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/**
* Copyright 2010 JogAmp Community. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are
* permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* The views and conclusions contained in the software and documentation are those of the
* authors and should not be interpreted as representing official policies, either expressed
* or implied, of JogAmp Community.
*/
package javax.media.nativewindow.util;
import java.util.List;
public class Rectangle implements Cloneable, RectangleImmutable {
int x;
int y;
int width;
int height;
public Rectangle() {
this(0, 0, 0, 0);
}
public Rectangle(int x, int y, int width, int height) {
this.x=x;
this.y=y;
this.width=width;
this.height=height;
}
@Override
public Object cloneMutable() {
return clone();
}
@Override
protected Object clone() {
try {
return super.clone();
} catch (CloneNotSupportedException ex) {
throw new InternalError();
}
}
@Override
public final int getX() { return x; }
@Override
public final int getY() { return y; }
@Override
public final int getWidth() { return width; }
@Override
public final int getHeight() { return height; }
public final void set(int x, int y, int width, int height) {
this.x = x;
this.y = y;
this.width = width;
this.height = height;
}
public final void setX(int x) { this.x = x; }
public final void setY(int y) { this.y = y; }
public final void setWidth(int width) { this.width = width; }
public final void setHeight(int height) { this.height = height; }
@Override
public final RectangleImmutable union(final RectangleImmutable r) {
return union(r.getX(), r.getY(), r.getX() + r.getWidth(), r.getY() + r.getHeight());
}
@Override
public final RectangleImmutable union(final int rx1, final int ry1, final int rx2, final int ry2) {
final int x1 = Math.min(x, rx1);
final int y1 = Math.min(y, ry1);
final int x2 = Math.max(x + width, rx2);
final int y2 = Math.max(y + height, ry2);
return new Rectangle(x1, y1, x2 - x1, y2 - y1);
}
/**
* Calculates the union of the given rectangles, stores it in this instance and returns this instance.
* @param rectangles given list of rectangles
* @return this instance holding the union of given rectangles.
*/
public final Rectangle union(final List rectangles) {
int x1=Integer.MAX_VALUE, y1=Integer.MAX_VALUE;
int x2=Integer.MIN_VALUE, y2=Integer.MIN_VALUE;
for(int i=rectangles.size()-1; i>=0; i--) {
final RectangleImmutable vp = rectangles.get(i);
x1 = Math.min(x1, vp.getX());
x2 = Math.max(x2, vp.getX() + vp.getWidth());
y1 = Math.min(y1, vp.getY());
y2 = Math.max(y2, vp.getY() + vp.getHeight());
}
set(x1, y1, x2 - x1, y2 - y1);
return this;
}
@Override
public final RectangleImmutable intersection(RectangleImmutable r) {
return intersection(r.getX(), r.getY(), r.getX() + r.getWidth(), r.getY() + r.getHeight());
}
@Override
public final RectangleImmutable intersection(final int rx1, final int ry1, final int rx2, final int ry2) {
final int x1 = Math.max(x, rx1);
final int y1 = Math.max(y, ry1);
final int x2 = Math.min(x + width, rx2);
final int y2 = Math.min(y + height, ry2);
final int ix, iy, iwidth, iheight;
if( x2 < x1 ) {
ix = 0;
iwidth = 0;
} else {
ix = x1;
iwidth = x2 - x1;
}
if( y2 < y1 ) {
iy = 0;
iheight = 0;
} else {
iy = y1;
iheight = y2 - y1;
}
return new Rectangle (ix, iy, iwidth, iheight);
}
@Override
public final float coverage(RectangleImmutable r) {
final RectangleImmutable isect = intersection(r);
final float sqI = (float) ( isect.getWidth()*isect.getHeight() );
final float sqT = (float) ( width*height );
return sqI / sqT;
}
@Override
public int compareTo(final RectangleImmutable d) {
{
final int sq = width*height;
final int xsq = d.getWidth()*d.getHeight();
if(sq > xsq) {
return 1;
} else if(sq < xsq) {
return -1;
}
}
{
final int sq = x*y;
final int xsq = d.getX()*d.getY();
if(sq > xsq) {
return 1;
} else if(sq < xsq) {
return -1;
}
}
return 0;
}
@Override
public boolean equals(Object obj) {
if(this == obj) { return true; }
if (obj instanceof Rectangle) {
Rectangle rect = (Rectangle)obj;
return (y == rect.y) && (x == rect.x) &&
(height == rect.height) && (width == rect.width);
}
return false;
}
@Override
public int hashCode() {
int sum1 = x + height;
int sum2 = width + y;
int val1 = sum1 * (sum1 + 1)/2 + x;
int val2 = sum2 * (sum2 + 1)/2 + y;
int sum3 = val1 + val2;
return sum3 * (sum3 + 1)/2 + val2;
}
@Override
public String toString() {
return "[ "+x+" / "+y+" "+width+" x "+height+" ]";
}
}
