Results 1 to 2 of 2

Thread: ROTATE a drawing on a picture box??? !

  1. Apr 15th, 2003, 03:41 PM #1
    FiDz
    FiDz is offline

    Thread Starter
    Member
    Join Date
    Mar 2003
    Posts
    51

    Lightbulb ROTATE a drawing on a picture box??? !

    hi,
    i have a picture box,and i can draw on it.

    how can i get rotate 360 degree ???? whats the algorithm???
    i don't want any API, i want it pure algorithm.???


    another question,am building an OCR system, but when
    reading from a scanner,and testing each pixel,the performance
    goes down....is there any way rather than searching the
    picutre sequentially??
    FiDz
    Reply With Quote Reply With Quote
  2. Apr 16th, 2003, 08:34 AM #2
    kedaman
    kedaman is offline
    transcendental analytic kedaman's Avatar
    Join Date
    Mar 2000
    Location
    0x002F2EA8
    Posts
    7,221
    to rotate 360 degres is the same as not rotating at all. to rotate (x,y) a degrees:
    newx=x*c-y*s
    newy=x*s+y*s
    where
    c=cos(a/180*3.1415)
    s=sin(a/180*3.1415)
    Use
    writing software in C++ is like driving rivets into steel beam with a toothpick.
    writing haskell makes your life easier:
    reverse (p (6*9)) where p x|x==0=""|True=chr (48+z): p y where (y,z)=divMod x 13
    To throw away OOP for low level languages is myopia, to keep OOP is hyperopia. To throw away OOP for a high level language is insight.
    Reply With Quote Reply With Quote
« Previous Thread | Next Thread »

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Forum Rules


Click Here to Expand Forum to Full Width