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drawline

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Tristan Hume edited this page Apr 23, 2012 · 3 revisions

#drawline

##Syntax drawline (x1, y1, x2, y2, Color : int)

##Description The drawline procedure is used to draw a line on the screen from (x1, y1) to (x2, y2) using the specified Color.

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##Example This program draws a large X, reaching to each corner of the screen using color number 1. The maxx and maxy functions are used to determine the maximum x and y values on the screen. The point (0,0) is the left bottom of the screen, (maxx, maxy) is the right top, etc.

    setscreen ("graphics")
    % First draw a line from the left bottom to right top
    drawline (0, 0, maxx, maxy, 1) 
    % Now draw a line from the left top to right bottom
    drawline (0, maxy, maxx, 0, 1)

##Details The meaning of the Color number depends on the current palette. See the palette statement.

The screen should be in a "graphics" mode. See the setscreen procedure for details. If the screen is not in a "graphics" mode, it will automatically be set to "graphics" mode.

##See also setscreen.html, maxx.html, maxy.html and the various draw� procedures.

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