c9ee9025104413c6381852372bcd212018bd66ca
Two different issues were causing a path search to not explore cells in order of the cheapest estimated route first. This meant the search could sometimes miss a cheaper route and return a suboptimal path. - PriorityQueue had a bug which would cause it to not check some elements when restoring the heap property of its internal data structure. Failing to do this would invalidate the heap property, meaning it would not longer return the items in correct priority order. Additional tests ensure this is covered. - When a path search encountered the same cell again with a lower cost, it would not update the priority queue with the new cost. This meant the cell was not explored early enough as it was in the queue with its original, higher cost. Exploring other paths might close off surrounding cells, preventing the cell with the lower cost from progressing. Instead we now add a duplicate with the lower cost to ensure it gets explored at the right time. We remove the duplicate with the higher cost in CanExpand by checking for already Closed cells.
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OpenRA
A Libre/Free Real Time Strategy game engine supporting early Westwood classics.
- Website: https://www.openra.net
- Chat: #openra on Libera (web) or Discord

- Repository: https://github.com/OpenRA/OpenRA
Please read the FAQ in our Wiki and report problems at https://github.com/OpenRA/OpenRA/issues.
Join the Forum for discussion.
Play
Distributed mods include a reimagining of
- Command & Conquer: Red Alert
- Command & Conquer: Tiberian Dawn
- Dune 2000
EA has not endorsed and does not support this product.
Check our Playing the Game Guide to win multiplayer matches.
Contribute
- Please read INSTALL.md and Compiling on how to set up an OpenRA development environment.
- See Hacking for a (now very outdated) overview of the engine.
- Read and follow our Code of Conduct.
- To get your patches merged, please adhere to the Contributing guidelines.
Mapping
- We offer a Mapping Tutorial as you can change gameplay drastically with custom rules.
- For scripted mission have a look at the Lua API.
- If you want to share your maps with the community, upload them at the OpenRA Resource Center.
Modding
- Download a copy of the OpenRA Mod SDK to start your own mod.
- Check the Modding Guide to create your own classic RTS.
- There exists an auto-generated Trait documentation to get started with yaml files.
- Some hints on how to create new OpenRA compatible Pixelart.
- Upload total conversions at our Mod DB profile.
Support
- Sponsor a mirror server if you have some bandwidth to spare.
- You can immediately set up a Dedicated Game Server.
License
Copyright 2007-2022 The OpenRA Developers (see AUTHORS) This file is part of OpenRA, which is free software. It is made available to you under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. For more information, see COPYING.
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