MyGame.Terrain.createVertices C# (CSharp) Method

        private void createVertices()
        {
            vertices = new VertexPositionNormalTexture[nVertices];

            // Calculate the position offset that will center the terrain at (0, 0, 0)
            Vector3 offsetToCenter = -new Vector3(((float)width / 2.0f) * cellSize,
               0, ((float)length / 2.0f) * cellSize);

            //Vector3 offsetToCenter = new Vector3((width-3) * pos.X * cellSize,
            //    0, (length-3) *pos.Y * cellSize);

            // For each pixel in the image
            for (int z = 0; z < length; z++)
                for (int x = 0; x < width; x++)
                {
                    // Find position based on grid coordinates and height in heightmap
                    Vector3 position = new Vector3(x * cellSize, heights[x, z],
                        z * cellSize) + offsetToCenter;

                    // UV coordinates range from (0, 0) at grid location (0, 0) to (1, 1) at grid location (width, length)
                    Vector2 uv = new Vector2((float)x / width, (float)z / length);

                    // Create the vertex
                    vertices[z * width + x] = new VertexPositionNormalTexture(position,
                        Vector3.Zero, uv);
                }
        }