Merge branch 'release/1.0.1'

Cargo.toml

@@ -1,10 +1,9 @@
 [package]
 name = "polygon-art"
-version = "1.0.0"
+version = "1.0.1"
 authors = ["Ingolf Wagner <contact@ingolf-wagner.de>"]
 edition = "2018"
 
-
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 description = "Convenience library to use geo to create art."
 documentation = "https://github.com/mrVanDalo/polygon-art"

README.md

@@ -6,7 +6,15 @@ Convenience library to create art using [geo](https://georust.org/).
     * load SVGs
     * scaling
 
-# Asteroids
+# Binaries
+
+I deliver some binaries to give you an impression and ideas
+for your own images. 
+
+All binaries created by polygon art have the same
+command line interface.
+
+## Asteroids
 
 asteroids is an example binary which renders an
 image inspired by the
@@ -14,12 +22,55 @@ image inspired by the
 
 ![image](./images/asteroids.png)
 
-run `asteroids --help` to get information.
-All binaries created by polygon art have the same
-command line interface.
+## Rings
 
-# How to run examples
+![image](./images/rings.png)
+
+# How to run /examples
 
 ```
 cargo run --example clipping -- --help # run the examples/clipping
 ```
+# How to Build (with flakes)
+
+```shell
+nix build
+```
+
+# How to us it (with flakes)
+
+``` nix
+{
+  description = "example usage";
+  inputs.nixpkgs.url = "github:nixos/nixpkgs/nixos-21.05";
+  inputs.polygon-art.url = "git+https://git.ingolf-wagner.de/palo/polygon-art.git";
+  inputs.polygon-art.inputs.nixpkgs.follows = "nixpkgs";
+  outputs = { self, nixpkgs, polygon-art, ... }: {
+    nixosConfigurations.example = nixpkgs.lib.nixosSystem {
+      system = "x86_64-linux";
+      modules = [
+        ({ pkgs, ... }: {
+          nixpkgs.overlays = [
+            (_self: _super: {
+              polygon-art = polygon-art.packages.${pkgs.system};
+            })
+          ];
+          environment.systemPackages = [ pkgs.polygon-art.polygon-art ];
+        })
+      ];
+    };
+  };
+}
+```
+
+# How to update
+
+``` shell
+cargo update # to update Cargo.lock
+```
+and
+
+``` shell
+nix flake update # to update flake.lock
+nix build        # to verify if everything is ok
+```

default.nix

@@ -0,0 +1,36 @@
+{ rustPlatform,
+  lib,
+  cairo,
+  geos,
+  clipper,
+  clang,
+  pkg-config,
+  cmake,
+  openssl,
+  llvmPackages,
+  ... }:
+
+rustPlatform.buildRustPackage {
+
+  pname = "polygon-art";
+  version = "1.0.1";
+  src = ./.;
+  cargoSha256 = "0sgk4hw77cxqbqzd258fz67r7fpjblkm7cqh14n5f1c43y8vgxa0";
+  verifyCargoDeps = true;
+
+  # Needed so bindgen can find libclang.so
+  LIBCLANG_PATH = "${llvmPackages.libclang.lib}/lib";
+
+  buildInputs = [ cairo geos clipper openssl ];
+
+  nativeBuildInputs =
+    [ cmake llvmPackages.clang llvmPackages.libclang pkg-config ];
+
+  meta = with lib; {
+    description = "Framework with examples to generate plotter friendly SVGs";
+    homepage = "https://git.ingolf-wagner.de/palo/polygon-art.git";
+    license = licenses.gpl3Plus;
+    maintainers = [ maintainers.mrVanDalo ];
+  };
+}
+

flake.lock

@@ -0,0 +1,41 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "locked": {
+        "lastModified": 1631561581,
+        "narHash": "sha256-3VQMV5zvxaVLvqqUrNz3iJelLw30mIVSfZmAaauM3dA=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "7e5bf3925f6fbdfaf50a2a7ca0be2879c4261d19",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1632855891,
+        "narHash": "sha256-crW76mt9/kbUBiKy/KiSnsQ9JEYgD3StDuYAMVkTbM0=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "73086069ebd402e85eaa39c06aef33c2b917f532",
+        "type": "github"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "type": "indirect"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,15 @@
+{
+  description = "Framework with examples to generate plotter friendly SVGs";
+  inputs.flake-utils.url = "github:numtide/flake-utils";
+  outputs = { self, nixpkgs, flake-utils , ... }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = nixpkgs.legacyPackages.${system};
+        polygon-art = (pkgs.callPackage ./default.nix {});
+      in {
+        packages.polygon-art = polygon-art;
+        defaultPackage = polygon-art;
+        devShell = import ./shell.nix { inherit pkgs; };
+      }
+    );
+}

src/bin/rings.rs

@@ -0,0 +1,55 @@
+use geo::algorithm::rotate::{Rotate, RotatePoint};
+use geo::algorithm::translate::Translate;
+use geo::{polygon, Coordinate, MultiPolygon, Point};
+use geo_clipper::Clipper;
+use polygon_art::{Context, MergeExt, TranslateExt};
+use rand::prelude::StdRng;
+use rand::Rng;
+
+fn main() {
+    let mut context = Context::create();
+    context.translate_center();
+
+    let min = f64::min(context.width, context.height);
+    let number_of_rings = (min / 150.) as i32;
+
+    let mut radius = min / 2. - 5.;
+    for _ in 0..number_of_rings {
+        let ring_size = context.gen_rng().gen_range(10..(radius as i32 / 5)) as f64;
+        radius = radius - ring_size;
+        if radius < 10. {
+            break;
+        }
+        let polygons = generate_ring(&mut context.gen_rng(), radius, ring_size);
+        radius = radius - ring_size;
+        context.draw_multipolygon(&polygons);
+    }
+
+    context.render();
+}
+
+fn generate_ring(rng: &mut StdRng, radius: f64, ring_size: f64) -> MultiPolygon<f64> {
+    let main = polygon![
+    (x: 0.0, y:0.0),
+    (x: ring_size , y:0.0),
+    (x: ring_size , y:ring_size ),
+    (x: 0.0, y:ring_size ),
+    ]
+    .translate_center()
+    .rotate(30.)
+    .translate(0., radius);
+
+    let center_point = Point(Coordinate { x: 0., y: 0. });
+    let parts = rng.gen_range(20..120);
+    let rotation = 360. / parts as f64;
+    let direction = if rng.gen_bool(0.5) { -1. } else { 1. };
+    let fragment = main.difference(
+        &main.rotate_around_point(direction * rotation, center_point),
+        100.,
+    );
+    let mut polygons: MultiPolygon<f64> = MultiPolygon(Vec::new());
+    for index in 0..parts {
+        polygons.merge(&fragment.rotate_around_point(rotation * index as f64, center_point));
+    }
+    polygons
+}

src/context.rs

@@ -4,12 +4,12 @@ use geo::{polygon, LineString, MultiLineString, MultiPolygon, Polygon};
 use rand::rngs::StdRng;
 use rand::{Rng, SeedableRng};
 
-use crate::context::commandline::Opt;
+use crate::context::command_line_options::Opt;
 use crate::context::palette::Palette;
 use crate::context::renderer::{PngRenderContainer, RenderContainer, SvgRenderContainer};
 use iso8601::Date::*;
 
-pub mod commandline;
+pub mod command_line_options;
 pub mod palette;
 pub mod renderer;
 
@@ -116,7 +116,8 @@ impl Context {
         let opt = Opt::get_command_line_arguments();
         let line_size = opt.line_size.clone();
 
-        let mm = 3.779527547619048; // calculated with inkscape 1587.40157 (px) / 420 (mm) (from a3)
+        // todo : this is not correct
+        let mm = 2.8346456693; // 1mm = 2.8346456693pt
         let (mut height, mut width) = match opt.format {
             None => (f64::from(opt.height.clone()), f64::from(opt.width.clone())),
             Some(format) => match &format[..] {
@@ -128,6 +129,9 @@ impl Context {
             },
         };
 
+        print!("height: {}\n", height);
+        print!("width: {}\n", width);
+
         if opt.orientation == "portrait" {
             let cache = height;
             height = width;
@@ -150,11 +154,12 @@ impl Context {
         let mut rng = StdRng::seed_from_u64(random_seed);
 
         // color
-        let y: f32 = rng.gen(); // generates a float between 0 and 1
-        let hue: f32 = y * 360.0;
-        let saturation: f32 = f32::max(rng.gen(), 0.6);
-        let value: f32 = f32::max(rng.gen(), 0.6);
-        let palette = Palette::dark_on_bright(Palette::color(hue, saturation, value));
+        let main_color = Palette::random_color(StdRng::seed_from_u64(rng.gen()));
+        let palette = match &opt.color_type[..] {
+            "bright_on_dark" => Palette::bright_on_dark(main_color),
+            "dark_on_bright" => Palette::dark_on_bright(main_color),
+            _ => Palette::bright_on_dark(main_color),
+        };
 
         let render_container: Box<dyn RenderContainer> = if opt.output_type == "svg" {
             let svg_surface = SvgSurface::new(

src/context/command_line_options.rs

@@ -53,6 +53,14 @@ pub struct Opt {
     /// (must be ISO8601)
     #[structopt(long = "random-date", conflicts_with = "random-seed", parse(try_from_str = iso8601::date))]
     pub random_seed_date: Option<iso8601::Date>,
+
+    /// how to use color palette to draw image
+    #[structopt(
+        long,
+        possible_values=&["dark_on_bright", "bright_on_dark"],
+        default_value="dark_on_bright"
+    )]
+    pub color_type: String,
 }
 
 impl Opt {

src/context/palette.rs

@@ -1,5 +1,6 @@
 //! Color palate generator.
 
+use crate::RandomExt;
 use palette::rgb::Rgb;
 use palette::FromColor;
 use palette::Hsl;
@@ -19,21 +20,18 @@ impl Palette {
     /// and to color less.
     #[allow(dead_code)]
     pub fn random_color(mut rng: StdRng) -> Rgb {
-        //let mut rng = rand::thread_rng();
-        let y: f32 = rng.gen(); // generates a float between 0 and 1
-        let hue: f32 = y * 360.0;
-        let saturation: f32 = f32::max(rng.gen(), 0.6);
-        let value: f32 = f32::max(rng.gen(), 0.6);
-        //Rgb::from_linear(Hsv::new(hue, saturation, value).into_rgb())
+        let hue: f32 = rng.gen_interval(0., 360.);
+        let saturation: f32 = rng.gen_interval(0.9, 1.0);
+        let value: f32 = rng.gen_interval(0.8, 1.0);
         Palette::color(hue, saturation, value)
     }
+
     pub fn color(hue: f32, saturation: f32, value: f32) -> Rgb {
         Rgb::from_linear(Hsv::new(hue, saturation, value).into_rgb())
     }
 
     /// generate a palette from the tint and shade palette
-    /// algorithm. choose a dark background and a bright filling color
-    #[allow(dead_code)]
+    /// algorithm. choose a dark background, and a bright filling color
     pub fn bright_on_dark(input: Rgb) -> Palette {
         let tint_and_shade_palette = TintAndShadePalette::create(input);
         Palette {
@@ -43,7 +41,7 @@ impl Palette {
     }
 
     /// generate a palette from the tint and shade palette
-    /// algorithm. choose a bright background and a dark filling color
+    /// algorithm. choose a bright background, and a dark filling color
     pub fn dark_on_bright(input: Rgb) -> Palette {
         let tint_and_shade_palette = TintAndShadePalette::create(input);
         Palette {
@@ -54,8 +52,7 @@ impl Palette {
 }
 
 /// The Tint and Shade Palette from https://gitlab.com/cameralibre/tint-and-shade
-/// Thank you Sam
-#[allow(dead_code)]
+/// Thank you, Sam
 struct TintAndShadePalette {
     base_color: Rgb,
     base_tint_30: Rgb,

src/extensions.rs

@@ -1,3 +1,4 @@
 pub(crate) mod merge_ext;
+pub(crate) mod random_ext;
 pub(crate) mod scale_ext;
 pub(crate) mod translate_ext;

src/extensions/random_ext.rs

@@ -0,0 +1,49 @@
+use rand::rngs::StdRng;
+use rand::Rng;
+
+pub trait RandomExt<T> {
+    fn gen_interval(&mut self, min: T, max: T) -> T;
+}
+
+impl RandomExt<f32> for StdRng {
+    fn gen_interval(&mut self, min: f32, max: f32) -> f32 {
+        if min == max {
+            return min;
+        }
+        let minimum = f32::min(min, max);
+        let maximum = f32::max(min, max);
+        let diff = maximum - minimum;
+        let x: f32 = self.gen();
+        x * diff + minimum
+    }
+}
+
+impl RandomExt<f64> for StdRng {
+    fn gen_interval(&mut self, min: f64, max: f64) -> f64 {
+        if min == max {
+            return min;
+        }
+        let minimum = f64::min(min, max);
+        let maximum = f64::max(min, max);
+        let diff = maximum - minimum;
+        let x: f64 = self.gen();
+        x * diff + minimum
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use rand::prelude::StdRng;
+    use rand::{Rng, SeedableRng};
+
+    #[test]
+    fn test_gen() {
+        let random_seed = rand::random();
+        let mut rng = StdRng::seed_from_u64(random_seed);
+        for _ in 0..1000 {
+            let random_number: f64 = rng.gen();
+            assert!(random_number < 1.);
+            assert!(random_number > 0.);
+        }
+    }
+}

src/lib.rs

@@ -3,6 +3,7 @@ pub use crate::context::Context;
 
 mod extensions;
 pub use crate::extensions::merge_ext::MergeExt;
+pub use crate::extensions::random_ext::RandomExt;
 pub use crate::extensions::scale_ext::ScaleExt;
 pub use crate::extensions::translate_ext::TranslateExt;