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Question by wedermarco · Dec 05, 2020 at 10:18 PM · physicsraycastrays

Raycast are not always updating in FixedUpdate

Hello, I've got a problem with raycasts. I know that they are a physic object and physics are always update in fixed update.

In my application I have a rubik's cube that can rotate all of its sides. After every rotation I want to know which faces are facing towards the camera. For this I'm using raycasts.

Unfortunately, in about 1 of 20 cases, the raycasts didn't update and the old faces are still being detected and this messes up my whole "game".

I have to use a coroutine because I also rely on WaitForEndOfFrame. Every time before I check for the front facing fields of the cube, I make WaitForFixedUpdate.

What I've already tried: - adding rigidbodys to each face (with IsKinematic set to true and CollisionDetection set to Continous Dynamic)

 // Rotate one side of the rubik's cube
 afterCube.MakeFastCubeRotation(currentRotation);
 
 // Wait for fixed update to update the world faces 
 yield return waitForFixedUpdate;
 
 // Saves all faces that are facing towards the camera now
 afterCube.UpdateFrontFacingSquares();

I can't fix this problem. Does anyone of you know what I could do or what I may be doing wrong? The only thing that I can think of is that sometimes the cube rotates in fixed update and if it's already in fixed update, it doesn't wait for the next fixed update to check for the new faces but I don't know if that is possible.

(For info: only the cube rotates, the raycasts are always at the same position and are facing the same direction)

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