• fullscreen
• Vec2D_1_2.pde
• ```// import the necessary toxiclibs libraries
import toxi.geom.*;
import toxi.processing.*;

// declare the vectors we will be using
ToxiclibsSupport gfx;
Vec2D m, n, p;

void setup() {
size(400,400);
smooth();
// initialise the ToxiclibsSupport class
gfx=new ToxiclibsSupport(this);
// create the three vectors
m = new Vec2D(50,50);
n = new Vec2D(30,30);
p = new Vec2D(10,10);
background(0);
strokeWeight(1);
}

void draw() {
// translate so the centre of the screen is the origin
translate(200,200);
for(int i=0;i<20;i++){
// rotate each of the vectors a little, change these
// to produce a variety of patterns
m.rotate(0.01);
n.rotate(0.021);
p.rotate(0.052);
// calculate the angle between m and n vectors and
// use this to set the stroke colour
float ang = m.angleBetween(n,true);
stroke(100*ang,255-100*ang,100+50*ang);
// create a temporary vector for the final position of
// the dot so we don't change our original vectors
// draw a dot at the x,y co-ordinates of the sum of the
// three vectors
// we can now do this just by passing the Vec2D object
// to the point command, easy!
gfx.point(blob);
}
}
```

### tweaks (0)

This sketch is running as Java applet, exported from Processing.

## Toxiclibs tutorials - Vec2D

Writing some very basic tutorials for the Toxiclibs library.
Part 1 Vec2D - http://www.cutsquash.com/2011/12/toxiclibs-tutorials-1-vec2d/