Create initial version of shard.
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commit
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9
.editorconfig
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.editorconfig
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root = true
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[*.cr]
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charset = utf-8
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end_of_line = lf
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insert_final_newline = true
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indent_style = space
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indent_size = 2
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trim_trailing_whitespace = true
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.gitignore
vendored
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.gitignore
vendored
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/docs/
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/lib/
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/bin/
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/.shards/
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*.dwarf
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# Libraries don't need dependency lock
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# Dependencies will be locked in application that uses them
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/shard.lock
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1
.travis.yml
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.travis.yml
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language: crystal
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21
LICENSE
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LICENSE
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The MIT License (MIT)
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Copyright (c) 2018 Danila Fedorin
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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README.md
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README.md
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# golden-color
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A simple shard to generate colors using the golden ratio method.
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## Installation
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Add this to your application's `shard.yml`:
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```yaml
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dependencies:
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golden-color:
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git: https://dev.danilafe.com/DanilaFe/golden-color
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```
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## Usage
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The first step to using golden-color is to create a color generator.
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The saturation and value parameters can be used to ajust the colors
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that are produced. Additionally, the seed parameter can be modified
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to change the starting hue. Colors can then be generated by repeated
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calls to "generate".
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```crystal
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require "golden-color"
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generator = GoldenColor::ColorGen.new saturation: 0.5, value: 0.95
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color = generator.generate
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```
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## Contributing
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1. Fork it
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2. Create your feature branch (`git checkout -b my-new-feature`)
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3. Commit your changes (`git commit -am 'Add some feature'`)
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4. Push to the branch (`git push origin my-new-feature`)
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5. Create a new Pull Request
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## Contributors
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- [DanilaFe](https://dev.danilafe.com/DanilaFe) Danila Fedorin - creator, maintainer
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shard.yml
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shard.yml
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name: golden-color
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version: 0.1.0
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authors:
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- Danila Fedorin <danila.fedorin@gmail.com>
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crystal: 0.26.1
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license: MIT
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spec/golden-color_spec.cr
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spec/golden-color_spec.cr
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require "./spec_helper"
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describe GoldenColor do
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describe ".from_rgb" do
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it "Correctly creates a color from red, green and blue" do
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c = GoldenColor::Color.from_rgb 0.0, 0.5, 1.0
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c.r.should eq 0.0
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c.g.should eq 0.5
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c.b.should eq 1.0
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end
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it "Correctly creates a color from hue, saturation and value" do
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c = GoldenColor::Color.from_hsv 0.0, 0.5, 0.95
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c.r.should eq 0.95
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c.g.should eq 0.475
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c.b.should eq 0.475
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end
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it "Correctly reports a tuple of red, green, and blue" do
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c = GoldenColor::Color.from_rgb 0.0, 0.5, 1.0
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r, g, b = c.rgb
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r.should eq c.r
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g.should eq c.g
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b.should eq c.b
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end
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end
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end
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spec/spec_helper.cr
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spec/spec_helper.cr
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require "spec"
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require "../src/golden-color"
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src/golden-color.cr
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src/golden-color.cr
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module GoldenColor
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VERSION = "0.1.0"
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struct Color
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getter r : Float64
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getter g : Float64
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getter b : Float64
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def initialize(@r = 0, @g = 0, @b = 0)
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end
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def self.from_rgb(r, g, b)
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self.new r, g, b
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end
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def self.from_hsv(h, s, v)
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h *= 6.0
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chroma = s * v
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x = chroma * (1.0 - (h.modulo(2.0) - 1.0).abs)
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r, g, b = if h >= 0.0 && h <= 1.0
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{chroma, x, 0.0}
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elsif h >= 1.0 && h <= 2.0
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{x, chroma, 0.0}
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elsif h >= 2.0 && h <= 3.0
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{0.0, chroma, x}
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elsif h >= 3.0 && h <= 4.0
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{0.0, x, chroma}
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elsif h >= 4.0 && h <= 5.0
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{x, 0.0, chroma}
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else
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{chroma, 0.0, x}
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end
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m = v - chroma
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self.new(r + m, g + m, b + m)
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end
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def rgb
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{ r, g, b }
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end
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end
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class ColorGen
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getter seed : Float64
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def initialize(@saturation = 0.5,
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@value = 0.95,
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@seed = Random.rand(1.0))
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end
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def generate
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color = Color.from_hsv @seed, @saturation, @value
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@seed = (@seed + 0.618033988749895).modulo(1.0)
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color
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end
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end
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end
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