correct cube to sphere, remove extraneous offset arg

procedural-placement/Assets/PointRendering.cs

@@ -0,0 +1,63 @@
+using System;
+using System.Collections.Generic;
+using System.Net;
+using UnityEditor;
+using UnityEngine;
+using UnityEngine.Serialization;
+
+public enum SamplingTypes {
+    Random,
+    Poisson
+};
+
+public class PointRendering : MonoBehaviour {
+    [Tooltip("The sampling method used to generate points")]
+    public SamplingTypes samplingMethod = SamplingTypes.Random;
+    [Tooltip("The number of points (spheres) placed inside the region")]
+    public int numPoints = 100;
+    [Tooltip("The size of the rendered spheres")]
+    public float sphereSize = 1;
+    [Tooltip("The Size of the region points are generated in")]
+    public Vector2 regionSize = Vector2.one;
+
+    // Store the previous value, only useful for the inspector
+    private SamplingTypes _samplingMethod;
+    private int _prevNumPoints;
+    private Vector2 _prevRegionSize;
+
+    private List<Vector2> _points;
+    
+    private void OnValidate() {
+        // Check to see if point position related values changed. CubeSize is rendering only, so we ignore it.
+        if (numPoints != _prevNumPoints || _prevRegionSize != regionSize
+            || samplingMethod != _samplingMethod) {
+            // Update the tracking values
+            _prevNumPoints = numPoints;
+            _prevRegionSize = regionSize;
+            _samplingMethod = samplingMethod;
+
+            switch (samplingMethod) {
+                case SamplingTypes.Random:
+                    _points = PointGeneration.random_sampling(numPoints, regionSize);
+                    break;
+                case SamplingTypes.Poisson:
+                    _points = new List<Vector2>();
+                    break;
+                default:
+                    throw new ArgumentOutOfRangeException();
+            }
+        }
+    }
+
+    private void OnDrawGizmos() {
+        // Draw a wireframe around the entire region
+        Gizmos.DrawWireCube(this.transform.position,
+            new Vector3(regionSize.x * 2 + sphereSize, regionSize.y * 2 + sphereSize, sphereSize));
+
+        // Render spheres at every point
+        if (_points == null) return;
+        var pos = transform.position;
+        foreach (var point in _points)
+            Gizmos.DrawSphere(new Vector3(point.x + pos.x, point.y + pos.y, pos.z), sphereSize);
+    }
+}