Pmap

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PMap

Converts a coordinate between the Window system and physical pixels.

Syntax

Declare Function PMap ( ByVal coord As Single, ByVal func As Long ) As Single

Parameters

• coord
• func

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.

Return Value

The mapped coordinate value.

Remarks

Usage

result = PMap( coord, func )

Differences from QB

• None

See also

• Window
• View (Graphics)

Examples

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

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Category: Screen Functions
Kind: function

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Reproduced from the FreeBASIC Wiki Manual under the GNU Free Documentation License 1.3 — with no Invariant Sections, no Front-Cover Texts and no Back-Cover Texts. Copyright © the FreeBASIC project and wiki contributors. See License.