Week05- xeyes

Xeyes:

void setup()
{
  size(400,400);

}
void draw()
{
  background(128);
  strokeWeight(20);
  ellipse(100,200,180,360); //圓大小
  ellipse(300,200,180,360);

  float angle1 = atan2((mouseY-200)/2 , mouseX-300);
  float newX1 = 300 + 100*cos(angle1)/2;
  float newY1 = 200 + 200*sin(angle1)/2;
  ellipse (newX1,newY1,10,10);

    float angle2 = atan2((mouseY-200)/2 , mouseX-100);
  float newX2 = 100 + 100*cos(angle2)/2;
  float newY2 = 200 + 200*sin(angle2)/2;
  ellipse (newX2,newY2,10,10);

}




抱抱龍射擊遊戲
//只能發射一顆而且會跟著mouse moving
void setup()
{
  size (400,800);
}
float ballX=200,ballY=600;
float ballVX=0, ballVY=0;
float angle=0;

void draw()
{
  background(128);
  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 mousePressed()
{
  ballVX=cos(angle);
  ballVY=sin(angle);
}





修正版:
//但是會有當機問題 只要超過10顆球

void setup()
{
size(400,800);
}
float [] ballX = new float [10];
float [] ballY = new float [10];
float [] ballVX = new float [10];
float [] ballVY = new float [10];
float [] angle = new float [10];
int now=0;
void draw()
{
  background(128);
  fill(#FA9703);
  ellipse (200,600,100,100);
  for(int i=0;i<10;i++)
  {
   fill(#F9FA03);
  ellipse(ballX[i],ballY[i],30,30);
  ballX[i]+=ballVX[i]; ballY[i]+=ballVY[i];
  }
  angle[now] = atan2(mouseY-600,mouseX-200);
}
void mouseMoved()
{
  ballX[now]=200+50*cos(angle[now]);
  ballY[now]=600+50*sin(angle[now]);
}
void mousePressed()
{
  ballVX[now]=cos(angle[now]); ballVY[now]=sin(angle[now]);
  now++;
}