gistfile1.cs

        public void AddGrid()
        {
            this.Picture = new Bitmap(this.pictureBox2.Image);

            double scaleX = 1.0;
            double scaleY = 1.0;

            if (this.OrginalSizeX > this.OrginalSizeY)
            {
                scaleY = this.OrginalSizeY / this.OrginalSizeX;
            }
            else if (this.OrginalSizeX < this.OrginalSizeY)
            {
                scaleX = this.OrginalSizeX / this.OrginalSizeY;
            }

            float pixelWidth = (float)(scaleX * MaxHeightAndWidth);
            float pixelHeight = (float)(scaleY * MaxHeightAndWidth);

            if (this.view.mesh == null)
                return;

            int numberOfElementsX = this.view.mesh[0].Length;
            int numberOfElementsY = this.view.mesh.Length;

            float divX = pixelWidth / (numberOfElementsX - 1);
            float divY = pixelHeight / (numberOfElementsY - 1);

            Bitmap bmp = new Bitmap(this.pictureBox2.Image);
            Graphics gr = Graphics.FromImage(bmp);
            Pen pen = Pens.White;


            for (int i = 0; i < numberOfElementsY - 1; i++)
            {
                float localDivY0 = (float)Bottom - (i * divY);
                float localDivY1 = (float)Bottom - ((i + 1) * divY);
                for (int j = 0; j < numberOfElementsX - 1; j++)
                {
                    float localDivX0 = (float)Left + (j * divX);
                    float localDivX1 = (float)Left + ((j +1 ) * divX);

                    gr.DrawLine(pen, localDivX0, localDivY0, localDivX1, localDivY0);
                    gr.DrawLine(pen, localDivX0, localDivY0, localDivX0, localDivY1);
                    gr.DrawLine(pen, localDivX0, localDivY1, localDivX1, localDivY1);
                    gr.DrawLine(pen, localDivX1, localDivY1, localDivX1, localDivY0);
                    gr.DrawLine(pen, localDivX0, localDivY1, localDivX1, localDivY0);
                }
            }
           
            gr.Save();

            this.pictureBox2.Image = bmp;
            this.pictureBox2.Refresh();
        }