incrementing a score to enable an extra life

Solar2D Lua Language
#1

Hi,

I am struggling because I ve come up against something I cant solve using simple comparasons etc, I need to use the math library.

Ok, all I need to do is award another life when the score reaches 5000, 10000, 15000 etc. I can do this easily enough when the enemies have the same score value.eg. each enemy has a score of 100.

I can then simply do :

if currrentScore == 5000 then addthelife() end

The problem is that my enemies have different score values and the chances of hitting 5000,  10000, 15000 etc are remote.

I know I have too keep track of the current score and query the difference between the last score and the new score, if its over 5000 the award a new life.

But Iam struggling to get my head round it, I have the idea but implementing it is proving difficult.

So if anybody has an example any pointers it would be awesome.

Like I said my score variable is currentScore and to add a life I use a function called addLives().

thank you

#2

One way to add a new life every 5000 points is just keep track of the score and the “life counter.”

local currentScore = 0 local lifeCounter = 0 local function addToScore(num) currentScore = currentScore + num lifeCounter = lifeCounter + num if lifeCounter \> 5000 then lifeCounter = 0 addLives() end end

So every time you add to the score, also add to the lifeCounter variable. When that hits 5K, reset it to zero and add a new life.

 Jay

#3

Just a small fix to Whye’s answer:

 if lifeCounter \>= 5000 then lifeCounter = lifeCounter - 5000 addLives() end
#4

Yeah, that improves it. Thanks!

 Jay

#5

ooooh, thanks for this guys it helped me get my head around it, these little snippets I find invaluable I often file them away for future use.

#6

One way to add a new life every 5000 points is just keep track of the score and the “life counter.”

local currentScore = 0 local lifeCounter = 0 local function addToScore(num) currentScore = currentScore + num lifeCounter = lifeCounter + num if lifeCounter \> 5000 then lifeCounter = 0 addLives() end end

So every time you add to the score, also add to the lifeCounter variable. When that hits 5K, reset it to zero and add a new life.

 Jay

#7

Just a small fix to Whye’s answer:

 if lifeCounter \>= 5000 then lifeCounter = lifeCounter - 5000 addLives() end
#8

Yeah, that improves it. Thanks!

 Jay

#9

ooooh, thanks for this guys it helped me get my head around it, these little snippets I find invaluable I often file them away for future use.