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<TITLE>hardScroll</TITLE>
<link rel="stylesheet" type="text/css" href="style.css" />
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<div align="center"><img id="headerGraphic" src="images/sludge300.png" alt="SLUDGE"/></div>
<h2>hardScroll</h2>
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<H3>Syntax:</H3>
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<pre class="syntax">hardScroll (<i>numberOfRows</i>);</pre>
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<H3>Purpose:</H3>
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Scrolls the background image up and down.
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If <i>numberOfRows</i> is positive, the background image scrolls up: the top <i>numberOfRows</i> lines of the image are lost, and <i>numberOfRows </i>blank lines are added to the bottom. If <i>numberOfRows</i> is negative, the background image scrolls down. If <i>numberOfRows</i> is 0 the function has no effect.
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<P>
Should the value of <i>numberOfRows</i> be greater than the height of the background image (or less than 0 minus the height of the background image) the background image will be blanked completely, as if <a href="blankScreen.html">blankScreen</a> had been called.
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<P>
This function is very useful for scrolling credits, but probably very little else - unless, that is, someone proves me wrong. The function is <b>not</b> for scrolling around scenes which are larger than the screen or window - try <a href="setSceneDimensions.html">setSceneDimensions</a> and <a href="aimCamera.html">aimCamera</a> instead.
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<H3>Return value:</H3>
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No return value.
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<H3>See also:</H3>
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<a href="The_Background_Image.html">The Background Image</a>
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<P>
<a href="setBlankColour_(setBlankColor).html">setBlankColour (setBlankColor)</a>
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<P class="copyright-notice">SLUDGE and this SLUDGE documentation are <A HREF="Copyright.html">copyright</A> Hungry Software and contributors 2000-2012
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