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Thread: Rotating 90 degrees

  1. Jun 21st, 2001, 03:04 PM #1
    MerryVIP
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    Rotating 90 degrees

    Is it possible to rotate image by 90 degrees without using GetPixel and SetPixel?
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  2. Jun 21st, 2001, 03:21 PM #2
    Sastraxi
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    Well there's DirectX
    All contents of the above post that aren't somebody elses are mine, not the property of some media corporation.
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  3. Jun 21st, 2001, 03:36 PM #3
    MerryVIP
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    VB4, can't use DX.
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  4. Jun 21st, 2001, 03:43 PM #4
    Sastraxi
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    UPGRADE!
    All contents of the above post that aren't somebody elses are mine, not the property of some media corporation.
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  6. Jun 22nd, 2001, 05:42 AM #5
    PsychoMark
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    Use BitBlt for every pixel
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  7. Jun 22nd, 2001, 06:03 AM #6
    Jotaf98
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    Use stretchblt, you can use negative numbers for width/height to rotate it 90º
    Code:
    Temp = Me.GetIQ()
'Error 9: Overflow
'DON'T PANIC! :eek:

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  8. Jun 22nd, 2001, 06:19 AM #7
    PsychoMark
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    Wouldn't that just mirror and flip the picture?
    Teaudirenopossum.Musasapientumfixaestinaure.
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  9. Jun 22nd, 2001, 12:43 PM #8
    kedaman
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    yep it would

    Use c++, loop trough all pixels
    counter clockwise

    newX=-oldY;
    newY=oldX;

    clockwise

    newX=oldY;
    newY=-newX;
    Use
    writing software in C++ is like driving rivets into steel beam with a toothpick.
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    reverse (p (6*9)) where p x|x==0=""|True=chr (48+z): p y where (y,z)=divMod x 13
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  11. Jun 22nd, 2001, 04:13 PM #9
    MerryVIP
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    PsychoMark, thanks for the BilBlt pixel-by-pixel idea. It really works faster than GetPixel/SetPixel, atleast my game loads much faster now
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  12. Jun 23rd, 2001, 02:20 AM #10
    PsychoMark
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    Wow, never though it would actually work faster. Thanks for letting me know too...
    Teaudirenopossum.Musasapientumfixaestinaure.
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  13. Jun 23rd, 2001, 05:02 PM #11
    MerryVIP
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    Maybe it has something to do with the number of API calls. Like, with GetPixel & SetPixel you need more VB code in the middle. You never know for sure.
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