/**
* Scales the plane by a factor.
*
* @param scale the scale for this operation
* @return the scaled object
*/
public Plane3D scaleBy(double scale) {
double newDist = distance * scale;
Point3D newDir;
if (newDist < 0) {
newDir = normal.reflectOrigin();
newDist = -newDist;
} else {
newDir = normal;
}
return new Plane3D(newDist, newDir);
}
/**
* Translates the plane by a vector <code>translateVector</code> without changing the original
* plane.
*
* @param translateVector the point or vector by which the object shall be translated
* @return the resulting translated plane
*/
public Plane3D translateBy(Point3D translateVector) {
double additionalDist = normal.getScalarProduct(translateVector);
double newDist = distance + additionalDist;
Point3D newDir;
if (newDist < 0) {
newDir = normal.reflectOrigin();
newDist = -newDist;
} else {
newDir = normal;
}
return new Plane3D(newDist, newDir);
}
/**
* Reflects the plane at the origin without changing the original plane.
*
* @return the resulting reflected plane
*/
public Plane3D reflectOrigin() {
return new Plane3D(distance, normal.reflectOrigin());
}