How to limit game object's world position?

Questions & Answers
1

I’m trying to limit a sphere’s X position by using Mathf.Clamp but I can’t see what I’m doing wrong. Here’s my code:

		PlayerPos = gameObject.transform.position;

		// Screen Aspect Ratio Check

		bool AR169 = ScreenAspect == 16f / 9f;
		bool AR1610 = ScreenAspect == 16f / 10f;
		bool AR219 = ScreenAspect == 21f / 9f;
		bool AR54 = ScreenAspect == 5f / 4f;
		bool AR43 = ScreenAspect == 4f / 3f;
		bool AR32 = ScreenAspect == 3f / 2f;

		//Clamp X coordinate according with screen aspect ratio

		if (AR169 == true) {
			Mathf.Clamp (PlayerPos.x, -3.75f, 3.75f);
		} else if (AR1610 == true) {
			Mathf.Clamp (PlayerPos.x, -3.4f, 3.4f);
		} else if (AR219 == true) {
			Mathf.Clamp (PlayerPos.x, -4.9f, 4.9f);
		} else if (AR43 == true) {
			Mathf.Clamp (PlayerPos.x, -2.85f, 2.85f);
		} else if (AR54 == true) {
			Mathf.Clamp (PlayerPos.x, -2.65f, 2.65f);
		} else if (AR32 == true) {
			Mathf.Clamp (PlayerPos.x, -3.17f, 3.17f);
		}

		gameObject.transform.position = PlayerPos;

Tried using the above in both Start() and Update() to no effect. The sphere doesn’t stop at the designated coordinates.

2

That’s because you’re not assigning the clamped value returned by Mathf.Clamp anywhere. You want something like this instead:

     float clampedX = PlayerPos.x;

     if (AR169 == true) {
         clampedX  = Mathf.Clamp (PlayerPos.x, -3.75f, 3.75f);
     } else if (AR1610 == true) {
         clampedX  = Mathf.Clamp (PlayerPos.x, -3.4f, 3.4f);
     } else if (AR219 == true) {
         clampedX  = Mathf.Clamp (PlayerPos.x, -4.9f, 4.9f);
     } else if (AR43 == true) {
         clampedX  = Mathf.Clamp (PlayerPos.x, -2.85f, 2.85f);
     } else if (AR54 == true) {
         clampedX  = Mathf.Clamp (PlayerPos.x, -2.65f, 2.65f);
     } else if (AR32 == true) {
         clampedX  = Mathf.Clamp (PlayerPos.x, -3.17f, 3.17f);
     }

     gameObject.transform.position = new Vector3(clampedX, PlayerPos.y, PlayerPos.z);
3

You have to assign the Return value of the Clamp function. Like this:

PlayerPos.x = Mathf.Clamp(PlayerPos.x, -3, 3);