koobas.hobune.stream
how to compare materials or colors?,How to compare materials or colors?
Hi!
I started to learn Unity about a month ago and I already made a simple ball game in which the ball(player) rolls forward and goes trough different color "force fields". I managed to create a button and attach a script to the player so when the button is pressed the player changes color, but I don't know how to compare the players color to the "force field's" color so when their color matches the player can pass but when it doesn't, it leads to a game over. I am guessing it's not even the color I should compare but the materials in the Mesh Renderer or object tags, but I don't know how to do it. I was trying to watch YouTube tutorials and read forums but I couldn't make it work. I am stuck here for a week now. Help please.
Personally, I would never compare materials nor colors directly. What if your objects become more complex later? What if there are more materials per object?
In my opinion, you are better off assigning a simple value to each object, like an integer, an enum or even a string.
There are many solutions to this problem. I will show you one that uses a separate component (CustomColorComponent) which is added to the player and all the forcefields. The component has a CustomColor enum (Red, Green, Blue, ...).
When the player collides with another object, call the Player script's method, OnCollisionWithOtherGameObject() and pass the other game object as an argument.
The method looks for a CustomColorComponent on the player and on the other gameobject. If both are present, it compares the two enums.
Note: Simply choosing a different color from the enum dropdown in the Insepector will not automatically change the actual color of the object. This can be implemented through code, though, if you're interested.
The DevTest is used to easily test the system by pressing the keys 1 or 2 to "collide" with one of the force fields. The DevTest script and object can be deleted safely.
The DevTest script:
public class DevTest : MonoBehaviour
{
public GameObject playerGameObject;
public GameObject forceField1GameObject;
public GameObject forceField2GameObject;
protected void Update ()
{
if (Input.GetKeyDown (KeyCode.Alpha1))
{
DevHandleCollision (forceField1GameObject);
}
if (Input.GetKeyDown (KeyCode.Alpha2))
{
DevHandleCollision (forceField2GameObject);
}
}
protected void DevHandleCollision (GameObject otherGameObject)
{
Player player = playerGameObject.GetComponent <Player> ();
if (player != null)
{
player.OnCollisionWithOtherGameObject (otherGameObject);
}
}
}
The Player script:
public class Player : MonoBehaviour
{
public void OnCollisionWithOtherGameObject (GameObject otherGameObject)
{
CustomColorComponent playerCustomColorComponent = this.GetComponent <CustomColorComponent> ();
CustomColorComponent otherCustomColorComponent = otherGameObject.GetComponent <CustomColorComponent> ();
if (playerCustomColorComponent == null)
{
Debug.Log ("The player does not have a CustomColorComponent");
}
else
if (otherCustomColorComponent == null)
{
Debug.Log ("The other object does not have a CustomColorComponent");
}
else
if (playerCustomColorComponent.customColor == otherCustomColorComponent.customColor)
{
Debug.Log ("The player collided with an object of the same color");
}
else
{
Debug.Log ("The player collided with an object of a different color");
}
}
}
The CustomColorComponent script and CustomColorEnum:
public enum CustomColorEnum { Red, Green, Blue }
public class CustomColorComponent : MonoBehaviour
{
public CustomColorEnum customColor;
}
Thank You! But I am getting Compiler errors. The same happened with other solutions I tried as well. Perhaps I have to use a specific namespace??
Did you create a script called CustomColorComponent.cs and put the code in it? It's not a component that comes with Unity.
And please remember that the class name and the file name have to be the same.
Hmm! I see what is the problem now. I just wrote the code inside an existing player script ins$$anonymous$$d of creating a new one called CustomColorComponent. Thank you for your help!
