hello, I'm studying about BoxWrap2D.

but I have a qeustion.
I'd like to select circles with mouse and drag it.
here coding.
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import org.jbox2d.testbed.*;
import org.jbox2d.dynamics.contacts.*;
import org.jbox2d.p5.*;
import org.jbox2d.dynamics.*;
import org.jbox2d.common.*;
import org.jbox2d.collision.*;
import org.jbox2d.dynamics.joints.*;

// Physics things we must store
Physics physics;  
Body randomBod ;  

void setup() {
 size(640,480,P3D);
 frameRate(60);

 initScene();
}

void draw() {
 background(0);
}

void initScene() {
 physics = new Physics(this, width, height);
 physics.setDensity(1.0f);
 
 
  for(int i=0; i<10; i++){
   float x0 = random(0,width);
   float y0 = random(0,height);
   randomBod = physics.createCircle(x0, y0, random(5.0f,15f));
   Vec2 vel = new Vec2(random(-30.0f,30.0f),random(-30.0f,30.0f));
   randomBod.setLinearVelocity(vel);
 }
}
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How can I select a circle and drag or throw it?
thank you  

Thanks you for your help.
I looked your examples. I can do it now!
Thank you ver much