week05-卓佾柔的上課筆記

一、會跟著滑鼠動的眼睛

void setup(){
  size(400,400);
}
void draw(){
   background(128);
   strokeWeight(20);
   ellipse(100,200,180,360); //眼球
   ellipse(300,200,180,360); //眼球
  
   ellipse(100,200,10,10);
   ellipse(300,200,10,10);
   line(mouseX,mouseY,100,200); //線會跟著滑鼠動
   line(mouseX,mouseY,300,200);
}

void setup(){
  size(800,800);
}
void draw(){
   background(128);
   strokeWeight(20);
   ellipse(100,200,180,360);
   ellipse(300,200,180,360);

   float angle1=atan2((mouseY-200)/2,mouseX-300); //三角函數
   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、射泡泡

void setup(){
  size(400,800);
}
void draw(){
  background(0,128,0);
  fill(#FA9703);ellipse(200,600,100,100);
  line(mouseX,mouseY,200,600);
  float angle=atan2(mouseY-600,mouseX-200);  //子彈跟著滑鼠動
  fill(#F9FA03); ellipse(200+50*cos(angle),600+50*sin(angle),30,30);
}



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);
  //float angle=atan2(mouseY-600,mouseX-200);
  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);
}



void setup(){
  size(400,800);
}
float [] ballX=new float[10];  //改成陣列讓球可以發射很多顆
float [] ballY=new float[10];
float [] ballVX=new float[10];
float [] ballVY=new float[10];
float [] angle=new float[10];
int now=0; //now which ball is it
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]);
  ballVX[now]=0;
  ballVY[now]=0;
}
void mousePressed(){
  ballVX[now]=cos(angle[now]);
  ballVY[now]=sin(angle[now]);
  now++;
  if(now>=10) now=0; //準備陣列讓球可以發射很多顆不會當機
}