MonoBehaviour.OnMouseEnter()

Description

Called when the mouse enters the GUIElement or Collider.

The corresponding OnMouseOver function is called while the mouse stays over the object and OnMouseExit is called when it moves away.

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour {
    public Renderer rend;
    void Start() {
        rend = GetComponent<Renderer>();
    }
    void OnMouseEnter() {
        rend.material.color = Color.red;
    }
    void OnMouseOver() {
        rend.material.color -= new Color(0.1F, 0, 0) * Time.deltaTime;
    }
    void OnMouseExit() {
        rend.material.color = Color.white;
    }
}

This function is not called on objects that belong to Ignore Raycast layer.

This function is called on Colliders marked as Trigger if and only if Physics.queriesHitTriggers is true.

OnMouseEnter can be a co-routine, simply use the yield statement in the function. This event is sent to all scripts attached to the Collider or GUIElement.

See Also: OnMouseOver, OnMouseExit.