# How to Create Hexagonal Grid using iOS Core Graphics

 Vidur Sachdeva · May 28, 2015 I am new to iOS and I want to know How to create hexagonal grid. I also want to change the color when each hexagon is tapped..

## Replies

 uma singh · October 5, 2015 You can try this code for create hexagonal gridpublic class Hex{ private System.Drawing.PointF[] points; private float side; private float h; private float r; private Hexagonal.HexOrientation orientation; private float x; private float y; ... private void CalculateVertices() { h = Hexagonal.Math.CalculateH(side); r = Hexagonal.Math.CalculateR(side); switch (orientation) { case Hexagonal.HexOrientation.Flat: // x,y coordinates are top left point points = new System.Drawing.PointF[6]; points[0] = new PointF(x, y); points[1] = new PointF(x + side, y); points[2] = new PointF(x + side + h, y + r); points[3] = new PointF(x + side, y + r + r); points[4] = new PointF(x, y + r + r); points[5] = new PointF(x - h, y + r ); break; case Hexagonal.HexOrientation.Pointy: //x,y coordinates are top center point points = new System.Drawing.PointF[6]; points[0] = new PointF(x, y); points[1] = new PointF(x + r, y + h); points[2] = new PointF(x + r, y + side + h); points[3] = new PointF(x, y + side + h + h); points[4] = new PointF(x - r, y + side + h); points[5] = new PointF(x - r, y + h); break; default: throw new Exception("No HexOrientation defined for Hex object."); } }}public enum HexOrientation{ Flat = 0, Pointy = 1,}
• 1

## iOS Development / Swift

123,001 followers