https://github.com/danini-the-panini/gosu_lighting

Simple vector-based lighting for libgosu
https://github.com/danini-the-panini/gosu_lighting

Last synced: about 1 month ago
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Simple vector-based lighting for libgosu

• Host: GitHub
• URL: https://github.com/danini-the-panini/gosu_lighting
• Owner: danini-the-panini
• Created: 2015-01-29T06:50:53.000Z (almost 10 years ago)
• Default Branch: master
• Last Pushed: 2015-02-05T22:05:09.000Z (almost 10 years ago)
• Last Synced: 2024-11-18T12:09:40.385Z (about 2 months ago)
• Language: Ruby
• Size: 1.22 MB
• Stars: 0
• Watchers: 0
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
Gosu Lighting

=============

Simple vector-based lighting for libgosu.

![alt tag](https://raw.github.com/jellymann/gosu_lighting/master/example.png)

How to use

----------

```

$ gem install gosu_lighting

```

Include the Circle and Rectangle module into your own circle and rectangle classes. Your circle class _MUST_ have x, y, and radius properties, and your rectangle class _MUST_ have x, y, width, and height properties. Both your circle and rectangle classes must implement a `draw` method that takes a `depth` argument.

To draw circles and rectangles and everything with lighting and shadows, put it in the light source `draw` block and call the circle/rectangle `draw_lit` method with the light source instance, which is passed to the block for convenience.

Here's a trivial example:

```ruby

require 'gosu'

require 'gosu_lighting'

class MyCircle < Struct.new(:x, :y, :radius)

  include GosuLghting::Circle

  def draw depth

    # your own drawing logic

    # use depth to make the object get 'shadowed' by other objects

  end

end

class MyRectangle < Struct.new(:x, :y, :width, :height)

  include GosuLghting::Rectangle

  def draw depth

    # your own drawing logic

  end

end

class MyGame < Gosu::Window

  def init

    @light_source = GosuLighting::Source.new x, y, radius

    @circle = MyCircle.new(...)

    @rectangle = MyRectangle.new(...)

  end

  def draw

    @light_source.draw do |ls|

      @circle.draw_lit ls

      @rectandle.draw_lit ls

    end

  end

end

```

Limitations

-----------

1. Only handles circles and axis-aligned rectangles

2. Only really works with one light source