Pickup mechanic
- Game Development course
- Advanced
- Lesson 51/71
- 4 min
Write a pickup script for collectible items.
Pickup Mechanism and Triggers
Collectibles such as coins, potions, or keys must allow the player to pass through rather than stopping movement like a solid wall. For this, Is Trigger is enabled on the Collider component.
// Trigger-enabled colliders report overlaps rather than solid impacts
void OnTriggerEnter(Collider other) {
if (other.CompareTag("Player")) {
// Execute collection logic
}
}This disables rigid physical collision while allowing overlap events to be processed via code.
Collection Event and Destroy
When the player intersects the coin, OnTriggerEnter executes. The player tag is confirmed, score is credited, and the collected item is purged using Destroy(gameObject).
void OnTriggerEnter(Collider other) {
if (other.CompareTag("Player")) {
// Increment score and delete coin from scene
Destroy(gameObject);
}
}Optionally, a particle burst or audio cue is played at the pickup position for player feedback.
Practice Coin pickup notification
Define a Start method. Inside, declare int altinDegeri = 10; and print "Toplanan altin: " + altinDegeri to the console.
Starter code
using UnityEngine;
public class PickupTester : MonoBehaviour
{
// Start icinde altinDegeri tanimla ve yazdir
}Sample solution
using UnityEngine;
public class PickupTester : MonoBehaviour
{
void Start()
{
int altinDegeri = 10;
Debug.Log("Toplanan altin: " + altinDegeri);
}
}Expected output
Toplanan altin: 10
Questions and answers
Review the lesson questions together with their answers. To test yourself, solve the lesson interactively.
1 Which setting must be enabled on a Collider so a collectible coin can be passed through instead of blocking the player?
- Cast Shadows
- Is Kinematic
- Static Mesh
- Is Trigger Correct answer
Explanation: Enabling 'Is Trigger' on a Collider removes physical obstruction, allowing characters to overlap and trigger events.
2 Destroy collected game object
Destroy(____);Destroy(gameObject);Explanation: To remove the entire object hosting the script from the scene, 'Destroy(gameObject)' is called.
3 Pickup mechanism concepts
| Term | Meaning |
|---|---|
Is Trigger |
Enables trigger overlap, no collision |
OnTriggerEnter |
Fires when object enters trigger volume |
CompareTag |
Safely verifies the tag of an object |
Destroy |
Removes the object from scene and memory |