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EatHotDog/EatHotDog.pde

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+// gzc exercise_wsc
+PImage wsc;
+PImage hotdog;
+int hotdognumber=3;
+
+//how many hotdogs[largest]
+Hotdog[] hg = new Hotdog[200];
+
+void setup(){
+  size(600,300);
+
+  wsc = loadImage("wsc.png");
+  hotdog = loadImage("hotdog.png");
+
+  //available hotdog_size
+  for(int i=0;i<hg.length;i++){
+    hg[i] = new Hotdog(45);
+  } 
+}
+
+void mousePressed(){
+
+  if(mousePressed&&(mouseButton == LEFT)){
+    hotdognumber=hotdognumber+1;
+  }else if(mousePressed&&(mouseButton == RIGHT)){
+    hotdognumber=hotdognumber-1;
+  }
+}
+
+void draw(){
+  background(255);
+
+  hg[1].circle();
+  //wsc
+  image(wsc,50,mouseY,150,90);
+
+  for(int i=0;i<hotdognumber;i++){
+  hg[i].left();
+  hg[i].game();
+  hg[i].disappear();
+  }
+}

EatHotDog/Hotdog.pde

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+class Hotdog{
+
+  float x;
+  float y;
+  float xspeed;
+  float hotdogsize;
+  int er = 5;
+
+  Hotdog(float tempD){
+    x=width;
+    y=random(height);
+    xspeed=random(2,6);
+    hotdogsize=tempD;
+  }
+
+  void circle(){
+    //ellipse
+  stroke(255);
+  ellipse(160,mouseY+40,er,er);
+  }
+
+  void left(){
+    x=x-xspeed;
+  }
+
+  void game(){
+    image(hotdog,x,y,hotdogsize,hotdogsize/2);
+		if(x < 0){
+			x = width;
+		}
+    }
+
+  void disappear(){
+    float d=dist(x,y,hotdogsize,160,mouseY+40,er);
+    if(d<hotdogsize+er){
+      x=(width);
+      y=random(height);
+    }
+  }
+}