Hi,
Under certain conditions I find the following:
[code]
Area a, b;
(a.equals(b) && b.equals(a)) != (a.isRectangular && b.isRectangular())
[/code]
Is this a bug? Or am I missing something?
The following code demonstrates the problem:
[code]
import java.awt.Polygon;
import java.awt.Rectangle;
import java.awt.geom.AffineTransform;
import java.awt.geom.Area;
import java.awt.geom.Rectangle2D;
public class TestArea {
public static void main(String[] args) {
Area horizontal = new Area();
for (int x = 0; x < 2; x++) {
horizontal.add(new Area(new Rectangle2D.Double(x, 0, 1, 1)));
}
print("Horiz.", horizontal);
Area vertical = new Area();
for (int y = 0; y < 2; y++) {
vertical.add(new Area(new Rectangle2D.Double(0, y, 1, 1)));
}
print("Vert.", vertical);
Area square = new Area();
for (int x = 0; x < 2; x++) {
for (int y = 0; y < 2; y++) {
square.add(new Area(new Rectangle2D.Double(x, y, 1, 1)));
}
}
print("Square", square);
/*
* Now is there a difference between a rotated square and a
* polygon that, in effect, represents a rotated square.
*/
System.out.println();
Area rotated = new Area(new Rectangle(1, 1, 1, 1));
rotated.transform(AffineTransform
.getQuadrantRotateInstance(1, 1.5, 1.5));
print("Rotated", rotated);
Area polygon = new Area(new Polygon(new int[] { 1, 2, 1, 0 },
new int[] { 0, 1, 2, 1 }, 4));
print("Polygon", polygon);
}
public static void print(String name, Area a) {
Area b = new Area(a.getBounds2D());
System.out.println(name
+ "\t a.equals(b): " + a.equals(b)
+ "\t b(equals(a): " + b.equals(a)
+ "\t b.isRectangular(): " + b.isRectangular()
+ "\t a.isRectangular(): " + a.isRectangular()
);
}
}
[/code]
This is the output I get:
[pre]
Horiz. a.equals(b): true b(equals(a): true b.isRectangular():
true a.isRectangular(): true
Vert. a.equals(b): true b(equals(a): true b.isRectangular():
true a.isRectangular(): false
Square a.equals(b): true b(equals(a): true b.isRectangular():
true a.isRectangular(): false
Rotated a.equals(b): true b(equals(a): true b.isRectangular():
true a.isRectangular(): true
Polygon a.equals(b): false b(equals(a): false b.isRectangular():
true a.isRectangular(): false
[/pre]
(An additional test examens the behaviour of a rotated Area and an Area that is
filled with a polygon that, in effect, represents a rotated square)
Thanks for any insights
Piet
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