Fix cooperative_pong ball bounce physics (v7) — supersedes #1336 - #1398
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Fix cooperative_pong ball bounce physics (v7) — supersedes #1336#1398RewardGuard wants to merge 2 commits into
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Kallinteris-Andreas
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@RewardGuard I apologize for the hassle, but could you please rebase your changes off main? |
The ball previously had its position clamped exactly to the colliding surface on a bounce, discarding the distance it had already overshot past the wall/paddle within that step. This made bounces lose energy/precision and could let the ball clip through fast collisions. Reflect the overshoot back out of the surface instead of clamping, in both the top/bottom wall handling (ball.py) and the paddle collision handling (paddle.py). Because this changes environment dynamics, bump cooperative_pong_v6 -> v7 and update all references, docs, tests and the env registry accordingly. Supersedes Farama-Foundation#1336, fixes Farama-Foundation#1289. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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@RewardGuard there's merge conflicts. |
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Description
Supersedes #1336 (which had merge conflicts and a failing CI) and fixes #1289.
Cooperative pong resolved collisions by snapping the ball's position exactly onto the colliding surface, throwing away the distance the ball had already travelled past the wall/paddle during that step. The correct behaviour is to reflect that overshoot back out of the surface, so the bounce conserves the ball's motion within the step.
This PR:
ball.py— reflects the overshoot on top/bottom wall bounces instead of clamping to the wall.paddle.py— reflects the overshoot on all four paddle-collision cases (left/right/top/bottom) instead of clamping to the paddle edge.cooperative_pong_v6→v7(the physics change alters environment dynamics) and updates every reference: the version module,all_modules.py, the env registry, docs, and tests.Rebased cleanly on current
main, so there are no merge conflicts (thepyproject.toml/pygame_init_testfixes that #1336 carried are already present onmain).Type of change
Checklist:
pytestfor the affected env (api_test,parallel_api_test,seed_testall pass forcooperative_pong_v7).🤖 Generated with Claude Code