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The Harvester trait and MoveAdjacentTo activity called the pathfinder but had a single source and multiple targets. The pathfinder interface only allows for the opposite: multiple sources and a single target. To work around this they would swap the inputs. This works in most cases but not all cases. One aspect of asymmetry is that an actor may move out of an inaccessible source cell, but not onto an inaccessible target cell. Searches that involved an inaccessible source cell and that applied this swapping method would therefore fail to return a path, when a valid path was possible. Although a rare case, once good way to reproduce is to use a production building that spawns actors on inaccessible cells around it, such as the RA naval yard. A move order uses the pathfinder correctly and the unit will move out. Using a force attack causes the unit to use the broken "swapped" mechanism in MoveAdjacentTo and it will be stuck. This asymmetry has been longstanding but the pathfinding infrastructure only sporadically accounted for it. It is now documented and applied consistently. Create a new overload on the pathfinder trait that allows a single source and multiple targets, so callers have an overload that does what they need and won't be tempted to swap the positions and run into this issue. Internally, this requires us to teach Locomotor to ignore the self actor when performing movement cost checks for these "in reverse" searches so the unit doesn't consider the cell blocked by itself.
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.
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Play
Distributed mods include a reimagining of
- Command & Conquer: Red Alert
- Command & Conquer: Tiberian Dawn
- Dune 2000
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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- See Hacking for a (now very outdated) overview of the engine.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.
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- You can immediately set up a Dedicated Game Server.
License
Copyright (c) OpenRA Developers and Contributors 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.