added placementModes and mesh testing

can place varying values into grid, starting to work on rendering meshes to represent the cells

Pathfinding Visualizer/Assets/Scripts/Main.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class Main : MonoBehaviour
+{
+
+    private LogicGrid world;
+    char placementMode;
+    int placementValue;
+
+    // Start is called before the first frame update
+    void Start()
+    {
+        // Create world
+        world = new LogicGrid(5, 5, 10f, new Vector3(-100, -30));
+        
+        // Set default placement to Obstacle
+        placementValue = -1;
+        placementMode = 'o';
+        Debug.Log("Loaded. Placing Mode: Obstacle");
+
+    }
+
+    // Update is called once per frame
+    void Update()
+    {
+        // Change Placement Modes:
+        // Place Agent in grid
+        // TODO change modes via UI button
+        if(Input.GetKeyDown("a"))
+        {
+            Debug.Log("Placing Mode: Agent");
+            placementMode = 'a';
+            placementValue = 2;
+        }
+        // Place Sample in grid
+        if(Input.GetKeyDown("s"))
+        {
+            Debug.Log("Placing Mode: Sample");
+            placementMode = 's';
+            placementValue = 1;
+        }
+        // Place Obstacle in grid
+        if(Input.GetKeyDown("o"))
+        {
+            Debug.Log("Placing Mode: Obstacle");
+            placementMode = 'o';
+            placementValue = -1;
+        }
+
+        
+        // Update Cell:
+        // Change cell to obstacle
+        if (Input.GetMouseButtonDown(0))
+        {
+            world.SetValue(CodeMonkey.Utils.UtilsClass.GetMouseWorldPosition(), placementValue);
+        }
+        // Clear cell
+        if (Input.GetMouseButtonDown(1))
+        {
+            world.SetValue(CodeMonkey.Utils.UtilsClass.GetMouseWorldPosition(), 0);
+        }
+
+        // Make functionality for when "start" button is pressed.
+            // should call some sort of function that will take in the world
+            // and perform the selected algorithm
+
+    }
+}

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Pathfinding Visualizer/Assets/Scripts/MeshTesting.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class MeshTesting : MonoBehaviour
+{
+    void Start()
+    {
+
+        Debug.Log("Mesh Testing");
+
+        Mesh mesh = new Mesh();
+
+
+        // Build required data-structures for triangle mesh
+        Vector3[] vertices = new Vector3[3];
+        Vector2[] uv = new Vector2[3];
+        int[] triangles = new int[3];
+
+        // Set vertices of polygon (triangle)
+        vertices[0] = new Vector3(  0,   0);
+        vertices[1] = new Vector3(  0, 100);
+        vertices[2] = new Vector3(100, 100);
+
+        // Set order of indexes of vertices to draw polygon (v1 -> v2 -> v3 -> v1)
+        // Note: always set clockwise, otherwise mesh will be facing backwards
+        triangles[0] = 0;
+        triangles[1] = 1;
+        triangles[2] = 2;
+
+
+        mesh.vertices = vertices;
+        mesh.uv = uv;
+        mesh.triangles = triangles;
+
+        GetComponent<MeshFilter>().mesh = mesh;
+        
+    }
+}

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