/**
* Sets this box to the intersection of it and the specified box; in other words to the volume
* encompassed by both boxes.
*
* <p>If the boxes don't intersect, the x2, y2 and z2 coordinates of this box will be made equal
* to the x1, y1 and z1 coordinates so that it becomes empty.
*
* @param box The box to intersect this box with.
*/
public void intersect(Box box) {
normalise();
box.normalise();
if ((box.x1 >= x2)
|| (box.x2 <= x1)
|| (box.y1 >= y2)
|| (box.y2 <= y1)
|| (box.z1 >= z2)
|| (box.z2 <= z1)) {
// The boxes don't intersect
x2 = x1;
y2 = y1;
z2 = z1;
} else {
if (box.x1 > x1) {
x1 = box.x1;
}
if (box.x2 > x2) {
x2 = box.x2;
}
if (box.y1 > y1) {
y1 = box.y1;
}
if (box.y2 > y2) {
y2 = box.y2;
}
if (box.z1 > z1) {
z1 = box.z1;
}
if (box.z2 > z2) {
z2 = box.z2;
}
}
}
/**
* Extends this box so that it encompasses the other box
*
* @param box The box to encompass.
*/
public void encompass(Box box) {
normalise();
box.normalise();
if (box.x1 < x1) {
x1 = box.x1;
}
if (box.x2 > x2) {
x2 = box.x2;
}
if (box.y1 < y1) {
y1 = box.y1;
}
if (box.y2 > y2) {
y2 = box.y2;
}
if (box.z1 < z1) {
z1 = box.z1;
}
if (box.z2 > z2) {
z2 = box.z2;
}
}