PMap
Maps coordinates between view and physical mapping.
result = PMap( coord, func )
coord
The mapped coordinate value.
This function converts a coordinate between view (as defined by the Window statement) and physical (as set by the View (Graphics) statement) mappings. Depending on the value of func, expr is used to compute a different mapping to be returned by PMap:
Syntax
Usage
result = PMap( coord, func )
Parameters
coord
An expression indicating the coordinate to be mapped.
funcThe mapping function number to be applied to given coordinate.
Return Value
The mapped coordinate value.
Description
This function converts a coordinate between view (as defined by the Window statement) and physical (as set by the View (Graphics) statement) mappings. Depending on the value of func, expr is used to compute a different mapping to be returned by PMap:
| func value: | return value: |
| 0 | Treats expr as x view coordinate and returns corresponding x physical coordinate. |
| 1 | Treats expr as y view coordinate and returns corresponding y physical coordinate. |
| 2 | Treats expr as x physical coordinate and returns corresponding x view coordinate. |
| 3 | Treats expr as y physical coordinate and returns corresponding y view coordinate. |
Example
Screen 12
Window Screen (0, 0)-(100, 100)
Print "Logical x=50, Physical x="; PMap(50, 0) '' 320
Print "Logical y=50, Physical y="; PMap(50, 1) '' 240
Print "Physical x=160, Logical x="; PMap(160, 2) '' 25
Print "Physical y=60, Logical y="; PMap(60, 3) '' 12.5
Sleep
Window Screen (0, 0)-(100, 100)
Print "Logical x=50, Physical x="; PMap(50, 0) '' 320
Print "Logical y=50, Physical y="; PMap(50, 1) '' 240
Print "Physical x=160, Logical x="; PMap(160, 2) '' 25
Print "Physical y=60, Logical y="; PMap(60, 3) '' 12.5
Sleep
Differences from QB
- None
See also