#Collision Detection Problem - LibGDX

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rigid dragon
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Hi, I am working on a game based in LibGDX. I am trying to add a system that checks if there is floor below the player. I wrote a code but when i ran it. The player can slip off the walls in the tile map.

proud quartzBOT
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<@&987246399047479336> please have a look, thanks.

rigid dragon
proud quartzBOT
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Here is an AI assisted attempt to answer your question 🤖. Maybe it helps! In any case, a human is on the way 👍. To continue talking to the AI, you can use </chatgpt:1108714622413963314>.

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TJ-Bot
Hi, I am working on a game based in **LibGDX**. I am trying to add a system that checks if there is floor below the player. I wrote a code but when i ran it. The player can *slip off the walls* in the tile map.

Your collision detection approach seems to miss proper edge handling against walls, causing the player to slip off. In LibGDX, it's important to:

  • Use precise bounding shapes for your player and floor/wall objects, usually Rectangle or Polygon.
  • Check for collisions only against the floor layer, ignoring walls if your intent is to detect floor presence below.
  • In your isOnFloor() or similar method, cast a short downward ray or offset a small rectangle just below the player's bounding box, and then test overlap/intersection with floor tiles.
  • Make sure horizontal velocity or slight movements don't falsely 'push' the player off the floor due to bounding box misalignment.
  • Consider using Box2D physics if you need robust collision detection and response instead of manual checks.

Without seeing the exact code, likely issues could be you are checking collisions against the entire map (including walls), or your floor detection ray/box is too narrow or misplaced, leading to false negatives and slipping behavior.

Useful links:

- AI generated response using gpt-4.1-mini model
proud quartzBOT
# rigid dragon

I uploaded your attachments as Gist. This makes them more accessible, for example to mobile users.