92 lines
3.6 KiB
C#
92 lines
3.6 KiB
C#
using System.Collections;
|
|
using System.Collections.Generic;
|
|
using UnityEngine;
|
|
|
|
public class Asteroid : MonoBehaviour {
|
|
|
|
// inspector settings
|
|
public Rigidbody rigidBody;
|
|
public GameObject miniAsteroid;
|
|
public GameObject smallAsteroid; // spawn small asteroids in the place of the large asteroid
|
|
|
|
// Use this for initialization
|
|
void Start () {
|
|
// randomise size+mass
|
|
transform.localScale = new Vector3(Random.Range(0.06f,0.09f), Random.Range(0.06f,0.09f), Random.Range
|
|
(0.06f,0.09f));
|
|
rigidBody.mass = transform.localScale.x * transform.localScale.y * transform.localScale.z;
|
|
|
|
// randomise velocity
|
|
rigidBody.velocity = new Vector3 (Random.Range (-20f, 20f), 0f, Random.Range (-20f, 20f));
|
|
rigidBody.angularVelocity = new Vector3 (Random.Range (-20f, 20f), Random.Range (-
|
|
20f, 20f), Random.Range (-20f, 20f));
|
|
|
|
// start periodically checking for being off-screen
|
|
InvokeRepeating ("CheckScreenEdges", 0.2f, 0.2f);
|
|
}
|
|
|
|
private void CheckScreenEdges() {
|
|
Vector3 pos = transform.position;
|
|
Vector3 vel = rigidBody.velocity;
|
|
float xTeleport = 0f, zTeleport = 0f;
|
|
|
|
if (pos.x < GameManager.screenBottomLeft.x && vel.x <= 0f) // velocity check as sanity test
|
|
xTeleport = GameManager.screenWidth;
|
|
else if (pos.x > GameManager.screenTopRight.x && vel.x >= 0f)
|
|
xTeleport = -GameManager.screenWidth;
|
|
|
|
if (pos.z < GameManager.screenBottomLeft.z && vel.z <= 0f)
|
|
zTeleport = GameManager.screenHeight;
|
|
else if (pos.z > GameManager.screenTopRight.z && vel.z >= 0f)
|
|
zTeleport = -GameManager.screenHeight;
|
|
|
|
if (xTeleport != 0f || zTeleport != 0f)
|
|
transform.position = new Vector3 (pos.x + xTeleport, 0f, pos.z + zTeleport);
|
|
|
|
}
|
|
|
|
// method to spawn mini-asteroid fragments at the contact point(s) of a collision
|
|
private void OnCollisionEnter(Collision collision) {
|
|
// if collided with the spaceship, destroy it and recreate it at 0,0,0
|
|
if (collision.gameObject.CompareTag("spaceship")) {
|
|
Destroy(collision.gameObject);
|
|
GameManager.CreatePlayerSpaceship();
|
|
}
|
|
|
|
// if collided with the bullet, destroy it and asteroid and spawn small asteroids
|
|
if (collision.gameObject.CompareTag("bullet")) {
|
|
Destroy(collision.gameObject);
|
|
Destroy(this);
|
|
|
|
for (int i = 0; i <= numF4ragments; i++) {
|
|
GameObject fragment = Instantiate(miniAsteroid);
|
|
Instantiate(smallAsteroid, transform.position, transform.rotation);
|
|
}
|
|
}
|
|
|
|
// Arraylist to keep track of the mini asteroids created for a collision
|
|
ArrayList fragments = new ArrayList();
|
|
|
|
foreach (ContactPoint contact in collision.contacts) {
|
|
// instantiating a random number of mini asteroid between 1 and 5 inclusive
|
|
int numFragments = Random.Range(1, 5);
|
|
|
|
for (int i = 1; i <= numFragments; i++) {
|
|
GameObject fragment = Instantiate(miniAsteroid);
|
|
fragment.transform.position = contact.point;
|
|
fragments.Add(fragment);
|
|
}
|
|
}
|
|
|
|
StartCoroutine(DestroyFragments(fragments));
|
|
}
|
|
|
|
// coroutine to destroy all the fragments from a collision
|
|
IEnumerator DestroyFragments(ArrayList fragments) {
|
|
yield return new WaitForSeconds(3);
|
|
|
|
foreach (GameObject fragment in fragments) {
|
|
Destroy(fragment);
|
|
}
|
|
}
|
|
} |