| drawPolygon |
(Object obj, Array xpoints, Array ypoints [, int count]) |
yoix.graphics |
| drawPolygon |
(Object obj, Number x0, Number y0, Number x1, Number y1, ...) |
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Draws a polygon in
obj,
which must be an
Image
or a drawable component (i.e., a Swing or AWT component, like a
JCanvas,
JFrame,
or
Canvas,
that supports a
paint
function),
that connects points whose x and y coordinates are supplied as numbers in the
xpoints
and
ypoints
arrays.
The number of points in the polygon can be specified by the optional
count
argument, which must be less than or equal to the number of elements in both
xpoints
and
ypoints.
When
count
is omitted
drawPolygon
chooses a value that is the minimum of the size of the
xpoints
and
ypoints
arrays.
The Yoix implementation of
drawPolygon
also accepts x and y coordinates of the points in the polygon as arguments.
The polygon is always closed by a line segment that connects the first
and last points.
The polygon is drawn in the
foreground
color selected by the
Graphics
object associated with
obj.
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| Example: |
The program,
import yoix.*.*;
Star(double xcenter, double ycenter) {
return(
new Array {
xcenter + 0, ycenter + -50,
xcenter + 29, ycenter + 40,
xcenter + -47, ycenter + -15,
xcenter + 47, ycenter + -15,
xcenter + -29, ycenter + 40,
}
);
}
JFrame frame = {
Array layout = {
new JCanvas {
Color background = Color.black;
Graphics graphics = {
Color foreground = Color.red;
};
paint(clip) {
drawPolygon(this, unroll(Star(72, 72*2)));
}
},
};
};
frame.visible = TRUE;
sleep(5);
exit(0);
defines a paint function in a canvas that draws a five pointed star in red
that is centered 1 inch from the left and 2 inches from the top of the
canvas.
The x and y coordinates of the star are returned in an array
by the function named
Star.
The polygon is drawn by unrolling those coordinates using the
unroll
built-in and handing them to
drawPolygon.
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| See Also: |
clearRect,
copyArea,
drawArc,
drawImage,
drawLine,
drawOval,
drawPolyline,
drawRect,
drawRoundRect,
drawString,
fillArc,
fillOval,
fillPolygon,
fillRect,
fillRoundRect,
pointInPolygon,
pointInRect,
rectContainsRect,
rectIntersectionRect,
rectIntersectsRect,
rectUnionRect,
stringBounds,
stringWidth
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Yoix is a registered trademark of AT&T Inc.
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