Constraining Position - Done!

Assets/Materials.meta

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Assets/Script/Graph.cs

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-using UnityEngine;
-
-public class Graph : MonoBehaviour
-{
-    [SerializeField]
-    Transform pointPrefab = default;
-
-    [SerializeField, Range(10, 100)]
-    int resolution = 10;
-
-    Transform[] points;
-
-    private void Awake()
-    {
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-        var position = Vector3.zero;
-        var scale = Vector3.one * step;
-        points = new Transform[resolution];
-        for (int i = 0; i < points.Length; i++)
-        {
-            Transform point = Instantiate(pointPrefab);
-            position.x = (i + 0.5f) * step - 1.0f;
-            point.localPosition = position;
-            point.localScale = scale;
-            point.SetParent(transform, false);
-            points[i] = point;
-        }
-    }
-
-    private void Update()
-    {
-        var time = Time.time;
-        for (int i = 0; i < points.Length; i++)
-        {
-            Transform point = points[i];
-            Vector3 position = point.localPosition;
-            position.y = Mathf.Sin(Mathf.PI * (position.x + time));
-            point.localPosition = position;
-        }
-    }
-}

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Assets/Scripts/MovingSphere.cs

@@ -0,0 +1,58 @@
+using UnityEngine;
+
+public class MovingSphere : MonoBehaviour
+{
+    [SerializeField, Range(0f, 100f)]
+    private float maxSpeed = 10f;
+
+    [SerializeField, Range(0f, 100f)]
+    private float maxAcceleration = 10f;
+
+    [SerializeField, Range(0f, 1f)]
+    private float bounciness = 0.5f;
+
+    [SerializeField]
+    private Rect allowedArea = new Rect(-5f, -5f, 10f, 10f);
+
+    private Vector3 velocity;
+
+    private void Update()
+    {
+        Vector2 playerInput;
+        playerInput.x = Input.GetAxis("Horizontal");
+        playerInput.y = Input.GetAxis("Vertical");
+        playerInput = Vector2.ClampMagnitude(playerInput, 1f);
+        var desiredVelocity = new Vector3(playerInput.x, 0f, playerInput.y) * maxSpeed;
+        float maxSpeedChange = maxAcceleration * Time.deltaTime;
+        velocity.x = Mathf.MoveTowards(velocity.x, desiredVelocity.x, maxSpeedChange);
+        velocity.z = Mathf.MoveTowards(velocity.z, desiredVelocity.z, maxSpeedChange);
+        var displacement = velocity * Time.deltaTime;
+        var newPosition = transform.localPosition + displacement;
+        if (newPosition.x < allowedArea.xMin)
+        {
+            newPosition.x = allowedArea.xMin;
+            velocity.x = -velocity.x * bounciness;
+        }
+        else if (newPosition.x > allowedArea.xMax)
+        {
+            newPosition.x = allowedArea.xMax;
+            velocity.x = -velocity.x * bounciness;
+        }
+        if (newPosition.z < allowedArea.yMin)
+        {
+            newPosition.z = allowedArea.yMin;
+            velocity.z = -velocity.z * bounciness;
+        }
+        else if (newPosition.z > allowedArea.yMax)
+        {
+            newPosition.z = allowedArea.yMax;
+            velocity.z = -velocity.z * bounciness;
+        }
+        if (!allowedArea.Contains(new Vector2(newPosition.x, newPosition.z)))
+        {
+            newPosition.x = Mathf.Clamp(newPosition.x, allowedArea.xMin, allowedArea.xMax);
+            newPosition.z = Mathf.Clamp(newPosition.z, allowedArea.yMin, allowedArea.yMax);
+        }
+        transform.localPosition = newPosition;
+    }
+}

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Assets/URP/URP.asset

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@@ -40,7 +40,7 @@ MonoBehaviour:
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ProjectSettings/GraphicsSettings.asset

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ProjectSettings/ProjectSettings.asset

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+  productGUID: 17204c54151362a45a7bbdb4e293141c
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-  productName: Tutorials-Basics-BuildingAGraph
+  productName: Tutorials-Movement-SlidingASphere
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