Clicking on a game object?

Questions & Answers
1

I want to be able to click on a game object (or a person) and have it open up a dialog window. i have no idea how to do that and i have been searching online for hours and no one asked this question. if you can, could you please help me.

2

If your object has colliders it easy,
just use

bool clicked = false;

void OnMouseUp() 
{
    clicked = true; 
}
void OnGUI() 
{
    if (clicked) 
    {
        GUI.Box(new Rect(20, 50, 100, 40), Box) 
    
    if (GUI.Button(new Rect(10, 50, 50, 20), Close)) 
          clicked = false; 
    
    }
}

Attach this to your object.

Position of GUI elements will probably need changing.

3

Your Gameobject needs to have a collider. Then you can put whatever code you need in the method OnMouseDown() (triggers when a mouse button is clicked down while over the objects collider), or OnMouseUp() (feels more natural when detecting clicks).

more info on the Mouse events:
http://unity3d.com/support/documentation/ScriptReference/MonoBehaviour.html

if you need more control, you can do a raycast:
http://unity3d.com/support/documentation/ScriptReference/30_search.html?q=raycast

The dialog stuff you have to do in the OnGUI() method:
http://unity3d.com/support/documentation/ScriptReference/MonoBehaviour.OnGUI.html

I would go into more detail, but don’t have much time. The scripting reference is always a great resource. Also, search YouTube, there are some great video tutorials there.