Week05 喵喵喵喵喵的上課筆記

●畫出會跟著滑鼠移動的眼睛

Step1:

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);

}

Step2:

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);

}

●發射泡泡球

Step1:

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(#FA9703);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);

}

Step2:讓球自動增加補彈(但要注意超過10顆會當機)

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++;

}

Step3:能夠反擊的狀態