Continuous Action Game -- Implementation Help

[ghimiremukesh]

Previously, I implemented a simple continuous action game by discretizing the action space, but now I’d like to test algorithms that directly handle continuous action spaces (e.g., PPO, MMD).

My game involves two players moving simultaneously on a 2D grid, with actions represented as 2D accelerations. In my naive implementation, I attempted to pass the 2D action directly to the _apply_actions(self, actions) method instead of using an index. However, I discovered that the method only accepts int types for actions.

Has anyone tackled this before or have any tips on implementing continuous action games in OpenSpiel?

Thanks in advance!