找筆記?

week05

void setup(){

  size(400,800);

}

float ballX=200,ballY=600;

float ballVX=0,ballVY=0;

float angle=0;

void draw(){

  background(0,128,0);

  fill(#FA9703);ellipse(200,600,100,100);

  line(mouseX,mouseY,200,600);

  fill(#F9FA03);ellipse(ballX,ballY,30,30);

  angle=atan2(mouseY-600,mouseX-200);

  

  ballX+=ballVX;

  ballY+=ballVY;

}

void mouseMoved(){

  ballX=200+50*cos(angle);

  ballY=600+50*sin(angle);

}

void mouseMovePressed(){

  ballVX=cos(angle);

  ballVY=sin(angle);

}