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项目作者： samuelbigos

项目描述 ：
Godot plugin that generates a 2D navigation mesh from collsion nodes.
高级语言： GDScript
项目地址: git://github.com/samuelbigos/godot_2d_navmesh_generator.git
创建时间： 2020-11-23T23:00:38Z
项目社区：https://github.com/samuelbigos/godot_2d_navmesh_generator
开源协议：MIT License
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Godot 2D Navmesh Generator

Preview Image

A tool for generating a navigation mesh from collision data in a 2D scene. Implemented and tested in Godot 3.2.3.

PRs are welcome, no guarantees on a swift review though.

Installation

If your Godot project is tracked with Git, it is recommended to install this as a Git submodule. This means you can easily pull down updates. From your project root:

  1. git submodule add https://github.com/samuelbigos/godot_2d_navmesh_generator addons/godot_2d_navmesh_generator

If you’re not tracking on Git, download the repo and place into the ‘addons/godot_2d_navmesh_generator’ directory.

Usage

  1. Add a NavigationPolygonInstance to your scene (see documentation).
  2. In the Inspector menu, add a new NavigationPolygon and make sure it’s selected.
  3. In the bottom panel you should see a tab NavmeshGen. Click it.
  4. Use this menu to generate a mesh for your NavigatonPolygon.

Demo

A demo project is included (2d_navmesh_generator_demo.zip), it includes basic navmesh agent and some collision shapes to generate a navmesh from.

Known Issues and Gotchas

  • ‘Holes’ in topology are not supported (yet). This means if you have a donut shape, the hole will be filled in. The solution for now is to leave a gap somewhere (and make it big enough for your agent width), then fill in the gap manually.
  • After generating, re-select the NavigationPolygonInstance node a few times in the editor to bring up the polygon editing interface.
  • Settings are not saved and will reset to default when re-selecting the node.
  • Generation time cost increases with square of scene size, which can be unoptimal for large scenes. Try and split your scenes up into multiple navmeshes if possible.
  • Works better if most straight lines are axis-aligned. This is because the scene is rasterized before being converted to a mesh, and diagonal lines introduce aliasing.
  • Only tested on Godot 3.2.3 and GLES3, might not work on other versions.

Next Steps

  • Fix known issues.
  • Create an API to generate programatically (for procedurally generated scenes).
  • Port to GDNative for performance.
  • Clean up and properly comment code.
  • Suggestions welcome!

Changelog

v0.1: Initial release for Godot 3.2.3

  • Initial release.