csharp
/
XNAGameStudio
mirror of https://github.com/SimonDarksideJ/XNAGameStudio.git


			
							123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667668669670671672673674675676677678679680681682683684685686687688689690691692693694695696697698699700701702703704705706707708709710711712713714715716717718719720721722723724725726727728729730731732733734735736737738739740741742743744745746747748749750751752753754755756757758759760761762763764765766767768769770771772773774775776777778779780781782783784785786787788789790791792793794795796797798799800801802803804805806807808809810811812813814815816817818819820821822823824825826827828829830831832833834835836837838839840841842843844845846847848849850851852853854855856857858859
							<html xmlns:MSHelp="http://msdn.microsoft.com/mshelp" xmlns:msxsl="urn:schemas-microsoft-com:xslt" xmlns:xanx="http://schemas.microsoft.com/developer/xanx/2005"><head><META http-equiv="Content-Type" content="text/html; charset=utf-8"><META NAME="save" CONTENT="history"><title>Primitives Sample</title>
<style><!--
/***********************************************************
 *             SCRIPT-SUPPORTING STYLES
 ***********************************************************/

/* Defines the userData cache persistence mechanism. */
.userDataStyle
{
	behavior: url(#default#userData);
}

/* Used to save the scroll bar position when navigating away from a page. */
div.saveHistory
{
	behavior: url(#default#saveHistory);
}

/* Formats the expand/collapse images for all collapsible regions. */
img.toggle
{
	border: 0;
	margin-right: 5;
}

/* Formats the Language filter drop-down image. */
img#languageFilterImage
{
	border: 0;
	margin-left: 0;
	vertical-align: middle;
}

/* Formats the Members Options filter drop-down image. */
img#membersOptionsFilterImage
{
	border: 0;
	margin-left: 0;
	vertical-align: middle;
}

/* Formats the Collapse All/Expand All images. */
img#toggleAllImage
{
	margin-left: 0;
	vertical-align: middle;
}

/* Supports XLinks */
MSHelp\:link
{
 	text-decoration: underline;
	color: #0000ff; 
	hoverColor: #3366ff;
	filterString: ;
}


body
	{
	background:	#FFFFFF;
	color: #000000;
	font-family:	Verdana;
	font-size: medium;
	font-style: normal;
	font-weight: normal;
	margin-top:	0;
	margin-bottom:	0;
	margin-left:	0;
	margin-right:	0;
	width:	100%;
	/*font-size: 110%;*/
	}

div.section
	{
	margin-left: 15px;
	}

div.hxnx5
	{
	margin-left: 1.5em;
	}

/* Font for all headings */	
h1, h2, h3, h4, h5, h6
	{
	font-family: Verdana, Arial, Helvetica, sans-serif;
	margin-top: 18;
	margin-bottom: 8; 
	font-weight: bold;
	}
h1
	{
	font-size: 130%;
	color: #003399;
	}
div#scrollyes h1 /* Changes font size for full-scrolling topic */
	{
	font-size: 150%;
	}
h2
	{
	font-size: 125%;
	}
h3
	{
	font-size: 115%;
	margin-top: 9;
	margin-bottom: 4; 
	}
h4
	{
	font-size: 115%;
	margin-top: 9;
	margin-bottom: 4; 
	}
h5
	{
	font-size: 100%;
	margin-top: 9;
	margin-bottom: 4; 
	}
h6
	{
	font-size: 100%;
	margin-top: 9;
	margin-bottom: 4; 
	}

ul p, ol p, dl p
	{
	margin-left: 0em;
	}

p
	{
	margin-top: .6em;
	margin-bottom: .6em;
	}
	
td p
	{
	margin-top: 0.0em;
	margin-bottom: 0.6em;
	}

dd p
	{
	margin-top: 0.0em;
	margin-bottom: 0.6em;
	}

.image
	{
	text-align: center;
	}

dl
	{
	margin-top: 0em; 
	margin-bottom: 1.3em;
	}

dd
	{
	margin-bottom: 0em;
	margin-left: 0;
	}

dl.glossary dd 
{
	margin-bottom: 0em;  
	margin-left: 1.5em; 
}

dt
	{
	margin-top: .6em;
	margin-bottom: 1;
	}

ul, ol
	{
	margin-top: 0.6em;
	margin-bottom: 0.6em; 	
	}
	
ol
	{
	margin-left: 2.5em; 
	
	}	
	
ul
	{
	list-style-type: disc; 
	margin-left: 1.9em; 
	}

li
	{
	margin-bottom: 0.4em;
	}

ul ol, ol ol
	{
	list-style-type: lower-alpha;
	}

pre
	{
	margin-top: .6em;
	margin-bottom: .6em; 
	}

pre
	{
	font: 105% Lucida, mono; 
	color: #000066;
	}

code
{
	font-family: Monospace, Courier New, Courier;
	font-size: 105%;
	color:	#000066;
}

table.userdata td 
	{
	background: #ffffff;
	background-color: #F5F5F5;
	border-color: #ffffff;
	border: none;
	}	
table.clsWarning
	{
	background: #ffffff;
	padding: 0px;
	margin: 0px;
	border: none;
	}
table.clsWarning td
	{
	padding: 0px;
	margin: 0px;
	background: #ffffff;
	vertical-align: middle;
	font-size: 70%;
	}

div#mainSection table
	{
	width: 98%;
	background: #ffffff;
	margin-top: 5px;
	margin-bottom: 5px;
	}

div#mainSection table th
	{ 
	padding: 5px 6px;
	background: #EFEFF7;
	text-align: left;
	font-size: 70%;
	vertical-align: bottom;
	border-bottom: 1px solid #C8CDDE;
	}
div#mainSection table td
	{ 
	padding: 5px 5px;
	background: #F7F7FF;
	vertical-align: top;
	font-size: 70%;
	border-bottom: 1px solid #D5D5D3;
	}

div#syntaxCodeBlocks table th
	{
	padding: 1px 6px;
	color: #000066;
	}

div#syntaxCodeBlocks table td
	{
	padding: 1px 5px;
	}

/* Applies to the running header text in the first row of the upper table in the
   non-scrolling header region. */
span#runningHeaderText
{
	color: #003399;
	font-size: 90%;
	padding-left: 13;
}

/* Applies to the topic title in the second row of the upper table in the
   non-scrolling header region. */
span#nsrTitle
{
	color: #003399;
	font-size: 120%;
	font-weight: 600;
	padding-left: 13;
}

/* Applies to everything below the non-scrolling header region. */
div#mainSection
{
	font-size: 70%;
	width: 100%;
}

/* Applies to everything below the non-scrolling header region, minus the footer. */
div#mainBody
{
	font-size: 90%;
	margin-left: 15;
	margin-top: 10;
	padding-bottom: 20;
}

/* Adds right padding for all blocks in mainBody */
div#mainBody p, div#mainBody ol, div#mainBody ul, div#mainBody dl
{
	padding-right: 5;
}

div#mainBody div.alert, div#mainBody div.code, div#mainBody div.tableSection
{
	width:98.9%;
}

div.alert p, div.code p
{
	margin-top:5;
	margin-bottom:8;
}

/*- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Begin Note Styles - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -*/
div#mainSection div.alert table
{
	border: 0;
}

div#mainSection div.alert table th
{
	padding-top: 0;
	padding-bottom: 0;
	padding-left: 5;
	padding-right: 5;
}

div#mainSection div.alert table td
{
	padding-left: 5;
	padding-right: 5;
}

img.note
{
	border: 0;
	margin-left: 0;
	margin-right: 3;
}
/*- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - End Note Styles - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -*/

/*- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Begin Non-scrolling Header Region Styles - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -*/
/* Applies to the entire non-scrolling header region. */
div#header
{
	background-color: #D4DFFF;
	padding-top:	0;
	padding-bottom:	0;
	padding-left:	0;
	padding-right:	0;
	width:	100%;
}

/* Applies to both tables in the non-scrolling header region. */
div#header table
{
	margin-top:	0;
	margin-bottom: 0;
	border-bottom-color: #C8CDDE;
	border-bottom-style: solid;
	border-bottom-width: 1;
	background: #D4DFFF;
	width:	100%;
}

/* Applies to cells in both tables in the non-scrolling header region. */
div#header table td
{
	color: #0000FF;
	font-size: 70%;
	padding-right: 20;
	padding-top: 1;
	padding-bottom: 1;
	border: none;
	background: #D4DFFF;
}

/* Applies to the last row in the upper table of the non-scrolling header region. Text 
   in this row includes See Also, Constructors, Methods, and Properties. */
div#header table tr#headerTableRow3 td
{
	padding-bottom: 2;
	padding-top: 5;
	padding-left: 15;
}

/* Applies to the lower table in the non-scrolling header region. Text in this table
   includes Collapse All/Expand All, Language Filter, and Members Options. */
div#header table#bottomTable
{
	border-top-color: #FFFFFF;
	border-top-style: solid;
	border-top-width: 1;
	text-align: left;
	padding-left: 15;
}


blockquote
	{
	margin-left: 3.8em;
	margin-right: 3.8em;
	margin-top: .6em;
	margin-bottom: .6em;
	}

sup
	{
	text-decoration: none;
	font-size: smaller; 
	}

a:link
	{
	color: #0000FF;
/*    font-weight: bold */
	}
	
a:visited
	{
	color: #0000AA;
/*    font-weight: bold	*/
	}
	
a:hover
	{
	color: #3366FF;
/*    font-weight: bold */
	}
	
.label
	{
	font-weight: bold; 
	margin-top: 1em;
	margin-left: -26px;
	}
	
.tl
	{
	margin-bottom: .75em; 
	}
	
.atl
	{
	padding-left: 1.5em;
	padding-bottom: .75em; 
	}
	
.cfe
	{
	font-weight: bold; 
	}
	
.mini
	{
	font-size: smaller;
	}
	
.dt
	{
	margin-bottom: -.6em; 
	}
	
.indent
	{
	margin-left: 1.9em; 
	margin-right: 1.9em;
	}

.product
	{
	text-align: right;
	color: #333333;
	font-size: smaller;
	font-style: italic;
	}

.buttonbarshade
	{
	position: relative;
	margin: 0;
	left: 0px;
	top: 2;
	width: 50%;
	height: 40px;
	}

.buttonbartable
	{
	position: absolute;
	margin: 0;
	padding:0;
	border:0;
	left:0px;
	top: 2;
	width: 100%;
	height: 40px;
	}

/* background color, font for header */ 
table.buttonbartable td, table.buttonbarshade td
	{
	background: #ffffff; /*#5177B8; #80C615;*/
	border-left: 0px solid #80C615;
	margin: 0;
	padding: 0px 0px 0px 0px;
	font-family: Impact, sans-serif;
	font-size: 14pt;
	}

table.buttonbartable td.button1
	{
	background: #5177B8; /*#80C615;*/;
	padding: 0;
	font-weight: bold;
	text-align: center;
	cursor: hand;
	}

table.buttonbartable td.button2
	{
	background: #5177B8; /*#80C615;*/;
	font-weight: bold;
	text-align: center;
	}

table.buttonbartable td.button3
	{
	background: #5177B8; /*#80C615;*/;
	font-weight: bold;
	text-align: center;
	}

table.buttonbartable td.runninghead
	{
	padding-left: 0px;
	font-style: italic;
	text-align: left;
	}

.version
	{
	text-align: left;
	color: #000000;
	margin-top: 3em;
	margin-left: -26px;
	font-size: smaller;
	font-style: italic;
	}

.lang, .ilang
	{
	color: #0000ff;
	font: normal 7pt Arial, Helvetica, sans-serif;
	}

div.langMenu
	{
	position: absolute;
	z-index: 1;
	width: 96pt;
	padding: 8pt;
	visibility: hidden;
	border: 1px solid #000000;
	background: #ffffd0;
	}

div.langMenu ul
	{
	padding-left: 2em;
	margin-left: 0;
	}

div.filtered
	{
	margin: 4pt 0 8pt -26px;
	padding: 4px 4px 8px 26px;
	width: 100%;
	border: 2px solid #aaaacc;
	background: #ffffff;
	}

div.filtered2
	{
	margin: 4pt 0 8pt -26px;
	padding: 4px 4px 8px 26px;
	width: 100%;
	border: none;
	background: #ffffff;
	}

div.filtered h1, div.filtered h2, div.filtered h3, div.filtered h4
	{
	margin-left: -22px;
	}

div.filtered span.lang
	{
	position: relative;
	left: -22px;
	}

div.reftip
	{
	position: absolute;
	z-index: 1;
	padding: 8pt;
	visibility: hidden;
	border: 1px solid #000000;
	background: #ffffd0;
	}

a.synParam
	{
	color: #0000FF;
	/*color: #3F7800;*/ 	
	/*color: #8DC54F;*/
	text-decoration: none;
    font-weight: normal;
	}

a.synParam:hover
	{
	text-decoration: underline;
    font-weight: normal;
	}

div.sapop
	{
	position: absolute;
	z-index: 1;
	left: 26px;
	width: 100%;
	padding: 10px 10px 10px 36px;
	visibility: hidden;
	border: 1px solid #000000;
	background: #ffffd0;
	}

div.footer
	{
	width: 100%;
	border: none;
	background: #ffffff;
	margin-top: 18pt;
	padding-bottom: 12pt;
	color: #0000FF;
	/*color: #228B22; */
	text-align: center;
	font-size: 76%;
	}

div.preliminary
	{
	margin-top: 8pt;
	padding-bottom: 12pt;
	color: #A0A0A0;
	}

/* A procedure section. eg. 'To create a file', 'To add a value' */
div.proc
    {
	margin-left: 0.5em; 
    }
     
/* The title of a 'procedure' section. */
div.proc h3
    {
	font-family: Verdana, Arial, Helvetica, sans-serif;
	font-weight: bold;
	font-size: 115%;
	margin-top: 1em;
	margin-bottom: 0.4em;
	margin-left: -0.5em; 
	color: #003399;
    }

div.proc ul
    {
    margin-left: 1.5em;
    }

div.proc ol
    {
    margin-left: 2.0em;
    }
      
.note
	{
	margin-left: 14pt;
	margin-right: 12pt;
	}

.indent1
	{
	margin-left: 12pt;
	}

.indent2
	{
	margin-left: 24pt;
	}

.indent3
	{
	margin-left: 36pt;
	}

p.proch
	{
	padding-left: 16px;
	}

p.proch img
	{
	position: relative; 
	vertical-align: top;
	left: -18px; 
	margin-right: -14px; 
	margin-bottom: -18px;
	}
	
div.clsPlatSpec
{
	background-color:#FFF8DC;
	border-style:solid;
	border-width:1pt 0pt 0pt 1pt;
	border-color:#ffE4C4;
	margin-top:0.6em;
	width:100%;
}


/* Applies to the language labels in the Language Filter drop-down list. */
.languageFilter
{
	color:	#0000FF;
	cursor:hand;
	text-decoration:underline;
	padding-bottom:4;
}

/* Dropdown areas */

#languageSpan {
	position: absolute;
	visibility: hidden;
	border-style: solid;
	border-width: 1px;
	border-color: #C8CDDE;
	background: #d4dfff;
	padding: 4px;
	font-size: 70%;
}

#membersOptionsSpan {
	position: absolute;
	visibility: hidden;
	border-style: solid;
	border-width: 1px;
	border-color: #C8CDDE;
	background: #d4dfff;
	padding: 4px;
	font-size: 70%;
}
--></style>

<xml>
<MSHelp:TOCTitle Title="Primitives Sample" />
<MSHelp:RLTitle Title="Primitives Sample" />
<MSHelp:Keyword Index="A" Term="O:Microsoft.Xna.Primitives" />
<MSHelp:Keyword Index="A" Term="1d478399-fe2e-621b-4246-2027981bf672" />
<MSHelp:Keyword Index="K" Term="Primitives Sample" />
<MSHelp:Attr Name="ProjType" Value="LocalProj" />
<MSHelp:Attr Name="ProjType" Value="XNA_20" />
<MSHelp:Attr Name="DocSet" Value="XNA" />
<MSHelp:Attr Name="DocSet" Value="ExpressLibVS" />
<MSHelp:Attr Name="DocSet" Value="C#" />
<MSHelp:Attr Name="Locale" Value="en-us" />
<MSHelp:Attr Name="AssetID" Value="1d478399-fe2e-621b-4246-2027981bf672" />
<MSHelp:Attr Name="TopicType" Value="kbOrient" />
</xml>
</head><body><div id="mainSection"><div id="mainBody">

  <h1>Primitives Sample</h1>
  This sample shows you how to extend the Spacewar <b>VectorShape</b> code to create <b>PrimitiveBatch</b>. This enables you to easily draw points, lines, and triangles on the screen.
  <a name="ID2EP"></a><h1 class="heading">Sample Overview</h1><div id="ID2EP" class="hxnx1">
    
    <p>The Spacewar Windows Starter Kit (2.0) includes a retro mode. The retro mode does all of its drawing with points and lines. This sample shows how you can extend the Spacewar <b>VectorShape</b> code to create <b>PrimitiveBatch</b>, which enables you to easily draw points, lines, and triangles on the screen. Such functionality can be useful, not only for drawing your game, but also for debugging.</p>
    <a name="ID2E1"></a><h2 class="subHeading">Minimum Shader Profile</h2><div id="ID2E1" class="hxnx2">
      
      <dl class="glossary">
        <dt>Vertex Shader Model 1.1</dt>
        <dt>Pixel Shader Model 1.1</dt>
      </dl>
    </div>

    <a name="ID2EGB"></a><h2 class="subHeading">Sample Controls</h2><div id="ID2EGB" class="hxnx2">
      
      <p>This sample uses the following keyboard and gamepad controls.</p>

      <table>
        <tr>
          <th>Action</th>
          <th>Keyboard Control</th>
          <th>Gamepad Control</th>
        </tr>
        <tr>
          <td>Exit.</td>
          <td>ESC or ALT+F4</td>
          <td>
            <b>BACK</b>
          </td>
        </tr>
      </table>
    </div>
  </div>

  <a name="ID2EGC"></a><h1 class="heading">How the Sample Works</h1><div id="ID2EGC" class="hxnx1">
    
   <p>The Spacewar <b>VectorShape</b> code is designed to draw shapes that are set up once, and then not modified throughout the game. However, it is not the easiest component with which to work. For debugging purposes, you may sometimes want to draw arbitrary primitives, without the overhead of setting up a <a href="http://msdn2.microsoft.com/en-us/library/microsoft.xna.framework.graphics.vertexbuffer.aspx">VertexBuffer</a> object.</p> 
    
<p><b>PrimitiveBatch</b> solves this problem by creating an abstraction layer that sits on top of <a href="http://msdn2.microsoft.com/en-us/library/bb196411.aspx">GraphicsDevice.DrawUserPrimitives</a>. To minimize shader changes and the number of draw calls issued, <b>PrimitiveBatch</b>, like <a href="http://msdn2.microsoft.com/en-us/library/microsoft.xna.framework.graphics.spritebatch.aspx">SpriteBatch</a>, follows a <a href="http://msdn2.microsoft.com/en-us/library/microsoft.xna.framework.graphics.spritebatch.begin.aspx">Begin</a>/<a href="http://msdn2.microsoft.com/en-us/library/microsoft.xna.framework.graphics.spritebatch.end.aspx">End</a> pattern. When a user wants to draw using <b>PrimitiveBatch</b>, the user should first call <a href="http://msdn2.microsoft.com/en-us/library/microsoft.xna.framework.graphics.spritebatch.begin.aspx">Begin</a>, call <b>AddVertex</b> the appropriate number of times, and then <a href="http://msdn2.microsoft.com/en-us/library/microsoft.xna.framework.graphics.spritebatch.end.aspx">End</a>.</p>

<p>Internally, <b>PrimitiveBatch</b> maintains an array of vertices, and an index into that array. <b>AddVertex</b> uses this information to fill the array. If there is not enough room in the array, <b>Flush</b> is called. This submits the draw call to the graphics card and resets the array index to zero. Once this is done, copying can resume, starting over at zero.</p>
    
    <p>The main <b>Game</b> class for the sample shows how to use <b>PrimitiveBatch</b> by drawing a scene from Spacewar.</p>

  </div>

</div><div class="footer" id="footer"><p>© 2010 Microsoft Corporation. All rights reserved.<br>Send feedback to <a href="mailto:[email protected]?subject=Documentation Feedback: Primitives Sample">[email protected]</a>.</p></div></div></body></html>