clean select cell shader prop, change checks for editor, enum shader update funcs, code cleanup

Climb/Assets/Editor/GridControllerEditor.cs

@@ -1,15 +1,26 @@
 using UnityEditor;
-using UnityEngine;
 
-
-[CustomEditor(typeof(GridController))]
-public class GridControllerEditor : UnityEditor.Editor {
+namespace Editor {
+    [CustomEditor(typeof(GridController))]
+    public class GridControllerEditor : UnityEditor.Editor {
         public override void OnInspectorGUI() {
             var controller = (GridController) target;
 
+            EditorGUI.BeginChangeCheck();
             controller.size = EditorGUILayout.IntSlider("Size", controller.size, 1, 2048);
+            if (EditorGUI.EndChangeCheck()) {
+                controller.UpdateShader(PropertyName.GridSize);
+                controller.RegenerateValues();
+                controller.UpdateShader(PropertyName.Values);
+                controller.UpdateShader(PropertyName.ValueLength);
+            }
+            
+            EditorGUI.BeginChangeCheck();
             controller.perlinScale = EditorGUILayout.Slider("Perlin Scale", controller.perlinScale, 0.001f, 0.5f);
             controller.offsetChange.x = EditorGUILayout.IntSlider("Horizontal Speed", (int) controller.offsetChange.x, 0, 250);
             controller.offsetChange.y = EditorGUILayout.IntSlider("Horizontal Speed", (int) controller.offsetChange.y, 0, 250);
+            if(EditorGUI.EndChangeCheck())
+                controller.UpdateShader(PropertyName.Values);
+        }
     }
 }

Climb/Assets/GridShader.shader

@@ -3,14 +3,11 @@
 Shader "PDT Shaders/TestGrid" {
 	Properties {
 		_LineColor ("Line Color", Color) = (1,1,1,1)
-		_InactiveColor ("Cell Color", Color) = (0,0,0,0)
-		_ActiveColor ("Selected Color", Color) = (1,0,0,1)
+		_InactiveColor ("Inactive Color", Color) = (0,0,0,0)
+		_ActiveColor ("Active Color", Color) = (1,0,0,1)
 		[PerRendererData] _MainTex ("Albedo (RGB)", 2D) = "white" {}
 		[IntRange] _GridSize("Grid Size", Range(1,100)) = 10
 		_LineSize("Line Size", Range(0,1)) = 0.15
-		[IntRange] _SelectCell("Select Cell Toggle ( 0 = False , 1 = True )", Range(0,1)) = 0.0
-		[IntRange] _SelectedCellX("Selected Cell X", Range(0,100)) = 0.0
-		[IntRange] _SelectedCellY("Selected Cell Y", Range(0,100)) = 0.0
 	}
 	SubShader {
 		Tags { "Queue"="AlphaTest" "RenderType"="TransparentCutout" }
@@ -20,7 +17,6 @@ Shader "PDT Shaders/TestGrid" {
 		CGPROGRAM
 		// Physically based Standard lighting model, and enable shadows on all light types
 		#pragma surface surf Standard fullforwardshadows
-		// Use shader model 3.0 target, to get nicer looking lighting
 		#pragma target 5.0
 
 		sampler2D _MainTex;
@@ -31,6 +27,7 @@ Shader "PDT Shaders/TestGrid" {
 
 		half _Glossiness = 0.0;
 		half _Metallic = 0.0;
+		
 		float4 _LineColor;
 		float4 _InactiveColor;
 		float4 _ActiveColor;
@@ -38,10 +35,7 @@ Shader "PDT Shaders/TestGrid" {
 		float _GridSize;
 		float _LineSize;
 
-		float _SelectCell;
-		float _SelectedCellX;
-		float _SelectedCellY;
-		
+        // DX11 needed to run shader at high grid sizes
 		#ifdef SHADER_API_D3D11
 		StructuredBuffer<float> _values;
 		#else
@@ -61,8 +55,6 @@ Shader "PDT Shaders/TestGrid" {
 			// Albedo comes from a texture tinted by color
 
 			float2 uv = IN.uv_MainTex;
-			_SelectedCellX = floor(_SelectedCellX);
-			_SelectedCellY = floor(_SelectedCellY);
 
 			fixed4 c = float4(0.0,0.0,0.0,0.0);
 			float gsize = floor(_GridSize);

Climb/Assets/Scripts/GridController.cs

@@ -1,50 +1,83 @@
-using UnityEngine;
+using System;
+using UnityEngine;
+
+public enum PropertyName {
+    GridSize,
+    ValueLength,
+    Values
+}
 
 /// <summary>
 /// A simple Grid Rendering Controller using MeshRenderer.
 /// </summary>
 public class GridController : MonoBehaviour {
+    public Material gridMaterial;
     public int size = 32;
     public float perlinScale = 16;
     public Vector2 offsetChange = new Vector2(1, 0);
-    private Vector2 offset;
     
-    public Material gridMaterial;
+    private Vector2 _offset;
     private float[] _values;
-    private ComputeBuffer buffer;
+    private ComputeBuffer _buffer;
     
+    // Get all property IDs
+    private static readonly int ValueLength = Shader.PropertyToID("_valueLength");
+    private static readonly int Values = Shader.PropertyToID("_values");
+    private static readonly int GridSize = Shader.PropertyToID("_GridSize");
 
-    private void regenerateValues() {
+    public void RegenerateValues() {
         _values = new float[size * size];
         for (int x = 0; x < size; x++) {
             for (int y = 0; y < size; y++) {
-                SetValue(x, y, Mathf.PerlinNoise((x + offset.x) * perlinScale, (y + offset.y) * perlinScale));
+                SetValue(x, y, Mathf.PerlinNoise((x + _offset.x) * perlinScale, (y + _offset.y) * perlinScale));
             }
         }
     }
 
     private void Start() {
-        offset = new Vector2(0, 0);
-        buffer = new ComputeBuffer((int) Mathf.Pow(2048, 2), 4);
-        regenerateValues();
-        UpdateShader();
+        _offset = new Vector2(0, 0);
+        _buffer = new ComputeBuffer((int) Mathf.Pow(2048, 2), 4);
+        RegenerateValues();
+        
+        // Update all Shader properties
+        foreach(PropertyName property in Enum.GetValues(typeof(PropertyName)))
+            UpdateShader(property);
     }
 
-    private void UpdateShader() {
-        gridMaterial.SetFloat("_GridSize", size);
-        gridMaterial.SetFloat("_valueLength", _values.Length);
-        buffer.SetData(_values);
-        gridMaterial.SetBuffer("_values", buffer);
+    /// <summary>
+    /// Updates Shader material properties.
+    /// </summary>
+    /// <param name="property">PropertyName item representing Shader property to be updated</param>
+    /// <exception cref="ArgumentOutOfRangeException"></exception>
+    public void UpdateShader(PropertyName property) {
+        switch (property) {
+            case PropertyName.GridSize:
+                gridMaterial.SetFloat(GridSize, size);
+                break;
+            case PropertyName.Values:
+                _buffer.SetData(_values);
+                gridMaterial.SetBuffer(Values, _buffer);
+                break;
+            case PropertyName.ValueLength:
+                gridMaterial.SetFloat(ValueLength, _values.Length);
+                break;
+            default:
+                throw new ArgumentOutOfRangeException(nameof(property), property, null);
+        }
     }
 
     private void Update() {
-        regenerateValues();
-        UpdateShader();
-        offset += offsetChange * Time.deltaTime;
+        // Regenerate new position then send values to Shader
+        RegenerateValues();
+        UpdateShader(PropertyName.Values);
+        
+        // Move offset
+        _offset += offsetChange * Time.deltaTime;
     }
 
     private void OnApplicationQuit() {
-        buffer.Release();
+        // Release ComputeBuffer memory
+        _buffer.Release();
     }
 
     public void SetValue(int x, int y, float value) {