Reference for Processing version 1.2. If you have a previous version, use the reference included with your software. If you see any errors or have suggestions, please let us know.
If you prefer a more technical reference, visit the Processing Javadoc.
Name 
PVector 
Examples 
PVector v1, v2;
void setup() {
smooth();
noLoop();
v1 = new PVector(40, 20);
v2 = new PVector(25, 50);
}
void draw() {
ellipse(v1.x, v1.y, 12, 12);
ellipse(v2.x, v2.y, 12, 12);
v2.add(v1);
ellipse(v2.x, v2.y, 24, 24);
} 
Description 
A class to describe a two or three dimensional vector. This datatype stores two or three variables that are commonly used as a position, velocity, and/or acceleration. Technically, position is a point and velocity and acceleration are vectors, but this is often simplified to consider all three as vectors. For example, if you consider a rectangle moving across the screen, at any given instant it has a position (the object’s location, expressed as a point.), a velocity (the rate at which the object’s position changes per time unit, expressed as a vector), and acceleration (the rate at which the object’s velocity changes per time unit, expressed as a vector). Since vectors represent groupings of values, we cannot simply use traditional addition/multiplication/etc. Instead, we’ll need to do some "vector" math, which is made easy by the methods inside the PVector class.
There are additional methods and other ways to use some of these methods in the developers reference. 
Fields 
x 
x component of the vector 
y 
y component of the vector 
z 
z component of the vector 

Methods 
set() 
Sets the x, y, z component of the vector 
get() 
Gets the x, y, z component of the vector 
mag() 
Calculate the magnitude (length) of the vector 
add() 
Adds one vector to another 
sub() 
Subtracts one vector from another 
mult() 
Multiplies the vector by a scalar 
div() 
Divides the vector by a scalar 
dist() 
Calculate the Euclidean distance between two points 
dot() 
Calculates the dot product 
cross() 
Calculates the cross product 
normalize() 
Normalizes the vector 
limit() 
Limits the magnitude of the vector 
angleBetween() 
Calculates the angle between two vectors 
array() 
Return a representation of the vector as an array 

Constructor 
PVector()
PVector(x, y)
PVector(x, y, z) 
Parameters 
x 
float: x component 
y 
float: y component 
z 
float: z component 

Usage 
Web & Application 
Updated on June 14, 2010 12:05:29pm EDT