A panel to change 3d object properties when right click on it - unity3d

Question

I'm building a UI system to edit selected 3D objects. I have spheres on the screen and I want to be able to edit their proprieties (radius for example). In order to do that I want the user to be able to click on a sphere and then it show a panel next to the object. When the user changes slider value the radius of the sphere which as been clicked on change. Using the new unity event system, I think it's easy to achieve, but I'm a new to unity and even if I know the basic I don't know how to organize this properly.
At the end my goal would be to select multiple sphere, right click and edit the radius to all selected spheres.!
Any tips on how to do that ? Sorry for my poor english. Thanks

Answer 1

Here's how you can do it:
Keep a bool for tracking if the object is selected, say, bool _isSelected
Toggle this boolean in the OnMouseUpAsButton() function. This function is called when you click on an object and release that click on the same object. Unity's OnMouseXXX() interfaces are very good for handling mouse events. You just need to define this function in the sphere objects' script.
Put together a Slider and arrange its value interval from editor. Define a function that will edit the scale value of the spheres and tie that function to that slider.
Below you can see an example of how I did that in a game of mine.
Unity simply catches the slider's value if you provide it with a public void _f(float val). It will appear on the top of the list as "Dynamic float". So, in your case, your slider update function should look like this:
public void SphereScaleSliderUpdate(float val)
{
foreach (GameObject sphere in GameObject.FindGameObjectsWithTag("your tag here"))
{
if (sphere.IsSelected) // don't forget to provide a public getter for _isSphere variable
{
sphere.transform.localScale = new Vector3(val, val, val);
}
}
}
Also, you need to create another script for toggling the menu(Canvas/Panel(optional)) that contains the slider, and you may add it to another object, like a UIManager. Assign the Canvas in the game hierarchy to a variable in that script, and then scan for RClick in the Update() function of the UIManager.
.
void Update()
{
if (Input.GetMouseButtonDown(1) // RClick event
{
// makes the slider appear through enabling canvas
_canvasHandle.enabled = true;
}
}