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root = true |
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|
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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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/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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|
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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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language: crystal |
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The MIT License (MIT) |
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|
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Copyright (c) 2018 Danila Fedorin |
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|
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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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|
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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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|
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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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# golden-color |
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|
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A simple shard to generate colors using the golden ratio method. |
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|
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## Installation |
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|
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Add this to your application's `shard.yml`: |
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|
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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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|
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## Usage |
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|
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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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|
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```crystal |
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require "golden-color" |
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|
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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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|
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## Contributing |
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|
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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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|
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## Contributors |
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|
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- [DanilaFe](https://dev.danilafe.com/DanilaFe) Danila Fedorin - creator, maintainer |
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name: golden-color |
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version: 0.1.0 |
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|
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authors: |
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- Danila Fedorin <danila.fedorin@gmail.com> |
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|
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crystal: 0.26.1 |
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|
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license: MIT |
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require "./spec_helper" |
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|
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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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|
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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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|
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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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require "spec" |
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require "../src/golden-color" |
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module GoldenColor |
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VERSION = "0.1.0" |
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|
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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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|
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def initialize(@r = 0, @g = 0, @b = 0) |
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end |
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|
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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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|
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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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|
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self.new(r + m, g + m, b + m) |
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end |
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|
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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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|
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class ColorGen |
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getter seed : Float64 |
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|
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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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|
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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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