void Start()
{
// Load marker prefabs
GameObject yellowSpherePrefab = Resources.Load <GameObject>("YellowSphere");
GameObject redSpherePrefab = Resources.Load <GameObject>("RedSphere");
// Get a reference to Grids 2D System's API
grid = Grid2D.instance;
// Iterate each cell and draws a sphere on the center of the cell as well as on the vertices
for (int k = 0; k < grid.cells.Count; k++)
{
// Add a yellow circle on the center of the cell
Vector3 worldSpaceCenter = grid.CellGetPosition(k);
GameObject yellowSphere = Instantiate(yellowSpherePrefab);
yellowSphere.transform.position = worldSpaceCenter + Vector3.up * 0.1f;
// For each vertex of the cell, add a red circle
int vertexCount = grid.CellGetVertexCount(k);
for (int p = 0; p < vertexCount; p++)
{
Vector3 worldSpacePosition = grid.CellGetVertexPosition(k, p);
GameObject redSphere = Instantiate(redSpherePrefab);
redSphere.transform.position = worldSpacePosition + Vector3.up * 0.1f; // note: "up" is -z (grid is x,y) - displaced to avoid z-fighting
}
}
}