public void expand(final Shape s) {
Prism r = s.getMBR();
if (r.t1 < this.t1) this.t1 = r.t1;
if (r.t2 > this.t2) this.t2 = r.t2;
if (r.x1 < this.x1) this.x1 = r.x1;
if (r.x2 > this.x2) this.x2 = r.x2;
if (r.y1 < this.y1) this.y1 = r.y1;
if (r.y2 > this.y2) this.y2 = r.y2;
}
public Prism union(final Shape s) {
Prism r = s.getMBR();
double ut1 = Math.min(t1, r.t1);
double ut2 = Math.max(t2, r.t2);
double ux1 = Math.min(x1, r.x1);
double ux2 = Math.max(x2, r.x2);
double uy1 = Math.min(y1, r.y1);
double uy2 = Math.max(y2, r.y2);
return new Prism(ut1, ux1, uy1, ut2, ux2, uy2);
}
public Prism getIntersection(Shape s) {
if (!s.isIntersected(this)) return null;
Prism r = s.getMBR();
double it1 = Math.max(this.t1, r.t1);
double it2 = Math.min(this.t2, r.t2);
double ix1 = Math.max(this.x1, r.x1);
double ix2 = Math.min(this.x2, r.x2);
double iy1 = Math.max(this.y1, r.y1);
double iy2 = Math.min(this.y2, r.y2);
return new Prism(it1, ix1, iy1, it2, ix2, iy2);
}
public boolean isIntersected(Shape s) {
if (s instanceof Point3d) {
Point3d pt = (Point3d) s;
return pt.t >= t1 && pt.t <= t2 && pt.x >= x1 && pt.x <= x2 && pt.y >= y1 && pt.y <= y2;
}
Prism r = s.getMBR();
if (r == null) return false;
return (this.t2 > r.t1
&& r.t2 > this.t1
&& this.x2 > r.x1
&& r.x2 > this.x1
&& this.y2 > r.y1
&& r.y2 > this.y1);
}
public void set(Shape s) {
Prism mbr = s.getMBR();
set(mbr.t1, mbr.x1, mbr.y1, mbr.t2, mbr.x2, mbr.y2);
}