42 lines
1.7 KiB
Markdown
42 lines
1.7 KiB
Markdown
# kiwi-java
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[](https://travis-ci.org/alexbirkett/kiwi-java)
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A Java port of the [Kiwi C++](https://github.com/nucleic/kiwi) implementation of the Cassowary constraint solving algorithm
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## Background
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This project was created by porting [Kiwi](https://github.com/nucleic/kiwi) line for line to Java. The objective is to create a faster Java implementation of the Cassowary constraint solving algorithm.
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## History
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The initial porting work was done in a weekend in at the end of January 2015 by Alex Birkett without a deep understanding of the Cassowary algorithm.
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At that time, the tests ported from the [java cassowary project](https://github.com/pybee/cassowary-java), did not pass.
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The project was forgotten about until early 2016 when [yonsunCN](https://github.com/yongsunCN) found it and fixed it.
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As of January 2016, the testes ported from [java cassowary project](https://github.com/pybee/cassowary-java) now pass.
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## Contributors
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* [Alex Birkett](https://github.com/alexbirkett) Initial port from Kiwi C++
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* [yonsunCN](https://github.com/yongsunCN) Fixed initial port
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* [Sam Twidale](https://github.com/Tw1ddle) Multiple bug fixes
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## Example usage
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Solver solver = new Solver();
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Variable x = new Variable("x");
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Variable y = new Variable("y");
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// x = 20
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solver.addConstraint(Symbolics.equals(x, 20));
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// x + 2 == y + 10
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solver.addConstraint(Symbolics.equals(Symbolics.add(x,2), Symbolics.add(y, 10)));
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solver.updateVariables();
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System.out.println("x " + x.getValue() + " y " + y.getValue());
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// x == 20
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// y == 12
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