koobas.hobune.stream
How to GetComponent once for multiple comparisions
I feel like there is a better way to do this. Right now in each if condition I have to get the trigger, the gameobject, and ask for its component. I'm looking for a way to just get the component once, and ask if it equals this or this... It just seems inefficient to have to keep using GetComponent. As a programmer, when I see I have to do something over and over, it's a heads up that something could be better.
Any ideas?
For example:
void OnTriggerEnter2D(Collider2D trigger){
var triggerHit = trigger.gameObject.GetComponent<T>();
if(triggerHit == LedgeTrigger){
...
}
...
}
// Actual Code
void OnTriggerEnter2D(Collider2D trigger){
if(trigger.gameObject.GetComponent<LedgeTrigger>() != null)
HitLedge();
else if(trigger.gameObject.GetComponent<WallTrigger>() != null){
HitWall();
}
else if(trigger.gameObject.GetComponent<Door>() != null){
HitDoor();
}
}
You can achieve something similar if all of your trigger classes are in the same hierarchy.
For example:
abstract public class AbstractTrigger : MonoBehavior { ... }
public class LedgeTrigger : AbstractTrigger { ... }
public class WallTrigger : AbstractTrigger { ... }
Then you can do this in OnTriggerEnter2D:
void OnTriggerEnter2D(Collider2D trigger) {
AbstractTrigger t = trigger.gameObject.GetComponent<AbstractTrigger>();
if (t != null) {
if (t is LedgeTrigger) ...
if (t is WallTrigger) ...
...
}
}
Easy, you cache it yourself:
Create a variable on your class to hold a reference to the component and do the GetComponent once in your start method and use that variable everywhere else in your class.
