/**
* sets the vector to new vector
*
* @param V Vector to be set
*/
public void set(Vector3D v) {
x = v.getX();
y = v.getY();
z = v.getZ();
}
/**
* construct a new vector between two points
*
* @param point1 : initial vector
* @param point2 : final vector
*/
public Vector3D(Vector3D point1, Vector3D point2) {
this(
point2.getX() - point1.getX(),
point2.getY() - point1.getY(),
point2.getZ() - point1.getZ());
}
/**
* Constructs a new <code>Vector</code> that is the copy of specified object
*
* @param v : the <code>Vector</code> object to copy
*/
public Vector3D(Vector3D v) {
x = v.getX();
y = v.getY();
z = v.getZ();
edge = v.edge;
}
/**
* Computes the dot product of the two vectors, defined by :
*
* <p><code> x1*x2 + y1*y2 + z1*z2</code>
*
* <p>Dot product is zero if the vectors defined by the 2 vectors are orthogonal. It is positive
* if vectors are in the same direction, and negative if they are in opposite direction.
*/
public static final double dotProduct(Vector3D v1, Vector3D v2) {
return v1.getX() * v2.getX() + v1.getY() * v2.getY() + v1.getZ() * v2.getZ();
}
/**
* Computes the difference of the two vectors.
*
* @param v1 : left vector
* @param v2 : right Vector
* @return new vector obtained by subtracting right vector from left vector
*/
public Vector3D subtractVectors(Vector3D v1, Vector3D v2) {
return new Vector3D(v1.getX() - v2.getX(), v1.getY() - v2.getY(), v1.getZ() - v2.getZ());
}
/**
* Computes the sum of the two vectors.
*
* @param v1 : left vector
* @param v1: right Vector
* @return new vector representing sum of two vectors
*/
public Vector3D addVectors(Vector3D v1, Vector3D v2) {
return new Vector3D(v1.getX() + v2.getX(), v1.getY() + v2.getY(), v1.getZ() + v2.getZ());
}