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64 lines
2.2 KiB
Markdown
64 lines
2.2 KiB
Markdown
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The **PMAP** statement returns the physical or [WINDOW](WINDOW) view port coordinates.
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## Syntax
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> PMAP (*coordinate*, *function_number%*)
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* The *coordinate* is the coordinate point to be mapped.
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* The *function* can have one of four values:
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> 0 = Maps view port coordinate to physical x screen coordinate
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> 1 = Maps view port coordinate to physical y screen coordinate
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> 2 = Maps physical screen coordinate to view port x coordinate
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> 3 = Maps physical screen coordinate to view port y coordinate
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* The four PMAP functions allow the user to find equal point locations between the view coordinates created with the [WINDOW](WINDOW) statement and the physical screen coordinates of the viewport as defined by the [VIEW](VIEW) statement.
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* Mouse co-ordinates returned by [_MOUSEX](_MOUSEX) and [_MOUSEY](_MOUSEY) are the physical screen co-ordinates.
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## Example(s)
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Use PMAP to convert coordinate values from view to screen coordinates and from screen coordinates to view coordinates.
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```vb
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SCREEN 12
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'Coordinates of upper-left corner of the window is defined in following statement are (90,100)
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WINDOW SCREEN (90, 100)-(200, 200) 'coordinates of lower-right 'corner are 200, 200.
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X = PMAP(90, 0) ' X = 0
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PRINT X
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Y = PMAP(100, 1) ' Y = 0
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PRINT Y
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'These statements return the screen coordinates equal to the view coordinates 200, 200.
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X = PMAP(200, 0) ' X = 639
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PRINT X
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Y = PMAP(200, 1) ' Y = 479
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PRINT Y
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'These statements return the view coordinates equal to the screen coordinates 0, 0
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X = PMAP(0, 0)
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PRINT X
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Y = PMAP(0, 0)
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PRINT Y
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'These statements return the view coordinates equal to the screen coordinates 639, 479.
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X = PMAP(639, 2) ' X = 200
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PRINT X
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Y = PMAP(479, 3) ' Y = 200
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PRINT Y
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SLEEP ' pause before clearing view port
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CLS 1 ' clear grahic view port
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WINDOW ' end graphic view port
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END
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```
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> *Note:* If physical screen coordinates are (0, 0) in the upper-left corner and (639, 479) in the lower-right corner, then the statements return the screen coordinate's equal to the view coordinates 90, 100.
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## See Also
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* [WINDOW](WINDOW), [VIEW](VIEW)
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* [VIEW PRINT](VIEW-PRINT)
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