Game Development Reference
In-Depth Information
/**
* Constructs a new <code>Rectangle</code> whose top-left corner is
* specified as (<code>x</code>, <code>y</code>) and whose width
* and height are specified by the arguments of the same name.
*
* @param x
* the specified x coordinate
* @param y
* the specified y coordinate
* @param width
* the width of the <code>Rectangle</code>
* @param height
* the height of the <code>Rectangle</code>
*/
public Rectangle(int x, int y, int width, int height) {
this.x = x;
this.y = y;
this.width = width;
this.height = height;
}
public boolean contains(int X, int Y, int W, int H) {
int w = this.width;
int h = this.height;
if ((w | h | W | H) < 0) {
// At least one of the dimensions is negative...
return false;
}
// Note: if any dimension is zero, tests below must return false...
int x = this.x;
int y = this.y;
if (X < x || Y < y) {
return false;
}
w += x;
W += X;
if (W <= X) {
// X+W overflowed or W was zero, return false if...
// either original w or W was zero or
// x+w did not overflow or
// the overflowed x+w is smaller than the overflowed X+W
if (w >= x || W > w) {
return false;
}
} else {
// X+W did not overflow and W was not zero, return false if...
// original w was zero or
