Week05

一.寫出會跟著滑鼠移動的眼睛

void setup(){
  size(400,400);
}
void draw(){
  background(128);
  strokeWeight(20);
  ellipse(100,200, 180,360);
  ellipse(300,200, 180,360);

  //ellipse(100,200, 10,10);
  //ellipse(300,200, 10,10);
  //line(mouseX, mouseY, 100,200);
  //line(mouseX, mouseY, 300,200);

  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);
}

二.砲塔設泡泡

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 mousePressed(){

  ballVX=cos(angle);

  ballVY=sin(angle);

}

增加子彈數量:

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(0,128,0);

  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++;

}