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Ceil.htm

Ceil.htm 1.8 KB
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  1. <html>
    2. 

  2. <head>
    3. 

  3. <title>Blitz3D Docs</title>
    4. 

  4. <link rel=stylesheet href=../css/commands.css type=text/css>
    5. 

  5. </head>
    6. 

  6. <body>
    7. 

  7. <h1>Ceil# ( y# )</h1>
    8. 

  8. <h1>Parameters</h1>
    9. 

  9. <table>
    10. 

  10. <tr>
    11. 

  11. <td>
    12. 

  12. y = any number
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  13. </td>
    14. 

  14. </tr>
    15. 

  15. </table>
    16. 

  16. <h1>Description</h1>
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  17. <table>
    18. 

  18. <tr>
    19. 

  19. <td>
    20. 

  20. As with Floor there is often some confusion with negative numbers:

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    21. 

  21. 
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    22. 

  22. Ceil(  1.75 ) ...... 2.0

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    23. 

  23. Ceil( -1.75 ) ... -1.0

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    24. 

  24. 
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    25. 

  25. See also Floor and Int for other types of rounding.
    26. 

  26. </td>
    27. 

  27. </tr>
    28. 

  28. </table>
    29. 

  29. <h1><a href=../2d_examples/Ceil.bb>Example</a></h1>
    30. 

  30. <table>
    31. 

  31. <tr>
    32. 

  32. <td>
    33. 

  33. ; Ceil / Floor / Int example, three kinds of rounding.
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    34. 

  34. 
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    35. 

  35. ; Move mouse. Escape quits.
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    36. 

  36. 
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    37. 

  37. Graphics 640, 480
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    38. 

  38. 
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    39. 

  39. Const KEY_ESC = 1
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    40. 

  40. 
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    41. 

  41. SetBuffer BackBuffer()
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    42. 

  42. Origin 320, 240
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    43. 

  43. 
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    44. 

  44. MoveMouse 320, 240  :  HidePointer
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    45. 

  45. 
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    46. 

  46. While Not KeyDown( KEY_ESC )
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    47. 

  47. 
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    48. 

  48. Cls
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    49. 

  49. 
<br />
    50. 

  50. my = MouseY() - 240
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    51. 

  51. Color 100, 100, 0
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    52. 

  52. Line -320, my, 319, my
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    53. 

  53. 
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    54. 

  54. DrawNumberLine
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    55. 

  55. 
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    56. 

  56. y# = Float( -my ) / 32
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    57. 

  57. 
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    58. 

  58. Text 100, 50, "          y = "  + y
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    59. 

  59. Text 100, 70, "  Ceil( y ) = "  + Ceil( y )
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    60. 

  60. Text 100, 90, " Floor( y ) = "  + Floor( y )
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    61. 

  61. Text 100, 110, "   Int( y ) = " + Int( y )
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    62. 

  62. 
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    63. 

  63. Flip
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    64. 

  64. 
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    65. 

  65. Wend
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    66. 

  66. End
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    67. 

  67. 
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    68. 

  68. Function DrawNumberLine( )  ; vertical line with numeric labels
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    69. 

  69. 
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    70. 

  70. Color 255, 255, 255
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    71. 

  71. Line 0, -240, 0, 239
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    72. 

  72. 
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    73. 

  73. For n = -7 To 7
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    74. 

  74. yn = -32 * n
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    75. 

  75. Line -2, yn, 2, yn
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    76. 

  76. Text -30, yn - 6, RSet( n, 2 )
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    77. 

  77. Next
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    78. 

  78. 
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    79. 

  79. End Function
    80. 

  80. </td>
    81. 

  81. </tr>
    82. 

  82. </table>
    83. 

  83. <br>
    84. 

  84. <a target=_top href=../index.htm>Index</a><br>
    85. 

  85. <br>
    86. 

  86. Click <a href=http://www.blitzbasic.co.nz/b3ddocs/command.php?name=Ceil&ref=comments target=_blank>here</a> to view the latest version of this page online</body>
    87. 

  87. </html>
    88.