Add CT3536 Games Programming

third/semester1/CT3536: Games Programming/labs/Weeks 1-3/My project (1)/Assets/GameManagerScript.cs

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+// Andrew Hayes, ID: 21321503
+// some of the comments here are quite obvious, and are just here for my own learning purposes
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class GameManager : MonoBehaviour {
+    // inspector settings
+    public GameObject mars;
+    public GameObject phobos; 
+    public GameObject deimos;
+    public GameObject asteroid;
+
+    // speed that the camera moves around mars on arrow keypress
+    public float cameraSpeed = 500;
+
+    // Start is called before the first frame update
+    void Start() {
+        // set position of mars object and point camera at it
+        mars.transform.position = new Vector3(0,0,0);
+        mars.transform.rotation = Quaternion.Euler(new Vector3(270,0,0)); // make it so mars' north pole points up
+        Camera.main.transform.position = new Vector3(0,0,-100);
+        Camera.main.transform.LookAt(mars.transform);
+
+        // before this can run, you need to manually add a rigid body with 0 angular velocity and no gravity in the UI
+        // start mars rotating 
+        mars.GetComponent<Rigidbody>().AddTorque(new Vector3(0,20,0));
+    }
+
+    void Update() {
+        // rotate phobos and deimos a little each frame 
+        phobos.transform.RotateAround(mars.transform.position, Vector3.up, 32*Time.deltaTime);
+        deimos.transform.RotateAround(mars.transform.position, Vector3.up, 8*Time.deltaTime);
+
+        // control the camera's position using the arrow keys
+        if (Input.GetKey(KeyCode.LeftArrow)) {
+            Camera.main.transform.RotateAround(Vector3.zero, Vector3.up, cameraSpeed * Time.deltaTime);
+        }
+        else if (Input.GetKey(KeyCode.RightArrow)) { 
+            Camera.main.transform.RotateAround(Vector3.zero, Vector3.up, -cameraSpeed * Time.deltaTime);
+        }
+        else if (Input.GetKey(KeyCode.UpArrow)) {
+            Camera.main.transform.RotateAround(Vector3.zero, Vector3.right, cameraSpeed * Time.deltaTime);
+        }
+        else if (Input.GetKey(KeyCode.DownArrow)) {
+            Camera.main.transform.RotateAround(Vector3.zero, Vector3.right, -cameraSpeed * Time.deltaTime);
+        }
+
+        // randomly spawn new asteroids
+        if (Random.Range(1,180) == 1) { // assuming Update() is called 60 times per second, want to spawn a new asteroid on average once every 3 seconds
+            Instantiate(asteroid);     // instantiating asteroid prefab
+        }
+    }
+}
+