koobas.hobune.stream
How do I add force to an object based on my Camera's cureent Y rotation (C#)
The question explains it for the most part.
I'm currently storing my camera's Y rotation angle in a float.
What I want to do is to take the float, and add force to a different object, at that angle.
I have a feeling I need to use Quaternions, but I haven't the slightest on where to start with those.
Any help will be appreciated!
Here are two ways to approach this problem. You use the Camera's forward instead of the angle you saved. You would do something like:
var dir = Camera.main.transform.forward;
dir.y = 0.0;
rigidbody.AddForce(dir.normalized * amount);
If you want to use your angle you can do it this way:
var dir = Quaternion.AngleAxis(angle, Vector3.up) * Vector3.forward;
rigidbody.AddForce(dir * amount);
I decided to go with the second one, because I have to use the angle I stored. I tried it and it said "The name dir does not exist in this current context" Do I need to make a Vector3 called dir first? Thanks!
You could make a Vector3 first, or just add 'var' in front. I edited the example code and added 'var'.
Yes! It worked! Thank you so much! I've been trying to get this working for over a week. Thanks again! :)
Here is a link to the script reference for AddForce. That may give you what you need. If not let me know. http://docs.unity3d.com/Documentation/ScriptReference/Rigidbody.AddForce.html
Thanks for the answer, but this doesn't really help. I know how to add force, but I don't know how to add force at a specific angle.
This might help. http://answers.unity3d.com/questions/17012/how-to-get-local-angularvelocity.html
It talks about getting angular velocity but it also talks about AddForceAtPosition which may be what you need. http://docs.unity3d.com/Documentation/ScriptReference/Rigidbody.AddForceAtPosition.html This looks to me as the way to go.
IF you want to stay with using the angle that you know then from what I understand about forces so far is that they are applied in terms of Vector3. So there are functions available to convert angles to transforms. If I understand them correctly you may able to use one of those. http://docs.unity3d.com/Documentation/ScriptReference/Transform-eulerAngles.html
A final thought is to use constantForce. http://docs.unity3d.com/Documentation/ScriptReference/ConstantForce-relativeForce.html
So given the above, I think you could take the angle you know. Convert it to a Vector3 then apply that to the different object via constatForce.RalativeForce.
I'll assu$$anonymous$$g that you do not want to rotate the different object to the known angle but simply apply the force at the angle. Yes?
I know this is all conceptual. Sorry I don't have any code to share. Hope it helps.
Thanks for the help. I was able to get it working :)
