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Assets/CoolapeFrame/3rd/Hivemind/Editor/GridRenderer.cs

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+using UnityEngine;
+using UnityEditor;
+using System.Collections;
+
+namespace Hivemind {
+
+	public class GridRenderer {
+
+		Texture2D gridTex;
+
+		public static int width { get { return 120; } }
+		public static int height { get { return 120; } }
+		public static Vector2 step { get { return new Vector2(width / 10, height / 10); } }
+		
+		void GenerateGrid() {
+			gridTex = new Texture2D(width, height);
+			gridTex.hideFlags = HideFlags.DontSave;
+			
+			Color bg = new Color(0.365f, 0.365f, 0.365f);
+			Color dark = new Color(0.278f, 0.278f, 0.278f);
+			Color light = new Color(0.329f, 0.329f, 0.329f);
+			Color darkX = new Color(0.216f, 0.216f, 0.216f);
+			Color lightX = new Color(0.298f, 0.298f, 0.298f);
+			
+			for (int x = 0; x < width; x ++) {
+				for (int y = 0; y < height; y ++) {
+					
+					if (x == 0 && y == 0)
+						gridTex.SetPixel(x, y, darkX);
+					else if (x == 0 || y == 0)
+						gridTex.SetPixel(x, y, dark);
+					else if (x % step.x == 0 && y % step.y == 0)
+						gridTex.SetPixel(x, y, lightX);
+					else if (x % step.x == 0 || y % step.y == 0)
+						gridTex.SetPixel(x, y, light);
+					else
+						gridTex.SetPixel(x, y, bg);
+				}
+			}
+			
+			gridTex.Apply();
+		}
+		
+		public void Draw(Vector2 scrollPoint, Rect canvas) {
+			if (!gridTex) GenerateGrid ();
+			
+			float yOffset = scrollPoint.y % gridTex.height;
+			float yStart = scrollPoint.y - yOffset;
+			float yEnd = scrollPoint.y + canvas.height + yOffset;
+			
+			float xOffset = scrollPoint.x % gridTex.width;
+			float xStart = scrollPoint.x - xOffset;
+			float xEnd = scrollPoint.x + canvas.width + xOffset;
+			
+			for (float x = xStart; x < xEnd; x += gridTex.width) {
+				for (float y = yStart; y < yEnd; y += gridTex.height) {
+					GUI.DrawTexture(new Rect(x, y, gridTex.width, gridTex.height), gridTex);
+				}
+			}
+		}
+
+	}
+	
+}