How to make circles disappear and reappear.

Comments

• dave1707 Mod

  June 2013 edited June 2013 Posts: 7,834

  . @Jenny_Se See this program I wrote back in November.

  http://twolivesleft.com/Codea/Talk/discussion/1874#Item_12
• Jenny_Se

  June 2013 Posts: 4

  Thank you so much! That was really helpful! If you don't mind, can I ask you another question? How did you make the circles disappear and can they disappear faster as well?
• dave1707 Mod

  June 2013 Posts: 7,834

  In this section of code, I keep subtracting 1 from showLimit. If showLimit <=1, I stop drawing the circle else I draw the circle with the ellipse command. Each time you tap the circle in time, I draw another circle with the size 1 less than the previous one. So as you keep tapping the circles, they get smaller and you have less time to tap them. If you don't tap a circle in time, the game is over.

  
      if start then
          if mainLoop==0 then
              limit=limit-1
              xc=math.random(limit,WIDTH-limit)
              yc=math.random(limit,HEIGHT-limit)
              radius=limit
              showLimit=limit 
              mainLoop=100
          else
              mainLoop=mainLoop-1
              if  showLimit<=1 then
                  if xc~=-100 then
                      highScore=true
                      start=false
                  end
              else
                  showLimit=showLimit-1
                  stroke(0,255,0)
                  strokeWidth(2)
                  noFill()
                  ellipse(xc,yc,limit*2,limit*2)
                  fill(0,255,0)
                  strokeWidth(0)
                  ellipse(xc,yc,showLimit*2,showLimit*2)    
              end
          end       
      end
  
  
• Jenny_Se

  June 2013 edited June 2013 Posts: 4

  Thank you! You were really helpful!!
• dave1707 Mod

  June 2013 edited June 2013 Posts: 7,834

  .@Jenny_Se Here is a simpler version. Maybe this will help more.

  
  displayMode(FULLSCREEN)
  
  function setup()
      hit=0
      missed=0
      createCircle()
  end
  
  function draw()
      background(40, 40, 50)
      fontSize(40)
      fill(255)
      if rad>1 then
          ellipse(x,y,rad)  --draw circle
          rad=rad-1
      else
          createCircle()
          missed = missed + 1
      end
      str=string.format("Hit  %d     Missed  %d",hit,missed)
      text(str,WIDTH/2,HEIGHT-50)
      text("Try to hit the circle",WIDTH/2,HEIGHT-100)
  end
  
  function touched(t)
      if t.state==BEGAN then
          if (t.y-y)^2/rad^2+(t.x-x)^2/rad^2 <= 1 then  -- circle tapped
              createCircle()
              hit = hit + 1
          end
      end
  end
  
  function createCircle()
      rad=70  --size of circle
      x=math.random(25,WIDTH-25)
      y=math.random(25,HEIGHT-25)
  end
  
  
• Jenny_Se

  June 2013 Posts: 4

  Oh, I see! Yeah, this was exactly what I was looking for! Thank you so much!!