Booleans and operator help

Getting Started Newbie Questions
1

Ok I’m here again. I need help to accomplish this. I have been since yesterday night and I could not. I am blocked. In my second game the controls are zoom in zoom out to move objects. There will only be three zoom in and three zoom out positions to play. The problem I have is with the count of the zoom taps and the positions of the objects. I want them to only open and close at specific positions. I can’t make this happen.

Here the code:

--zoom out/in
local function zoomButtonsTouch( event )

	if ( event.phase == "began" ) then
    
		zoomOutTap = zoomOutTap
		zoomInTap  = zoomInTap


		if ( event.target.id == "1" ) and ( canZoomOut == true)      then
      
			print( "Zoom out taps", zoomOutTap )
			if (zoomOutTap > 1) then
				zoomOutTap = zoomOutTap - 1
			        controls.objectZoomOut()
			else
				canZoomOut = false; canZoomIn = true; zoomOutTap = 4
				print( "No more zoom out!" )
		        end
		elseif ( event.target.id == "2" ) and ( canZoomIn == true) then
      
			print( "Zoom out taps", zoomInTap )
			if (zoomInTap > 1) then
				zoomInTap = zoomInTap - 1
				controls.objectZoomIn()
			else
				canZoomIn = false; canZoomOut = true; zoomInTap = 4
				print( "No more zoom! in" )
			end
		end

	end
	return true
end
2

After that “began” line why are you doing this?

zoomOutTap = zoomOutTap
zoomInTap  = zoomInTap

I don’t know the rest of the code but those might be the cause. What are those supposed to do?

3

You’re basically resetting the taps every time it’s touched. You would need to keep track of the taps outside, so something like this can work:

if ( event.phase == "began" ) then


	if ( event.target.id == "1" ) and ( canZoomOut == true)      then
  
		print( "Zoom out taps", event.target.zoomOutTap )
		if (event.target.zoomOutTap > 1) then
			event.target.zoomOutTap = event.target.zoomOutTap - 1
		        controls.objectZoomOut()
		else
			canZoomOut = false; canZoomIn = true; event.target.zoomOutTap = 4
			print( "No more zoom out!" )
	        end
	elseif ( event.target.id == "2" ) and ( canZoomIn == true) then
  
		print( "Zoom out taps", zoomInTap )
		if (event.target.zoomInTap > 1) then
			event.target.zoomInTap = event.target.zoomInTap - 1
			controls.objectZoomIn()
		else
			canZoomIn = false; canZoomOut = true; event.target.zoomInTap = 4
			print( "No more zoom! in" )
		end
	end

end
return true
4

I understand that I did not know how to explain, sorry. Those variables are there because it is the only way I have to capture the value in which the player left the respective taps.

Objects are going to have three positions, imagine it like this, big, medium and small. What I want is that if I am in the medium pressing zoom in, I can zoom out from the same position without truncating the values, causing them to go to another x or y value changing the default positions

5

@Siu yes, zoom taps variables are forward declared

6

I put together something like this. Can you check if that’s what you’re after?

--zoom out/in
local startingZoomOutTap = 3
local startingZoomInTap = 3

local zoomOutTap = startingZoomOutTap
local zoomInTap = startingZoomInTap

local canZoomIn = true
local canZoomOut = true

local function zoomButtonsTouch( event )

	if ( event.phase == "began" ) then
		print "began"
    	print ("zoomOutTap", zoomOutTap, "zoomInTap", zoomInTap)

		if ( event.target.id == "zoomOut" and canZoomOut)      then
      
			print( "Zoom out taps", zoomOutTap )
			if (zoomOutTap > 1) then
				zoomOutTap = zoomOutTap - 1
				print "ZOOM OUT"
			    --controls.objectZoomOut()
			else
				canZoomOut = false
				canZoomIn = true
				zoomOutTap = startingZoomOutTap
				print( "No more zoom out!" )
		    end
		elseif (event.target.id == "zoomIn"  and canZoomIn) then      
			print( "Zoom out taps", zoomInTap )
			if (zoomInTap > 1) then
				zoomInTap = zoomInTap - 1
				print "ZOOM IN"
				--controls.objectZoomIn()
			else
				canZoomIn = false
				canZoomOut = true
				zoomInTap = startingZoomInTap
				print( "No more zoom in!" )
			end
		end

	end
	return true
end

local buttonZoomOut = display.newRect( 200, 200, 100, 100 )
buttonZoomOut.id = "zoomOut"
buttonZoomOut:addEventListener( "touch", zoomButtonsTouch )

local buttonZoomIn = display.newRect( 600, 600, 100, 100 )
buttonZoomIn.id = "zoomIn"
buttonZoomIn:addEventListener( "touch", zoomButtonsTouch )
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7

@bgmadclown almost exact, I have to adapt it to my code and I let you know. Thanks for your help!

1 Like