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65 lines
2.4 KiB
Plaintext
65 lines
2.4 KiB
Plaintext
The '''PMAP''' statement returns the physical or [[WINDOW]] view port coordinates.
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{{PageSyntax}}
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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]] statement and the physical screen coordinates of the viewport as defined by the [[VIEW]] statement.
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* Mouse co-ordinates returned by [[_MOUSEX]] and [[_MOUSEY]] are the physical screen co-ordinates.
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''Example:'' Use PMAP to convert coordinate values from view to screen coordinates and from screen coordinates to view coordinates.
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{{CodeStart}} '' ''
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{{Cl|SCREEN (statement)|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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{{Cl|WINDOW}} {{Cl|SCREEN (statement)|SCREEN}} (90, 100)-(200, 200) 'coordinates of lower-right 'corner are 200, 200.
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X = {{Cl|PMAP}}(90, 0) ' X = 0
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{{Cl|PRINT}} X
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Y = {{Cl|PMAP}}(100, 1) ' Y = 0
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{{Cl|PRINT}} Y
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'These statements return the screen coordinates equal to the view coordinates 200, 200.
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X = {{Cl|PMAP}}(200, 0) ' X = 639
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{{Cl|PRINT}} X
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Y = {{Cl|PMAP}}(200, 1) ' Y = 479
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{{Cl|PRINT}} Y
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'These statements return the view coordinates equal to the screen coordinates 0, 0
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X = {{Cl|PMAP}}(0, 0)
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{{Cl|PRINT}} X
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Y = {{Cl|PMAP}}(0, 0)
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{{Cl|PRINT}} Y
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'These statements return the view coordinates equal to the screen coordinates 639, 479.
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X = {{Cl|PMAP}}(639, 2) ' X = 200
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{{Cl|PRINT}} X
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Y = {{Cl|PMAP}}(479, 3) ' Y = 200
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{{Cl|PRINT}} Y
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{{Cl|SLEEP}} ' pause before clearing view port
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{{Cl|CLS}} 1 ' clear grahic view port
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{{Cl|WINDOW}} ' end graphic view port
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{{Cl|END}} '' ''
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{{CodeEnd}}
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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]], [[VIEW]]
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* [[VIEW PRINT]]
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{{PageNavigation}}
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