id,summary,reporter,owner,description,type,status,priority,milestone,version,resolution,keywords,cc
24,GLUT mouse coordinates do not appear to match 2D graphics coordinates,cgibbard,,"Here is a program in which a disc should follow the mouse cursor. Instead, the coordinate scaling is a little different, so they only meet when the mouse is in the centre of the view. 

{{{
import Control.Applicative
import Data.VectorSpace
import FRP.Reactive
import FRP.Reactive.GLUT.Adapter
import Graphics.FieldTrip
import FRP.Reactive.FieldTrip

main = anim2 myDisk

myDisk ui = motion . pure $ uscale2 (0.1 :: Double) *% udisk
  where motion = liftA2 (*%) (fmap translate2 mouse)
        mouse = fmap (uncurry vector2) (mousePosition ui)
}}}",defect,new,major,,,,,