import megamu.shapetween.*;
Shaper circle;
void setup(){
  circle = new CircularShaper();
  circle.setEasingMode( Shaper.SEAT );
}
void draw(){
  background(255);
  
  beginShape();
  for( float i=0; i<=1; i+= 0.05 )
    vertex( i*width, circle.shape( i )*height );
  endShape();
}
void mouseMoved(){
  circle.setTransitionPoint( norm(mouseX,0,width) , norm(mouseY,0,height) );
}
				setTransitionPoint(x)
				setTransitionPoint(x,y)