[Solved - sort of] Can't find a way to lock cannon aiming between 2 angle values

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So I have been browsing previous questions but haven't had any luck figuring out my specific problem. I have a cannon that I want the user to be able to vertically aim. I can get the cannon to respond to input but now I need to lock it within what I consider valid points.

The cannon is rotated on the x-axis. 0 is straight up and 90 would be pointing forward. So if I only want the player to be able to adjust the cannon between say 45 degrees and 90 degrees, the valid area would look like this: alt text

Ok. So that behaves as expected (watching the inspector as it rotates confirms this.) However, when I try to query what angle the cannon body is at, I get odd results. I currently am trying to get it by euler angles but I have tried pretty much everything I have been able to find or can think of to check the rotation but I always get a weird result. Here are the results logged when I try and check rotation in the code: (also please ignore the spelling errors in rotation) alt text

Here is the code snippet where I log its angle and do actual manipulation: (cannonBody is a gameObject refrence)

 print("X roatation: " + cannonBody.transform.eulerAngles.x.ToString());
 cannonBody.transform.Rotate(-Input.GetAxis ("Vertical") * 2,0.0f, 0.0f);

So, if I were to say check if the cannon is rotated less than 90 degrees I would get false results back. What is the best way of going about this?

Posting my findings as an answer.

Answer 1

So I was able to get the behavior I expected after watching this video and adapting the code to suit my configuration.

Here is what I ended up doing:

 public float maxAimAngle;
 public float minAimAngle;
 private float currentRotation = 75.0f;

 ***
 Update calls input handler which calls handleArrowInput()
 ***
 
 private void handleArrowInput(){
     if(Input.GetAxis ("Vertical")!=0){
         currentRotation += -Input.GetAxis ("Vertical") * 2;
         currentRotation = Mathf.Clamp(currentRotation, minAimAngle, maxAimAngle);
         cannonBody.transform.eulerAngles = new Vector3(currentRotation,cannonBody.transform.eulerAngles.y, cannonBody.transform.eulerAngles.z);
     }
 }

The cannon is started rotated at 75 degrees on the x-axis. So, I just manipulated the variable, clamped it and then set the new rotation to the result.

If anyone does have an answer as to why when I was querying the eulerAngles it gave me odd results I'd love to here it. Also if you know of a better way of accomplishing this please feel free to let me know.

[Solved - sort of] Can't find a way to lock cannon aiming between 2 angle values

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