| whatdotcolor | graphics function |
| Syntax | whatdotcolor ( x, y : int ) : int
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| Description | The whatdotcolor function is used to determine the color number of the specified pixel. The alternate spelling is whatdotcolour.
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| Example | This program draws a line which bounces off the edges of the screen and makes a beep when it finds a pixel that has already been colored.
setscreen ( "graphics" )
var x, y : int := 0
var dx, dx : int := 1
loop
if whatdotcolor ( x, y ) not= 0 then
sound ( 400, 50 )
end if
drawdot ( x, y, 1 )
x := x + dx
y := y + dy
if x = 0 or x = maxx then
dx := -dx
end if
if y = 0 or y = maxy then
dy := -dy
end if
end loop
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| Details | The screen should be in a"graphics" mode. If is not set to "graphics" mode, it will automatically be set to "graphics" mode. See setscreen for details.
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| See also | drawdot, which is used for setting the color of a pixel. See also maxx and maxy, which are used to determine the number of pixels on the screen. See also sound, which causes the computer to make a sound. See also predefined unit View.
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