 | ${{ runner.os }}-rust-${{ steps.install_rust.outputs.rustc_hash }}- 33 | 34 | - name: cargo check 35 | run: cargo check --verbose --workspace --all-targets 36 | 37 | - name: cargo build 38 | run: cargo build --verbose 39 | 40 | - name: cargo test 41 | run: cargo test --verbose --workspace 42 | 43 | - name: cargo fmt 44 | run: cargo fmt --verbose --all -- --check 45 | 46 | - name: cargo clippy 47 | run: cargo clippy --verbose --workspace 48 | 49 | upload_docs: 50 | name: Upload documentation 51 | runs-on: ubuntu-latest 52 | needs: build 53 | if: github.ref == 'refs/heads/master' 54 | 55 | steps: 56 | - uses: actions/checkout@v2 57 | - name: Install Rust toolchain (stable) 58 | id: install_rust 59 | uses: actions-rs/toolchain@v1 60 | with: 61 | toolchain: nightly 62 | override: true 63 | 64 | - uses: actions/cache@v2 65 | with: 66 | path: | 67 | ~/.cargo/registry 68 | ~/.cargo/git 69 | target 70 | key: ${{ runner.os }}-rust-${{ steps.install_rust.outputs.rustc_hash }}-${{ hashFiles('**/Cargo.lock') }} 71 | restore-keys: | 72 | ${{ runner.os }}-rust-${{ steps.install_rust.outputs.rustc_hash }}- 73 | 74 | - name: Generate documentation 75 | run: ./docs.sh --verbose 76 | 77 | - name: Deploy 78 | uses: peaceiris/actions-gh-pages@v3 79 | with: 80 | github_token: ${{ secrets.GITHUB_TOKEN }} 81 | publish_dir: target/doc 82 | force_orphan: true 83 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | /target 2 | **/*.rs.bk 3 | Cargo.lock 4 | -------------------------------------------------------------------------------- /Cargo.lock: 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5 | version = "0.1.0" 6 | authors = ["Dmytro Meleshko "] 7 | description = "A Rust program for visualizing sorting algorithms which uses Piston for graphics. Inspired by Hopson97/Sort-Algorithm-Visualiser." 8 | license = "MIT" 9 | repository = "https://github.com/dmitmel/sorting-visualization.git" 10 | homepage = "https://github.com/dmitmel/sorting-visualization" 11 | readme = "README.md" 12 | 13 | [dependencies] 14 | clap = "2.32" 15 | failure = "0.1" 16 | failure_derive = "0.1" 17 | piston = "0.39" 18 | piston2d-graphics = "0.28" 19 | piston2d-opengl_graphics = "0.57" 20 | pistoncore-sdl2_window = "0.52" 21 | rand = "0.5" 22 | 23 | [features] 24 | doc = [] 25 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | MIT License 2 | 3 | Copyright (c) 2018 Dmytro Meleshko 4 | 5 | Permission is hereby granted, free of charge, to any person obtaining a copy 6 | of this software and associated documentation files (the "Software"), to deal 7 | in the Software without restriction, including without limitation the rights 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 9 | copies of the Software, and to permit persons to whom the Software is 10 | furnished to do so, subject to the following conditions: 11 | 12 | The above copyright notice and this permission notice shall be included in all 13 | copies or substantial portions of the Software. 14 | 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 21 | SOFTWARE. 22 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # sorting-visualization 2 | 3 | [![CI Status](https://github.com/dmitmel/sorting-visualization/workflows/CI/badge.svg)](https://github.com/dmitmel/sorting-visualization/actions?query=workflow:CI) 4 | 5 | A [Rust](https://www.rust-lang.org/) program for visualizing sorting algorithms which uses [Piston](http://www.piston.rs/) for graphics. Inspired by [**Hopson97/Sort-Algorithm-Visualiser**](https://github.com/Hopson97/Sort-Algorithm-Visualiser). 6 | 7 | [![Demo](https://i.imgur.com/jyPDiWX.gif)](https://gist.github.com/dmitmel/f8664421b547577065912c3246f4c1e9) 8 | 9 | ## Setup 10 | 11 | ```bash 12 | git clone https://github.com/dmitmel/sorting-visualization 13 | cd sorting-visualization 14 | cargo build --release 15 | ``` 16 | 17 | ## Usage 18 | 19 | ```bash 20 | # see 'Features' section for the list of supported algorithms and their IDs 21 | # and use the --help flag to print all available animation options 22 | cargo run 23 | # list all available algorithms 24 | cargo run -- --list 25 | ``` 26 | 27 | ## Features 28 | 29 | - CLI 30 | - Supports different algorithms (IDs are in brackets): 31 | - [Bubble sort](https://en.wikipedia.org/wiki/Bubble_sort) \[`bubble`\] 32 | - [Cocktail sort](https://en.wikipedia.org/wiki/Cocktail_shaker_sort) \[`cocktail`\] 33 | - [Cycle sort](https://en.wikipedia.org/wiki/Cycle_sort) \[`cycle`\] 34 | - [Gnome sort](https://en.wikipedia.org/wiki/Gnome_sort) \[`gnome`\] 35 | - [Heap sort](https://en.wikipedia.org/wiki/Heapsort) \[`heap`\] 36 | - [Insertion sort](https://en.wikipedia.org/wiki/Insertion_sort) \[`insertion`\] 37 | - [Merge sort](https://en.wikipedia.org/wiki/Merge_sort) \[`merge`\] 38 | - [Quicksort](https://en.wikipedia.org/wiki/Quicksort) \[`quicksort`\] 39 | - [Selection sort](https://en.wikipedia.org/wiki/Selection_sort) \[`selection`\] 40 | - [Shellsort](https://en.wikipedia.org/wiki/Shellsort) \[`shellsort`\] 41 | - Animation controls: 42 | - Space - pause/resume 43 | - ↑ - 2x faster 44 | - ↓ - 2x slower 45 | - Easy-to-use algorithm API 46 | - Algorithms can highlight important array elements 47 | - Code is well-documented 48 | 49 | ## Building docs 50 | 51 | ```bash 52 | ./docs.sh 53 | ``` 54 | 55 | **Nightly Rust is required for building docs** because it has [infra doc link resolution](https://github.com/rust-lang/rust/issues/43466) which is currently unstable. 56 | 57 | ## TODO 58 | 59 | 1. User-friendly GUI 60 | 2. More algorithms 61 | 3. Sound? 62 | 63 | ## Contributing 64 | 65 | [**Documentation**](https://dmitmel.github.io/sorting-visualization) 66 | 67 | PRs are appreciated! 68 | 69 | ## License 70 | 71 | [MIT](https://github.com/dmitmel/sorting-visualization/blob/master/LICENSE) © [Dmytro Meleshko](https://github.com/dmitmel) 72 | -------------------------------------------------------------------------------- /assets/Menlo-Regular.ttf: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/dmitmel/sorting-visualization/895cedf116d57b1d9494297e1d56383c2370b57d/assets/Menlo-Regular.ttf -------------------------------------------------------------------------------- /docs.sh: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env bash 2 | 3 | set -e 4 | 5 | cargo +nightly doc --document-private-items --features doc "$@" 6 | 7 | cat > target/doc/index.html < 9 | HTML 10 | -------------------------------------------------------------------------------- /rustfmt.toml: -------------------------------------------------------------------------------- 1 | max_width = 80 2 | tab_spaces = 2 3 | -------------------------------------------------------------------------------- /src/algorithms/all.rs: -------------------------------------------------------------------------------- 1 | use super::{Algorithm, Array}; 2 | 3 | pub struct All; 4 | 5 | impl Algorithm for All { 6 | fn sort(&self, array: Array) { 7 | // Get the list of algorithms 8 | loop { 9 | for (_name, algo) in super::all() { 10 | // Run the algorithm on the array 11 | algo.sort(array.clone()); 12 | // Shuffles the array 13 | array.shuffle(); 14 | } 15 | } 16 | } 17 | 18 | fn name(&self) -> String { 19 | "All algorithms".to_string() 20 | } 21 | } 22 | -------------------------------------------------------------------------------- /src/algorithms/bubble.rs: -------------------------------------------------------------------------------- 1 | //! [Bubble sort](https://en.wikipedia.org/wiki/Bubble_sort) 2 | 3 | use super::{Algorithm, Array}; 4 | 5 | /// [Bubble sort](https://en.wikipedia.org/wiki/Bubble_sort) 6 | pub struct BubbleSort; 7 | 8 | impl Algorithm for BubbleSort { 9 | fn sort(&self, array: Array) { 10 | let len = array.len(); 11 | for i in 0..len - 1 { 12 | let last = len - i - 1; 13 | array.set_color(last, [0.0, 1.0, 0.0, 0.8]); 14 | 15 | for j in 0..last { 16 | array.set_color(j, [0.0, 1.0, 0.0, 0.8]); 17 | if array.get(j) > array.get(j + 1) { 18 | array.swap(j, j + 1); 19 | } 20 | array.wait(5); 21 | array.reset_color(j); 22 | } 23 | 24 | array.reset_color(last); 25 | } 26 | } 27 | 28 | fn name(&self) -> String { 29 | "Bubble sort".to_string() 30 | } 31 | } 32 | -------------------------------------------------------------------------------- /src/algorithms/cocktail.rs: -------------------------------------------------------------------------------- 1 | //! [Cocktail sort](https://en.wikipedia.org/wiki/Cocktail_shaker_sort) 2 | 3 | use super::{Algorithm, Array}; 4 | 5 | /// [Cocktail sort](https://en.wikipedia.org/wiki/Cocktail_shaker_sort) 6 | pub struct CocktailSort; 7 | 8 | impl Algorithm for CocktailSort { 9 | fn sort(&self, array: Array) { 10 | let len = array.len(); 11 | let mut first = 0; 12 | let mut last = len - 1; 13 | let mut swapped: bool = true; 14 | 15 | while swapped { 16 | swapped = false; 17 | array.set_color(last, [0.0, 1.0, 0.0, 0.8]); 18 | 19 | for i in first..last { 20 | array.set_color(i, [0.0, 1.0, 0.0, 0.8]); 21 | if array.get(i) > array.get(i + 1) { 22 | array.swap(i, i + 1); 23 | swapped = true; 24 | } 25 | array.wait(5); 26 | array.reset_color(i); 27 | } 28 | 29 | array.reset_color(last); 30 | 31 | if !swapped { 32 | break; 33 | } 34 | 35 | swapped = false; 36 | last -= 1; 37 | array.set_color(first, [0.0, 1.0, 0.0, 0.8]); 38 | 39 | for j in (first..last).rev() { 40 | array.set_color(j, [0.0, 1.0, 0.0, 0.8]); 41 | if array.get(j) > array.get(j + 1) { 42 | array.swap(j, j + 1); 43 | swapped = true; 44 | } 45 | array.wait(5); 46 | array.reset_color(j); 47 | } 48 | 49 | array.reset_color(first); 50 | first += 1; 51 | } 52 | } 53 | 54 | fn name(&self) -> String { 55 | "Cocktail sort".to_string() 56 | } 57 | } 58 | -------------------------------------------------------------------------------- /src/algorithms/cycle.rs: -------------------------------------------------------------------------------- 1 | //! [Cycle sort](https://en.wikipedia.org/wiki/Cycle_sort) 2 | 3 | use super::{Algorithm, Array}; 4 | 5 | /// [Cycle sort](https://en.wikipedia.org/wiki/Cycle_sort) 6 | pub struct CycleSort; 7 | 8 | impl Algorithm for CycleSort { 9 | fn sort(&self, array: Array) { 10 | let len = array.len(); 11 | for cycle_start in 0..len - 1 { 12 | array.set_color(cycle_start, [0.0, 0.0, 1.0, 0.5]); 13 | 14 | let mut item = array.get(cycle_start); 15 | let mut sorted_index = self.find_sorted_index(&array, cycle_start, item); 16 | 17 | if sorted_index == cycle_start { 18 | continue; 19 | } 20 | 21 | while item == array.get(sorted_index) { 22 | sorted_index += 1; 23 | } 24 | 25 | let tmp = item; 26 | item = array.get(sorted_index); 27 | array.set(sorted_index, tmp); 28 | 29 | while sorted_index != cycle_start { 30 | array.set_color(sorted_index, [0.0, 0.0, 1.0, 0.5]); 31 | sorted_index = cycle_start; 32 | 33 | for i in cycle_start + 1..len { 34 | if array.get(i) < item { 35 | sorted_index += 1; 36 | } 37 | array.wait(2); 38 | } 39 | 40 | while item == array.get(sorted_index) { 41 | sorted_index += 1; 42 | array.wait(2); 43 | } 44 | 45 | let tmp = item; 46 | item = array.get(sorted_index); 47 | array.set(sorted_index, tmp); 48 | } 49 | } 50 | } 51 | 52 | fn name(&self) -> String { 53 | "Cycle sort".to_string() 54 | } 55 | } 56 | 57 | impl CycleSort { 58 | fn find_sorted_index( 59 | &self, 60 | array: &Array, 61 | cycle_start: usize, 62 | item: u32, 63 | ) -> usize { 64 | let len = array.len(); 65 | 66 | let mut sorted_index = cycle_start; 67 | for i in cycle_start + 1..len { 68 | if array.get(i) < item { 69 | sorted_index += 1; 70 | } 71 | array.wait(2); 72 | } 73 | 74 | sorted_index 75 | } 76 | } 77 | -------------------------------------------------------------------------------- /src/algorithms/gnome.rs: -------------------------------------------------------------------------------- 1 | //! [Gnome sort](https://en.wikipedia.org/wiki/Gnome_sort) 2 | 3 | use super::{Algorithm, Array}; 4 | 5 | /// [Gnome sort](https://en.wikipedia.org/wiki/Gnome_sort) 6 | pub struct GnomeSort; 7 | 8 | impl Algorithm for GnomeSort { 9 | fn sort(&self, array: Array) { 10 | let len = array.len(); 11 | let mut i = 0; 12 | while i < len { 13 | array.set_color(i, [0.0, 1.0, 0.0, 0.8]); 14 | array.wait(5); 15 | array.reset_color(i); 16 | 17 | if i == 0 || array.get(i) >= array.get(i - 1) { 18 | i += 1; 19 | } else { 20 | array.swap(i, i - 1); 21 | i -= 1; 22 | } 23 | } 24 | } 25 | 26 | fn name(&self) -> String { 27 | "Gnome sort".to_string() 28 | } 29 | } 30 | -------------------------------------------------------------------------------- /src/algorithms/heap.rs: -------------------------------------------------------------------------------- 1 | //! [Heap sort](https://en.wikipedia.org/wiki/Heapsort) 2 | 3 | use super::{Algorithm, Array}; 4 | 5 | /// [Heap sort](https://en.wikipedia.org/wiki/Heapsort) 6 | pub struct HeapSort; 7 | 8 | impl Algorithm for HeapSort { 9 | fn sort(&self, array: Array) { 10 | let first = 0; 11 | let n = array.len(); 12 | 13 | for i in (first..n / 2 - 1).rev() { 14 | heapify(&array, n, i); 15 | } 16 | 17 | for i in (first..n).rev() { 18 | array.swap(first, i); 19 | heapify(&array, i, first); 20 | } 21 | 22 | fn heapify(array: &Array, n: usize, i: usize) { 23 | let mut largest = i; 24 | let left = 2 * i + 1; 25 | let right = 2 * i + 2; 26 | 27 | if left < n && array.get(left) > array.get(largest) { 28 | largest = left; 29 | } 30 | 31 | if right < n && array.get(right) > array.get(largest) { 32 | largest = right; 33 | } 34 | 35 | if largest != i { 36 | array.set_color(i, [0.0, 1.0, 0.0, 0.8]); 37 | array.swap(i, largest); 38 | heapify(array, n, largest); 39 | array.wait(5); 40 | array.reset_color(i); 41 | } 42 | } 43 | } 44 | 45 | fn name(&self) -> String { 46 | "HeapSort sort".to_string() 47 | } 48 | } 49 | -------------------------------------------------------------------------------- /src/algorithms/insertion.rs: -------------------------------------------------------------------------------- 1 | //! [Insertion sort](https://en.wikipedia.org/wiki/Insertion_sort) 2 | 3 | use super::{Algorithm, Array}; 4 | 5 | /// [Insertion sort](https://en.wikipedia.org/wiki/Insertion_sort) 6 | pub struct InsertionSort; 7 | 8 | impl Algorithm for InsertionSort { 9 | fn sort(&self, array: Array) { 10 | let len = array.len(); 11 | for i in 1..len { 12 | array.set_color(i, [0.0, 1.0, 0.0, 0.8]); 13 | array.wait(7); 14 | 15 | let mut j = i; 16 | while j > 0 && array.get(j - 1) > array.get(j) { 17 | array.swap(j, j - 1); 18 | j -= 1; 19 | 20 | array.set_color(j, [0.0, 1.0, 0.0, 0.8]); 21 | array.wait(7); 22 | array.reset_color(j); 23 | } 24 | 25 | array.reset_color(i); 26 | } 27 | } 28 | 29 | fn name(&self) -> String { 30 | "Insertion sort".to_string() 31 | } 32 | } 33 | -------------------------------------------------------------------------------- /src/algorithms/merge.rs: -------------------------------------------------------------------------------- 1 | //! [Merge sort](https://en.wikipedia.org/wiki/Merge_sort) 2 | 3 | use super::{Algorithm, Array}; 4 | 5 | /// [Merge sort](https://en.wikipedia.org/wiki/Merge_sort) 6 | pub struct MergeSort; 7 | 8 | impl Algorithm for MergeSort { 9 | fn sort(&self, array: Array) { 10 | merge_sort(&array, 0, array.len() - 1); 11 | } 12 | 13 | fn name(&self) -> String { 14 | "Merge sort".to_string() 15 | } 16 | } 17 | 18 | fn merge_sort(array: &Array, left: usize, right: usize) { 19 | if left < right { 20 | let middle = (left + right) / 2; 21 | array.set_color(middle, [1.0, 0.0, 0.0, 1.0]); 22 | 23 | for i in left..middle { 24 | array.set_color(i, [0.0, 1.0, 0.0, 0.3]); 25 | } 26 | merge_sort(array, left, middle); 27 | 28 | for i in middle + 1..=right { 29 | array.set_color(i, [0.0, 0.0, 1.0, 0.3]); 30 | } 31 | merge_sort(array, middle + 1, right); 32 | 33 | merge(array, left, middle, right); 34 | 35 | for i in left..=right { 36 | array.reset_color(i); 37 | } 38 | } 39 | } 40 | 41 | fn merge(array: &Array, left: usize, middle: usize, right: usize) { 42 | let left_size = middle - left + 1; 43 | let right_size = right - middle; 44 | 45 | let left_array = sub_array(array, left, left_size); 46 | let right_array = sub_array(array, middle + 1, right_size); 47 | 48 | let mut i = 0; 49 | let mut j = 0; 50 | let mut k = left; 51 | let mut prev_k = k; 52 | 53 | while i < left_size && j < right_size { 54 | array.reset_color(prev_k); 55 | array.set_color(k, [1.0, 0.0, 0.0, 1.0]); 56 | prev_k = k; 57 | 58 | if left_array[i] <= right_array[j] { 59 | array.set(k, left_array[i]); 60 | i += 1; 61 | } else { 62 | array.set(k, right_array[j]); 63 | j += 1; 64 | } 65 | k += 1; 66 | array.wait(20); 67 | } 68 | 69 | array.reset_color(prev_k); 70 | 71 | while i < left_size { 72 | array.set(k, left_array[i]); 73 | i += 1; 74 | k += 1; 75 | array.wait(20); 76 | } 77 | 78 | while j < right_size { 79 | array.set(k, right_array[j]); 80 | j += 1; 81 | k += 1; 82 | array.wait(20); 83 | } 84 | } 85 | 86 | fn sub_array(array: &Array, begin: usize, size: usize) -> Vec { 87 | (0..size) 88 | .map(|i| { 89 | array.wait(10); 90 | array.get(begin + i) 91 | }) 92 | .collect() 93 | } 94 | -------------------------------------------------------------------------------- /src/algorithms/mod.rs: -------------------------------------------------------------------------------- 1 | //! Different sorting algorithms as well as the general 2 | //! [`Algorithm`](crate::algorithms::Algorithm) trait. 3 | 4 | use std::collections::HashMap; 5 | 6 | // re-export Array struct for use in algorithms 7 | pub use crate::array::Array; 8 | 9 | /// The general trait for all sorting algorithms. 10 | pub trait Algorithm { 11 | /// Sorts a given [array](crate::array::Array). This method is called in a so 12 | /// called "algorithm thread". 13 | fn sort(&self, array: Array); 14 | /// Returns the name of the algorithm that will be displayed to the user. 15 | /// Returned value is an owned [String] so it can be generated at runtime. 16 | fn name(&self) -> String; 17 | } 18 | 19 | /// A shorthand macro that declares modules of all algorithms, re-exports those 20 | /// algorithms and generates a function that returns all algorithms. 21 | macro_rules! algorithms { 22 | ($($id:ident => $type:ident,)+) => { 23 | $( 24 | pub mod $id; 25 | pub use self::$id::$type; 26 | )* 27 | 28 | /// Returns a [hashmap](HashMap) of all algorithms. It is used in the 29 | /// [cli](crate::cli) module. 30 | pub fn all() -> HashMap> { 31 | let mut algorithms: HashMap> = 32 | HashMap::new(); 33 | $(algorithms.insert(stringify!($id).to_string(), Box::new(self::$id::$type));)* 34 | algorithms 35 | } 36 | }; 37 | } 38 | 39 | algorithms![ 40 | bubble => BubbleSort, 41 | cocktail => CocktailSort, 42 | cycle => CycleSort, 43 | gnome => GnomeSort, 44 | heap => HeapSort, 45 | insertion => InsertionSort, 46 | merge => MergeSort, 47 | quicksort => Quicksort, 48 | selection => SelectionSort, 49 | shellsort => Shellsort, 50 | all => All, 51 | ]; 52 | -------------------------------------------------------------------------------- /src/algorithms/quicksort.rs: -------------------------------------------------------------------------------- 1 | //! [Quicksort](https://en.wikipedia.org/wiki/Quicksort) 2 | 3 | use super::{Algorithm, Array}; 4 | 5 | /// [Quicksort](https://en.wikipedia.org/wiki/Quicksort) 6 | pub struct Quicksort; 7 | 8 | impl Algorithm for Quicksort { 9 | fn sort(&self, array: Array) { 10 | self.sort_slice(&array, 0, array.len() as isize - 1); 11 | } 12 | 13 | fn name(&self) -> String { 14 | "Quicksort".to_string() 15 | } 16 | } 17 | 18 | impl Quicksort { 19 | fn sort_slice(&self, array: &Array, low: isize, high: isize) { 20 | if low < high { 21 | let pivot = self.partition(array, low, high); 22 | 23 | for i in low..pivot { 24 | array.set_color(i as usize, [0.0, 1.0, 0.0, 0.3]); 25 | } 26 | array.set_color(pivot as usize, [1.0, 0.0, 0.0, 1.0]); 27 | for i in pivot + 1..=high { 28 | array.set_color(i as usize, [0.0, 0.0, 1.0, 0.3]); 29 | } 30 | 31 | self.sort_slice(array, low, pivot - 1); 32 | self.sort_slice(array, pivot + 1, high); 33 | 34 | for i in low..=high { 35 | array.reset_color(i as usize); 36 | } 37 | } 38 | } 39 | 40 | fn partition(&self, array: &Array, low: isize, high: isize) -> isize { 41 | let pivot = array.get(high as usize); 42 | let mut i = low; 43 | for j in low..high { 44 | if array.get(j as usize) <= pivot { 45 | array.swap(i as usize, j as usize); 46 | i += 1; 47 | } 48 | array.wait(15); 49 | } 50 | array.swap(i as usize, high as usize); 51 | i 52 | } 53 | } 54 | -------------------------------------------------------------------------------- /src/algorithms/selection.rs: -------------------------------------------------------------------------------- 1 | //! [Selection sort](https://en.wikipedia.org/wiki/Selection_sort) 2 | 3 | use super::{Algorithm, Array}; 4 | 5 | /// [Selection sort](https://en.wikipedia.org/wiki/Selection_sort) 6 | pub struct SelectionSort; 7 | 8 | impl Algorithm for SelectionSort { 9 | fn sort(&self, array: Array) { 10 | let len = array.len(); 11 | for i in 0..len - 1 { 12 | array.set_color(i, [0.0, 1.0, 0.0, 0.7]); 13 | 14 | let mut min_i = i; 15 | for j in i + 1..len { 16 | if array.get(j) < array.get(min_i) { 17 | if min_i != i { 18 | array.reset_color(min_i); 19 | } 20 | 21 | min_i = j; 22 | array.set_color(min_i, [0.0, 1.0, 0.0, 0.7]); 23 | } 24 | 25 | array.wait(5); 26 | } 27 | 28 | array.wait(20); 29 | 30 | array.swap(i, min_i); 31 | array.reset_color(i); 32 | array.reset_color(min_i); 33 | } 34 | } 35 | 36 | fn name(&self) -> String { 37 | "Selection sort".to_string() 38 | } 39 | } 40 | -------------------------------------------------------------------------------- /src/algorithms/shellsort.rs: -------------------------------------------------------------------------------- 1 | //! [Shell sort](https://en.wikipedia.org/wiki/Shellsort) 2 | 3 | use super::{Algorithm, Array}; 4 | 5 | /// [Shell sort](https://en.wikipedia.org/wiki/Shellsort) 6 | pub struct Shellsort; 7 | 8 | impl Algorithm for Shellsort { 9 | fn sort(&self, array: Array) { 10 | let len = array.len() as i64; 11 | 12 | let mut gap = 1; 13 | 14 | while gap < (len >> 1) { 15 | gap = (gap << 1) + 1; 16 | } 17 | 18 | while gap >= 1 { 19 | let mut i = gap; 20 | while i < len { 21 | let mut k = i - gap; 22 | let mut j = i; 23 | while j >= gap && array.get(j as usize) < array.get(k as usize) { 24 | array.swap(j as usize, k as usize); 25 | array.wait(10); 26 | j = k; 27 | k -= gap; 28 | } 29 | array.wait(10); 30 | i += 1; 31 | } 32 | gap >>= 1; 33 | } 34 | } 35 | 36 | fn name(&self) -> String { 37 | "Shell sort".to_string() 38 | } 39 | } 40 | -------------------------------------------------------------------------------- /src/app.rs: -------------------------------------------------------------------------------- 1 | //! The [`App`] struct and some constants. 2 | 3 | use graphics::color::{BLACK, TRANSPARENT, WHITE}; 4 | use graphics::types::Color; 5 | use opengl_graphics::{GlGraphics, GlyphCache}; 6 | use piston::input::*; 7 | 8 | use std::thread; 9 | 10 | use crate::algorithms::Algorithm; 11 | use crate::array::Array; 12 | 13 | use crate::state::*; 14 | 15 | /// Color that is used to clear the window before [drawing](App::render). 16 | pub const BACKGROUND_COLOR: Color = BLACK; 17 | 18 | /// Color of rectangles that represent the array values. 19 | pub const VALUE_COLOR: Color = WHITE; 20 | 21 | /// Color of the values that have been recently accessed. 22 | /// 23 | /// _See_ [`State.array_accesses`](State::array_accesses) 24 | pub const ACCESSED_VALUE_COLOR: Color = [1.0, 0.0, 0.0, 1.0]; 25 | 26 | /// Time in seconds after which array accesses are removed. 27 | /// 28 | /// _See_ [`State.array_accesses`](State::array_accesses) 29 | pub const ACCESSED_VALUE_TIMEOUT: f64 = 0.25; 30 | 31 | /// Font size of the status text in pixels. 32 | pub const STATUS_TEXT_FONT_SIZE: u32 = 16; 33 | 34 | /// Margins between the status text and window borders. 35 | pub const STATUS_TEXT_MARGIN: f64 = 8.0; 36 | 37 | /// Factor for increasing / decreasing speed of sorting array 38 | pub const SPEED_FACTOR: f64 = 2.0; 39 | 40 | /// This struct contains all [rendering](App::render), [updating](App::update) 41 | /// and [input handling](App::button) logic. 42 | #[derive(Debug)] 43 | pub struct App { 44 | state: SharedState, 45 | algorithm_thread: thread::JoinHandle<()>, 46 | } 47 | 48 | impl App { 49 | /// Creates a new app (with a state constructed from the given `array`) and 50 | /// starts an algorithm thread. This function is called `init` instead of 51 | /// `new` because it has side effects. 52 | pub fn init( 53 | algorithm: Box, 54 | array: Vec, 55 | speed: f64, 56 | ) -> Self { 57 | let array_len = array.len(); 58 | let colors = vec![TRANSPARENT; array_len]; 59 | 60 | let state = SharedState::new(State { 61 | time: 0.0, 62 | speed, 63 | paused: true, 64 | array, 65 | colors, 66 | array_accesses: vec![NO_ARRAY_ACCESS; array_len], 67 | }); 68 | 69 | let algorithm_state = state.clone(); 70 | 71 | let algorithm_thread = thread::Builder::new() 72 | .name("algorithm".to_string()) 73 | .spawn(move || { 74 | let array = Array::new(algorithm_state); 75 | array.wait(500); 76 | algorithm.sort(array); 77 | }) 78 | .unwrap(); 79 | 80 | Self { 81 | state, 82 | algorithm_thread, 83 | } 84 | } 85 | 86 | /// Draws the current [state](State). 87 | pub fn render( 88 | &mut self, 89 | args: RenderArgs, 90 | gl: &mut GlGraphics, 91 | glyphs: &mut GlyphCache<'_>, 92 | ) { 93 | gl.draw(args.viewport(), |ctx, gl| { 94 | use graphics::*; 95 | 96 | clear(BACKGROUND_COLOR, gl); 97 | 98 | // lock the state for the whole rendering cycle so that the algorithm 99 | // thread doesn't change something while the main thread is doing 100 | // rendering 101 | let state = self.state.get(); 102 | 103 | // transform of the bottom left point of the status text 104 | let status_text_transform = ctx.transform.trans( 105 | STATUS_TEXT_MARGIN, 106 | STATUS_TEXT_MARGIN + f64::from(STATUS_TEXT_FONT_SIZE), 107 | ); 108 | 109 | let status_text = format!( 110 | "paused = {}, speed = {}%", 111 | state.paused, 112 | state.speed * 100.0 113 | ); 114 | 115 | // draw the status text 116 | text::Text::new_color(WHITE, STATUS_TEXT_FONT_SIZE) 117 | .draw( 118 | &status_text, 119 | glyphs, 120 | &ctx.draw_state, 121 | status_text_transform, 122 | gl, 123 | ) 124 | .unwrap(); 125 | 126 | let len = state.array.len(); 127 | let max_value = *state.array.iter().max().unwrap_or(&0); 128 | 129 | // draws a rectangle with a given color which represents a value at a 130 | // specified index 131 | let mut draw_value = |index: usize, color: Color| { 132 | let value = state.array[index]; 133 | 134 | let window_w: f64 = args.width; 135 | let window_h: f64 = args.height; 136 | 137 | let array_y = 138 | STATUS_TEXT_MARGIN * 2.0 + f64::from(STATUS_TEXT_FONT_SIZE); 139 | 140 | let array_h = window_h - array_y; 141 | 142 | let w = window_w / (len as f64); 143 | let h = f64::from(value) * array_h / f64::from(max_value); 144 | let x = (index as f64) * w; 145 | let y = window_h - h; 146 | 147 | rectangle(color, [x, y, w, h], ctx.transform, gl); 148 | }; 149 | 150 | // draw all values 151 | for index in 0..len { 152 | draw_value(index, VALUE_COLOR); 153 | } 154 | 155 | // draw array accesses 156 | for (index, access_time) in state.array_accesses.iter().enumerate() { 157 | if *access_time < 0.0 { 158 | continue; 159 | } 160 | 161 | let mut color = ACCESSED_VALUE_COLOR; 162 | 163 | let access_age = state.time - access_time; 164 | // map age of this access to the [1.0, 0.0] interval of the alpha (transparency) component 165 | // so that new accesses are opaque and old ones are transparent 166 | let alpha = (1.0 - access_age / ACCESSED_VALUE_TIMEOUT) as f32; 167 | 168 | color[color.len() - 1] = alpha; 169 | draw_value(index, color); 170 | } 171 | 172 | // draw colored overlays (marks) for some values 173 | for (index, color) in state.colors.iter().enumerate() { 174 | draw_value(index, *color); 175 | } 176 | }); 177 | } 178 | 179 | /// Advances the [state](State) by a given amount of [time](UpdateArgs::dt). 180 | pub fn update(&mut self, args: UpdateArgs) { 181 | let mut state = self.state.get(); 182 | 183 | if !state.paused { 184 | state.time += args.dt * state.speed; 185 | } 186 | 187 | // time is copied (f64 implements the Copy trait) to a variable because it 188 | // can't be accessed when array_accesses is borrowed mutably 189 | let time = state.time; 190 | for access_time in state.array_accesses.iter_mut() { 191 | if time - *access_time > ACCESSED_VALUE_TIMEOUT { 192 | *access_time = NO_ARRAY_ACCESS; 193 | } 194 | } 195 | } 196 | 197 | /// Handles user input and updates the [state](State). 198 | /// 199 | /// # Controls 200 | /// 201 | /// | Key | Action | 202 | /// | ---------------------- | ------------ | 203 | /// | Space | pause/resume | 204 | /// | ↑ | 2x faster | 205 | /// | ↓ | 2x slower | 206 | pub fn button(&mut self, args: ButtonArgs) { 207 | let mut state = self.state.get(); 208 | 209 | // import commonly used enum values in the current scope 210 | use self::Button::Keyboard; 211 | use self::ButtonState::Press; 212 | 213 | match (args.button, args.state) { 214 | (Keyboard(Key::Space), Press) => { 215 | state.paused = !state.paused; 216 | self.algorithm_thread.thread().unpark(); 217 | } 218 | 219 | (Keyboard(Key::Up), Press) => state.speed *= SPEED_FACTOR, 220 | (Keyboard(Key::Down), Press) => state.speed /= SPEED_FACTOR, 221 | 222 | _ => {} 223 | }; 224 | } 225 | } 226 | -------------------------------------------------------------------------------- /src/array.rs: -------------------------------------------------------------------------------- 1 | //! The [`Array`](crate::array::Array) struct. 2 | 3 | use graphics::color::TRANSPARENT; 4 | use graphics::types::Color; 5 | 6 | use crate::state::SharedState; 7 | 8 | /// A convenient wrapper around [`SharedState`] for 9 | /// [algorithms](crate::algorithms) that handles concurrency and all that stuff. 10 | /// **All methods in this struct lock the [state](crate::state::State) for as 11 | /// short as possible** so that the rendering thread can lock it when it wants. 12 | #[derive(Debug, Clone)] 13 | pub struct Array(SharedState); 14 | 15 | impl Array { 16 | /// Creates a new array from a copy of [`SharedState`]. 17 | pub fn new(state: SharedState) -> Self { 18 | Array(state) 19 | } 20 | 21 | /// Puts the current thread to sleep for the specified amount of time and 22 | /// blocks it if the animation is [paused](crate::state::State::paused). 23 | pub fn wait(&self, ms: u64) { 24 | use std::thread; 25 | use std::time::Duration; 26 | 27 | // state must be locked for as short as possible so we shouldn't keep it 28 | // locked while sleeping (`thread::sleep` and `thread::park`) 29 | 30 | thread::sleep(Duration::from_micros({ 31 | let state = self.0.get(); 32 | (ms as f64 * 1000.0 / state.speed) as u64 33 | })); 34 | 35 | let paused = { 36 | let state = self.0.get(); 37 | state.paused 38 | }; 39 | 40 | if paused { 41 | thread::park(); 42 | } 43 | } 44 | 45 | /// Returns the length of the underlying [vector](crate::state::State::array). 46 | pub fn len(&self) -> usize { 47 | let state = self.0.get(); 48 | state.array.len() 49 | } 50 | 51 | /// Returns a value at a given index. 52 | pub fn get(&self, index: usize) -> u32 { 53 | let mut state = self.0.get(); 54 | let value = state.array[index]; 55 | 56 | state.array_accesses[index] = state.time; 57 | 58 | value 59 | } 60 | 61 | /// Sets a value of the at a given index. 62 | pub fn set(&self, index: usize, value: u32) { 63 | let mut state = self.0.get(); 64 | state.array[index] = value; 65 | 66 | state.array_accesses[index] = state.time; 67 | } 68 | 69 | /// Swaps two values at given indices. 70 | pub fn swap(&self, a: usize, b: usize) { 71 | let mut state = self.0.get(); 72 | state.array.swap(a, b); 73 | } 74 | 75 | // /// Reverses the Array. 76 | // pub fn reverse(&self) { 77 | // let mut state = self.0.get(); 78 | // state.array.reverse(); 79 | // } 80 | 81 | /// Shuffles the Array. 82 | pub fn shuffle(&self) { 83 | use rand::{thread_rng, Rng}; 84 | let mut state = self.0.get(); 85 | thread_rng().shuffle(&mut state.array); 86 | } 87 | 88 | /// Resets color of the value at a given index (sets it to the transparent 89 | /// color). 90 | /// 91 | /// _See_ [`State.colors`](crate::state::State::colors) 92 | pub fn reset_color(&self, index: usize) { 93 | self.set_color(index, TRANSPARENT); 94 | } 95 | 96 | /// Sets color of the value at a given index. 97 | /// 98 | /// _See_ [`State.colors`](crate::state::State::colors) 99 | pub fn set_color(&self, index: usize, color: Color) { 100 | let mut state = self.0.get(); 101 | state.colors[index] = color; 102 | } 103 | } 104 | -------------------------------------------------------------------------------- /src/cli.rs: -------------------------------------------------------------------------------- 1 | //! Command-line interface and command-line argument parsing. Uses [clap] under 2 | //! the hood. 3 | 4 | use crate::algorithms::{self, Algorithm}; 5 | 6 | /// [Internal name](clap::Arg::with_name) of the 7 | /// [algorithm](Options::algorithm) argument which is used to 8 | /// [get its value](clap::ArgMatches::value_of). 9 | const ALGORITHM_ARG: &str = "ALGORITHM"; 10 | /// [Internal name](clap::Arg::with_name) of the 11 | /// [`--length`/`-l`](Options::length) option which is used to 12 | /// [get its value](clap::ArgMatches::value_of). 13 | const LENGTH_OPT: &str = "LENGTH"; 14 | /// [Internal name](clap::Arg::with_name) of the 15 | /// [`--order`/`-o`](Options::order) option which is used to 16 | /// [get its value](clap::ArgMatches::value_of). 17 | const ORDER_OPT: &str = "ORDER"; 18 | /// [Internal name](clap::Arg::with_name) of the 19 | /// [`--speed`/`-s`](Options::speed) option which is used to 20 | /// [get its value](clap::ArgMatches::value_of). 21 | const SPEED_OPT: &str = "SPEED"; 22 | /// [Internal name](clap::Arg::with_name) of the 23 | /// `--list` option which is used to 24 | /// [get its value](clap::ArgMatches::value_of). 25 | const LIST_OPT: &str = "LIST"; 26 | 27 | /// Contains all options that can be provided by a user using the CLI. 28 | pub struct Options { 29 | /// Instance of a sorting [algorithm](Algorithm) struct. 30 | pub algorithm: Box, 31 | /// Number of elements in the [array](crate::array::Array). 32 | pub length: u32, 33 | /// Order of elements in the [array](crate::array::Array). 34 | pub order: Order, 35 | /// [Speed](crate::state::State::speed) factor. 36 | pub speed: f64, 37 | } 38 | 39 | /// Order of elements in the [array](crate::array::Array). 40 | pub enum Order { 41 | /// Sorted in the ascending order. 42 | Sorted, 43 | /// Sorted in the descending order. 44 | Reversed, 45 | /// [Shuffled](rand::Rng::shuffle). 46 | Shuffled, 47 | } 48 | 49 | /// Parses command-line arguments into [`Options`]. **If the help/version is 50 | /// printed or an error occurs, it will be displayed to the user and the process 51 | /// will exit.** 52 | /// 53 | /// _See_ [`clap::App.get_matches`](clap::App::get_matches) 54 | pub fn parse_options() -> Options { 55 | use clap::*; 56 | 57 | let mut algorithms = algorithms::all(); 58 | let algorithm_ids: Vec<&str> = 59 | algorithms.keys().map(|s| &s as &str).collect(); 60 | 61 | let parser = app_from_crate!() 62 | .setting(AppSettings::NextLineHelp) 63 | .setting(AppSettings::ColoredHelp) 64 | .arg( 65 | Arg::with_name(LIST_OPT) 66 | .long("list") 67 | .help("lists all available algorithms"), 68 | ) 69 | .arg( 70 | Arg::with_name(LENGTH_OPT) 71 | .short("l") 72 | .long("length") 73 | .help("Sets number of elements in the array") 74 | .default_value("100"), 75 | ) 76 | .arg( 77 | Arg::with_name(ORDER_OPT) 78 | .short("o") 79 | .long("order") 80 | .help("Sets order of elements in the array") 81 | .possible_values(&["sorted", "reversed", "shuffled"]) 82 | .case_insensitive(true) 83 | .default_value("shuffled"), 84 | ) 85 | .arg( 86 | Arg::with_name(ALGORITHM_ARG) 87 | .help("Sets sorting algorithm") 88 | .possible_values(&algorithm_ids) 89 | .case_insensitive(true) 90 | .required_unless(LIST_OPT), 91 | ) 92 | .arg( 93 | Arg::with_name(SPEED_OPT) 94 | .short("s") 95 | .long("speed") 96 | .help("Sets animation speed") 97 | .default_value("1.0"), 98 | ); 99 | 100 | let matches = parser.get_matches(); 101 | 102 | if matches.is_present(LIST_OPT) { 103 | println!("Available algorithms:"); 104 | for id in algorithm_ids { 105 | println!("- {}", id); 106 | } 107 | 108 | use std::process; 109 | process::exit(0); 110 | } 111 | 112 | // all option values can be safely unwrapped here because their corresponding 113 | // options are either required or have a default value 114 | Options { 115 | algorithm: { 116 | let id = matches.value_of(ALGORITHM_ARG).unwrap(); 117 | // remove may seem a bit odd here but it's the only safe and logical (if 118 | // you think about it) way to get the ownership of a value which is inside 119 | // of a container (i.e. HashMap, Vec etc) 120 | algorithms.remove(id).unwrap() 121 | }, 122 | 123 | length: value_t_or_exit!(matches, LENGTH_OPT, u32), 124 | 125 | order: match matches.value_of(ORDER_OPT).unwrap() { 126 | "sorted" => Order::Sorted, 127 | "reversed" => Order::Reversed, 128 | "shuffled" => Order::Shuffled, 129 | _ => unreachable!(), 130 | }, 131 | 132 | speed: value_t_or_exit!(matches, SPEED_OPT, f64), 133 | } 134 | } 135 | -------------------------------------------------------------------------------- /src/main.rs: -------------------------------------------------------------------------------- 1 | #![cfg_attr(feature = "doc", feature(external_doc))] 2 | #![cfg_attr(feature = "doc", doc(include = "../README.md"))] 3 | 4 | use failure::{Error, ResultExt}; 5 | 6 | use opengl_graphics::*; 7 | use piston::event_loop::*; 8 | use piston::input::*; 9 | use piston::window::WindowSettings; 10 | use sdl2_window::Sdl2Window as Window; 11 | 12 | mod algorithms; 13 | mod app; 14 | mod array; 15 | mod cli; 16 | mod state; 17 | 18 | use crate::app::App; 19 | use crate::cli::{Options, Order}; 20 | 21 | /// Required version of OpenGL. 22 | /// 23 | /// _Note:_ change this to [`OpenGL::V2_1`] if it doesn't work. 24 | const OPENGL_VERSION: OpenGL = OpenGL::V3_2; 25 | 26 | /// Title of the main window. 27 | const WINDOW_TITLE: &str = clap::crate_name!(); 28 | /// Initial size of the main window. 29 | const WINDOW_SIZE: (u32, u32) = (640, 480); 30 | 31 | fn main() { 32 | if let Err(error) = run() { 33 | eprintln!("error: {}", error); 34 | 35 | for cause in error.iter_causes() { 36 | eprintln!("caused by: {}", cause); 37 | } 38 | 39 | eprintln!("{}", error.backtrace()); 40 | eprintln!( 41 | "note: Run with `RUST_BACKTRACE=1` if you don't see a backtrace." 42 | ); 43 | 44 | use std::process; 45 | process::exit(1); 46 | } 47 | } 48 | 49 | fn run() -> Result<(), Error> { 50 | let Options { 51 | algorithm, 52 | length, 53 | order, 54 | speed, 55 | } = cli::parse_options(); 56 | 57 | let window_title = format!("{} - {}", WINDOW_TITLE, algorithm.name()); 58 | let mut window: Window = WindowSettings::new(window_title, WINDOW_SIZE) 59 | .opengl(OPENGL_VERSION) 60 | .exit_on_esc(true) 61 | .vsync(true) 62 | .build() 63 | // convert `Result<_, String>` to `Result<_, Error>` 64 | .map_err(|e| failure::format_err!("{}", e)) 65 | .context("couldn't create window")?; 66 | let mut gl = GlGraphics::new(OPENGL_VERSION); 67 | 68 | let mut array: Vec = (1..=length).collect(); 69 | 70 | match order { 71 | Order::Sorted => {} 72 | Order::Reversed => array.reverse(), 73 | Order::Shuffled => { 74 | use rand::{thread_rng, Rng}; 75 | thread_rng().shuffle(&mut array); 76 | } 77 | } 78 | 79 | // load font for the status text 80 | let font = include_bytes!("../assets/Menlo-Regular.ttf"); 81 | let mut glyphs = GlyphCache::from_bytes(font, (), TextureSettings::new()) 82 | // `GlyphCache::from_bytes` returns `Err(())` when an error occurs, so it's 83 | // replaced with an error with a meaningful message here 84 | .map_err(|_| failure::format_err!("couldn't load font"))?; 85 | 86 | // preload printable ASCII chars for faster rendering 87 | glyphs 88 | .preload_printable_ascii(app::STATUS_TEXT_FONT_SIZE) 89 | // convert `Result<_, String>` to `Result<_, Error>` 90 | .map_err(|e| failure::format_err!("{}", e)) 91 | .context("couldn't preload printable ASCII chars")?; 92 | 93 | let mut app = App::init(algorithm, array, speed); 94 | 95 | println!("Press [Space] to pause/resume"); 96 | println!("Press [Up] to speed up"); 97 | println!("Press [Down] to slow down"); 98 | println!(); 99 | 100 | let mut events = Events::new(EventSettings::new()); 101 | while let Some(event) = events.next(&mut window) { 102 | match event { 103 | Event::Loop(Loop::Render(args)) => app.render(args, &mut gl, &mut glyphs), 104 | Event::Loop(Loop::Update(args)) => app.update(args), 105 | Event::Input(Input::Button(args)) => app.button(args), 106 | _ => {} 107 | } 108 | } 109 | 110 | Ok(()) 111 | } 112 | -------------------------------------------------------------------------------- /src/state.rs: -------------------------------------------------------------------------------- 1 | //! Structs and type definitions that describe the app state. 2 | 3 | use std::sync::{Arc, Mutex, MutexGuard}; 4 | 5 | use graphics::types::Color; 6 | 7 | /// A wrapper around [`State`] that can be [safely shared](std::sync) between 8 | /// threads. 9 | #[derive(Debug, Clone)] 10 | pub struct SharedState(Arc>); 11 | 12 | impl SharedState { 13 | pub fn new(state: State) -> Self { 14 | SharedState(Arc::new(Mutex::new(state))) 15 | } 16 | 17 | pub fn get(&self) -> MutexGuard<'_, State> { 18 | self.0.lock().unwrap() 19 | } 20 | } 21 | 22 | /// Contains the state of the whole [app](crate::app::App). 23 | #[derive(Debug)] 24 | pub struct State { 25 | /// Current time in seconds. [Updated](crate::app::App::update) if the 26 | /// animation is not [paused](State::paused). 27 | pub time: f64, 28 | /// Speed factor (e.g. 1.0 - normal, 2.0 - 2x faster, 0.5 - 2x slower, etc). 29 | /// Affects the animation [time](State::time) and 30 | /// [delays](crate::array::Array::wait) in 31 | /// [algorithms](crate::algorithms::Algorithm). 32 | pub speed: f64, 33 | /// Is the animation paused? 34 | pub paused: bool, 35 | /// An array which is being sorted. 36 | pub array: Vec, 37 | /// Colored **overlays** of each value. **Overlay** means that these colors 38 | /// are _not_ used to [draw](crate::app::App::render) the values, instead 39 | /// they're drawn **over** the values. These colors can be used by an 40 | /// [algorithm](crate::algorithms::Algorithm) to highlight important array 41 | /// elements. 42 | /// 43 | /// The length of this vector is equal to the [array](State::array) 44 | /// length, so every color in this vector corresponds to a value with the 45 | /// exact same index. 46 | pub colors: Vec, 47 | /// Contains timestamps of the most recent array accesses of every element, 48 | /// which are drawn like [colored overlays](State::colors). The length of this 49 | /// vector is equal to the [array](State::array) length, so for every element 50 | /// in the [array](State::array) _only the most recent_ timestamp is stored 51 | /// here (not a big deal), so we can avoid memory allocations while program is 52 | /// running, and this is a pretty simple optimization. To optimize things even 53 | /// further I've done this: if an element hasn't been accessed yet or it has 54 | /// been accessed [long ago](crate::app::ACCESSED_VALUE_TIMEOUT), then instead 55 | /// of using an `Option` type for every element, I use negative values 56 | /// because they don't make any sense in the context of time (this saves 57 | /// [8 bytes](https://play.rust-lang.org/?version=stable&mode=debug&edition=2018&gist=0e335d0d6109850c7df766fd131c8916) 58 | /// for every element). When an [algorithm](crate::algorithms::Algorithm) 59 | /// [reads](crate::array::Array::get) or [writes](crate::array::Array::set) a 60 | /// value at a certain index from/to the array, the current 61 | /// [time](State::time) is stored at exactly the same index in this vector. 62 | pub array_accesses: Vec, 63 | } 64 | 65 | /// A constant that means "there's no array access here". _See_ documentation of 66 | /// [`State.array_accesses`](State::array_accesses) to understand why this 67 | /// constant is a negative number. 68 | pub const NO_ARRAY_ACCESS: f64 = -1.0; 69 | --------------------------------------------------------------------------------