Différences

Ci-dessous, les différences entre deux révisions de la page.

--- brasil:courses:blender_unity:unity:4_moving_objects [2026/08/25 19:28] – [The Earth rotates...] yann
+++ brasil:courses:blender_unity:unity:4_moving_objects [2026/09/17 20:16] (Version actuelle) – [Exercise] yann
@@ Ligne 79: / Ligne 79: @@
 <code csharp>
-using Unity.AppUI.UI;
 using UnityEngine;
@@ Ligne 136: / Ligne 135: @@
 {{ :brasil:courses:blender_unity:unity:unityconsoledebug.png |}}
+Hide and display again : we need to hide the children of the paretn GameObkject which have the script : script is disabled when parent GameObject is disabled.
+<code csharp>
+//using Unity.App.UI;
+using UnityEngine;
+public class earthManager : MonoBehaviour
+{
+    // Start is called once before the first execution of Update after the MonoBehaviour is created
+    void Start()
+    {
+    }
+    // Update is called once per frame
+    void Update()
+    {
+        // if the spacebar is pressed
+        //if (Input.GetKeyDown("space")) old input system
+        if (UnityEngine.InputSystem.Keyboard.current.spaceKey.wasPressedThisFrame)
+        {
+            // log a message to the console
+            Debug.Log("The spacebar was pressed");
+            // `this` represents the script instance
+            // `this.gameObject` provides access to the script's GameObject
+            // `activeSelf` indicates the GameObject's visibility
+            // can't deactivate and reactivate the parent directly -> scripts are disabled when object is inactive
+            // gets all the direct children from the parent through "Transform" property, because every object has a transform property
+            foreach (Transform child in this.transform)
+                {
+                bool isActive = child.gameObject.activeSelf;
+                if (isActive)
+                {
+                    // if the GameObject is active (visible)
+                    Debug.Log("Hiding the 'earth' GameObject");
+                    // set the GameObject to inactive (hide it)
+                    child.gameObject.SetActive(false);
+                }
+                else
+                {
+                    // if the GameObject is inactive (not visible)
+                    Debug.Log("Showing the 'earth' GameObject");
+                    // set the GameObject to active (show it)
+                    child.gameObject.SetActive(true);
+                }
+            }
+        }
+    }
+}
+</code>
 ===== The Earth rotates... =====
@@ Ligne 167: / Ligne 225: @@
 The script exposes a public variable named “LocalRotationSpeed” that allows you to customize the rotation speed and axis.
 Set the Y-axis to 50.
-{{ :brasil:courses:blender_unity:unity:unityearthrotationvalue.png |}}
 {{ :brasil:courses:blender_unity:unity:unityearthrotatescriptannoted.png?1024 |}}
@@ Ligne 177: / Ligne 235: @@
 In the editor, you can see in real time that your script is changing the GameObject’s rotation along the Y-axis.
+{{ :brasil:courses:blender_unity:unity:unityearthrotationvalue.png |}}
 ===== Conclusion =====
@@ Ligne 185: / Ligne 243: @@
 ===== Exercise =====
-  - Add a Milky Way skybox; to do this, use the Asset Store (Milky Way Skybox)
+  - Add a Milky Way skybox; to do this, use the Asset Store (Milky Way Skybox) or the file {{ :brasil:courses:blender_unity:unity:milkywayskybox.unitypackage |}}
   - Make the moon rotate on its axis
   - Make the moon orbit the Earth
@@ Ligne 192: / Ligne 250: @@
 {{:brasil:courses:blender_unity:unity:earthandmoon.png?1024|}}
-{{ :brasil:courses:blender_unity:unity:earthturning.mp4 |}}
+{{ :brasil:courses:blender_unity:unity:earthandmoonrotating.mp4 |}}
+<code csharp | turnAround.cs>
+using UnityEngine;
+public class TurnAround : MonoBehaviour
+{
+    // Drag & drop the player in the inspector
+    // public Transform Target;
+    public GameObject Target;
+    public float RotationSpeed = 1;
+    public float CircleRadius = 1;
+    public float ElevationOffset = 0;
+    private Vector3 positionOffset;
+    private float angle;
+    //private Transform TargetT;
+    // Start is called before the first frame update
+    void Start()
+    {
+        //TargetT = Target.transform;
+    }
+    void Update()
+    {
+        positionOffset.Set(Mathf.Cos(angle) * CircleRadius, ElevationOffset, Mathf.Sin(angle) * CircleRadius);
+        transform.position = Target.transform.position + positionOffset;
+        angle += Time.deltaTime * RotationSpeed;
+    }
+ }
+</code>
+<code csharp | lookAt.cs>
+using UnityEngine;
+public class LookAt : MonoBehaviour
+{
+    public Transform target;
+    // Start is called before the first frame update
+    void Start()
+    {
+    }
+    // Update is called once per frame
+    void Update()
+    {
+        // Rotate the camera every frame so it keeps looking at the target
+        transform.LookAt(target);
+        // Same as above, but setting the worldUp parameter to Vector3.left in this example turns the camera on its side
+        //transform.LookAt(target, Vector3.left);
+    }
+}
+</code>