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Newcomers DBPro Corner / 2D Circle Question

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Hopilite

Years of Service

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Joined: 19th Jan 2004

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Posted: 19th Jan 2004 22:29

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In DBC, After I create a circle with a radius and position based on variables, how would I determine if an object is in the circle, and tell how far the object is away from the the center of the circle.
Thanks

Some people say 2+2=Fish.
I don't.

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Easily Confused

Years of Service

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Joined: 22nd Oct 2002

Location: U.K. Earth. (turn right at Venus)

Posted: 19th Jan 2004 23:43

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You need the good old 2D distance formula

+ Code Snippet

sync on : sync rate 50

circleX = 320
circleY = 240
radius = 100

do
  cls
  circle circleX,circleY,radius

  d# = Distance2D(circleX,circleY,mousex(),mousey())

  if d# < radius
    text 50,50,"Inside Circle!"
  else
    text 50,50,"Outside Circle!"
  endif

  sync
loop

Function Distance2D(cx#,cy#,x#,y#)
  dx# = cx# - x#
  dy# = cy# - y#
  dist# = sqrt((dx#*dx#)+(dy#*dy#))
endfunction dist#

Programming anything is an art, and you can't rush art.
Unless your name is Bob Ross, then you can do it in thirty minutes.

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Newcomers DBPro Corner / 2D Circle Question