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SciJava Common is a shared library for SciJava software. It provides a plugin framework, with an extensible mechanism for service discovery, backed by its own annotation processor, so that plugins can be loaded dynamically. It is used by downstream projects in the SciJava ecosystem, such as ImageJ and SCIFIO.
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package org.scijava.util;
/**
* A class for representing a rectangular region, in integer coordinates.
*
* It exists mainly to avoid AWT references to {@link java.awt.Rectangle}.
*
*
* @author Barry DeZonia
*/
public class IntRect {
// -- Fields --
public int x;
public int y;
public int width;
public int height;
// -- Constructor --
public IntRect() {
// default constructor - allow all instance vars to be initialized to 0
}
public IntRect(final int x, final int y, final int width, final int height) {
this.x = x;
this.y = y;
this.width = width;
this.height = height;
}
// -- IntRect methods --
/** Returns true if this rect intersects the given rect. */
public boolean intersects(final IntRect r) {
int tw = this.width;
int th = this.height;
int rw = r.width;
int rh = r.height;
if (rw <= 0 || rh <= 0 || tw <= 0 || th <= 0) {
return false;
}
final int tx = this.x;
final int ty = this.y;
final int rx = r.x;
final int ry = r.y;
rw += rx;
rh += ry;
tw += tx;
th += ty;
final boolean rtn =
(rw < rx || rw > tx) && (rh < ry || rh > ty) && (tw < tx || tw > rx) &&
(th < ty || th > ry);
return rtn;
}
/**
* Returns a Rect representing the intersection of this Rect with the given
* Rect. If the two Rects do not intersect, the result is an empty Rect.
*/
public IntRect intersection(final IntRect r) {
final int newX = Math.max(this.x, r.x);
final int newY = Math.max(this.y, r.y);
int newW = Math.min(this.x + this.width, r.x + r.width) - x;
int newH = Math.min(this.y + this.height, r.y + r.height) - y;
if (newW < 0) newW = 0;
if (newH < 0) newH = 0;
return new IntRect(newX, newY, newW, newH);
}
/** Tests whether the given coordinates lie within the rectangle. */
public boolean contains(final IntCoords coords) {
return coords.x >= this.x && coords.x < this.x + this.width &&
coords.y >= this.y && coords.y < this.y + this.height;
}
/** Gets the top left coordinate of the rectangle. */
public IntCoords getTopLeft() {
return new IntCoords(x, y);
}
/** Gets the bottom right coordinate of the rectangle. */
public IntCoords getBottomRight() {
return new IntCoords(x + width, y + height);
}
// -- Object methods --
@Override
public String toString() {
return "x=" + x + ", y=" + y + ", w=" + width + ", h=" + height;
}
@Override
public boolean equals(final Object o) {
if (!(o instanceof IntRect)) return false;
final IntRect rect = (IntRect) o;
return x == rect.x && y == rect.y && width == rect.width &&
height == rect.height;
}
@Override
public int hashCode() {
// combine 8 least significant bits of x, y, width and height
final int b1 = x & 0xff;
final int b2 = y & 0xff;
final int b3 = width & 0xff;
final int b4 = height & 0xff;
return b1 | (b2 << 8) | (b3 << 16) | (b4 << 24);
}
}