Week05 中澤的網誌

Week05 中澤的上課筆記

一、寫出會跟著滑鼠移動的眼睛

程式碼:

void setup(){

  size(400,400);

}

void draw(){

  background(128);

  strokeWeight(20);

  ellipse(100,200,180,360);

  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);

}

二、砲塔設泡泡

程式碼:

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);

}

(二)增加子彈數量

程式碼:

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++;
}