97 lines
4.8 KiB
Markdown
97 lines
4.8 KiB
Markdown
<img align="right" width="100" height="100" src="https://user-images.githubusercontent.com/37786733/41541140-71602302-731a-11e8-9434-79b3a57292b6.png">
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[](https://discord.gg/qgPrHv4)
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[](https://github.com/Siccity/xNode/issues)
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[](https://raw.githubusercontent.com/Siccity/xNode/master/LICENSE.md)
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[](https://github.com/Siccity/xNode/wiki)
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[](https://openupm.com/packages/com.github.siccity.xnode/)
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[Downloads](https://github.com/Siccity/xNode/releases) / [Asset Store](http://u3d.as/108S) / [Documentation](https://github.com/Siccity/xNode/wiki)
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Support xNode on [Ko-fi](https://ko-fi.com/Z8Z5DYWA) or [Patreon](https://www.patreon.com/thorbrigsted)
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### xNode
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Thinking of developing a node-based plugin? Then this is for you. You can download it as an archive and unpack to a new unity project, or connect it as git submodule.
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xNode is super userfriendly, intuitive and will help you reap the benefits of node graphs in no time.
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With a minimal footprint, it is ideal as a base for custom state machines, dialogue systems, decision makers etc.
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<p align="center">
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<img src="https://user-images.githubusercontent.com/6402525/53689100-3821e680-3d4e-11e9-8440-e68bd802bfd9.png">
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</p>
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### Key features
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* Lightweight in runtime
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* Very little boilerplate code
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* Strong separation of editor and runtime code
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* No runtime reflection (unless you need to edit/build node graphs at runtime. In this case, all reflection is cached.)
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* Does not rely on any 3rd party plugins
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* Custom node inspector code is very similar to regular custom inspector code
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* Supported from Unity 5.3 and up
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### Wiki
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* [Getting started](https://github.com/Siccity/xNode/wiki/Getting%20Started) - create your very first node node and graph
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* [Examples branch](https://github.com/Siccity/xNode/tree/examples) - look at other small projects
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### Installing with Unity Package Manager
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***Via Git URL***
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*(Requires Unity version 2018.3.0b7 or above)*
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To install this project as a [Git dependency](https://docs.unity3d.com/Manual/upm-git.html) using the Unity Package Manager,
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add the following line to your project's `manifest.json`:
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```
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"com.github.siccity.xnode": "https://github.com/siccity/xNode.git"
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```
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You will need to have Git installed and available in your system's PATH.
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If you are using [Assembly Definitions](https://docs.unity3d.com/Manual/ScriptCompilationAssemblyDefinitionFiles.html) in your project, you will need to add `XNode` and/or `XNodeEditor` as Assembly Definition References.
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***Via OpenUPM***
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The package is available on the [openupm registry](https://openupm.com). It's recommended to install it via [openupm-cli](https://github.com/openupm/openupm-cli).
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```
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openupm add com.github.siccity.xnode
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```
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### Node example:
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```csharp
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// public classes deriving from Node are registered as nodes for use within a graph
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public class MathNode : Node {
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// Adding [Input] or [Output] is all you need to do to register a field as a valid port on your node
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[Input] public float a;
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[Input] public float b;
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// The value of an output node field is not used for anything, but could be used for caching output results
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[Output] public float result;
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[Output] public float sum;
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// The value of 'mathType' will be displayed on the node in an editable format, similar to the inspector
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public MathType mathType = MathType.Add;
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public enum MathType { Add, Subtract, Multiply, Divide}
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// GetValue should be overridden to return a value for any specified output port
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public override object GetValue(NodePort port) {
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// Get new a and b values from input connections. Fallback to field values if input is not connected
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float a = GetInputValue<float>("a", this.a);
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float b = GetInputValue<float>("b", this.b);
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// After you've gotten your input values, you can perform your calculations and return a value
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if (port.fieldName == "result")
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switch(mathType) {
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case MathType.Add: default: return a + b;
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case MathType.Subtract: return a - b;
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case MathType.Multiply: return a * b;
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case MathType.Divide: return a / b;
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}
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else if (port.fieldName == "sum") return a + b;
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else return 0f;
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}
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}
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```
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Join the [Discord](https://discord.gg/qgPrHv4 "Join Discord server") server to leave feedback or get support.
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Feel free to also leave suggestions/requests in the [issues](https://github.com/Siccity/xNode/issues "Go to Issues") page.
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