{"id":1116,"date":"2012-04-06T16:46:08","date_gmt":"2012-04-06T08:46:08","guid":{"rendered":"http:\/\/www.vbtutor.net\/index.php\/"},"modified":"2018-06-24T22:57:12","modified_gmt":"2018-06-24T14:57:12","slug":"visual-basic-2010-lesson-25","status":"publish","type":"page","link":"https:\/\/www.vbtutor.net\/index.php\/visual-basic-2010-lesson-25\/","title":{"rendered":"Visual Basic 2010 Lesson 25 &#8211; Drawing Polygon and Pie"},"content":{"rendered":"<h4 align=\"center\"><strong><a href=\"http:\/\/www.vbtutor.net\/index.php\/visual-basic-2010-lesson-24\/\">[Lesson 24]<\/a> <\/strong>&lt;&lt;\u00a0<strong><a href=\"http:\/\/www.vbtutor.net\/index.php\/visual-basic-2010-tutorial\/\">[CONTENTS]<\/a> &gt;&gt;<a href=\"http:\/\/www.vbtutor.net\/index.php\/visual-basic-2010-lesson-26\/\"> [Lesson 26]<\/a><\/strong><\/h4>\n<p>In this lesson, we will learn how to draw polygon and pie<\/p>\n<h3>25.1: Drawing a Polygon using the DrawPolygon method<\/h3>\n<p>Polygon is a closed plane figure bounded by three or more straight sides. In order to draw a polygon on the screen, we need to define the coordinates of all the points (also known as vertices) that joined up to form the polygon.<\/p>\n<p>The syntax to defines the points of a polygon with vertices A1, A2, A3, A4&#8230;&#8230;.An is as follows<\/p>\n<pre style=\"font-size: 110%; width: 80%;\">Dim A1 As New Point(X1,Y1)\r\nDim A2 As New Point(X2,Y2)\r\nDim A3 As New Point(X3,Y3)\r\n.\r\n.\r\n\r\nDim An as New Point(Xn,Yn)\r\n<\/pre>\n<p><script async src=\"\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script><br \/>\n<ins class=\"adsbygoogle\"\n     style=\"display:block; text-align:center;\"\n     data-ad-layout=\"in-article\"\n     data-ad-format=\"fluid\"\n     data-ad-client=\"ca-pub-3033628290023372\"\n     data-ad-slot=\"1723562988\"><\/ins><br \/>\n<script>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script><br \/>\nAfter declaring the points, we need to define a point structure that group all the points together using the following syntax:<\/p>\n<pre style=\"font-size: 110%; width: 80%;\">Dim myPoints As Point() = {A1, A2, A3,....,An}\r\n<\/pre>\n<p>.Finally, create the graphics object and use the DrawPolygon method to draw the polygon using the following syntax:<\/p>\n<pre style=\"font-size: 110%; width: 80%;\">Dim myGraphics As Graphics = Me.CreateGraphics\r\n myGraphics.DrawPolygon(myPen, myPoints)\r\n<\/pre>\n<p>where myPen is the Pen object created using the following syntax:<\/p>\n<pre style=\"font-size: 110%; width: 80%;\">myPen = New Pen(Drawing.Color.Blue, 5)\r\n<\/pre>\n<h4>Example 25.1: Drawing a Triangle<\/h4>\n<p>A triangle is a polygon with three vertices. Here is the sample code:<\/p>\n<pre style=\"font-size: 110%; width: 80%;\">Dim myPen As Pen\r\nDim A As New Point(10, 10)\r\nDim B As New Point(100, 50)\r\nDim C As New Point(60, 150)\r\nDim myPoints As Point() = {A, B, C}\r\n myPen = New Pen(Drawing.Color.Blue, 5)\r\nDim myGraphics As Graphics = Me.CreateGraphics\r\n myGraphics.DrawPolygon(myPen, myPoints)\r\n<\/pre>\n<p>Running the program produces the image below:<br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/www.vbtutor.net\/vb2010\/vb2010_Image\/lesson25_1.jpg\" alt=\"Visual Basic 2010\" width=\"300\" height=\"300\" \/><br \/>\n<script async src=\"\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script><br \/>\n<ins class=\"adsbygoogle\"\n     style=\"display:block; text-align:center;\"\n     data-ad-layout=\"in-article\"\n     data-ad-format=\"fluid\"\n     data-ad-client=\"ca-pub-3033628290023372\"\n     data-ad-slot=\"1723562988\"><\/ins><br \/>\n<script>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script><\/p>\n<h4>Example 25.2: Drawing a Quadrilateral<\/h4>\n<p>A quadrilateral is a polygon consist of four sides, \u00a0so you need to define four vertices. The following is the code:<\/p>\n<pre style=\"font-size: 110%; width: 80%;\">Dim myPen As Pen\r\nDim A As New Point(10, 10)\r\nDim B As New Point(100, 50)\r\nDim C As New Point(120, 150)\r\nDim D As New Point(60, 200)\r\nDim myPoints As Point() = {A, B, C, D}\r\n myPen = New Pen(Drawing.Color.Blue, 5)\r\nDim myGraphics As Graphics = Me.CreateGraphics\r\n myGraphics.DrawPolygon(myPen, myPoints)\r\n<\/pre>\n<p>The output image is as shown below:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/www.vbtutor.net\/vb2010\/vb2010_Image\/lesson25_2.jpg\" alt=\"Visual Basic 2010\" width=\"300\" height=\"300\" \/><\/p>\n<h3>25.2: Drawing Pie<\/h3>\n<p>In order to draw a pie, you can use the DrawPie method of the graphics object. As usual, you need to create the Graphics and the Pen objects. The syntax for drawing a pie is:<\/p>\n<pre style=\"font-size: 110%;\">myGraphics.DrawPie(myPen, X, Y, width,height, StartAngle, SweepAngle)\r\n<\/pre>\n<p>Where X and Y are the coordinates the bounding rectangle, other arguments are self-explanatory. Both StartAngle and SweepAngle are measured in degree. SweepAngle can take possible or negative values. If the value is positive, it sweeps through clockwise direction while negative means it sweep through anticlockwise direction.<\/p>\n<p>Example 25.3: Drawing a pie that starts with 0 degree and sweep clockwise through 60 degree.<\/p>\n<pre style=\"font-size: 110%; width: 80%;\">Dim myPen As Pen\r\n myPen = New Pen(Drawing.Color.Blue, 5)\r\nDim myGraphics As Graphics = Me.CreateGraphics\r\n myGraphics.DrawPie(myPen, 50,50, 150,150,0,60)\r\n<\/pre>\n<p>The output image is as shown below:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/www.vbtutor.net\/vb2010\/vb2010_Image\/lesson25_3.jpg\" alt=\"Visual Basic 2010\" width=\"300\" height=\"300\" \/><br \/>\n<script async src=\"\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script><br \/>\n<ins class=\"adsbygoogle\" style=\"display: block;\" data-ad-format=\"autorelaxed\" data-ad-client=\"ca-pub-3033628290023372\" data-ad-slot=\"8075128701\"><\/ins><br \/>\n<script>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script><\/p>\n<h4 align=\"center\"><strong><strong><a href=\"http:\/\/www.vbtutor.net\/index.php\/visual-basic-2010-lesson-24\/\">[Lesson 24]<\/a> <\/strong>&lt;&lt;\u00a0<strong><a href=\"http:\/\/www.vbtutor.net\/index.php\/visual-basic-2010-tutorial\/\">[CONTENTS]<\/a> &gt;&gt;<a href=\"http:\/\/www.vbtutor.net\/index.php\/visual-basic-2010-lesson-26\/\"> [Lesson 26]<\/a><\/strong><\/strong><\/h4>\n","protected":false},"excerpt":{"rendered":"<p>[Lesson 24] &lt;&lt;\u00a0[CONTENTS] &gt;&gt; [Lesson 26] In this lesson, we will learn how to draw polygon and pie 25.1: Drawing a Polygon using the DrawPolygon method Polygon is a closed plane figure bounded by three or more straight sides. In order to draw a polygon on the screen, we need to define the coordinates of &hellip; <a href=\"https:\/\/www.vbtutor.net\/index.php\/visual-basic-2010-lesson-25\/\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">Visual Basic 2010 Lesson 25 &#8211; Drawing Polygon and Pie<\/span><\/a><\/p>\n","protected":false},"author":23013,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-1116","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Visual Basic 2010 Lesson 25 - Drawing Polygon and Pie - Learn Visual Basic Programming \u2013 VB.NET, VBA &amp; Classic VB<\/title>\n<meta name=\"description\" content=\"In this Visual Basic 2010 lesson, you will learn how to use the drawpolygon and drawpie methods in Visual Basic 2010\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"http:\/\/www.vbtutor.net\/vb2010\/vb2010_lesson25.html\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Visual Basic 2010 Lesson 25 - Drawing Polygon and Pie - Learn Visual Basic Programming \u2013 VB.NET, VBA &amp; Classic VB\" \/>\n<meta property=\"og:description\" content=\"In this Visual Basic 2010 lesson, you will learn how to use the drawpolygon and drawpie methods in Visual Basic 2010\" \/>\n<meta property=\"og:url\" content=\"http:\/\/www.vbtutor.net\/vb2010\/vb2010_lesson25.html\" \/>\n<meta property=\"og:site_name\" content=\"Learn Visual Basic Programming \u2013 VB.NET, VBA &amp; Classic VB\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/Vbtutor\" \/>\n<meta property=\"article:modified_time\" content=\"2018-06-24T14:57:12+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.vbtutor.net\/vb2010\/vb2010_Image\/lesson25_1.jpg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:site\" content=\"@liewvk\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.vbtutor.net\/index.php\/visual-basic-2010-lesson-25\/\",\"url\":\"http:\/\/www.vbtutor.net\/vb2010\/vb2010_lesson25.html\",\"name\":\"Visual Basic 2010 Lesson 25 - Drawing Polygon and Pie - Learn Visual Basic Programming \u2013 VB.NET, VBA &amp; Classic VB\",\"isPartOf\":{\"@id\":\"https:\/\/www.vbtutor.net\/#website\"},\"primaryImageOfPage\":{\"@id\":\"http:\/\/www.vbtutor.net\/vb2010\/vb2010_lesson25.html#primaryimage\"},\"image\":{\"@id\":\"http:\/\/www.vbtutor.net\/vb2010\/vb2010_lesson25.html#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.vbtutor.net\/vb2010\/vb2010_Image\/lesson25_1.jpg\",\"datePublished\":\"2012-04-06T08:46:08+00:00\",\"dateModified\":\"2018-06-24T14:57:12+00:00\",\"description\":\"In this Visual Basic 2010 lesson, you will learn how to use the drawpolygon and drawpie methods in Visual Basic 2010\",\"breadcrumb\":{\"@id\":\"http:\/\/www.vbtutor.net\/vb2010\/vb2010_lesson25.html#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"http:\/\/www.vbtutor.net\/vb2010\/vb2010_lesson25.html\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"http:\/\/www.vbtutor.net\/vb2010\/vb2010_lesson25.html#primaryimage\",\"url\":\"https:\/\/www.vbtutor.net\/vb2010\/vb2010_Image\/lesson25_1.jpg\",\"contentUrl\":\"https:\/\/www.vbtutor.net\/vb2010\/vb2010_Image\/lesson25_1.jpg\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"http:\/\/www.vbtutor.net\/vb2010\/vb2010_lesson25.html#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.vbtutor.net\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Visual Basic 2010 Lesson 25 &#8211; Drawing Polygon and Pie\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.vbtutor.net\/#website\",\"url\":\"https:\/\/www.vbtutor.net\/\",\"name\":\"Learn Visual Basic Programming \u2013 VB.NET, VBA &amp; Classic VB\",\"description\":\"Start learning Visual Basic from beginner to advanced. 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