PMAP

• Source: https://www.freebasic.net/wiki/wikka.php?wakka=KeyPgPmap
• Last revised: 2019-02-06

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Maps coordinates between view and physical mapping.

Syntax

` declare function PMap ( byval coord as single, byval func as long ) as single

`

Usage

` result = PMap( coord, func )

`

Parameters

coord

An expression indicating the coordinate to be mapped.

func

The 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.

Examples

start GeSHi

ScreenRes 640, 480
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

end GeSHi

Differences from QB

• None

See also

• Window
• View (Graphics)

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