Controlling a Handle with Mouse Drag?!

[anon_34195251]

Ive really been pulling my hair out over this one! All i have is a handle which should allow the user to click on then drag up and down, then when released will go back to the default position.

Right now i can click on the handle, then when i move the mouse below this initial point the handle rotates down and vice versa. However how can i have the handle ‘follow’ the mouse position? So that the handle isn’t either ON or OFF, it can be controlled precisely with the mouse?

Thanks for any help

[ar0nax]

make and empty object, and place your handle as a child of that object. make sure ur handle is set to start in the midle of the empty object. then rotate the empty object on the x or z axis. the center of the empty object will act as a pivot for your handle.

(I hope i understood your question)

[ar0nax]

or:

@anon_90840083

There are just going to be times we have a bogus pivot point in a model, and we want it to rotate in a sane manner. It may very well be a bug that unity does not rotate about an objects center, or the bug may be that the pivot point can not be changed once the model is imported. I won’t debate that here, but I will provide a fix.

1)Create a new blank object in your scene, give it a name like “WackoPivotPoint”
2)Put that object just where you want the pivot point to be, for the errent model
3) Now make this new blank object a Child of the errent model
4) whenever you want to rotate the errent model in script, use the “find” function from the errent model’s transform. find the child transform by name. In this case pivot = errentModel.transform.Find("WackoPivotPoint");
5) Next use the RotateAround function to, well, do just that. in this case errentModel.transform.RotateAround(pivot.position, Vector3.up,20)

the following code uses a child transform called “SelectorPivot” to rotate around by 20 degrees

	var pivot : Transform = transform.Find("SelectorPivot");
	this.transform.RotateAround(pivot.position, Vector3.up, -20);

I hope this helps!

P.S. don’t bug me about the spelling. It’s 2:45 am, and I just don’t care.

[anon_34195251]

hey ar0nax thanks for your help but thats not really what i am asking (but it is helpful!).

I need to be able to click on the handle and control it with the mouse (rotate it on one axis when i move the mouse up and down on the screen)

Thanks

[ar0nax]

i’ll try to do something, i’ll post what i managed to do.

[ar0nax]

so here’s the thing i came up with. you make a invisible plane, then u cast a ray from the cam onto that plane (that plane has a collider), you take the impact point and u make the handle lookat that point.

593522–21122–$New Unity Project 2.rar (85.8 KB)

[anon_34195251]

@ar0nax

so here’s the thing i came up with. you make a invisible plane, then u cast a ray from the cam onto that plane (that plane has a collider), you take the impact point and u make the handle lookat that point.

ar0nax thanks! this is very helpful, however how cud i constrain the rotation to only one axis and prevent it from spinning around?

Thanks for your time

[ar0nax]

i made the object a rigidbody and checked the contraints not to rotate on z and y, but it doesn’t work… dunno why.

did a little search and this is what i could find:

void Awake() {
        rigidbody.constraints = RigidbodyConstraints.FreezeRotationX | RigidbodyConstraints.FreezeRotationY;
    }

Edit: the above does not work, but i found a solution, all you have to do is add this line:
hit.point.x = 0; after this oneDebug.DrawLine (ray.origin, hit.point); in the file mouseclick.js i gave u in the attachement.

[anon_34195251]

ar0nax, thanks for your help… i will give this a try.