| Safe Haskell | None |
|---|---|
| Language | Haskell98 |
Graphics.Gloss.Data.ViewPort
- data ViewPort = ViewPort {
- viewPortTranslate :: !(Float, Float)
- viewPortRotate :: !Float
- viewPortScale :: !Float
- viewPortInit :: ViewPort
- applyViewPortToPicture :: ViewPort -> Picture -> Picture
- invertViewPort :: ViewPort -> Point -> Point
Documentation
data ViewPort
The ViewPort represents the global transformation applied to the displayed picture.
When the user pans, zooms, or rotates the display then this changes the ViewPort.
Constructors
| ViewPort | |
Fields
| |
The initial state of the viewport.
applyViewPortToPicture :: ViewPort -> Picture -> Picture
Translates, rotates, and scales an image according to the ViewPort.
invertViewPort :: ViewPort -> Point -> Point
Takes a point using screen coordinates, and uses the ViewPort to convert
it to Picture coordinates. This is the inverse of applyViewPortToPicture
for points.