blitz-research
91 lines
2.0 KiB
HTML
91 lines
2.0 KiB
HTML
<html>
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<head>
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<title>Blitz3D Docs</title>
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<link rel=stylesheet href=../css/commands.css type=text/css>
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</head>
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<body>
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<h1>Floor# ( y# )</h1>
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<h1>Parameters</h1>
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<table>
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<tr>
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<td>
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y = any number
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</td>
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</tr>
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</table>
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<h1>Description</h1>
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<table>
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<tr>
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<td>
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Rounds downward, i.e. in the direction of -Infinity.
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It is a common mistake to think this simply sets everything after the decimal point to zero.
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<br />
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But this is true only for positive numbers:
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Floor( 1.75 ) ....... 1.0
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Floor( -1.75 ) .... -2.0
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See also Ceil and Int for other types of rounding.
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</td>
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</tr>
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</table>
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<h1><a href=../2d_examples/Floor.bb>Example</a></h1>
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<table>
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<tr>
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<td>
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; Ceil / Floor / Int example, three kinds of rounding.
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<br />
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; Move mouse. Escape quits.
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Graphics 640, 480
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Const KEY_ESC = 1
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SetBuffer BackBuffer()
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Origin 320, 240
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MoveMouse 320, 240 : HidePointer
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While Not KeyDown( KEY_ESC )
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Cls
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my = MouseY() - 240
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Color 100, 100, 0
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Line -320, my, 319, my
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DrawNumberLine
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y# = Float( -my ) / 32
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Text 100, 50, " y = " + y
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Text 100, 70, " Ceil( y ) = " + Ceil( y )
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Text 100, 90, " Floor( y ) = " + Floor( y )
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Text 100, 110, " Int( y ) = " + Int( y )
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Flip
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Wend
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End
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Function DrawNumberLine( ) ; vertical line with numeric labels
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Color 255, 255, 255
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Line 0, -240, 0, 239
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For n = -7 To 7
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yn = -32 * n
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Line -2, yn, 2, yn
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Text -30, yn - 6, RSet( n, 2 )
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Next
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End Function
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</td>
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</tr>
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</table>
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<br>
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<a target=_top href=../index.htm>Index</a><br>
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<br>
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Click <a href=http://www.blitzbasic.co.nz/b3ddocs/command.php?name=Floor&ref=comments target=_blank>here</a> to view the latest version of this page online</body>
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</html>
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